JP2019194427A - Drainage trap - Google Patents

Abstract

To provide a drainage trap which can smoothly perform drainage of water by keeping loss of blowing air to the minimum during drainage, and which enables reduction in size by making the length short in the direction in which a fluid flows in a valve chamber.SOLUTION: A drainage trap 10 is interposed horizontally in a drain passage. The drainage trap 10 includes a pipe-shaped body 11 having a valve chamber 13, and a valve body 12 installed in the valve chamber 13. The valve chamber 13 includes: a partition wall part 17 provided substantially perpendicular with respect to the pipe-shaped body 11; and a center through-hole 18 formed at the partition wall part 17. The valve body 12 includes: a pivot 21 which passes a substantial center point O2 of the center through-hole 18, in which both end parts are installed at corresponding places on an inner peripheral surface of the center through-hole 18 respectively, and which is mounted substantially horizontally with respect to the pipe-shaped body 11; and an opening/closing valve 20 which is mounted in the center through-hole 18 so as to rotate in the direction in which a fluid flows with the pivot 21 as a fulcrum, and which closes the center through-hole 18 when a drain pressure equal to or greater than a predetermined value is not applied.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a drain trap, and in particular, is interposed in a drain passage to prevent insects and the like from entering the upstream side from the downstream side of the drain passage or to prevent odors from entering. It relates to a trap for drainage.

  Conventionally, for example, in an air conditioner, the generated drain is accommodated in a drain pan, and discharged from the drain outlet of the drain pan to the outside through a drain pipe connected to the drain outlet. However, since the drain pipe has a structure in which the drain pan and the outside air are in direct communication, there is a problem that the drain enters the room through the drain pipe or the outside air, odor, etc. enter the room through the air conditioner. .

  For this reason, for example, as described in Patent Document 1, a drain trap is connected to an appropriate position of a drain pipe (drain hose) led out from the air conditioner to the outside of the room, and the ventilation trap blocks the ventilation with outside air. The odor from the outside is prevented from entering the indoor side through the drain pipe.

  In Patent Document 1, a mounting seat for horizontally opening and closing a valve body having a balance weight is disposed horizontally in the trap main body, and a valve seat having a drainage hole is provided from one end of the mounting seat. Inclined to the bottom, and the valve body is swung on a mounting base that is detachably attached to the mounting seat and a structure in which the trap body is partitioned into a draining inflow portion and a draining outflow portion by the mounting seat A structure in which the valve body is attached freely and the valve body is always in contact with the valve seat, and a weight is provided on the valve body to keep the valve body closed so that air in the air conditioner does not escape except during drainage. A structure of a horizontally placed drainage trap having a structure in which the mounting base is configured to be removable from the mounting seat by removing the cap member is disclosed.

JP 2010-275763 A

  The drainage trap described in Patent Document 1 is used to seal the on-off valve (valve element) to prevent the condensed water (drain water) generated in the air conditioner from flowing from the upstream side to the downstream side of the drainage passage. It is a so-called one-way catch valve type structure in which stopping is performed with a weight. Therefore, when discharging the condensed water (drain water) generated mainly in the air conditioner where positive pressure is applied, it is difficult to discharge only the condensed water to the downstream side. Water and air are discharged at the same time. Therefore, in order to reduce the amount of air that is discharged simultaneously with the discharge of water, the weight of the weight for keeping the on-off valve closed is increased. However, when air pressure higher than that is applied, there is a problem that air outflow occurs in proportion to the air pressure, and air is discharged together with water.

  Further, the drainage trap described in Patent Document 1 is provided with a mounting seat disposed horizontally in the trap main body (valve chamber), and a valve seat having a flow hole is provided at one end of the mounting seat in the downstream direction. Inclined from the bottom to the bottom. Therefore, both require a space in the direction in which the fluid flows, that is, a space for providing the mounting seat in the horizontal direction, a space for tilting the valve body on the valve seat, and the like. There is a problem in that the length of the trap in the flow direction increases and the size of the trap increases. Therefore, there is a demand for a miniaturized drainage strap structure.

  Therefore, during drainage, the air pressure in the upstream drainage passage is shut off, the loss of blown air can be kept to a minimum, water can be discharged smoothly, and the length of the valve in the direction in which the fluid flows is shortened. Thus, a technical problem to be solved in order to provide a trap for drainage that enables miniaturization arises, and the present invention aims to solve this problem.

  In order to achieve the above object, a drain trap according to the present invention is a horizontally installed drain trap interposed in a drain passage, and has an inlet port connected to the drain passage on the upstream side and a downstream side. A tubular body having a discharge port connected to the drainage passage on the side, a valve chamber provided between the inlet and the discharge port, and a valve body installed in the valve chamber, The valve chamber is provided substantially perpendicularly to the tubular body, and partitions the interior of the tubular body into a space on the inlet portion side and a space on the outlet portion side, and a space on the inlet portion side. And the central through hole formed in the partition wall so as to communicate with the space on the discharge port side, the valve body passes through the substantial center of the central through hole, and both end portions pass through the central through hole. Are installed at opposite positions on the inner peripheral surface of the tubular body and mounted substantially horizontally with respect to the tubular body. A pivot shaft, and an on-off valve that is rotatably mounted in the central through hole in the direction in which the fluid flows with the pivot shaft as a fulcrum, and closes the central through hole when a predetermined drainage pressure is not applied, A drain trap is provided.

  According to this configuration, since the area of the on-off valve that is divided up and down from the pivot is substantially equal, the on-off valve is driven by the positive or negative air pressure generated by the air conditioner until the upstream drainage fills the inlet. The sealing force works and keeps the on-off valve closed. Once the drainage fills the inlet portion and the inlet portion side is blocked, the positive pressure or negative pressure air is blocked into the tubular body. When this blockage of air occurs, the air pressure applied to the upper part of the on-off valve decreases, and the on-off valve is pushed open by the pressure of the drainage water that fills the lower part of the on-off valve, and the upstream drainage is discharged to the outlet port. Spill into. Then, when the discharge continues and the water level at the inlet decreases, positive or negative pressure air is reapplied to the upper and lower parts of the on-off valve in the tubular body to act as a sealing force on the on-off valve. Is limited. By repeating this operation, the loss of blown air is kept to a minimum, and the condensed water can be drained.

  In addition, a partition wall having a central through hole that partitions the inside of the tubular body into a space on the inlet side and a space on the outlet side is provided substantially perpendicular to the tubular body. In addition, a pivot is provided on the inner peripheral surface of the central through-hole, and an open / close valve that opens and closes the central through-hole is mounted in the central through-hole so as to be rotatable in the direction of fluid flow with the pivot as a fulcrum. That is, in the relationship between the thickness of the partition wall in the direction in which the fluid flows in the valve chamber and the opening / closing movement range of the opening / closing valve, the partition wall is provided within the opening / closing movement range of the opening / closing valve. It is provided in a state of being absorbed within the moving range. Therefore, in designing the tubular body, the dimension of the valve chamber in the direction in which the fluid flows is only a size that can secure the opening / closing movement range of the opening / closing valve, ignoring the thickness of the partition wall. As a result, the size of the direction in which the fluid flows in the valve chamber can be shortened, and the entire drainage trap can be downsized.

  The drain trap according to the present invention is preferably formed so that the center of the central through hole is biased upward with respect to the center line of the upstream drain passage.

  With this configuration, when the drainage reaches a predetermined water level in the upstream drainage passage, the balance of the air pressure acting on the top and bottom of the on-off valve across the pivot is not maintained, and the lower part of the on-off valve is pushed by the pressure of the drainage. The on-off valve is pushed open, and the upstream drainage flows out to the discharge port. Further, when the drainage falls below a predetermined water level in the upstream drainage passage, the air pressure acting on the top and bottom of the on-off valve is balanced across the pivot, and the force that seals the on-off valve works to restrict the drainage.

  In the drain trap according to the present invention, it is preferable that the center of the central through hole is set at a position substantially equal to the upper portion of the inner peripheral surface of the minimum diameter in the drain passage on the upstream side.

  According to this configuration, the on-off valve is sealed with positive or negative air pressure generated by the air conditioner until the water level at which the upstream side drainage fills the upper part of the inner peripheral surface of the minimum diameter in the upstream side drainage passage. The force works and keeps the on-off valve closed. Once the drainage fills the upper part of the inner peripheral surface of the smallest diameter in the upstream drainage passage and the blocking of positive and negative pressure air into the tubular body occurs, the air pressure applied to the upper part of the on-off valve decreases. The on / off valve is pushed open by the pressure of the drainage water that fills the lower part of the on / off valve, and the upstream drainage flows out to the discharge port. Then, when the discharge continues and the water level at the inlet decreases, positive or negative pressure air is reapplied to the upper and lower parts of the on-off valve in the tubular body to act as a sealing force on the on-off valve. Is limited. By repeating this operation, the loss of blown air is kept to a minimum, and the condensed water can be drained.

  Further, in the drain trap according to the present invention, the on-off valve is configured such that a lower part of the on-off valve disposed below the pivot receives the drain pressure and rotates from the upstream side to the downstream side to open. preferable.

  According to this configuration, when the upstream drainage fills the inflow port and the positive pressure and negative pressure air are blocked inside the tubular body, the air pressure applied to the upper part of the on-off valve is reduced, and the lower part of the on-off valve is The filled drainage pressure is applied, the open / close valve is pushed open, and it flows out to the discharge port.

  Further, the drain trap according to the present invention preferably has a biasing means for biasing the on-off valve to a closed posture when the on-off valve is not subjected to a drain pressure higher than the predetermined value.

  According to this configuration, the urging means provided in the on-off valve positively applies a closing force to the valve body, so that the on-off valve can be reliably engaged when the drain pressure is not exceeded. Can be closed.

  In the drain trap according to the present invention, it is preferable that the biasing means is a balance weight attached to a lower portion of the on-off valve.

  According to this structure, the balance weight provided at the lower part of the on-off valve gives a force in the closing direction to the valve body so that the on-off valve is securely closed when the drain pressure is not exceeded. Can do.

  Further, the drain trap according to the present invention is provided with a step on the inner peripheral surface of the central through-hole so as to abut against the on-off valve and restrict rotation of the on-off valve at a closed position. preferable.

  According to this configuration, when the valve body is closed, the rotation of the valve body can be regulated at the closed position by the step provided on the inner peripheral surface of the central through hole, and can be reliably closed.

  Moreover, it is preferable that the trap for drainage which concerns on this invention is provided with the said partition part so that attachment or detachment is integral with the said valve body with respect to the said valve chamber.

  According to this configuration, when performing maintenance work such as cleaning the valve chamber or replacing parts, the partition wall is removed together with the valve body from the valve chamber, and cleaning of the partition wall, the valve body and the valve chamber, parts replacement, etc. Maintenance work can be performed easily.

  In the drain trap according to the present invention, it is preferable that the tubular main body includes a removable lid that opens the valve chamber.

  According to this configuration, the lid can be opened, and maintenance work such as cleaning of the valve chamber and replacement of parts can be easily performed by opening the lid.

  According to the invention, during drainage, the air pressure in the upstream drainage passage is shut off, the loss of blown air is kept to a minimum, only water can be discharged smoothly, and the size of the valve chamber in which the on-off valve is arranged is reduced. It is possible to reduce the size of the whole drain trap.

It is a front view of the trap for drainage shown as one example of the present invention. FIGS. 2A and 2B are cross-sectional views taken along the line A-A in FIG. 1, in which FIG. 1A is a diagram illustrating a state in which the on-off valve is closed, and FIG. FIG. 3 is an enlarged cross-sectional view of FIG. 2 showing a structure for restricting the rotation of the on-off valve in the drain trap in the same manner as in FIG. 2, (a) is a state in which the on-off valve is closed, FIG. It is a front view of the trap for drainage shown as a modification of the present invention. It is the BB sectional view taken on the line of FIG. It is a figure of the state which the on-off valve of the drainage trap shown in FIG. 5 is open.

  The present invention cuts off the air pressure in the upstream drainage passage at the time of drainage, keeps the loss of blown air to a minimum, can smoothly drain water, and has a length in the direction in which the fluid flows in the valve chamber. In order to achieve the purpose of providing a drain trap that can be reduced in size by shortening the length of the drain trap, a horizontal drain trap disposed in the drain passage, A tubular body having a connected inlet portion, a discharge port portion connected to the drainage passage on the downstream side, and a valve chamber provided between the inlet port and the discharge port portion; and installed in the valve chamber A partition wall part provided substantially perpendicular to the tubular body, and partitioning the inside of the tubular body into a space on the inlet side and a space on the outlet side. The space on the inlet side and the space on the outlet side communicate with each other. It has a central through hole formed in the partition wall, and the valve body passes through the approximate center of the central through hole, and both end portions are respectively installed at opposing locations on the inner peripheral surface of the central through hole, A pivot that is mounted substantially horizontally with respect to the tubular body, and a pivot that is rotatably mounted in the central through-hole in the direction in which fluid flows with the pivot as a fulcrum, and when the drainage pressure is not higher than a predetermined level. And an on-off valve that closes the central through hole.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals are given to the same elements throughout the description of the embodiments. In addition, expressions indicating directions such as up and down and left and right are not absolute and are appropriate when the posture of each part of the drainage trap of the present invention is depicted, but when the posture changes Should be interpreted according to changes in posture.

  1 and 2 show an embodiment of the drain trap according to the present invention. FIG. 1 is a front view of the drain trap 10 and FIG. 2 is a cross-sectional view taken along line AA of FIG. In the following description, the right side in FIG. 2 is the upstream side of the drainage passage, the left side is the downstream side of the drainage passage, the up and down direction is up and down, and the direction perpendicular to the page is the left and right.

  1 and 2, the drain trap 10 includes a tubular main body 11, a valve body 12 installed in the tubular main body 11, and the like.

  The tubular main body 11 is formed of a synthetic resin material in a tubular shape, and a valve chamber 13 is provided at a central portion in the left-right direction. The tubular main body 11 has a tubular inflow port portion 11a connected to an upstream drainage passage from which fluid such as drain water is discharged to one end side facing the valve chamber 13 and drain water on the other end side. A tubular discharge port portion 11b connected to a downstream drainage passage for discharging the etc. is formed extending from the valve chamber 13 in the horizontal direction. In addition, the code | symbol O1 in a figure shows the center axis line of the tubular main body 11. FIG. Moreover, the arrow shown with the code | symbol 25 has shown the direction through which fluids, such as drain water, flow.

  In addition, a part of the tubular body 11 forming the valve chamber 13 is integrally provided with a maintenance cylinder portion 11c extending vertically upward from the outer periphery of the tubular body 11 and having an upper opening 11d on the upper surface. Is formed. The maintenance cylinder portion 11c is formed as a cylindrical body having a circular shape or a rectangular shape in plan view.

  A lid 14 as a cap is detachably attached to the upper opening 11d of the maintenance cylinder 11c. Therefore, when the lid 14 is attached to the upper portion of the maintenance cylinder portion 11c, the upper opening 11d is closed by the lid 14, and conversely, when the lid 14 is removed, the upper opening 11d is opened and the upper portion of the valve chamber 13 is opened. Is now open. The engagement means between the maintenance cylinder 11c and the lid 14 is not particularly limited, but the outer periphery of the upper opening 11d, that is, between the outer peripheral surface of the maintenance cylinder 11c and the inner peripheral surface of the lid 14. In addition, it is conceivable to provide a protrusion and a recess that can be engaged with and disengaged from each other.

  Further, in the tubular body 11, a wall portion 15 having a circular opening 15 a is formed between the inflow port portion 11 a and the valve chamber 13, and a circular shape is similarly formed between the discharge port portion 11 b and the valve chamber 13. Wall portions 16 having openings 16 a are provided perpendicular to the tubular body 11. In this embodiment, the inner diameter of the opening 15a on the inlet port 11a side and the inner diameter of the opening 16a on the outlet port 11b side are formed substantially equal, and the centers of the opening 15a and the opening 16a are also the center O1 of the tubular body 11. Respectively.

  Further, in the valve chamber 13, a partition wall portion 17 that divides the inside of the tubular main body 11 into a space 11 A on the inflow port portion 11 a side and a space 11 B on the discharge port portion 11 b side in the valve chamber 13 is provided. It is provided substantially perpendicular to.

  The partition wall 17 is formed separately from the tubular body 11 in this embodiment. This is because, for example, when the inside of the valve chamber 13 is cleaned, when the lid 14 of the maintenance cylinder portion 11c is removed to open the upper opening 11d and the partition portion 17 is slid upward, the partition portion 17 is moved into the valve chamber 13. It can be removed from and removed.

  In addition, when it is not necessary to remove the partition wall portion 17, the partition wall portion 17 may be formed integrally with the tubular main body 11. The partition wall 17 can be fixed in the valve chamber 13 by forming a guide groove extending in the vertical direction in the maintenance cylinder 11c and fitting the guide groove into the guide groove so as to be slidable, or for maintenance. A method of fixing the space between the cylindrical portion 11c and the partition wall portion 17 with a screw is conceivable.

  The partition wall 17 is provided with a central through hole 18 for communicating the space 11A on the inlet 11a side and the space 11B on the outlet 11b. The central through hole 18 is a substantially circular hole, and has an inner diameter substantially equal to the inner diameter of the opening 15 a of the wall portion 15 and the inner diameter of the opening 16 a of the wall portion 16. In the present embodiment, the inner circumference of the central through hole 18 substantially coincides with the center O1 of the tubular body 11, and the center O2 of the central through hole 18 is substantially the same as the inner circumference of the opening 15a of the wall portion 15 and the opening 16a of the wall portion 16. They are provided so as to match. Further, the center O2 of the central through hole 18 is provided so as to be biased upward by a distance H from the center O1 of the tubular main body 11.

  In the present embodiment, the center O2 of the central through hole 18 is the uppermost inner peripheral surface of the upstream drainage passage (the space 11A on the inlet portion 11a side), that is, the inner periphery of the opening 15a in the wall portion 15. Although it is provided at a position substantially equal to the surface upper portion 15a1, it may not be strictly the inner peripheral surface upper portion 15a1 as long as it is a position around the inner peripheral surface upper portion 15a1 in the vertical direction. In the case where the wall portion 15 is not provided, the upper portion of the inner peripheral surface having the smallest diameter is the upper portion of the inner peripheral surface of the inlet portion 11a, and the center O2 of the central through hole 18 is based on the inlet portion 11a. Set.

  Further, the inner peripheral surface of the central through hole 18 is provided with a step 19a as a stopper for restricting the valve body 12 from rotating toward the discharge port portion 11b on a part of the upper side across the center O2. A step 19b serving as a stopper that restricts the valve body 12 from rotating toward the inlet portion 11a is provided on a part of the lower side across O2.

  In FIG. 3, a step 19 b provided at a part on the lower side across the center O 2 and a part of the valve body 12 are enlarged, and the step 19 b is formed from the inner peripheral surface of the central through hole 18. A part of the inner peripheral surface is formed to protrude toward the center O2. Although not shown in an enlarged view, the step 19a is formed symmetrically with the step 19b.

  The valve body 12 includes an on-off valve 20, a pivot 21, a biasing means 22, a bearing 23, and the like.

  The on-off valve 20 is formed as a substantially circular disc. The outer diameter of the on-off valve 20 is slightly smaller than the inner diameter of the central through-hole 18 and larger than the distance between the steps 19 a and 19 b in the central through-hole 18. It can be arranged inside.

  The pivot shaft 21 is integrated in parallel with the on-off valve 20 so as to come out of the other outer peripheral surface of the on-off valve 20 through the center O3 of the on-off valve 20 from one outer peripheral surface of the on-off valve 20. Is the axis. The on-off valve 20 and the pivot 21 may be integrally formed of a synthetic resin material or the like. The on / off valve 20 is divided by the pivot 21 into an on / off valve upper part 20a disposed on the upper side of the pivot 21 and an on / off valve lower part 20b disposed on the lower side.

  The pivot 21 is rotatably mounted in the central through hole 18 through a pair of bearings 23 and 23 provided in the central through hole 18 of the partition wall portion 17. More specifically, as shown in FIG. 1, the pivot shaft 21 passes through substantially the center O <b> 2 of the central through hole 18, and both ends of the pivot shaft 21 are in bearing positions at opposite positions on the inner peripheral surface of the central through hole 18. 23 and 23, and is attached to the central through hole 18 integrally with the on-off valve 20 in a substantially horizontal posture with respect to the tubular body 11.

  Since the center O2 of the central through hole 18 is biased upward by a distance H from the center O1 of the tubular main body 11, the pivot shaft 21 disposed in the central through hole 18 is shown in FIGS. Thus, it is biased upward by a distance H from the center O1 of the tubular body 11, and in this embodiment, it is substantially the same as the inner peripheral surface upper portion 15a1 having the smallest diameter in the upstream drainage passage (the space 11A on the inlet portion 11a side). It is provided at the same position.

  In the state where the pivot 21 is attached in the central through hole 18, the on-off valve 20 is also arranged in a state orthogonal to the direction in which the fluid flows in the central through hole 18 and is rotatably attached together with the pivot 21. . Therefore, when the fluid flows from the direction of the arrow 25, the on-off valve 20 is rotated in the direction in which the fluid flows together with the pivot 21.

  The biasing means 22 is attached to a position on the lower side of the pivot 21, that is, a surface on the outlet side of the on-off valve lower portion 20b of the on-off valve 20 disposed on the lower side of the pivot 21 (a surface facing the space 11B). Balance weight (weight).

  The biasing means 22 always applies a closing direction rotational force (biasing force) to the on-off valve 20 due to its own weight. Therefore, the on-off valve 20 is closed by the urging force of the urging means 22 while the evacuating pressure of the urging means 22 is not applied to the urging force of the urging means 22. When a drainage pressure higher than a predetermined value is applied, it is rotated in the opening direction to be in an open state.

  The biasing means 22 may be, for example, a spring member other than the balance weight, as long as it is a means capable of holding the on-off valve 20 in a closed position when the on-off valve 20 is not subjected to a drain pressure higher than a predetermined level. .

  The drain trap 10 configured as described above is disposed in the middle of a drain discharge passage in an air conditioner, for example, so that condensed water (drain water) generated in the air conditioner flows from the upstream side to the downstream side of the discharge passage. Restrict. Therefore, the drain discharge passage of the same drainage system is connected to the inlet portion 11a side and the discharge port portion 11b side of the tubular body 11.

  Next, the operation of the drainage trap 10 according to the present embodiment will be described.

  Up and down from the pivot 21 by the positive or negative air pressure generated by the air conditioner until the water level at which the upstream drainage through the drain discharge passage fills the inflow port 11a (the opening 15a having the minimum diameter in the drain passage). Since the divided open / close valves 20 have the same area, a sealing force is applied to the open / close valve 20 by the urging force of the urging means 22, and as shown in FIG. 2A and FIG. 20, the outer peripheral edge portion of the on-off valve upper portion 20 a is in contact with the step 19 a, and the outer peripheral edge portion of the on-off valve lower portion 20 b in the on-off valve 20 is in contact with the step 19 b, so that the on-off valve 20 passes through the central through hole 18. Keep closing. Therefore, in this closed state, the wastewater accumulated in the space 11A on the inlet 11a side does not flow to the space 11B side on the outlet 11b side.

  On the other hand, when the drainage from equipment such as an air conditioner accumulates up to the inner peripheral surface upper portion 15a1 of the opening 15a in the wall 15 and reaches a water level that fills the space 11A on the inlet portion 11a side, positive pressure into the tubular body 11 is reached. Alternatively, the negative air pressure is cut off, and the air pressure applied to the on-off valve upper portion 20a is reduced.

  When the filled drainage pressure exceeds the urging force of the urging means 22, the on-off valve lower portion 20b is pushed toward the discharge port portion 11b, and the on-off valve 20 has the pivot 21 as a fulcrum as shown in FIG. And it rotates to the direction where a fluid flows, as shown in (b) of Drawing 3. That is, the on-off valve 20 is pushed open, and the drainage flows through the central through hole 18 to the discharge port portion 11b.

  Moreover, when discharge continues and the water level of the space 11A on the inlet 11a side decreases, the positive or negative pressure air generated by the air conditioner is on the on / off valve upper part 20a and on / off valve lower part of the on / off valve 20 in the tubular body 11 A force is applied to the portion 20b again to seal the on-off valve 20. The on-off valve 20 closes the central through hole 18 again by the urging action of the urging means 22 until the on-off valve lower part 20b and the on-off valve upper part 20a abut against the steps 19a, 19b, respectively, and the drainage is restricted. .

  By repeating the above-described operation, the loss of blown air can be kept to a minimum and the condensed water can be drained. In addition, the drainage is prevented from flowing backward from the space 11B on the discharge port portion 11b side to the space 11A side on the inlet port portion 11a side, and at the same time, the outside air and odor are prevented from flowing backward.

  Further, if dust or foreign matter accumulates or becomes clogged in the drain trap 10 during use, the lid 14 is removed, and the partition wall 17 is removed together with the valve body 12 from the valve chamber 13. Can be easily cleaned, and parts can be replaced very easily.

  Therefore, in the drainage trap 10 according to the present embodiment, the pivot 21 that supports the rotation of the on-off valve 20 is biased by the distance H above the center O1 of the tubular body 11 that is the drainage passage, and the upstream drainage. It is provided at a position substantially equal to the inner diameter upper surface 15a1 having the smallest diameter in the passage. The on-off valve 20 is sealed with positive or negative air pressure generated by the air conditioner until the upstream drainage fills the minimum inner diameter upper surface 15a1 in the upstream drainage passage.

  Further, when the drainage reaches a water level that satisfies the inner peripheral surface upper part 15a1, the positive pressure or the negative pressure of the tubular main body 11 is blocked, and the air pressure applied to the upper / lower valve upper part 20a is reduced, and the lower part of the on / off valve lower part. The on-off valve 20 is pushed open by the pressure of the drainage filled with 20b, and the upstream drainage flows out to the discharge port 11b.

  Further, when the discharge continues and the water level on the inlet 11a side decreases, positive pressure or negative pressure air is again applied to the upper and lower portions 20a, 20b of the on-off valve 20 in the tubular body 11 to the on-off valve 20. The sealing force works. Thus, since the operation | movement which restrict | limits drainage is repeated, drainage of condensed water is attained, keeping the loss of blowing air to the minimum.

  In addition, a partition wall portion 17 having a central through hole 18 that partitions the inside of the tubular body 11 into a space 11A on the inlet 11a side and a space 11B on the outlet 11b side is provided substantially perpendicular to the tubular body 11. In addition, an on-off valve 20 is attached to the inner peripheral surface of the central through hole 18 via a pivot 21 so as to be rotatable in the direction in which the fluid flows. That is, the relationship between the thickness of the partition wall 17 in the direction in which the fluid flows in the valve chamber 13 and the opening / closing movement range of the opening / closing valve 20 is that the partition wall 17 is provided within the opening / closing movement range of the opening / closing valve 20. It is provided in a state in which the thickness of the partition wall portion 17 is absorbed.

  Thus, in designing the tubular body 11, the dimension of the valve chamber 13 in the direction in which the fluid flows is only a size that can ensure the opening / closing movement range of the opening / closing valve 20, ignoring the thickness of the partition wall 17. As a result, the size of the direction in which the fluid flows in the valve chamber 13 can be shortened, and the entire drainage trap 10 can be downsized.

  Moreover, since the on-off valve 20 is configured such that the on-off valve lower portion 20b of the on-off valve 20 disposed on the lower side of the pivot 21 rotates and opens from the upstream side to the downstream side, the upstream drainage opens the inlet portion 11a. Even if the water level is met, the on-off valve lower portion 20b is rotated from the upstream side toward the downstream side so that the entire on-off valve 20 is always rotated about the pivot 21 and the central through hole 18 is opened. The on-off valve 20 can be opened smoothly.

  Further, since the inner peripheral surface of the central through hole 18 is provided with steps 19a and 19b as stoppers that contact the outer peripheral edge of the on-off valve 20 and restrict the rotation of the on-off valve 20 at the closed position, the on-off valve 20 When closed, the contact of the steps 19a and 19b provided on the inner peripheral surface of the central through hole 18 restricts the rotation of the on-off valve 20 at the closed position, so that the on-off valve 20 can be reliably closed.

  In addition, since the tubular body 11 is provided with a removable lid 14 that opens the valve chamber 13, if dust or foreign matter accumulates or becomes clogged in the drain trap 10, the lid 14 is removed, Further, if necessary, the partition wall 17 can be removed together with the valve body 12, and maintenance work such as cleaning of the valve chamber 13 and replacement of parts can be easily performed.

  Next, the configuration of the drainage trap 10 according to a modification of the present invention will be described based on the drawings. The configuration of the drain trap 10 according to the present modification is the same as that of the drain trap 10 according to the above-described embodiment, except for the configuration described below, and redundant description is omitted.

  The center line O11 of the upstream drainage passage (space 11A on the inlet 11a side) is provided so as to be biased upward with respect to the center line O12 of the downstream drainage passage (space 11B of the outlet 11b). ing.

  The center O2 of the central through hole 18 is disposed on the center line O11 of the inflow port portion 11a. In this modification, the center O2 of the central through hole 18 and the pivot 21 arranged in the central through hole 18 are the upper part of the inner peripheral surface of the smallest diameter in the space 11A on the inflow port portion 11a side, that is, the inner periphery of the wall portion 15. It is set below the upper surface 15a1. As a result, as compared with the drain trap 10 according to the above-described embodiment, the positive or negative air pressure generated by the air conditioner acts on the on-off valve 20 as much as the on-off valve 20 approaches the center line O11. easy.

  The inner diameter of the central through hole 18 is formed larger than the inner diameter of the opening 15a and the inner diameter of the opening 16a.

  The on-off valve 20 is formed to have a slightly larger diameter than the central through hole 18 of the partition wall portion 17, and one surface of the on-off valve upper portion 20 a can abut on the upper side surface of the partition wall portion 17. The other surface can contact the lower side surface of the partition wall portion 17.

  Next, the operation of the drain trap 10 according to this modification will be described.

  Up to the water level where the upstream drainage through the drain discharge passage satisfies the inflow port portion 11a (the opening 15a having the smallest diameter in the drain passage), the positive or negative air pressure generated by the air conditioner is sandwiched between the pivot 21. The on-off valve upper portion 20a and the on-off valve lower portion 20b act substantially equally.

  Further, the urging force of the urging means 22 always works in the direction of closing the on-off valve 20, and the on-off valve 20 keeps closing the central through hole 18. Accordingly, in such a closed state, the waste water accumulated in the space 11A on the inlet 11a side does not flow to the space 11B side on the outlet 11b side.

  Next, when drainage from equipment such as an air conditioner accumulates up to the inner peripheral surface upper portion 15a1 of the opening 15a in the wall portion 15 and reaches a water level that fills the space 11A on the inlet portion 11a side, positive discharge to the inside of the tubular main body 11 occurs. The air pressure of the pressure or the negative pressure is cut off, and the air pressure applied to the opening / closing valve upper portion 20a is reduced.

  When the pressure of the filled drainage exceeds the urging force of the urging means 22, the on-off valve lower portion 20b is pushed toward the discharge port 11b, and the on-off valve 20 is fluid as shown in FIG. Rotate in the direction that flows. That is, the on-off valve 20 is pushed open, and the drainage flows through the central through hole 18 to the discharge port portion 11b.

  Next, when the discharge continues and the water level in the space 11A on the inlet 11a side drops, the positive or negative air pressure generated by the air conditioner is applied to the on-off valve upper part 20a and the on-off valve lower part 20b. Apply again. At this time, the center O2 of the central through hole 18 is set below the inner peripheral surface upper portion 15a1 of the wall portion 15, so that an air conditioner is generated as compared with the drain trap 10 according to the above-described embodiment. Positive or negative air pressure tends to act on the on-off valve 20.

  In addition to the positive or negative air pressure generated by such an air conditioner, a force for sealing the on-off valve 20 is exerted by the urging action of the urging means 22, so that the on-off valve 20 abuts against the partition wall portion 17. The central through hole 18 is closed. This restricts the drainage accumulated in the space 11A on the inlet 11a side from flowing toward the space 11B on the outlet 11b.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified one.

10 Drainage trap 11 Tubular body (drainage passage)
11A Space 11B on the inlet side 11B Space 11a on the outlet side 11a Inlet 11b Outlet portion 11c Maintenance cylinder 11d Upper opening 12 Valve element 13 Valve chamber 14 Lid 15 Wall 15a Opening 16 Wall 16a Opening 17 Partition Portion 18 Central through holes 19a, 19b Step 20 Open / close valve 20a Open / close valve upper portion 20b Open / close valve lower portion
21 pivot 22 urging means 23 bearing 25 fluid flow direction O1 center axis O2 of the tubular main body center O3 of the central through hole rotation axis H of the valve body biased distance

Claims (9)

A horizontal type drainage trap interposed in the drainage passage,
A tubular body having an inlet portion connected to the drainage passage on the upstream side, a discharge port portion connected to the drainage passage on the downstream side, and a valve chamber provided between the inlet portion and the discharge port portion And a valve body installed in the valve chamber,
The valve chamber is
A partition part provided substantially perpendicular to the tubular body, and partitioning the inside of the tubular body into a space on the inlet side and a space on the outlet side;
A central through hole formed in the partition wall so as to communicate the space on the inlet side and the space on the outlet side;
The valve body is
A pivot that passes through the approximate center of the central through-hole and has both ends thereof installed at opposite locations on the inner peripheral surface of the central through-hole, and is attached substantially horizontally to the tubular body;
An on-off valve that is rotatably mounted in the direction of fluid flow with the pivot as a fulcrum in the central through hole, and that closes the central through hole when a drain pressure higher than a predetermined level is not applied,
A trap for drainage characterized by comprising:   The drain trap according to claim 1, wherein the center of the central through hole is formed so as to be biased upward with respect to a center line of the upstream drain passage.   The drain trap according to claim 1 or 2, wherein the center of the central through hole is set at a position substantially equal to an upper portion of the inner peripheral surface of the minimum diameter in the drain passage on the upstream side.   4. The open / close valve according to claim 1, wherein a lower part of the open / close valve disposed below the pivot receives the drain pressure and rotates to open from the upstream side to the downstream side. 5. The drainage trap according to claim 1.   The said on-off valve has an urging means which urges | biases the said on-off valve to a closed attitude | position when the drainage pressure more than the said predetermined is not applied, The any one of Claim 1 to 4 characterized by the above-mentioned. The trap for drainage according to the item.   The drainage trap according to claim 5, wherein the biasing means is a balance weight attached to a lower part of the on-off valve.   The step according to any one of claims 1 to 6, wherein a step is provided on an inner peripheral surface of the central through hole so as to abut against the on-off valve and restrict rotation of the on-off valve to stop at a closed position. The drainage trap according to claim 1.   The drainage trap according to any one of claims 1 to 7, wherein the partition wall is detachably provided integrally with the valve body with respect to the valve chamber.   The drainage trap according to any one of claims 1 to 8, wherein the tubular body includes a removable lid that opens the valve chamber.