JP2010207677A - Filter structure of circulation adapter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter structure of a circulation adapter capable of increasing a filter effective area while securing the strength of a filter member. <P>SOLUTION: Inside a ring opening 91 surrounded by an inner ring part 87 and an outer cylinder part 88, a first rib part 89 installed more on the rear side than an inner ring step part 87c and more on the front side than an inner ring back surface part 87a in an axial direction and a deceleration part 90 facing a suction end part 83 are installed. The front surface part 85a of a mesh part 85 is configured such that an inner peripheral part back surface is abutted to the surface of the inner ring step part 87c and an outer peripheral part back surface is abutted to the axial direction distal end part surface of the outer cylinder part 88, and a gap is formed between the front surface of the first rib part 89 and the back surface of the front surface part 85a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a filter structure of a circulation adapter used by being attached to a bathtub to supply hot water to the bathtub, and more particularly to a filter structure having a filter portion covering an opening capable of sucking hot water.

  2. Description of the Related Art Conventionally, there is a circulation adapter that is attached to a side wall surface of a bathtub, connects a bathtub and a bath water heater, and forcibly circulates hot water between the bathtub and the bath water heater. This circulation adapter is composed of a bathtub fitting, a bathtub clamp, a passage switching mechanism, and a filter.

  The filter captures foreign matters such as hair and dust mixed in hot water sucked from the circulating adapter. The filter part of this filter is formed by punching a single stainless steel plate and has a punching metal structure with a large number of holes for catching foreign matter on the front surface of the filter. The structure is such that it is attached to a detachable cylindrical filter body.

  Since it is difficult to ensure the strength of the filter itself in such a single stainless steel plate filter portion, a plurality of reinforcing ribs that are opposed to the filter portion are generally formed at the front opening of the filter main body portion.

  Patent Document 1 discloses a filter composed of a filter main body that can be attached to and detached from a hot water supply circulation connector for a bathtub, a filter portion that covers an opening of the filter main body, and a filter cover that is attached to the filter main body with the filter portion interposed therebetween. A technology has been proposed for a cap, in which a locking convex portion of a filter cover can be locked by sliding a slide groove of a filter body.

In Patent Document 1, a plurality of ribs that are radially suspended from the front center portion to the outer peripheral edge portion are provided on the filter main body and the filter cover, respectively, and these ribs are arranged so as to overlap in a front view.

JP-A-9-253425

  If the filter part is clogged with trapped foreign matter, it may deteriorate in appearance and require maintenance, and the circulation efficiency of the hot water decreases due to an increase in flow path resistance. When the hot water flow rate falls below the reference value, the safety device on the hot water supply side may be activated and the operation of the hot water supply may be stopped.

  If clogging occurs in a part of the filter section, the flow rate of hot water passing through the area where no foreign matter is attached increases, and the increase in this flow rate causes the concentration of foreign matters in the area where hot water can pass. A vicious circle in which road resistance further increases is caused.

In addition, since the circulation adapter having a plurality of operation modes needs to be made compact, the distance between the filter part and the suction port is further arranged in the layout, and the flow rate of the hot water passing through the filter part is further increased. It tends to be faster.

In order to secure a so-called effective area of the filter portion through which hot water can pass, it is conceivable to eliminate the ribs formed on the filter body portion. However, in order to secure the strength of the filter member, it is necessary to increase the plate thickness of the filter portion, and new problems arise in terms of productivity and cost such as press working.

  The objective of this invention is providing the filter structure of the circulation adapter which can increase a filter effective area, ensuring the intensity | strength of a filter member.

The filter structure of the circulation adapter according to the present invention includes a main body provided with an opening that can be attached to the bathtub-side surface of the circulation adapter and can suck in hot water, and a filter that covers the opening of the main body. .

In the first aspect of the present invention, the main body portion has a plurality of reinforcing ribs that traverse the inside of the opening and are disposed to face the filter portion, and each of the reinforcing ribs has a gap between the filter portion. It is formed.

According to the first aspect of the present invention, since the plurality of reinforcing ribs that cross the inside of the opening of the main body portion and face the filter portion are provided, the filter strength can be ensured. In addition, since each reinforcing rib forms a gap with the filter portion, hot water can pass through the filter portion region facing the reinforcing portion, and the effective filter area can be increased.

The invention according to claim 2 is the invention according to claim 1, wherein the circulation adapter includes an operation part for changing a circulation path of hot water formed in the bathtub-side surface region, and a suction port for sucking hot water, Comprises a first opening formed to surround the operation portion and a second opening formed to surround the suction port, and the plurality of reinforcing ribs include the second opening. It is arranged to face the filter part covering the part.

According to the first aspect of the present invention, the effective area of the filter can be increased while ensuring the strength of the filter. In other words, despite the fact that a plurality of reinforcing ribs are formed on the main body, each reinforcing rib has a gap between it and the filter, so that the entire filter can be used as a hot water passage, and local foreign matter adheres. Can be prevented. Moreover, since the whole filter is used as the hot water passage, the flow rate of the hot water passing through the filter portion can be reduced, and adhesion of foreign matter to the filter portion itself can be reduced. In addition, since the reinforcing ribs and the filter portion are separated from each other, it is possible to prevent the occurrence of foreign matter sandwiched between them.

According to a second aspect of the present invention, the circulation adapter has an operation portion, and the plurality of reinforcing ribs are arranged to face the filter portion covering the second opening, so that the filter portion can be made large. Even if there is no filter, the effective area of the filter can be secured.

BRIEF DESCRIPTION OF THE DRAWINGS It is whole explanatory drawing of the bath hot-water supply system of an Example. It is a front view of the circulation adapter which concerns on a present Example. It is a figure which shows the III-III line cross section in FIG. It is a figure which shows the IV-IV sectional view in FIG. It is a figure which shows the VV sectional view in FIG. It is a perspective view of the switching valve case which concerns on a present Example. It is a front view of the switching valve case which concerns on a present Example. It is a figure which shows the VIII-VIII sectional view taken on the line in FIG. It is a perspective view of the guide member which concerns on a present Example. It is a front view of the guide member which concerns on a present Example. It is a figure which shows the XI-XI line cross section in FIG. It is a rear view of the guide member which concerns on a present Example. It is a front view of the filter which concerns on a present Example. It is a figure which shows the XIV-XIV line cross section in FIG. It is principal part sectional drawing of the filter which concerns on a present Example. It is a perspective view of the filter main-body part which concerns on a present Example. It is a front view of the filter main-body part which concerns on a present Example. It is a side view of the filter main-body part which concerns on a present Example. It is a perspective view of the filter part which concerns on a present Example. It is a front view of the filter part which concerns on a present Example. It is a side view of the filter part which concerns on a present Example. It is explanatory drawing of bubble operation mode.

  Hereinafter, the best mode for carrying out the present invention will be described based on examples.

  As shown in FIG. 1, the bath supply system of the embodiment includes a bathtub 1, a bath water heater 2, a circulation circuit 3, and a circulation adapter 4. The bath water heater 2 includes a first heat supply unit 5 for hot water supply composed of a combustion unit for gas and the like, a heat exchange unit, a second heat supply unit 6 for bath bathing, and a pump 7 for circulating water and hot water. Each device is controlled by a controller 8.

In addition, the controller 8 is electrically connected to the operation panel 9, and when the user presses a push button provided for each operation mode installed on the operation panel 9, a hot water bath instruction and various operation modes are provided. The selection signal is transmitted to the controller 8 and the operation of the bath water heater 2 is started.

A water and hot water distribution circuit related to the first heat supply unit 5 for hot water supply will be described. After the water introduced into the introduction path 10 is supplied to the first heat supply unit 5 through the first flow rate sensor 11, it is heated by the first heat supply unit 5. The heated hot water is a path that is supplied to the bathtub 1 and other hot water supply system devices through the discharge path 12.

  A circulation circuit of water and hot water related to the second heat supply unit 6 for bath remedy will be described. The circulation circuit 3 includes a return path 13 and a forward path 14. The hot water of the bathtub 1 sucked from the circulation adapter 4 by the operation of the pump 7 is heated by the second heat supply unit 6 through the return path 13 and is supplied to the bathtub 1 from the circulation adapter 4 through the forward path 14. . A second flow rate sensor 15 is provided in the return path 13 downstream of the pump 7, and the heating operation of the second heat supply unit 6 is not performed if there is no hot water flow rate of 3.5 L / min or more from the viewpoint of safety. The discharge path 12 and the return path 13 are connected by a branch discharge path 16, and the communication is controlled by an electromagnetic valve 17.

Next, the circulation adapter 4 will be described with reference to FIGS.
2 is a front view of the circulation adapter 4, FIG. 3 is a sectional view taken along line III-III in FIG. 2, FIG. 4 is a sectional view taken along line IV-IV in FIG. .

  The circulation adapter 4 is a first tubular body 18 disposed outside the bathtub 1 and a first tubular body 18 which is disposed through the bathtub wall from the inner side of the bathtub 1 and is screwed into the first tubular body 18. It has two cylindrical bodies 19. The first and second cylindrical bodies 18 and 19 have a first flange portion 18a and a second flange portion 19a, respectively, and the sealing properties between the bathtub wall and the flange portions 18a and 19a are secured by the annular packings 20 and 21. is doing.

On the inner peripheral side of the second cylindrical body 19, a metal switching valve case 23 that is fixed to the second flange portion 19 a by a bolt 22 is disposed. The surface of the switching valve case 23 is provided with a bubble jet outlet 24 and a suction opening 25 that open in the horizontal direction, and a side hole-shaped follow-up jet outlet 26 described later is formed toward the tank bottom. Yes. A mesh-like filter 27 is attached to the surface of the circulation adapter 4 on the bathtub side so as to cover the second flange portion 19 a and the switching valve case 23.

The end wall portion 28 of the first cylindrical body 18 is formed with three port portions of a suction pipe 29, a discharge pipe 30 and an intake pipe 31. The suction pipe 29 is a return path 13, and the discharge pipe 30 is a forward path 14. Are connected to each other. The intake pipe 31 is connected to an intake unit (not shown) having a filter, an orifice, a check valve and the like via an intake pipe.

As shown in FIGS. 6-8, the switching valve case 23 is continuously formed on the disk-shaped first switching valve portion 23a disposed on the bathtub side wall surface and the back surface of the first switching valve portion 23a and the first. It comprises a cylindrical second switching valve portion 23b having a smaller diameter than the switching valve portion 23a. 8 is a cross-sectional view taken along line VIII-VIII in FIG.

  On the surface of the first switching valve portion 23 a, a recessed first suction portion 81, a tapered bubble jet outlet 24, a first recess 51, and a second recess 52 having a larger diameter than the first recess 51 are provided. And a pair of bolt holes 23c arranged symmetrically with respect to the axial center, three cutout portions 23d and three elliptical openings formed in the outer peripheral edge portion of the first switching valve portion 23a.

The first suction portion 81 has a fan shape when viewed from the front, and is configured such that a main portion of the fan continues to the suction port 25 and expands from the axial center of the first switching valve portion 23a toward the outer peripheral direction. . Inside the first switching valve portion 23a, a linear memorial jet outlet 26 connected to the downstream end of a supply chamber 38, which will be described later, extends from the axis of the first switching valve portion 23a toward the outer circumferential direction. Is formed.

3-5, the 2nd switching valve part 23b made into the same axial center as the 1st switching valve part 23a is the outer cylinder part 32 fitted to the internal peripheral surface of the 2nd cylindrical body 19, and The inner cylinder part 33 which forms a plurality of functional spaces in cooperation with the outer cylinder part 32 is provided. That is, there are five functional spaces in the switching valve case 23, that is, the swirl chamber 34, the suction chamber 35, the swirl reserve chamber 37, the supply chamber 38, and the suction chamber 39 due to the outer tube portion 32 and the inner tube portion 33. Yes.

The swirl chamber 34 includes a metal intake nozzle portion 40 and a communication passage opening 41 that are fitted with an O-ring interposed. The intake nozzle portion 40 is formed coaxially with the axis of the swirl chamber 34 and is formed at the tip of the shaft center of the protrusion 42 and a columnar protrusion 42 that protrudes into the swirl chamber 34 toward the bubble jet outlet 24. And an annular recess 44 that is located around the proximal end of the projecting portion 42 and is formed in a projecting semicircular shape outward in the axial direction of the swirl chamber 34. . The intake inlet 43 is connected to an intake communication passage 45 that communicates with the intake pipe 31.

The suction chamber 35 has a suction port 25 at the end on the bathtub side. The swirl preliminary chamber 37 is arranged in parallel with the swirl chamber 34, and both chambers are connected by a communication path 36 that communicates in the tangential direction of the inner peripheral surface of the swirl chamber 34. A connecting portion between the communication path 36 and the swirl chamber 34 is a communication path opening 41. The supply chamber 38 communicates with the memorial jet outlet 26 at the end on the bathtub side. The suction chamber 39 is arranged in series on the side opposite to the bathtub with respect to the swirling preliminary chamber 37 and the supply chamber 38. Further, the swirl chamber 34, the suction chamber 35, the swirl reserve chamber 37, the supply chamber 38, and the suction chamber 39 are all arranged in parallel to the axis of the circulation adapter 4.

  With this configuration, hot water supplied from the swirl preliminary chamber 37 swirls at high speed along the inner peripheral shape of the swirl chamber 34, which is suitable for air suction, bubble miniaturization, generation of ultrasonic waves of a predetermined frequency, and the like. Swivel rotation speed can be obtained.

  As shown in FIG. 4, the switching valve case 23 has an outlet switching member 47 that passes through the inner cylinder portion 33 and controls the hot water outlet to be switched between a bubble jet outlet 24 and a memorial jet outlet 26. Is provided. The outlet switching member 47 is attached to a valve shaft 49 that is slidably supported by a receiving portion 48 formed in the inner cylinder portion 33 at the center portion, and an end portion on the opposite bathtub side that is one end side of the valve shaft 49. The first switching valve 50, the second switching valve 53 installed on the other end side across the first switching valve 50 and the receiving portion 48, the bathtub side end of the valve shaft 49 that is the other end side from the second switching valve 53 It comprises a hemispherical bearing member 54, a bias spring 55, and a shape memory alloy spring 56 fixed to the portion.

Next, based on FIGS. 9-12, the guide member 59 with which the surface of the 1st switching valve part 23a is mounted | worn is demonstrated. 9 is a perspective view of the guide member 59, FIG. 10 is a front view, FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. 10, and FIG. The resin guide member 59 constitutes a so-called circulation adapter main body side wall on the inner side of the filter 27 and on the bathtub side of the switching valve case 23, and the bolt 22 penetrates the switching valve case 23, and the second Fastened to the tubular body 19.

The guide member 59 includes a first jet opening 60a provided on the outer periphery of the bubble jet outlet 24, and a tapered portion 60b having a circular shape when viewed from the front, formed in a tapered shape in cross section that expands from the first jet opening 60a toward the bathtub side. , An arcuate groove portion 61 formed along a region below the tapered portion 60b, a first engagement hole 63 formed at an upper position of the taper portion 60b and engageable with a jet guide member 62 described later, an arcuate groove portion The second engagement hole 64 is formed at a lower position 61 and engageable with the jet guide member 62.

Furthermore, the guide member 59 includes a first protrusion 66 that can be engaged with a sliding member 65, which will be described later, at a right end position, a second protrusion 67 that can be engaged with the sliding member 65, at a left end position, and a guide. A suction end that forms an arc-shaped opening provided on the outer peripheral side of the second suction portion 82 in the radial direction of the second suction portion 82 and the second suction portion 82 that is formed on the back surface of the member 59 and forms the partition wall of the bathtub-side end of the first suction portion 81. A pair of ribs 83, a lattice-shaped crosspiece 83 a that divides the suction end 83 into six small openings, and protrudes toward the bathtub corresponding to the bolt holes 23 c and symmetrically arranged with respect to the axis. The bolt boss portion 59a, three cutout portions 59b formed at the outer peripheral edge portion of the guide member 59, and three elliptical openings are formed.

With the above-described configuration, the suction chamber 35 having the suction port 25 is arranged in parallel with the axis of the circulation adapter 4, and the suction end 83 is further further than the suction port 25 with respect to the axis of the circulation adapter 4. They are arranged offset in the outer circumferential direction. Further, the cutout portion 59b and the cutout portion 23d are configured to be positioned so that the cutout shapes match when assembled. Furthermore, even when the filter 27 is removed, it is possible to prevent finger filling or the like into the suction port 25 by the lattice-shaped crosspiece 83a.

The arc-shaped groove 61 has a substantially U-shaped cross section composed of a bottom surface 68, an upper wall 69, a lower wall 70, and side walls 71, 72 that are orthogonal to the valve shaft 49 on the opposite bathtub side, that is, substantially parallel to the adapter body side wall. The sliding member 65 having a rectangular cross section guided by the bottom 68, the upper wall 69, and the lower wall 70 is slidably accommodated in the recess. A substantially central portion of the bottom surface 68 of the arc-shaped groove portion 61 is formed with a through-opening 61a that supports the other end portion of the valve shaft 45 and allows the valve shaft 49 to pass through in an axially slidable manner.

As shown in FIG. 4, the sliding member 65 includes an arcuate through-hole 79 formed in a substantially arc shape that penetrates the other end side portion of the valve shaft 49 so that the sliding member 65 can move in the left-right direction. An inclination formed around the arcuate through-hole 79, slidable to the bearing member 54 and inclined with respect to a surface orthogonal to the valve shaft 49, a so-called bottom surface 68, and in contact with the bearing member 54 with a semicircular cross section. It consists of the part 73 and the operation part 74 extended toward the bathtub side at the sliding member 65 left side edge part.

The inclination part 73 is comprised so that the height from the bottom face 68 with respect to the bathtub side may become so high that it goes to the right side. That is, when the operation unit 74 is manually operated to the right end position, the sliding member 65 slides to the right in the arc-shaped groove 61, and the bias spring 55 is stronger than the tension of the shape memory alloy spring 56. The bearing member 54 that is in sliding contact with the inclined portion 73 moves along the inclined portion 73 toward the opposite bathtub side.

On the other hand, when the operation unit 74 is manually operated to the left end position, the sliding member 65 slides to the left in the arc-shaped groove 61, and the bias spring 55 is stronger than the tension of the shape memory alloy spring 56. The bearing member 54 that is in sliding contact with the inclined portion 73 moves toward the bathtub along the inclined portion 73.

Therefore, when the bearing member 54 is in sliding contact with the inclined portion 73, the height of the inclined portion 73 from the bottom surface 68 with respect to the bathtub side is as shown in FIGS. When manually operated, the valve shaft 49 is in the first position where the second switching valve 53 is closed and the first switching valve 50 is opened, and when the operating portion 74 is manually operated to the left end position, the valve shaft 49 is Is set to the second position where the second switching valve 53 is opened and the first switching valve 50 is closed.

  Even when the operation unit 74 is manually operated to the right end position, when the hot water temperature becomes high, the shape memory alloy spring 56 expands in response to the temperature change and the bias spring 55 is compressed. Therefore, the bearing member 54 is separated from the inclined portion 73 and slides and moves to the bathtub side, and the valve shaft 49 is configured to be in the second position where the second switching valve 53 is opened and the first switching valve 50 is closed. Has been.

  A recess (not shown) that can be engaged with the first projection 66 and the second projection 67 is formed on the bottom surface of the operation unit 74 on the adapter body side, and the operation unit 74 is positioned at the right end position or the left end position. When manually operated, the first protrusion 66 or the second protrusion 67 is engaged, so that the sliding member 65 can be positioned and a moderate feeling of moderation is given to the user.

As shown in FIGS. 2 to 5, the circular jet guide member 62 is coaxial with the axis of the circulation adapter 4, has a second jet opening 75 having the same diameter as the first jet opening 60 a, and a crescent-like shape. The operation opening 76, a first engagement portion 77 that engages with the first engagement hole 63, and a second engagement portion 78 that engages with the second engagement hole 64 are configured.

The second jet opening 75 allows the bubble jet flow along the trajectory from the bubble jet outlet 24 to pass substantially linearly, and the outer peripheral portion of the second jet opening 75 deviates from the outer peripheral portion of the bubble jet, so-called trajectory. It is configured to block the jet.

The outer edge side portion of the jet guide member 62 is connected to the guide member 59 by a first engagement portion 77 and a second engagement portion 78. Further, a partly spaced space is formed between the guide member 59 and the jet guide member 62 on the outer edge side portion of the jet guide member 62, and the bubble opening mode is set by the operation opening 76 and the spaced space on the outer edge side portion. At this time, the hot water flow can be recirculated from the outside of the jet guide member 62 to the bubble jet outlet 24.

  As shown in FIGS. 13 to 21, the filter 27 includes an annular filter main body portion 84 (main body portion) and a mesh portion 85 (filter portion) made of a stainless steel mesh disposed on the outer edge of the filter main body portion 84. It is composed. 13 is a front view of the filter 27, FIG. 14 is a cross-sectional view taken along the line XIV-XIV in FIG. 13, FIG. 15 is a cross-sectional view of the main part of the filter 27, and FIGS. A front view, a side view, and FIGS. 19 to 21 show a perspective view, a front view, and a side view of the mesh portion 85, respectively.

  As shown in FIGS. 16 to 18, the resin filter main body 84 includes an inner ring portion 87 that forms a circular central opening 86 (first opening) at the inner peripheral portion, and the outer periphery of the inner ring portion 87. A plurality of first rib portions 89 (reinforcing ribs) that are radially formed with respect to the axial center of the filter 27 while connecting the cylindrical outer tube portion 88, the inner ring portion 87, and the outer tube portion 88 disposed in The speed reducing portion 90 covers a predetermined area between the inner ring portion 87 and the outer tube portion 88.

  As shown in FIG. 15, the inner ring portion 87 includes an inner ring back surface portion 87 a that forms a rear side rear surface of the inner ring portion 87, an inner ring tip portion 87 b that forms a tip portion of the inner ring portion 87, and an inner ring tip portion. The inner ring step 87c is formed on the rear side in the axial direction on the outer periphery of the outer periphery 87b, and the second rib 87d is provided at the inner edge of the opening 86 and protruded from the inner ring back surface 87a. The second rib portion 87d is configured to contact the surface of the bolt boss portion 59a.

  The outer cylindrical portion 88 has a convex engaging portion 88a provided on the inner peripheral surface, a wedge-shaped projection 88b provided on the outer peripheral side surface, and a memorial nozzle 88e. It is comprised so that it may become the same position as the surface of the ring step part 87c. The engaging portion 88a is configured so that the filter 27 can be attached to the switching valve case 23 by engaging with the notches 23d and 59b described above. Further, when the filter 27 is mounted on the switching valve case 23, the opening of the memorial jet outlet 26 and the memorial nozzle 88e are opposed to each other.

A plurality of first rib portions 89 are installed in an annular opening 91 (second opening) surrounded by the inner ring portion 87 and the outer tube portion 88. The arrangement position of the first rib portion 89 is the rear side of the inner ring step portion 87c and the front side of the inner ring back surface portion 87a in the axial direction. That is, a gap is formed between the front surface of the first rib portion 89 and the inner ring step portion 87c.

Similar to the first rib portion 89, the speed reduction portion 90 is installed in the annular opening 91 and is formed of an arc-shaped plate member having a plurality of holes that can communicate with each other. The deceleration unit 90 is formed at a position facing the suction end 83 when the filter 27 is mounted on the switching valve case 23. In addition, the hole of the deceleration part 90 is made larger than the mesh hole of the mesh part 85. FIG.

As shown in FIGS. 19-21, the mesh part 85 has a mesh-shaped front part 85a through which hot and cold water can pass, and a plurality of mesh bar parts 85b formed radially on the front part 85a so as to cross the mesh part. A cylindrical outer peripheral portion 85c that forms the side portion of the mesh portion 85, a mounting portion 85d that can be engaged with the protrusion 88b, and a rear end portion provided on the rear end portion of the outer peripheral portion 85c that is notched in the shape of the remedy nozzle 88e. It is comprised from the notch part 85e for scissors.

For example, the mesh portion 85 of this embodiment presses a cylindrical body whose one end is closed by pressing a stainless steel plate having a thickness of 0.6 mm. One end surface of the cylindrical body is etched to form a front portion 85a including a mesh having a minute hole and a mesh bar portion 85b.

The front portion 85 a is configured such that the inner peripheral portion back surface abuts on the surface of the inner ring step portion 87 c and the outer peripheral portion rear surface abuts on the surface in the axial direction of the outer cylinder portion 88. That is, a gap is formed between the front surface of the first rib portion 89 and the back surface of the front surface portion 85a. Moreover, the inner peripheral end portion of the front surface portion 85a is brought into contact with the side surface of the inner ring front end portion 87b, thereby preventing the cut portion generated by processing from being exposed to the surface.

Next, each operation mode will be described.
The circulation adapter 4 can execute three operation modes: a pouring operation mode, a chasing operation mode, and a bubble operation mode. The user can select one of the operation modes with a push button on the operation panel 9.

(Pouring hot water operation mode)
When the operation unit 74 is operated to the normal position (see FIG. 2) and the pouring operation mode is selected on the operation panel 9, water is introduced into the introduction pipe 10. The water moved to the first heat supply unit 5 is heated and then proceeds to the discharge pipe 12. At this time, the solenoid valve 17 is opened by the instruction of the controller 8 so that the hot water is led to the return path 13 via the branch discharge pipe 16 and a part of the hot water is introduced into the circulation adapter 4 from the return path 13. 25.

  The hot water discharged from the suction port 25 is first decelerated by the movement of the fan-shaped space composed of the first suction portion 81 and the second suction portion 82. The hot water that has passed through the suction end 83 is subjected to a second deceleration by the lattice-shaped crosspiece 83a. Furthermore, since the deceleration part 90 prevents the progress of hot water, 3rd deceleration is performed. Thereby, it becomes possible to supply hot water with attenuated momentum to the bathtub 1. Note that hot water is supplied from the suction port 25 only in the pouring operation mode.

On the other hand, the remaining hot water is introduced into the suction chamber 39 through the forward path 14. The hot water introduced into the suction chamber 39 has the first switching valve 50 shut off the route to the swirl reserve chamber 37 and the second switching valve 53 is opened. After passing through the two recesses 52, it is sent to the chasing jet outlet 26 facing downward in the bathtub. Thus, the hot water is poured into the bathtub.

(Bubble operation mode)
As shown in FIG. 22, when the operation unit 74 is operated to the bubble position (see FIG. 2) and the bubble operation mode is selected on the operation panel 9, the controller 8 operates the pump 7. Hot water that has passed through the filter 27 is introduced into the return path 13 from the suction port 25 through the suction chamber 35. At this time, the second heat supply unit 6 is not operating, and hot water circulates at the temperature introduced into the return path 13 and is introduced into the suction chamber 39 through the forward path 14.

Since the plurality of first rib portions 89 are provided between the inner ring portion 87 and the outer cylinder portion 88, the strength of the filter 27 is ensured. Further, since a gap is formed between the front surface of the first rib portion 89 and the back surface of the front surface portion 85a, the effective area of the front surface portion 85a through which hot water can pass can be expanded, so the flow rate of hot water toward the suction port 25 is increased. It can reduce, and the foreign material adhering to the front part 85a can be reduced. Moreover, it can prevent that hair is pinched between the front part 85a and the 1st rib part 89 like a conventional product, and the cleaning property of the filter 27 improves.

  Hot water that has entered the preliminary swirl chamber 37 from the suction chamber 39 passes through the communication passage 36 and is introduced into the swirl chamber 34 through the communication passage opening 41. Since the communication path 36 is connected in the tangential direction of the swirl chamber 34, the hot water swirls around the central axis in the longitudinal direction of the swirl chamber 34, and a predetermined negative pressure is generated in the swirl chamber 34. The air sucked by the negative pressure is sucked into the central portion of the swirl chamber 34 from the intake communication passage 45 and mixed with hot water, and the bubble mixed hot water is ejected from the bubble jet outlet 24 that opens in the horizontal direction while swirling. .

In particular, hot water having a slow flow rate compared to the flow rate of hot water flowing through the suction port 25 is opposed to the suction end portion 83 having the largest flow path area among the suction portions formed by the first and second suction portions 81 and 82. Since it passes through the area of the front portion 85a, it is possible to prevent the foreign matter from being concentrated on the mesh portion 85. In addition, since the suction port 25 is arranged in the fan-shaped main parts of the first and second suction parts 81 and 82 that are fan-shaped, and the suction end 83 is arranged in the arc part, the hot water channel shape is axially oriented. As a result, the crank shape can be obtained, and the flow velocity can be effectively reduced.

Furthermore, since the second rib portion 87d is provided, the distance between the front surface portion 85a and the suction end portion 83 can be made uniform, the concentration of foreign matters can be prevented, and the distance between the front surface portion 85a and the suction end portion 83 can be separated. Therefore, the flow velocity can be further reduced.

(Mourning mode)
When the operation unit 74 is operated to a normal position (see FIG. 2) and the memorial operation mode is selected on the operation panel 9, the pump 7 and the second heat supply unit 6 start to operate according to instructions from the controller 8, and the inside of the bathtub Hot water is introduced into the return path 13 through the suction port 25. The hot water heated by the second heat supply unit 6 is introduced into the suction chamber 39 through the forward path 14. The path after the suction chamber 39 is the same as in the pouring operation mode.

(Safety device function)
Finally, the safety device function will be described. When the operation unit 74 is operated to the bubble position and the memorial operation mode is selected on the operation panel 9, the pump 7 and the second heat supply unit 6 start to operate according to an instruction from the controller 8, and the hot water in the bathtub is sucked in. 25 to the return path 13. The hot water heated by the second heat supply unit 6 is introduced into the suction chamber 39 through the forward path 14.

Initially, since the bearing member 48 is in sliding contact with the inclined portion 73, the valve shaft 49 is in the first position where the second switching valve 53 is closed and the first switching valve 50 is opened. The spring 56 is extended to switch the valve shaft 49 to a second position, that is, a state in which the so-called bearing member 54 and the inclined portion 73 are separated from each other, and hot hot water is guided to the memorial jet outlet 26.

Next, a modification in which the above embodiment is partially changed will be described.
1] In the above embodiment, an example of a filter attached to a circulation adapter capable of realizing three operation modes has been described. However, at least if the circulation adapter has a suction port for sucking hot water in a bathtub, the filter of the present invention Structure can be applied.

2] In addition, those skilled in the art can implement the present invention in various forms added with various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

  INDUSTRIAL APPLICATION This invention can be utilized for the filter of the circulation adapter used by attaching to a bathtub in order to supply hot water to a bathtub, and is especially suitable for the filter structure where the increase in a filter effective area is requested | required.

DESCRIPTION OF SYMBOLS 1 Bathtub 4 Circulation adapter 25 Suction port 27 Filter 74 Operation part 83 Suction end part 84 Filter main-body part (main-body part)
85 mesh part (filter part)
85a Front part 86 Center opening 87 Inner ring part 88 Outer cylinder part 89 First rib part 91 Annular opening part

Claims (2)

In the filter structure of the circulation adapter, which has a main body portion provided with an opening capable of sucking hot water and being attached to the bathtub side surface of the circulation adapter, and a filter portion covering the opening of the main body portion,
The main body has a plurality of reinforcing ribs disposed across the opening and facing the filter.
A filter structure of a circulation adapter, wherein a gap is formed between each of the reinforcing ribs and the filter portion. The circulation adapter includes an operation unit that changes a circulation path of hot water formed in the bathtub-side surface region, and a suction port that sucks in hot water.
The main body includes a first opening formed so as to surround the operation portion, and a second opening formed so as to surround the suction port.
The filter structure of the circulation adapter according to claim 1, wherein the plurality of reinforcing ribs are arranged to face the filter portion covering the second opening.