JP5332638B2 - Circulation adapter - Google Patents

Description

  The present invention relates to a circulation adapter used by being attached to a bathtub to supply hot water from a bath water heater to the bathtub, and more particularly to a circulation adapter having a bubble jet outlet for jetting a bubble jet.

  Conventionally, a bath water heating system for a bathtub has a hot water operation mode in which new hot water is supplied from the bath water heater, a reheating operation mode in which the hot water in the bathtub is returned to the water heater again, and reheated. A variety of hot water supply modes are available to meet consumer needs such as a bubble operation mode in which bubbles are mixed in hot water and a bubble jet is ejected, and an ultrasonic operation mode in which ultrasonic vibration is applied to the hot water and ejected. ing.

  In operation modes other than the pouring operation mode such as the memorial operation mode, hot water is sucked from the bathtub and the hot water is forcedly circulated. A mesh-like filter is installed on the surface of the suction port to increase the filtration efficiency. If this filter is clogged with foreign matter in the bathtub, the flow resistance is increased and the circulation efficiency is lowered. When the value falls below the reference value, the safety device may be activated to stop the operation of the water heater.

  Patent Document 1 is a circulation adapter capable of a memorial operation mode, in which a concave opening is provided between an external filter on the adapter surface attached to the adapter body and a suction port disposed to face the external filter. A technique has been proposed in which an internal filter larger than the opening area of the suction port is provided in the opening.

  In Patent Document 1, since two filters of an external filter and an internal filter are used, the mesh of the external filter can be made coarser than before, and a hot water flow rate that can be forcibly circulated can be secured. Moreover, the pressure difference before and behind the internal filter can be reduced, and suction of foreign matter into the adapter can be prevented.

JP 2004-301472 A

  Depending on the operation mode, there is a demand for directing a jet flow of a predetermined pressure with the hot water jet direction directed to the user himself / herself. In particular, in the bubble operation mode, since the bubble jet nozzle has a small diameter, the flow path resistance of the hot water is large even in a normal use state. Moreover, since the bubble jet outlet is disposed in the front area of the adapter, there is a problem that the filter surface area through which hot water can pass cannot be sufficiently secured and the flow path resistance further increases.

  When the filter and the suction port are arranged facing each other in order to reduce the flow path resistance of the hot water, the flow area of the hot water passing through the so-called front projection area is a region other than the front projection area. Compared to Due to this increase in flow velocity, the adhesion of foreign matters to the front projection area is concentrated and clogging occurs in that area, resulting in a vicious circle in which the flow resistance further increases.

  In addition, in the circulation adapter having a plurality of operation modes, since the adapter body needs to be made compact, the distance between the filter and the suction port is more closely arranged on the layout, and the front surface directly opposite to the suction port. The flow rate of hot water passing through the filter in the projection area tends to be higher.

  As proposed in Patent Document 1, it is conceivable to provide two filters inside and outside. However, when a sufficient filter surface area cannot be secured, the flow resistance is increased conversely. Since a new filter is required, the number of parts increases and compactness deteriorates.

  An object of the present invention is to provide a circulation adapter capable of preventing clogging of a filter while maintaining compactness in a circulation adapter capable of bubble operation.

  The circulation adapter according to the present invention is capable of sucking hot water from a bubble jet outlet for ejecting a bubble jet in the bubble operation mode, a bubble jet passage communicating with the bubble jet outlet, and a bathtub in the bubble operation mode. It has a suction part, a suction channel connected with this suction part, and a filter installed around the bubble jet outlet.

The invention of claim 1 is provided with a guide member having a suction end portion arranged to face the filter while arranging the bubble jet outlet, and the suction portion extends from the suction flow path end portion to the suction end portion. The flow path area is configured to increase as it goes, and the suction section has a fan-shaped cross section, and the suction flow path end is formed in the fan-shaped main part, and the suction end is the fan-shaped. It is formed in the circular arc part of shape .

  In the first aspect of the present invention, the flow area increases from the suction flow path end toward the suction flow end, so the hot water flow rate at the suction flow end can be made slower than the hot water flow rate at the suction flow path end. . In addition, since the flow path area of the suction end that is disposed opposite to the filter is increased, the filter surface area through which hot water can pass can be increased.

The invention of claim 2 is characterized in that, in the invention of claim 1 , the center of the filter is arranged on the same straight line as the center of the guide member.

The invention of claim 3 is the invention of claim 1 or 2 , wherein a memorial jet outlet that ejects a memorial jet in the memorial operation mode, and a memorial jet flow passage communicating with the memorial jet outlet, And a jet flow channel selection means for alternatively selecting the memorial jet flow channel and the bubble jet flow channel, and the guide member is a manual operation capable of switching both the jet flow channels by manual operation. It has the member.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the suction flow path is installed such that the axis of the suction flow path is parallel to the axis of the circulation adapter body. In addition, the suction end portion is installed offset in the outer circumferential direction with respect to the axis of the suction flow path.

The invention of claim 5 is the invention of any one of claims 1-4, the predetermined distance forward from the front end of the bubble jet spout, an opening for passing the bubble jet substantially straight, the bubble jet It has a scattering prevention board which has a blockade which covers the perimeter side of this.

  According to the invention of claim 1, it is possible to prevent clogging of the filter while maintaining compactness. In other words, hot water with a slow flow rate compared with the flow rate of hot water flowing through the suction flow path end passes through a region facing the suction end, that is, a so-called front projection region of the filter facing directly in front, so that foreign matter concentrates on the filter. Can be prevented. Moreover, since the flow path area of the suction end is increased from the suction flow path end, the front projection area facing the suction end can be enlarged, and the hot water with a slow flow rate is sucked through the wide area of the filter. It becomes possible to introduce into the flow path. Furthermore, it is only a configuration change of the hot water channel from the suction channel end to the suction end, and no separate member is required.

In addition , the suction channel end is formed in the fan-shaped main portion of the suction portion, and the suction end is formed in the arc portion of the suction portion, so compared to the flow rate of hot water flowing through the suction channel end. Hot water with a low flow rate can be formed. In addition, hot water with a low flow rate can pass through the filter region facing the suction end provided in the arc portion of the fan-shaped suction portion where the flow path area is maximized, and foreign matter is concentrated on the filter. Adhesion can be prevented.

According to the invention of claim 2 , since the center of the filter is arranged on the same straight line as the center of the guide member, the filter can be removed by an operation in the rotation direction with respect to the filter, and the maintenance property is excellent.

According to the invention of claim 3 , since the guide member has the manual operation member capable of switching both jet flow paths by manual operation, the filter can be installed even when the filter surface area through which hot water can pass is extremely small. The passing hot water speed can be reduced effectively, and foreign matter can be prevented from adhering to the filter.

According to the invention of claim 4 , since the suction end portion is installed offset in the outer peripheral direction with respect to the axial center of the suction flow path, the suction portion is formed using the region in the outer peripheral direction of the adapter body. It can be made compact without enlarging the adapter body in the bathtub direction.

According to the invention of claim 5, the anti-scattering plate having an opening for allowing the bubble jet to pass substantially straight forward from a front end of the bubble jet outlet and a closing portion covering the outer peripheral side of the bubble jet. Therefore, it is possible to prevent foreign matter from adhering to the filter while preventing scattering of hot water during the bubble operation mode.

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 side view of the circulation adapter which concerns on a present Example. 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 figure which shows the VI-VI line cross section 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 IX-IX line cross section 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 XII-XII 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 member which concerns on a present Example. It is a figure which shows the XV-XV sectional view in FIG. It is principal part sectional drawing of the filter member 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 side view of the circulation adapter 4 as viewed from the left, FIG. 4 is a sectional view taken along line IV-IV in FIG. Shows a cross-sectional view taken along line VI-VI 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. 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 (suction flow path end) that open in the horizontal direction, and a horizontal hole-shaped follow-up jet described later toward the tank bottom. A spout 26 is formed. A mesh-like filter member 27 is mounted on the bathtub-side surface portion of the circulation adapter 4 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. 7-9, the switching valve case 23 is continuous with the disk-shaped 1st switching valve part 23a arrange | positioned at the bathtub side wall surface, and the back surface of the 1st switching valve part 23a, and is 1st switching. It comprises a cylindrical second switching valve portion 23b having a smaller diameter than the valve portion 23a. 9 is a cross-sectional view taken along the line IX-IX in FIG.

  On the surface of the first switching valve portion 23 a, the switching valve case 23 is connected to the second cylinder by a recessed first suction portion 81, a tapered bubble jet outlet 24, a second recess 52 described later, and a bolt 22. A pair of bolt holes 23c fixed to the body 19 and arranged symmetrically with respect to the axial center, three notches 23d and three arc-shaped openings formed in the outer peripheral edge of the first switching valve portion 23a. It is formed. 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.

  As shown in FIGS. 4-6, 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. In other words, the outer cylinder portion 32 and the inner cylinder portion 33 have a cylindrical swirl chamber 34 provided with a bubble jet outlet 24 and a suction chamber 35 (suction channel) provided with a suction port 25 inside the switching valve case 23. Further, as will be described later, a swirling preliminary chamber 37 that is arranged in parallel with the swirling chamber 34 and connected to the swirling chamber 34 by a communication path 36, and is arranged in parallel with the swirling preliminary chamber 37 and the memorial jet outlet 26. There are five functional spaces of a suction chamber 39 arranged in series on the side opposite to the bathtub with respect to the supply chamber 38 and the swirl reserve chamber 37 and the supply chamber 38 that can communicate with each other. 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.

  The swirl chamber 34 is provided with an intake nozzle 40 having a conical shape at the end on the bathtub side. An intake hole 41 that communicates with the intake pipe 31 is provided inside the intake nozzle 40, and the air introduced from the intake hole 41 is directed toward a communication passage opening 42 provided at a central portion in the longitudinal direction of the swirl chamber 34. Configured to supply.

  As shown in FIGS. 5 and 6, the communication path 36 communicates with the columnar swirl chamber 34 so that the connection direction is a tangential direction. 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. The circulation adapter 4 is configured to have a rotational speed of 30,000 to 40,000 revolutions / minute. A check ball 80 as a check valve is installed in the swirl preliminary chamber 37, and only the flow of hot water from the suction chamber 39 is allowed.

  As shown in FIG. 5, the switching valve case 23 penetrates the inner cylinder portion 33 and is controlled to switch the hot water outlet to the bubble jet outlet 24 and the memorial jet outlet 26. (Jet flow channel selecting means) is provided. The spout switching member 43 is attached to a valve shaft 45 that is slidably supported by a receiving portion 44 formed in the inner cylinder portion 33 at the center portion, and a countertub-side end portion that is one end side of the valve shaft 45. The first switching valve 46, the second switching valve 47 installed on the other end side across the first switching valve 46 and the receiving portion 44, the bathtub side end of the valve shaft 45 that is the other end side from the second switching valve 47. It comprises a hemispherical bearing member 48 fixed to the part.

  The first switching valve 46 includes a blocking portion 49 that controls the communication state between the swirling preliminary chamber 37 and the suction chamber 39, and a communication portion that is provided in parallel with the blocking portion 49 and that allows the suction chamber 39 and the supply chamber 38 to always communicate with each other. And 50. The second switching valve 47 enables the supply chamber 38 and the follow-up jet outlet 26 to communicate with each other, and allows the first concave portion 51 having a smaller diameter and a cylindrical shape than the second switching valve 47 to be opened and closed. In addition, a second recess 52 having a larger diameter than the first recess 51 is integrally formed in the first switching valve portion 23 a on the bathtub side of the first recess 51. The valve shaft 45 includes a first support portion 53 and a second support portion 54 formed on the suction chamber 39 side.

  A bias spring 57 is disposed between the first receiving seat 55 and the first supporting portion 53 provided in the receiving portion 44, and the second supporting portion 54 and the second receiving seat 56 fixed to the inner cylinder portion 33 are arranged. A shape memory alloy spring 58 is disposed between them. The tension between the bias spring 57 and the shape memory alloy spring 58 is balanced, and the position of the outlet switching member 43, that is, the state of the so-called first switching valve 46 and second switching valve 47 is the shape memory alloy spring. As long as the tension of 58 does not change, it does not change. The positional relationship between the first switching valve 46 and the second switching valve 47 is such that when the second switching valve 47 closes the first recess 51, the blocking portion 49 of the first switching valve 46 opens, and conversely The second switching valve 47 is configured to open when the shut-off portion 49 closes the swivel reserve chamber 37.

  More specifically, when the hot and cold water is at a low temperature or normal temperature, the shape memory alloy spring 58 is in a contracted state. At this time, since the second switching valve 47 closes the first recess 51 and the blocking portion 49 is open, hot water is supplied to the swirl chamber 34 via the swirl preliminary chamber 37 and the communication path 36. Next, when high-temperature hot water, for example, 50 ° C. hot water is supplied into the circulation adapter 4, the shape memory alloy spring 58 expands in response to the temperature change, and the bias spring 57 is compressed and the second switching valve is compressed. 47 opens and the shut-off part 49 closes.

  Next, the guide member 59 attached to the surface of the first switching valve portion 23a will be described with reference to FIGS. 10 is a perspective view of the guide member 59, FIG. 11 is a front view, FIG. 12 is a cross-sectional view taken along line XII-XII of FIG. 11, and FIG. The resin guide member 59 constitutes a so-called circulation adapter main body side wall on the inner side of the filter member 27 and on the bathtub side of the switching valve case 23, and the bolt 22 penetrates the switching valve case 23, and The two cylindrical bodies 19 are fastened.

  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 second suction portion 82 that is formed on the back surface of the member 59 and forms a partition wall at the end of the bathtub of the first suction portion 81, an arcuate suction end portion 83 that is provided on the radially outer peripheral side of the second suction portion 82, and a bolt A pair of bolt bosses 59a that are provided so as to protrude toward the bathtub and correspond to the hole 23c and are arranged symmetrically with respect to the axial center, three notches 59b formed on the outer peripheral edge of the guide member 59, and three It consists of an arcuate opening.

  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. The fan-shaped space formed by the first suction portion 81 and the second suction portion 82 corresponds to the suction portion of the present invention.

  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 45 on the opposite bathtub side, that is, substantially parallel to the adapter body side wall. A sliding member 65 having a rectangular cross section, which is 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 45 to slidably pass through in the axial direction. The sliding member 65 includes an arcuate through-hole 79 formed in a substantially arc shape that allows the sliding member 65 to pass through the other end portion of the valve shaft 45 so as to be movable in the left-right direction, and the periphery of the arc-shaped through-hole 79. An inclined portion 73 that is slidably contacted with the bearing member 48 and is inclined with respect to a surface orthogonal to the valve shaft 45, that is, a so-called bottom surface 68, and is semicircular in cross section and in contact with the bearing member 48; 65 It comprises from the operation part 74 (manual operation member) extended toward the bathtub side at the left end part.

  The inclination part 73 is comprised so that the height from the bottom face 68 with respect to the bathtub side may become high as 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 57 is stronger than the tension of the shape memory alloy spring 58. The bearing member 48 that is in sliding contact with the inclined portion 73 moves along the inclined portion 73 to 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 57 is stronger than the tension of the shape memory alloy spring 58. The bearing member 48 that is in sliding contact with the inclined portion 73 moves to the bathtub side along the inclined portion 73.

  Therefore, when the bearing member 48 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 FIG. 4 to FIG. When manually operated, the valve shaft 45 is in the first position where the second switching valve 47 is closed and the blocking portion 49 is opened, and when the operating portion 74 is manually operated to the left end position, the valve shaft 45 is moved to the first position. The second switching valve 47 is set to be in the second position where the valve is opened and the blocking portion 49 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 58 expands in response to the temperature change and the bias spring 57 is compressed. Therefore, the bearing member 48 is separated from the inclined portion 73 and slidably moves to the bathtub side, and the valve shaft 45 is configured to be in the second position where the second switching valve 47 is opened and the blocking portion 49 is closed. Yes.

  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.

  The circular jet guide member 62 (scattering prevention plate) is positioned at the same axial center as the axis of the circulation adapter 4, and has a second jet opening 75 (opening) having the same diameter as the first jet opening 60a and a crescent 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.

  The second jet opening 75 allows a bubble jet along the trajectory from the bubble jet outlet 24 to pass substantially linearly, and an outer peripheral portion (blocking portion) of the second jet opening 75 is an outer peripheral portion of the bubble jet, A so-called off-orbit jet is cut off.

  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. 14 to 16, the filter member 27 includes an annular filter main body portion 84 and a mesh portion 85 made of a metal mesh disposed on the outer edge of the filter main body portion 84. 14 is a front view of the filter member 27, FIG. 15 is a cross-sectional view taken along line XV-XV in FIG. 14, and FIG.

  The filter main body 84 includes a circular opening 86, a rib 87 installed at the back edge of the opening 86 every 90 °, an engagement 88 provided on the inner peripheral surface, and a protrusion provided on the outer peripheral surface. 89. The engaging portion 88 is configured so that the filter member 27 can be attached to the switching valve case 23 by engaging with the notches 23d and 59b described above.

  The rib portion 87 abuts against the surface of the bolt boss portion 59a in order to maintain a uniform and predetermined distance between the mesh portion 85 and the suction end portion 83 when the engaging portion 88 is engaged with the notches 23d and 59b. It is configured as follows. The mesh portion 85 includes a mesh-shaped front portion 85 a through which hot water can pass and an outer peripheral portion 85 b having an attachment portion 85 c that can be engaged with the protruding portion 89.

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. Note that hot water is supplied from the suction port 25 only in the pouring operation mode.

  The remaining hot water is introduced into the suction chamber 39 through the forward path 14. The shape memory alloy spring 58 installed in the suction chamber 39 expands in response to the temperature of the hot water introduced into the suction chamber 39 (for example, 50 ° C.), and the first switching valve 46 moves to the swivel reserve chamber 37. And the second switching valve 47 is opened. After passing hot water through the supply chamber 38, the first concave portion 51 and the second concave portion 52, the hot water 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. 17, 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 activates the pump 7 and sucks hot and cold water in the bathtub. 25 is introduced into the return path 13 through the suction chamber 35. At this time, the second heat supply unit 6 is not in operation, and hot water circulates at the temperature introduced in the return path 13 and is introduced into the suction chamber 39 through the forward path 14.

  Hot water entering the swirl preliminary chamber 37 from the suction chamber 39 passes through the communication path 36 and is introduced into the swirl chamber 34 from the communication path opening 42. 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 hole 41, mixed with hot water, and the bubble mixed hot water is ejected from the bubble jet outlet 24 that opens horizontally 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 rib portion 87 is provided, the distance between the front 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 portion 85a and the suction end portion 83 can be separated. The flow velocity can be further reduced.

  As described above, since the diameter B of the jet guide member 62 is smaller than the diameter A of the filter member 27 and both are made the same axis as the axis of the circulation adapter 4, when the filter member 27 is replaced, the jet guide The filter member 27 can be replaced without removing the member 62.

(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 45 is in the first position where the second switching valve 47 is closed and the blocking portion 49 is opened. 58 expands to switch the valve shaft 45 to a second position, that is, a state in which the so-called bearing member 48 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-described embodiment, an example in which three operation modes can be realized has been described. However, any operation mode including at least a bubble operation mode may be used, and two operation modes of a memorial operation mode and a bubble operation mode are provided. The circulation adapter of the present invention can also be applied to those provided or those provided with more operation modes.

2] Although the example of the circulation adapter having the jet guide member has been described in the above embodiment, the circulation adapter of the present invention can be applied to an adapter that does not include the jet guide member.

3) In addition, those skilled in the art can implement the present invention by adding various modifications to the embodiments without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

  INDUSTRIAL APPLICABILITY The present invention can be used for all circulation adapters provided with a bubble jet outlet for jetting a bubble jet.

DESCRIPTION OF SYMBOLS 1 Bathtub 4 Circulation adapter 24 Bubble jet outlet 25 Suction inlet 26 Remembrance jet outlet 27 Filter member 34 Turning chamber 38 Supply chamber 43 Jet outlet switching member 59 Guide member 62 Jet guide member 74 Operation part 75 2nd jet opening 81 1st 1 suction part 82 2nd suction part 83 Suction end part

Claims (5)

A bubble jet outlet for ejecting a bubble jet in the bubble operation mode, a bubble jet flow path communicating with the bubble jet outlet, a suction section capable of sucking hot water from the bathtub in the bubble operation mode, and the suction section A circulation adapter having a suction flow path communicated with and a filter installed around the bubble jet outlet,
A guide member having a suction end disposed to face the filter and the bubble jet outlet;
The suction portion is configured such that the flow channel area increases from the suction flow channel end toward the suction end ,
The suction part has a sector shape in cross section, the suction flow path end part is formed in the main part of the sector shape, and the suction end part is formed in the circular part of the sector shape. To recirculate adapter. The center of the filter, circulation adapter according to claim 1, characterized in that said disposed in the guide member of the center collinear. Select a memorial jet outlet that ejects memorial jets in the memorial operation mode, a memorial jet flow channel that communicates with the memorial jet jet port, the memorial jet flow channel, and the bubble jet flow channel. Jet flow channel selection means for selecting one,
The guide member is circular adapter according to claim 1 or 2, characterized in that it has a manual operation member capable of switching manually operating the two jet flow path. The suction channel is installed so that the axis of the suction channel is parallel to the axis of the circulation adapter body,
The suction end, the circulating adapter according to any one of claim 1 to 3, characterized in that disposed offset in the outer circumferential direction relative to the axis of the suction passage. A scattering prevention plate having an opening that allows the bubble jet to pass substantially straight forward from a front end of the bubble jet outlet and a closed portion that covers an outer peripheral side of the bubble jet is provided. circulating adapter according to any one of claim 1-4.