JP2000300452A - Connector for hot water circulation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector for hot water circulation enabling hot water in a bathtub to be sucked even from a filter in front of an intake hole to effectively utilize the whole filter when the connecter is attached on a side of the bathtub, preventing hairs or dust mixed in the hot water in the bathtub from being sucked from the intake hole. SOLUTION: This connector for hot water circulation has a spout for spouting hot water into a bathtub and an intake hole for sucking hot water in the bathtub. The intake hole is covered by a filter through which hot water can be sucked. And a dust suction preventive plate 9 is mounted between the intake hole 10 and the filter 2c opposite to the intake hole 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water circulation connector used for forcibly circulating hot water between a forced circulation hot water heater and a bathtub.

[0002]

2. Description of the Related Art Conventionally, in order to forcibly circulate hot and cold water between a bathtub and a forced circulation hot water supply device, a forced circulation hot water supply device is provided at a side portion of the bathtub through a connection pipe for an outbound path and a connection pipe for a return path. There are various types of hot water circulation connectors that are connected to the water heater.

[0003] Recently, in order to eliminate connection errors between the outgoing connection pipe and the return connection pipe to the two connecting portions of the hot water circulation connector, and to increase the work efficiency at the time of construction of each connection pipe, the hot water circulation is performed. The forced circulation of hot and cold water is not impaired even if the forward connection pipe and the return connection pipe are connected to either of the two connection parts (for the forward path and the return path) provided at the rear part of the connecting device. Many hot water circulation fittings (commonly known as non-polar type hot water circulation fittings) have been developed and used.

[0004] When these conventional hot water circulation connectors are provided on the side of the bathtub and used, hot water in the bathtub is sucked into the hot water circulation connector from the suction port of the hot water circulation connector.
The water is returned to the forced circulation water heater through the return connection pipe.

[0005] In this case, in order to prevent hair and dust from flowing into the hot water circulation connector and the forced circulation water heater from the suction port of the hot water circulation connector, a conventional hot water circulation connector is used. A filter cap having a filter is provided in front of the suction port to prevent hair and dust from being trapped by the filter and flowing in when hot water in the bathtub is sucked into the hot water circulation connector from the suction port. ing.

[0006] However, during the daily use of the hot and cold water circulation connection device, a lot of hair and dust adheres intensively to the portion of the filter facing the suction port, so that the appearance becomes poor, and the dust and the like become poor. There has been a problem that the intensive adhesion also hinders the smooth suction operation of hot and cold water. Also, some of the hair sucked into the suction port from the bathtub by the hot water circulation pump of the forced circulation water heater may go straight toward the suction port, and such hair passes through the eyes of the filter. It was one of the factors that hindered the function of hot water circulation connectors and forced circulation water heaters.

[0007] Therefore, in the conventional connection device for hot and cold water circulation, a shielding plate is provided at a portion of the filter facing the suction port, and a lot of hair, dust, and the like are concentrated on the portion facing the suction port. Some tried to prevent this.

[0008]

However, in the above-described configuration in which the shielding plate is provided at the filter portion facing the suction port, the function of the filter at the location where the shielding plate is provided is blocked. As a result, dust and the like adhere to portions other than the portion of the filter facing the suction port, and there is a problem that the entire filter cannot be used effectively. In addition, there is a concern that the shield plate prevents the hot water from being sucked into the hot water circulation connector from in front of the suction port, and the smooth suction operation of the hot water is hindered by pressure loss of the shield plate that blocks the front of the suction port. There was also.

The present invention has been developed in view of the above points, and its purpose is to provide a filter in front of a suction port when used on the side of a bathtub. Hot water circulation in which the hot water in the bath tub can be sucked and the entire filter can be used effectively, and the hair, dust and other dust mixed with the hot water in the bath tub can be prevented from being sucked through the suction port. To provide a connection device for a vehicle.

[0010]

The present invention has the following configuration in order to effectively achieve the above object. That is, the connector for hot water circulation of the present invention according to claim 1 has a discharge port for discharging hot water into the bathtub and a suction port for sucking hot water in the bathtub, and the hot water covered with the filter by the filter. In the connection device for circulation, a configuration characterized in that a dust suction preventing plate is provided between the suction port and the filter so that hot water in the bathtub can be sucked from a filter at a position facing the suction port. It is.

The connector for circulating hot water according to the second aspect of the present invention has a discharge port for discharging hot water into the bathtub and a suction port for sucking hot water in the bathtub, and the suction port is covered with a filter. In the hot water circulation connector, a dust suction preventing plate is provided on the filter side so that hot water in the bathtub can be sucked from the filter at a position facing the suction port. is there.

In addition, the hot water circulation connector according to the third aspect of the present invention has a discharge port for discharging hot water into the bathtub and a suction port for sucking hot water in the bathtub, and the suction port is covered with a filter. In the connector for hot water circulation, a dust suction preventing plate is provided on the suction port side so that hot water in the bathtub can be sucked from a filter at a position facing the suction port. It is.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. The connection device for hot and cold water circulation 1 according to the present invention (see FIG. 1) includes a filter cap 2.
And a connecting member body 3 to be described later, and a connecting member 6 having connecting portions 4 and 5. The connecting portions 4 and 5 of the connecting member 6 are connected to respective connecting pipes (not shown) for the forward path and the returning path which are connected to the forced circulation type water heater (not shown).

The above filter cap 2 (FIGS. 1 to 6)
Is a cap main body 2a formed of a synthetic resin material and having a U-shaped cross section, and a cap case 2b formed of a metal material such as stainless steel so as to be fitted on the outer surface side of the cap main body 2a. And this cap case 2b
And a filter 2c provided between the cap body 2a and the circular front surface 7 of the cap body 2a.

The front surface 7 of the cap body 2a and the front surface 7
A plurality of substantially triangular front openings 8a, 8b are formed at regular intervals in the circumferential direction from the center of the cap body 2a and the cap case 2b at the same location of the cap case 2b facing the outer surface. Openings 8d for discharging hot and cold water are formed in two places. A dust suction prevention plate 9 is provided at a predetermined front opening 8c of the cap body 2a.

That is, the above-mentioned dust suction preventing plate 9 is
When the filter cap 2 is attached to the front side of the connector body 3 to be described later, the cap body 2a is located at a position facing the suction port 10 (the first slot 17 and the second slot 18) of the connector body 3. At a substantially central portion of the front opening 8c, it is formed in an arc band shape as shown in FIGS. 1, 2, 4, and 6 integrally with the cap body 2a.

Further, the dust suction preventing plate 9 in the filter cap 2 is formed such that a predetermined gap 11 is formed between the filter and the opposing filter 2c (see FIGS. 2, 3, and 5). That is, the ribs 12 on both sides of each front opening 8c of the cap body 2a have a thickness of 2 mm,
The thickness of the dust suction prevention plate 9 is 1 mm, and the dust suction prevention plate 9 is formed so as to be flush with the connecting body 3 side of the rib 12 and to be suspended between the ribs 12, so that the cap main body 2 a The front surface 7 and the front surface 9a of the dust suction prevention plate 9
And a gap 11 of about 1 mm is generated between them.

Thus, when the connector 1 for hot water circulation of the present invention is provided on the side of the bathtub and used, the hot water in the bathtub is also connected to the filter 2c facing the dust suction preventing plate 9. The air can be sucked into the suction port 10 (the first slot 17 and the second slot 18) of the main body 3.

The size and shape of the dust suction preventing plate 9
The thickness is not limited to the above example, and the size, shape, and thickness can be freely changed as long as the suction port can be covered by the dust suction preventing plate 9 so that hot water can be sucked. Further, the dust suction prevention plate 9 may be formed separately from the cap body 2a and attached to a predetermined position of the cap body 2a with an adhesive, or may be fitted to a predetermined position of the cap body 2a. It may be formed. Further, the dust suction prevention plate 9 is not limited to a synthetic resin material, and may be formed of a corrosion-resistant metal material or a metal material subjected to corrosion prevention plating.

Next, the connector body 3 (see FIG. 1) as an example of the connector 1 for hot and cold water circulation according to the present invention includes a body cap portion 13, a body portion 14, a connection receiving member 15, and an annular packing 16. (Normally, a plurality is used, not shown).

The main body cap portion 13 has a circular shape capable of engaging with the inner periphery of the filter cap 2, and has a small arc-shaped first slot 17 and a second slot 18 which are adjacent to the left and right of the center. The partition is formed so as to penetrate in the front-rear direction. The first slot 17 and the second slot 18 are provided when the filter cap 2 is attached to the connector body 3 side.
The dust suction prevention plate 9 is opposed to the dust suction prevention plate 9 and is covered by the dust suction prevention plate 9 with a slight gap.

On the back side of the main body cap portion 13,
Protrusions 20 that can be inserted into insertion recesses 19 formed in three places of the main body 14 are formed at intervals of 120 °.

The main body 14 is connected to the main body cap 13
Water passage formation part 21 which can be detachably mounted on the front side
And a tubular portion 22 formed in the center of the rear part of the hot water passage forming portion 21.

On the one side of the hot water passage forming section 21, a forward hot water passage 24 and a forward water auxiliary hot water passage 25 communicating with the forward water water passage 24 are formed on one side through a central partition 23. The outward hot water passage 25 is formed so as to communicate with the first slot 17 when the main body cap portion 13 is fitted to the hot water passage forming portion 21. Further, the outward water passage 24 is formed so as to communicate with an opening 26 formed at an outer peripheral portion obliquely below the water passage formation portion 21.

In the vicinity of the opening 26, the opening 26
The opening and closing plate 27 is provided so as to be openable and closable so as to be able to open and close. The opening / closing plate 27 can be opened outward and operates so as to close to the outward hot water passage 24 side.

Further, a communicating portion 28 where the forward water passage 24 and the forward water passage 25 intersect with each other is provided with the forward water passage 2.
A partition plate 29 is provided so as to be able to open and close, or to block or allow communication between the subway water passage 4 and the outward water supply passage 25. The partition plate 29 can be opened in the direction of the opening 26, and operates so as to be closed on the side of the auxiliary hot water passage 25 for the forward path.

Further, a hole (not shown) is formed at the center of the hot water passage forming portion 21 of the hot water passage 24 for the outward path so as to communicate with the above-mentioned cylindrical portion 17.

Further, the outgoing hot water passage 24 has an opening 26.
It is inclined so that the cross-sectional area gradually decreases as it approaches (the position where the opening / closing plate 27 is provided).

On the other hand, a return water passage 30 and a return auxiliary water passage 31 communicating with the return water passage 30 are formed on the other side of the hot water passage forming portion 21 via the central partition 23. ing. The return hot water passage 31 is
It is formed so as to communicate with the second slot 18 when the main body cap portion 13 is fitted into the hot water passage forming portion 21. The return water passage 30 is formed so as to communicate with an opening 32 formed in an outer peripheral portion obliquely below the water passage formation portion 21.

In the vicinity of the opening 32, the opening 32
The opening and closing plate 33 is provided so as to be openable and closable so as to be able to open and close. The opening / closing plate 33 is operable to be opened outward and to be closed to the return hot water passage 30 side.

Further, the communication section 35 where the return water passage 30 and the return auxiliary water passage 31 intersect is provided with the return water passage 30.
A partition plate 34 is provided so as to be able to open and close, so as to block or allow communication with the return water passage 31. The partition plate 34 can be opened in the direction of the above-mentioned opening 32 and operates so as to be closed on the side of the return hot water passage 31. Also, the hot water passage forming section 21 of the hot water passage 30 for the return path
A through hole (not shown) is formed on the rear side on the center side. Further, the return water passage 30 is formed so as to be inclined so that the cross-sectional area becomes gradually smaller as approaching the opening 32 (the position where the opening / closing plate 33 is provided).

In the example shown in the figure, the reference numeral 24 in the figure describes the outward hot water passage, 25 the outward hot water passage, 30 the return hot water passage, and 31 the return hot water passage.
In the figure, reference numeral 30 may be a forward water passage, 31 may be a forward water passage, 24 may be a return water passage, and 25 may be a return water passage. Depending on how the connection pipe for the outward path (not shown) and the connection pipe for the return path (not shown) are connected to the connection member 6, a passage configuration as shown in the figure may be obtained, or the above-mentioned 30 may be a hot water passage for the outward path. The passage configuration is as follows.

Next, the connection receiving member 15 is formed by forming a flange-shaped receiving portion 37 at one end of a cylindrical portion 36.
A male screw 38 is formed on the outer peripheral surface of the cable 6. A plurality of projections 39 are formed in the receiving portion 37 at an integral interval, and a screw hole 40 is formed in each projection 39.
A predetermined projection 3 of the receiving portion 37 via a screw (not shown)
9 is designed to be able to be connected to the hot water passage forming portion 21 described above.

The packing 16 is formed in a ring shape from rubber, synthetic resin material or the like.

Next, the connecting member 6 has a cylindrical shape with a bottom and a cylindrical portion 41 formed at the center. The tubular portion 41 communicates with the connecting portion 4 formed integrally with the tubular portion 41. In addition, cylinder part 4
The space passage 43 between the first cylindrical part 42 and the outer cylindrical part 42 communicates with the connecting part 5 formed integrally with the cylindrical part 41. Further, a female screw 44 is formed on the inner peripheral surface near the opening end of the outer cylindrical portion 42 so that the female screw 44 can be screwed with the male screw 38 of the connection receiver 15.

In the hot water circulation connector 1 having the above-described configuration, the hot water passage forming portion 21 is connected to the connection receiving member 15, and the main body cap portion 13 is fitted to the front surface of the hot water passage forming portion 21. Then, the filter cap 2 is fitted to the front surface of the main body cap portion 13. In this case, the dust suction prevention plate 9 of the filter cap 2 is
The suction port 10 (the first slot 17 and the second slot 18) is covered with the suction port 10 so that hot and cold water can be sucked. The opening 8d of the filter cap 2 coincides with the opening 32 of the hot water passage forming portion 21, and the other opening 8e formed on the outer peripheral portion of the filter cap 2 coincides with the opening 26 of the hot water passage forming portion 21. I do.

The filter cap 2 and the connector body 3 combined in this manner are arranged in a bath tub, and the filter cap 2 faces the bath tub, and a hole formed in a side portion (not shown) of the bath tub. The cylindrical portion 36 of the connection receiving member 15 is provided with the packing 16 and inserted thereinto, and the female screw 44 of the connecting member 6 and the external thread 38 of the cylindrical portion 36 of the connection receiving member 15 are screwed from outside the bath tub to form a filter. A cap 2 and a connector body 3;
The connecting member 6 is attached to the side of the bathtub. In this case, the openings 32, 23 of the connector body 3 and the openings 8d, 8e of the filter cap 2 face the bottom of the bathtub. The cylindrical portion 17 of the main body 14 is inserted into and connected to the cylindrical portion 41 of the connecting member 6.

A connecting pipe 5 (not shown) is connected to the connecting section 5 of the connecting device 1 for hot and cold water circulation attached to a side portion (not shown) of the bathtub, and a connecting pipe 6 is connected to the connecting section 6 for returning. (Not shown)
Are connected, but the connection may be reversed. These two connection pipes are connected to a forced circulation water heater (not shown).

The bath tub is filled with water to an appropriate water level by the hot water circulation connector 1, each connecting pipe, and the forced circulation hot water supply device thus mounted, and the forced circulation hot water supply device is operated.
That is, the circulation pump of the forced circulation water heater is operated,
In addition, the burner is ignited to reheat the bath water.

In this case, the hot water heated by the forced circulation water heater flowing into the tubular portion 22 of the connector body 3 from the connecting portion 4 via the tubular portion 41 through the tubular portion 41 is supplied to the hot water passage 24 for the outward path of the hot water passage forming portion 21. Then, the opening / closing plate 27 is opened by water pressure from the opening 26 via the hot water passage 24 for the outward path, and is discharged to the bottom side in the bathtub.

At this time, the hot and cold water in the bathtub is removed by the suction force of the discharge flow and the front openings 8a and 8
b, 8c via the filter 2c, the main body cap portion 1
3 is sucked into the outgoing-path auxiliary hot / water passage 25 through the first slot 17. Hot water flowing into the first slot 17 from the front opening 8c through the filter 2c does not directly enter the first slot 17, but flows into the gap 11 after passing through the filter 2c to prevent dust suction. When the dust 9 comes in contact with the plate 9 and flows in the vertical direction of the dust
It is sucked into. Therefore, the dust suction prevention plate 9
At the location of the filter 2c provided with, dust, hair, scale, etc., are not drawn straight to the filter 2c but are sucked from an oblique direction. Therefore, dust flows in the filter 2c in a straight flow with respect to the filter 2c.
However, since it is sucked obliquely with respect to the mesh, it is easy to be caught by the filter 2c and the inflow of dust can be prevented as much as possible.

The hot and cold water that has entered the outward hot water passage 25 as described above opens the partition plate 29, merges with the hot water in the hot water passage 24, and is discharged from the opening 26 into the bathtub.

Further, since the cross-sectional area is formed so as to become gradually smaller as approaching the opening 26 (the position where the opening / closing plate 27 is provided), the flow of the water discharged from the opening 26 on the outward water passage 24 side is reduced. The momentum becomes stronger, and acts so as to more strongly suck the hot water on the side of the subway water passage 25 for the outward path.

On the other hand, in this state, the water was sucked from the front openings 8a, 8b, and 8c of the filter cap 2 through the filter 2c and into the return hot water passage 31 from the second slot 18 of the main body cap portion 13. The hot water opens the partition plate 34 by the water flow and flows into the return hot water passage 30. From the return hot water passage 30, the through-hole 34 (not shown), the cylindrical portion 36 of the connection receiver 15 and the cylindrical portion of the main body 14 are formed. Through the space passage 43 of the connecting member 6, the water is returned from the connecting portion 5 to the return connection pipe (not shown) and the forced circulation water heater (not shown). At this time, the on-off valve 33 is closed by the suction force.

In the flow of the hot water for the return path, the hot water flowing into the second slot 18 from the front opening 8c via the filter 2c is directly transmitted to the second hot water similarly to the hot water flowing into the first slot 17 described above. Instead of being sucked into the two-slot hole 18,
After passing through the filter 2c, it flows into the gap 11 between the filter 2c and the dust suction preventing plate 9, hits the dust suction preventing plate 9, flows in the vertical direction of the dust suction preventing plate 9, and flows into the second slot. It is sucked into 18. Therefore, at the filter 2c where the dust suction preventing plate 9 is provided, the hot water is sucked obliquely with respect to the filter 2c, so that dust such as dust, hair, scale, etc. contained in the hot water easily gets caught on the filter 2c. In addition, the inflow of dust can be prevented as much as possible.

Next, FIG. 7 shows the hot water circulation connector 1 of the embodiment of the present invention, in which the main body cap portion 13 is located on the suction port 10 (first slot 17 and second slot 18) side (see FIG. 8). In addition, a dust suction preventing plate 9 is provided. That is, the dust suction prevention plate 9 includes a plate portion 9b and a leg portion 9c, and covers the first slot 17 (and the second slot 18) with an appropriate interval by the plate portion 9b, and with a predetermined interval. A plurality of legs 9c provided on the plate 9b are fixed around the first slot 17 (and the second slot 18). As a result, hot water flows into the first slot 17 (and the second slot 18) from the gap 9d between the legs 9c.

In the case where the dust suction preventing plate 9 is provided on the main body cap portion 13 side, it is not necessary to provide the dust suction preventing plate 9 on the filter cap 2 side. Also in this example, hot water containing dust sucked into the connecting member main body 3 from the filter 2c of the filter cap 2 goes straight as in the example shown in FIG. The flow into the slot 18) is blocked by the dust suction preventing plate 9, and flows into the first slot 17 (and the second slot 18) from the gap 9d between the legs 9c as described above.

Therefore, at the place of the filter 2c where the dust suction preventing plate 9 is provided, as in the example shown in FIG. 1, during use, the hot water sucked from the bathtub does not remove dust, hair, scale, etc. The filter 2c is sucked obliquely instead of going straight to the filter 2c.
c can easily be caught and the inflow of dust can be prevented as much as possible. The other configuration in the figure is the same as the configuration shown in FIG. 1, and the same parts are denoted by the same reference numerals and description thereof will be omitted.

FIG. 10 shows the suction port 10 of the main body cap 13.
It is a figure which shows the principal part of another example in which the dust suction prevention plate 9 was provided in the (1st slot 17 and the 2nd slot 18) side. In this example, the dust suction prevention plate 9 includes a plate portion 9b and the plate portion 9a.
And a support plate 9f for fixing the support shaft 9e to the main body cap 13. In this example, the first slot 17 (and the second slot 1) is formed by the plate portion 9b.
8) is covered at appropriate intervals, and is fixed to the center position of the first slot 17 (and the second slot 18) by the support shaft 9e and the support plate 9f. Hot water is used when using the plate 9b.
Flows into the first slot 17 (and the second slot 18) from the periphery of the first slot 17.

Also in this case, it is not necessary to provide the dust suction preventing plate 9 on the filter cap 2 side (see FIG. 10). The hot water containing dust sucked into the connector body 3 from the filter 2c of the filter cap 2 goes straight and flows into the first slot 17 (and the second slot 18) to prevent the dust suction plate 9 from flowing. Accordingly, as described above, it flows into the first slot 17 (and the second slot 18) from around the plate portion 9b. In this case, the same operation and effect as those of FIGS. 1 and 6 can be obtained. The other configuration in the figure is the same as the configuration shown in FIG. 1, and the same parts are denoted by the same reference numerals and description thereof will be omitted.

It should be noted that the present invention is not limited to the configuration of the hot water circulation connector of the illustrated example. If a filter cap having a main part of the present invention is used, the hot water circulation connector is constructed. The connecting member body 3 and the connecting member 6 having another configuration may be a connecting member body and a connecting member having a structure other than the illustrated structure.

[0052]

As described above, according to the connecting device for hot and cold water circulation of the present invention, between the filter at the position facing the suction port and between the suction port and the filter, or on the suction port side or the filter side, the bathtub is connected. By installing a dust suction prevention plate so that hot water can be sucked in, the filter can be used effectively by using the filter effectively without closing the filter facing the dust suction prevention plate when it is installed in the bathtub. Can be sucked into the hot water circulation connector,
The hot and cold water in the bathtub that is sucked into the suction port by the interposition of the dust suction prevention plate changes its suction flow, and is not drawn into the suction port so as to go straight to the filter, but from an oblique direction with respect to the filter. Since the dust flows into the filter, dust easily gets caught in the mesh of the filter, and the dust can be prevented from flowing into the hot water circulation connector, the connection pipe, or the forced circulation water heater. Therefore, it is possible to reduce the frequency of cleaning the hot water circulation connector and the like, and it is possible to prevent the hot water circulation connector from malfunctioning due to dust.

[0053]

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a connector for hot and cold water circulation according to the present invention.

FIG. 2 is a front view of a cap body of the filter cap according to the present invention.

FIG. 3 is an explanatory view of a cross-section taken along the line AA of FIG. 2;

FIG. 4 is a rear view of the cap body of the filter cap according to the present invention.

FIG. 5 is an enlarged sectional view of a main part of a filter cap according to the present invention.

FIG. 6 is an enlarged perspective view of the filter cap shown in FIG.

FIG. 7 is an exploded perspective view of another example of the hot water circulation connector according to the present invention.

FIG. 8 is an enlarged perspective view of a main body cap portion of FIG. 6;

FIG. 9 is an exploded perspective view of another example of the hot water circulation connector according to the present invention.

FIG. 10 is an enlarged perspective view of a main body cap portion of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot water circulation connector 2c Filter 9 Dust suction prevention plate 10 Suction port 26 Opening (discharge port) 32 Opening (discharge port)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Minoru Hatano 2-33, Wakamatsucho Higashi, Tondabayashi-shi, Osaka Prefecture Hatano Works Co., Ltd. F term (reference) 2D005 DA00 FA00

Claims (3)

[Claims] 1. A hot water circulation connector comprising a discharge port for discharging hot water into a bathtub, a suction port for sucking hot water in the bathtub, and the suction port covered with a filter. And a dust suction preventing plate provided so that hot water in the bathtub can be sucked from a filter at a position facing the suction port. 2. A hot water circulation connector comprising a discharge port for discharging hot water into the bathtub and a suction port for sucking hot water in the bathtub, wherein the suction port is covered with a filter. A connector for circulating hot water, wherein a dust suction preventing plate is provided so that hot water in a bathtub can be sucked from a filter at a position facing the suction port. 3. A hot water circulation connector having a discharge port for discharging hot water into the bathtub and a suction port for sucking hot water in the bathtub, wherein the suction port is covered with a filter. A hot water circulating connector, wherein a dust suction preventing plate is provided so that hot water in the bathtub can be sucked in from a filter at a position facing the suction port.