JP6804038B2 - Hot water mixing faucet - Google Patents

Description

The present invention relates to a hot water mixing faucet.

Conventionally, it has a faucet body provided on the top plate of the counter, and a lever (operation unit) attached to the upper part of the faucet body adjusts the mixing amount and spouting amount of hot water and discharges hot water from the spout. Hot and cold water mixing faucets are known (see, for example, Patent Document 1).
In the faucet main body of the hot water mixing faucet described in Patent Document 1, the lower end portion of the faucet main body is inserted into a mounting hole formed in the top plate of the counter. Then, by screwing a nut from the lower side of the top plate of the counter to the lower end portion of the faucet body, the top plate of the counter is sandwiched and the faucet body is fixed to the counter.

Further, in the hot water mixing faucet described in Patent Document 1, a water supply pipe and a hot water supply pipe connected to the water supply source or the hot water supply source extend from the lower end portion of the water heater main body. Piping terminals are provided at the ends of the water supply pipe and the hot water supply pipe located below the top plate of the counter, and a check valve is provided inside the piping terminal to prevent backflow of water or hot water. It is provided. In such a conventional hot water mixing faucet, since a check valve is provided in the water supply pipe and the piping terminal at the end of the hot water supply pipe, it is possible to secure a sufficient space for accommodating the check valve. it can.

Japanese Unexamined Patent Publication No. 2000-291803

However, in the conventional hot and cold water mixing faucet described above, check valves are provided in the water supply pipe located below the top plate of the counter and in the piping terminal at the end of the hot water supply pipe, so that the check valve is stopped. When replacing or maintaining the valves, the work must be done under the counter, and each check valve must be replaced or maintained. Therefore, there is a concern that the burden on the operator who replaces or maintains the check valve will increase. Further, since the check valve is provided at each end of the water supply pipe and the hot water supply pipe, there is a concern that the number of parts increases and the manufacturing cost increases.

The present invention has been made to solve the above-mentioned problems, and is a hot water mixed faucet capable of improving workability and maintainability and reducing manufacturing costs while preventing backflow of hot water or water. The purpose is to provide.

In order to achieve the above object, according to the hot water mixing faucet according to one aspect of the present invention, the hot water mixing faucet is fixed to the counter while discharging the water supplied from the water supply source and the hot water supply source as hot water mixed water. In the above, a hot water mixing section for generating hot water mixed water and a main body for holding the hot water mixing section are provided, and the main body is connected to a water supply pipe extending from a water supply source and a hot water supply pipe extending from the hot water supply source, and also mixes hot water. A check valve is arranged in the flow path above the upper surface of the counter and downstream of the hot water mixing part, and the part between the hot water mixing part and the main body is watertight. The water-water mixing portion and the main body, and the secondary side flow path downstream of the hot-water mixing portion and formed in the main body are formed so that water can pass through .

According to this configuration, since the check valve is arranged in the flow path above the upper surface of the counter and downstream of the hot water mixing section, the water supply pipe and the hot water supply section are prevented from flowing back to the hot water mixing section. Compared with the case where the check valve is provided in the pipe, the number of parts can be reduced. In addition, since the check valve is located above the top surface of the counter, when replacing or maintaining the check valve, it is possible to work from the top surface side of the counter without working under the counter. it can. Therefore, in the hot water mixed faucet, it is possible to improve the workability and maintainability while preventing the backflow of hot water or water, and reduce the manufacturing cost.
Further, since the hot water mixing part and the main body and the secondary side flow path are formed so that water can pass through, for example, the hot water mixing part is damaged and water leakage occurs between the hot water mixing part and the main body. If this happens, the water leaked between the hot water mixing section and the main body can be passed through the secondary side flow path. Since the water passed through the secondary side flow path flows to the water discharge portion and is discharged, it is possible to detect at an early stage that water leakage has occurred in the faucet body.

Further, in the hot water mixing faucet according to one aspect of the present invention, a seal member is preferably provided between the flow path outlet of the hot water mixing portion and the flow path inlet of the secondary side flow path of the main body. The flow path cross section of the flow path outlet is formed so that at least a part thereof protrudes from the seal cross section of the seal member.

According to this configuration, the flow path cross section of the flow path outlet is formed so that at least a part thereof protrudes from the seal cross section of the seal member. Therefore, with a simpler configuration, water can be formed between the hot water mixing portion and the main body and the secondary side flow path so that water can pass through. As a result, the manufacturing cost of the hot water mixing faucet can be further reduced.

Further, in the hot water mixing faucet according to one aspect of the present invention, a recess is preferably formed in the main body, and a check valve is arranged in the recess.

According to this configuration, since the check valve is arranged in the recess formed in the main body, the check valve can be provided with a simpler structure. As a result, the manufacturing cost of the hot water mixing faucet can be further reduced. Further, when the hot water mixing portion is removed and the check valve is replaced or maintained, the check valve can be removed more easily. Therefore, in the hot water mixing faucet, the workability and maintainability can be further improved.

According to the present invention, in a hot water mixing faucet, it is possible to improve workability and maintainability while preventing backflow of hot water or water, and reduce manufacturing costs.

It is a perspective view of the hot water mixing faucet which concerns on one Embodiment of this invention. It is an exploded perspective view of the faucet body which concerns on one Embodiment of this invention. It is sectional drawing of the faucet body which concerns on one Embodiment of this invention. It is explanatory drawing which showed the attachment structure of the bottom part and the check valve unit which concerns on one Embodiment of this invention. It is a partially enlarged view of FIG. It is the schematic sectional drawing of the faucet body seen along the VI-VI line of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each drawing, similar components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate.

First, the hot water mixing faucet according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the following, the directions shown in the drawings will be used for description.

FIG. 1 is a perspective view of a hot water mixing faucet according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the faucet body according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of the faucet body according to the embodiment of the present invention. FIG. 4 is an explanatory view showing a mounting structure of a bottom portion and a check valve unit according to an embodiment of the present invention.

As shown in FIG. 1, the hot water mixing faucet according to the embodiment of the present invention discharges the water supply source and the water supplied from the hot water supply source as hot water mixed water, and is fixed to the counter C. The hot and cold water mixing faucet A includes a faucet main body 2 attached to the counter C, and a water spouting portion 4 attached to the counter C at a position separated from the faucet main body 2.

A water supply pipe 6 extending from a water supply source and a hot water supply pipe 8 extending from a hot water supply source are connected to the faucet main body 2, and are supplied from the water supply pipe 6 and the hot water supply pipe 8 inside the faucet main body 2. Mix the water. The water mixed inside the faucet main body 2 (hot water mixed water) is supplied to the water discharge unit 4 via the connecting pipe 10 connecting the faucet main body 2 and the water discharge unit 4, and is discharged from the water discharge unit. .. These water supply pipes 6, hot water supply pipes 8, and connection pipes 10 are concealed under the counter C.
The faucet main body 2 does not mix the water supplied from the water supply pipe 6 and the hot water supply pipe 8, but only the water supplied from the water supply pipe 6 or the water supplied from the hot water supply pipe 8 is discharged. It is configured so that it can also be supplied to 4.

As shown in FIGS. 2 and 3, the faucet main body 2 is connected to a hot water mixing unit 20 that generates hot water mixed water, a housing 30 that holds the hot water mixing unit 20, a water supply pipe 6, and a hot water supply pipe 8. It has a fixed pedestal 50 that forms a fixed structure between the bottom portion 40 and the counter C. Further, the faucet main body 2 has a check valve unit 80 housed inside the faucet main body 2. The bottom 40 of the faucet main body 2 is placed above the fixed pedestal 50, and the hot water mixing portion 20 and the housing 30 are placed above the bottom 40.
In the present embodiment, the housing 30 and the bottom 40 have a function as a main body.

The hot and cold water mixing unit 20 has a cylindrical shape as a whole, and is housed inside the faucet main body 2. The hot and cold water mixing unit 20 is a cartridge type and has a plurality of disk-shaped ceramic discs having flow paths formed therein. By rotating and moving the plurality of ceramic discs, the water supplied from the water supply pipe 6 and the hot water supply pipe 8 is mixed, and the hot water supplied to the hot water mixing faucet A is discharged and stopped.

Further, an operation unit 24 is provided above the hot and cold water mixing unit 20 via a transmission unit 22 that transmits an operation amount. When the operation unit 24 is operated, the ceramic disk of the hot water mixing unit 20 rotates and moves according to the operation amount, and the hot water discharge stop water and the flow rate of the hot water supplied from the water supply source or the hot water supply source to the hot water mixing faucet A. The temperature can be controlled.

Further, inside the hot water mixing unit 20, the water supplied from the water supply source passes through the water primary side flow path 44 and the hot water primary side flow path 46 of the bottom 40, which will be described later, from the hot water supply source. A flow path through which the supplied water passes is formed (not shown). Further, a valve mechanism for mixing hot water, discharging hot water, etc. is provided in the middle of these flow paths, and a secondary side flow of the bottom 40 described later is provided downstream of this valve mechanism. A hot water mixing flow path 26 connected to the road 48 is formed. That is, the hot water mixed water generated by the hot water mixing unit 20 is supplied to the secondary side flow path 48 of the bottom 40 through the hot water mixing flow path 26.

The housing 30 is a cylindrical member extending in the vertical direction, and the hot and cold water mixing portion 20 is housed inside the housing 30. Further, the housing 30 is placed above the bottom 40, and a part of the upper end of the bottom 40 is housed inside. Further, the housing 30 and the fixed pedestal 50 are made of a resin material. Therefore, the manufacturing cost can be suppressed and the productivity can be further improved.

The bottom portion 40 is a metal member and is formed in a substantially columnar shape. A collar 42 is formed in the middle of the outer peripheral surface of the bottom portion 40 so as to project in the outer peripheral direction to form a ridge. The housing 30 is placed on the upper surface of the collar 42, and the upper end surface of the fixed pedestal 50 is in contact with the lower surface of the collar 42. Further, in the bottom portion 40, a portion above the collar 42 is housed in the housing 30, and a portion below the collar 42 is housed in the fixed pedestal 50.

A downstream end of the water supply pipe 6 and the hot water supply pipe 8 and an upstream end of the connecting pipe 10 are connected to the lower surface of the bottom portion 40, and flow paths extending vertically upward from the connecting portion are formed. .. On the other hand, on the upper surface of the bottom portion 40, openings are provided for communicating the flow path of the bottom portion 40 and the flow path of the hot water mixing portion 20.

Specifically, the bottom 40 has a water primary side flow path 44 through which water supplied from the water supply pipe 6 passes, a hot water primary side flow path 46 through which water supplied from the hot water supply pipe 8 passes, and a hot water mixing portion 20. Three flow paths of the secondary side flow path 48 through which the hot water mixed water supplied from the above passes are formed. The flow path outlets 44a and 46a of the water primary side flow path 44 and the hot water primary side flow path 46 and the flow path inlet 48a of the secondary side flow path 48 are formed on the upper surface of the bottom portion 40, and these are formed. The flow path outlets 44a and 46a and the flow path inlet 48a communicate with the flow path of the hot and cold water mixing unit 20.

The water supplied from the water supply source or the hot water supply source to the water supply pipe 6 or the hot water supply pipe 8 is supplied to the hot water mixing section 20 through the water primary side flow path 44 or the hot water primary side flow path 46 of the bottom 40. .. In the hot water mixing section 20, the water supplied from the primary side flow path 44 for water and the water supplied from the primary side flow path 46 for hot water are mixed. Then, the hot water mixed water generated by the hot water mixing unit 20 flows from the hot water mixing flow path 26 of the hot water mixing unit 20 to the secondary side flow path 48 of the bottom 40. The hot water mixed water supplied to the secondary side flow path 48 flows into the connecting pipe 10 and is supplied to the water discharge unit 4.
In the faucet main body 2, the water supplied from the primary side flow path 44 for water or the primary side flow path 46 for hot water to the hot water mixing unit 20 is not mixed in the hot water mixing unit 20, but the primary side flow for water. It is configured so that only one of the water supplied from the road 44 or the primary side flow path 46 for hot water can be supplied from the hot water mixing flow path 26 of the hot water mixing unit 20 to the secondary side flow path 48.

The fixed pedestal 50 is a cylindrical member formed separately from the housing 30, and is inserted into a mounting hole C1 provided in the counter C and penetrates the counter C. A step portion 52 is formed on the inner upper portion of the fixed pedestal 50 so as to project from the inner peripheral surface of the fixed pedestal 50 toward the central axis of the fixed pedestal 50, from the upper end surface of the fixed pedestal 50 to the step portion 52. A part of the bottom portion 50 is housed in the formed recessed portion. Further, the water supply pipe 6, the hot water supply pipe 8, and the connection pipe 10 penetrate the fixed pedestal 50 in the vertical direction.

A collar 54 is formed in the middle of the outer peripheral surface of the fixed pedestal 50 so as to project in the outer peripheral direction to form a ridge. The collar 54 is formed below the step portion 52 of the fixed pedestal 50. The portion of the fixed pedestal 50 below the collar 54 is inserted into the mounting hole C1 of the counter C, and the lower surface of the collar 54 and the upper surface of the counter C are in contact with each other. Further, the lower end portion of the fixed pedestal 50 is located below the lower surface of the counter C, and is cylindrical at a position below the collar 54 of the fixed pedestal 50 and below the lower surface of the counter C. A fastening member 60 is provided.

Here, a spiral groove is provided on the outer peripheral surface of the fixed pedestal 50 below the collar 54. On the other hand, on the inner peripheral surface of the fastening member 60, a spiral groove is formed that engages with a spiral groove formed in a portion below the collar 54 of the fixed pedestal 50. That is, by fastening the fastening member 60 to the lower portion of the fixed pedestal 50, the counter C is sandwiched between the collar 54 of the fixed pedestal 50 and the fastening member 60, and the fixed pedestal 50 is fixed to the counter C. In this way, the fixing member 50 forms a fixing structure with the counter C.

Further, the faucet main body 2 has an appearance cover 70 which is arranged on the outer periphery of the housing 30, the bottom portion 40 and the fixed pedestal 50 to form an appearance. The exterior cover 80 is a cylindrical member, and the outer peripheral surface is metal-plated.

The check valve unit 80 is provided above the upper surface of the counter and downstream of the portion of the hot water mixing section 20 having a function of stopping water discharge. The check valve unit 80 includes a check valve 82 inside, and has a function of preventing water or hot water from flowing back from the downstream side to the upstream side.

Specifically, as shown in FIG. 4, the secondary side flow path 48 of the bottom 40 is formed with a recess 49 that is recessed downward from the flow path inlet 48a of the secondary side flow path 48, and is a check valve. The valve unit 80 is housed in a recess 49 formed in the secondary side flow path 48 of the bottom 40. That is, the check valve unit 80 is provided in only one flow path (secondary side flow path 48), and is provided so as to be sandwiched between the bottom portion 40 and the hot water mixing portion 20.

As described above, according to the hot water mixing faucet A according to the embodiment of the present invention, the secondary side flow path 48, which is a flow path above the upper surface of the counter C and downstream from the hot water mixing section 20, Since the check valve is arranged, the number of parts can be reduced as compared with the case where the check valve is provided in the water supply pipe 6 and the hot water supply pipe 8 while preventing the backflow to the hot water mixing portion 20. Further, since the check valve is arranged above the upper surface of the counter C, when replacing or maintaining the check valve, work is performed from the upper surface side of the counter C without working under the counter C. It can be carried out. Therefore, in the hot water mixing faucet A, it is possible to improve the workability and maintainability while preventing the backflow of hot water or water, and reduce the manufacturing cost.

Here, tentatively, the check valve unit 80 is provided in the water primary side flow path 44 and the hot water primary side flow path 46 of the bottom 40, respectively, and one of the check valve units 80 is wrong on the upstream side and the downstream side at the time of construction. If they are assembled together, water will not be supplied from the flow path on the side that was assembled by mistake, but water will be supplied from the other flow path. Therefore, there is a concern that the installer or the user may use the defect as it is without noticing the defect, or the discovery of the defect may be delayed.
In the hot water mixing faucet A according to the embodiment of the present invention, one check valve unit 80 is provided downstream (secondary side flow path) from the valve mechanism of the hot water mixing unit 20. Therefore, if the upstream side and the downstream side of the check valve unit 80 are erroneously assembled, water will not be supplied downstream of the check valve unit 80, that is, water will not be discharged from the water discharge unit 4. Therefore, a defect of the hot water mixing faucet A can be detected at an early stage.

Further, if the check valve unit 80 is provided in the water primary side flow path 44 and the hot water primary side flow path of the bottom 40, respectively, and only the hot water primary side flow path 46 is in a water flow state, that is, When only hot water is discharged from the water discharge unit 4, the check valve of the check valve unit 80 provided in the primary water flow path 44 is in a closed state. In this state, if the state in which only the primary side flow path 46 for hot water is continuously passed, the temperature of the water in the primary side flow path 44 for hot water rises due to the hot water passing through the primary side flow path 46 for hot water. .. When the temperature of water rises, the volume of water in the primary water flow path 44 (in the flow path between the hot water mixing unit 20 and the check valve) expands accordingly, and the check valve unit 80 reverses. The check valve is pressed in the closing direction. Further, the heat of the hot water is transferred to the check valve in the check valve unit 80. As a result, there is a concern that the check valve of the check valve unit 80 provided in the primary water flow path 44 may stick in a closed state.
In the hot water mixing faucet A according to the embodiment of the present invention, one check valve unit 80 is provided downstream (secondary side flow path) from the valve mechanism of the hot water mixing unit 20. Therefore, the check valve 82 of the check valve unit 80 is always open even when only the primary side flow path 46 for hot water is in the water flow state, that is, even when only the hot water is discharged from the water discharge unit 4. In this state, the heat of the hot water prevents the check valve 82 of the check valve unit 80 from sticking in the closed state.

Further, since the check valve is arranged in the recess 49 formed in the bottom portion 40 of the main body, the check valve can be provided with a simpler structure. Thereby, the manufacturing cost of the hot water mixing faucet A can be further reduced. Further, when the hot water mixing unit 20 is removed and the check valve is replaced or maintained, the check valve can be removed more easily. Therefore, in the hot water mixing faucet A, the workability and maintainability can be further improved.

Next, with reference to FIGS. 5 and 6, the structure between the hot water mixing portion, the housing, and the bottom portion of the faucet main body will be described in detail.

FIG. 5 is a partially enlarged view of FIG. FIG. 6 is a schematic cross-sectional view of the faucet body as seen along the VI-VI line of FIG.

As shown in FIG. 5, an annular sealing member 32 is provided between the upper inner peripheral surface of the housing 30 and the upper outer peripheral surface of the hot water mixing portion 20. That is, a part between the hot water mixing portion 20 and the housing 30 which is the main body is watertightly formed by the sealing member 32. Further, a seal member 90 for partitioning the flow path outlet 44a and the flow path outlet 46a is provided between the bottom portion 40 and the hot water mixing portion 20 of the main body, and the hot water mixing portion 20 and the bottom portion 40 are provided with a seal member 90. The space and the secondary side flow path 48 of the bottom 40 are formed so that water can pass through.
An annular sealing member 34 is also provided between the housing 30 and the bottom 40.

As shown in FIG. 6, the seal member 90 is arranged on the upper surface of the bottom portion 40, and the seal member 90 allows the flow path of the hot water mixing portion 20, the water primary side flow path 44 of the bottom portion 40, and the hot water primary side. The three flow paths of the flow path 46 are watertightly formed. That is, the seal member 90 prevents water flowing through each of the three flow paths from mixing. In addition, in top view, the flow path cross section of the flow path outlet 26a of the hot water mixing flow path 26 of the hot water mixing section 20 is a seal of the seal member 90 surrounding the flow path inlet 48a of the secondary side flow path 48. It is formed so that at least a part of it protrudes from the cross section. In this way, a part of the flow path cross section of the flow path outlet 26a of the hot water mixing flow path 26 is formed so as to protrude from the seal cross section of the seal member 90, so that between the hot water mixing portion 20 and the bottom portion 40. , The secondary side flow path 48 of the bottom 40 is formed so that water can pass through.

As described above, in the hot water mixing faucet A according to the embodiment of the present invention, the hot water mixing portion 20 and the bottom portion 40 which is the main body and the secondary side flow path 48 formed in the bottom portion 40 pass through. It is water-enabled. Therefore, for example, if the hot water mixing section 20 is damaged and water leakage occurs between the hot water mixing section 20 and the main body (housing 30 or bottom 40), the hot water mixing section 20 and the main body (housing 30 or bottom 40) ), The water leaked to the secondary side flow path 48 can be passed through. Since the water passed through the secondary side flow path 48 flows to the water discharge unit 4 and is discharged, it is possible to detect at an early stage that water leakage has occurred in the faucet main body 2.

Further, the flow path outlet 26a of the hot water mixing flow path 26 is formed so that at least a part thereof protrudes from the seal cross section of the seal member 90 that surrounds the flow path inlet 48a of the secondary side flow path 48. Therefore, with a simpler configuration, water can pass between the hot and cold water mixing unit 20 and the main body (housing 30 or bottom 40) and the secondary side flow path 48. As a result, the manufacturing cost of the hot water mixing faucet A can be further reduced.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

For example, in the present embodiment, the configuration in which the housing 30, the bottom 40, and the fixed pedestal 50 are separate bodies has been described, but these three members may be integrally formed, or any of the three members. The two members may be integrally formed.

The elements included in each of the above-described embodiments can be combined as technically possible, and the combination thereof is also included in the scope of the present invention as long as the features of the present invention are included.

2 Faucet body 4 Water discharge part 6 Water supply pipe 8 Hot water supply pipe 10 Connection pipe 20 Hot water mixing part 22 Transmission part 24 Operation part 26 Hot water mixing flow path 26a Flow flow outlet 30 Housing 32, 34 Seal member 40 Bottom 42 collar 44 Primary for water Side flow path 44a Flow path outlet 46 Primary side flow path for hot water 46a Flow path outlet 48 Secondary side flow path 48a Flow path inlet 49 Recessed portion 50 Fixed pedestal 52 Step part 54 Faucet 60 Fastening member 70 Appearance cover 80 Check valve unit 82 Check valve 90 Seal member A Hot water mixing faucet C Counter

Claims (3)

In the hot water mixing faucet fixed to the counter while discharging the water supplied from the water supply source and the hot water supply source as hot water mixed water.
The hot water mixing part that generates the hot water mixed water and
A main body that holds the hot and cold water mixing portion, and
A water supply pipe extending from the water supply source and a hot water supply pipe extending from the hot water supply source are connected to the main body, and the hot water mixing portion is placed on the main body.
A check valve is arranged in the flow path above the upper surface of the counter and downstream of the hot water mixing section .
A part between the hot water mixing part and the main body is formed watertightly.
A hot and cold water mixing faucet formed so that water can pass between the hot and cold water mixing section and the main body, and a secondary side flow path formed in the main body downstream of the hot and cold water mixing section . A seal member is provided between the flow path outlet of the hot and cold water mixing portion and the flow path inlet of the secondary side flow path of the main body.
Flow cross-section of the flow path outlet, mixing valve according to claim 1 which is formed so as to at least partly protrude from the sealing section of the sealing member. A recess is formed in the main body.
The hot water mixing faucet according to claim 1 or 2 , wherein the check valve is arranged in the recess.

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