JPH032776Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a hot water mixing faucet for tap water.

(Prior art and its problems) Generally, hot water supply using tap water involves connecting the tap water to a heating mechanism such as a boiler or water heater via a pressure reducing valve.
This is done by ignition by operating a flow switch. In this case, the water pressure is reduced twice by the pressure reduction by the pressure reducing valve and the fluid pressure drop when passing through the narrowed or bent heating passage in the heating mechanism, and therefore, due to some circumstances, Furthermore, when pressure is reduced, the flow switch automatically reactivates and extinguishes the fire, and we often experience that hot water cannot be supplied even when needed. In this regard, various improvements in heating mechanisms and valve mechanisms of mixing faucets have been disclosed.

The present invention is a mixing faucet with a mechanism for supplying hot water and water by merging and mixing them into a cheese-shaped mixing water supply pipe.
Since there is a pressure difference between the tap water pressure and the hot water pressure passing through the heating mechanism, if this pressure difference becomes larger, the tap water pressure will act as a backflow pressure against the hot water during mixing, reducing or preventing the hot water from flowing out. The present invention has been made with this in mind, and for this purpose, the mixing hot water supply unit has been improved from a different perspective from the conventionally disclosed improvements in the valve unit mechanism.
At the same time, it adopts a rotatable configuration.

(Means for Solving the Problems) In order to achieve the above object, the present invention forms a hot water passage communicating with a hot water faucet and a water passage communicating with a faucet in isolation in the inner part of the pipe, with the tip direction facing the faucet. The mixing faucet is equipped with a hot water supply pipe section, the hot water supply pipe section is rotatably attached to a separation chamber, and the separation chamber has a hot water chamber communicating with the hot water faucet side and a water supply pipe section communicating with the faucet side. A penetrating pipe holder is formed in each chamber, and the end of the hot water supply water pipe is rotatably or watertightly fitted into the pipe holder. The hot water passage communicates with the bath water chamber by forming an opening communicating with the water chamber on the circumferential surface of the water passage; It has a structure in which it communicates with the water chamber.

(Function) According to this, hot water and water flow in separate passages toward the faucet, so the hot water supply pipe section is configured such that backflow pressure due to tap water pressure is not added to the hot water pressure, and the hot water supply water pipe section is Free to move.

(Example) The present invention will be described below with reference to drawings shown as an example.

In Figures 4 and 5, the mixing faucet of the present invention consists of a hot water faucet 1 that communicates with a heating mechanism such as a boiler, a faucet 2 that is directly connected to the water supply, and a mixing part 10 that discharges hot water flowing from both faucets to the faucet. ing. The hot water faucet 1 has an inflow side joint pipe part 3 and an outflow side joint pipe part 4, and a water valve 7 consisting of a valve seat and packing formed at the end of a valve shaft 6 which is rotated by a handle 5. The faucet 2 has an inflow joint pipe part 8 and an outflow joint pipe part 9, and the other parts have a similar structure. Hot water faucet 1, faucet 2
All of these are not limited to the above-mentioned configurations, and may be conventionally known or other appropriate configurations.

The mixing part 10 includes connecting pipe parts 11 and 12 connected to the respective outlet joint pipe parts 4 and 9 of the hot water faucet and faucet 2, and the faucet 1.
A hot water supply water pipe section 13 extending in four directions is branched,
A partition wall 15 is provided inside the hot water supply water pipe section 13 to separate a hot water passage 16 communicating from the connection pipe section 11 to the hot water faucet from a water passage 17 communicating from the connection pipe section 12 to the water faucet. is preferably formed in the vicinity of the faucet 14 to a position slightly inward from the faucet end, and the inner surface of the faucet end is preferably formed as an inclined surface 18 toward the central axis direction of the faucet.

The above-mentioned connecting pipe parts 11 and 12 and the outflow side joint pipe part 4,
9 may be connected directly, by a cap nut, or by interposing another joint pipe. The hot water supply pipe section 13 may be a single pipe, or may be connected in the middle by a cap nut or screwing, although not shown.

Accordingly, the present invention provides a mixer faucet in which a hot water passage is defined or at least partially defined in a hot water supply pipe section as described above, as shown in FIGS. 1 to 3. 13 is rotatable.

First, in FIG. 1, a hot water supply pipe section 13 is formed by separating a hot water passage 16 and a water passage 17 by a partition wall 15.
is rotatably inserted into the approximate center of the separation chamber 20 at its base end. The interior of the separation chamber 20 is divided into two upper and lower chambers in the figure, one of which has a connecting pipe section 11 extending outward and connected to the outflow joint pipe section 4 of the hot water faucet. The chamber 22 has a connecting pipe section 12 extending outward to connect with the outflow side joint pipe section 9 of the faucet, and the base end of the hot water supply water pipe section 13 is inserted through the approximately central part of the two chambers. A tube holder 23 to be fitted is formed, and an O-ring 24, 24, 24 for watertightness is attached to the inner circumference of each tube holder 23, respectively.
A male screw portion 25 is provided protruding from the outside of the insertion opening 3, and a cap nut 26 is screwed thereto. This separation chamber 20
The hot water supply water pipe section 13 to be inserted into the hot water supply water pipe section 13 has an opening 27 formed in the circumferential surface of the hot water passage 16 that communicates with the hot water chamber 21 when its base end is fully inserted to the lower end of the separation chamber, and communicates with the water chamber 22. An opening 28 is formed on the circumferential surface of the water passage 17, and a groove 29 for receiving the O-ring is formed at a predetermined position around the outside of the hot water supply pipe portion between the openings 27 and 28 and on the upper and lower sides thereof, Furthermore, a protrusion 30 for locking the cap nut 26 is formed on the inner side of the tube.

In the above, the entire inside of the end of the hot water supply water pipe section 13 is the hot water passage 16, and the water passage 17 is the hot water chamber 21, 2.
The end of the passage is closed at the position between the two,
Although the amount of hot water flowing into the hot water passage 16 is increased to prevent the hot water pressure from decreasing, as shown in FIG. The opening 27a may be formed only on the circumferential surface of the hot water passage 16a, and the opening 28a may be formed only on the circumferential surface of the water passage 17a in the water chamber 22a portion.

In addition, the male thread part 25, the cap nut 26, the protrusion part 3
0 is not necessarily required.

FIG. 3 shows a design modification example in which the connecting pipe portions 11b and 12b are formed at the same level as the separation chamber 20b in the configuration shown in FIG.
Similarly, it is also possible to form both the connecting pipe parts in the extending direction of the hot water supply pipe part with respect to the separation chamber.

In a conventionally configured cheese pipe mixing faucet in which hot water joins from a horizontal direction and flows out into a branch pipe, that is, a faucet, the tap water pressure may act as a backflow pressure to push the hot water back. This also occurs when many faucets with the same heating source are used in parallel and the water pressure is reduced, and even when used alone, the water pressure is lower than the Japanese standard water pressure of 0.6 to 1 kg/cm ² such as American faucets. If a water faucet manufactured for high water pressure (US standard is approximately 3 kg) is used as a hot water faucet, the water pressure difference will be further expanded due to the mechanical pressure loss. A situation may arise in which the tap water pressure restricts the flow of hot water, causing the flow switch to operate and extinguishing the heating source.

According to the above configuration, the hot water entering the hot water supply water pipe section 13 from the connecting pipe section 11 and the water entering the hot water supply water pipe section 13 from the connecting pipe section 12 flow through isolated passages up to the vicinity of the faucet, so that the backflow pressure due to the tap water pressure is Hot water will flow smoothly to the faucet without being affected.

In addition, if the hot water passage is not separated near the faucet and the hot water is merged at the source of the hot water supply pipe, turbulence (eddy flow) will occur at the converging part of the pipe, and the flow of low-pressure hot water will be smooth. However, if the passages are separated near the faucet, the tap water pressure will not necessarily have a negative effect on the flow of hot water because the water will flow out at the same time as it merges. If the inner surface of the faucet end is an inclined surface in the direction of the central axis of the faucet, the merging and mixing of hot water and water will be more fully performed.

(Effects of the invention) As described above, according to the invention, the hot water faucet can be configured as appropriate, and moreover, it becomes a mixing faucet by simply combining the separation chamber and the hot water supply pipe part as parts, so it is highly versatile. It is possible to provide a rotatable mixing faucet that does not impede the smooth flow of water.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the main part showing the rotatable configuration of the hot water supply pipe of the mixed faucet of the present invention, and Figures 2 and 3 are
FIG. 4 is a cross-sectional view showing the entire mixing faucet with a part of the hot water supply pipe section omitted, and FIG. 5 is a schematic cross-sectional view taken along the line -- in FIG. 4. 1...Hot water faucet, 2...Water faucet, 3, 8...Inflow side joint pipe section, 4, 9...Outflow side joint pipe section, 10...Mixing section, 11, 12...Connection pipe section, 13 ... Hot water supply pipe section, 14 ... Faucet, 15 ... Partition wall, 16 ... Hot water passage, 17 ... Water passage, 20 ... Separation room, 21 ...
...Water chamber, 22...Water chamber, 23...Pipe holder, 27,2
8...Opening.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A mixer faucet equipped with a hot water supply pipe section in which a hot water passage communicating with a hot water faucet and a water passage communicating with a faucet are separated in the inner part of the pipe, with the tip facing toward the faucet. The hot water supply pipe section is rotatably attached to a separation chamber, and the separation chamber is divided into a hot water chamber communicating with the hot water faucet side and a water chamber communicating with the faucet side, and each chamber has a A penetrating pipe receiving part is formed, the end of the hot water supply water pipe part is rotatably and watertightly inserted into the pipe receiving part, the hot water passage is formed to communicate with the hot water chamber, and the water passage is communicated with the water chamber. A mixing faucet having a configuration consisting of: (2) The mixture according to paragraph 1, wherein at the end of the hot water supply water pipe section, an opening communicating with the hot water chamber is formed on the circumferential surface of the hot water passage, and an opening communicating with the inside of the water chamber is formed on the circumferential surface of the water passage. plug.