JPS6040874A - Cold and hot water mixing faucet - Google Patents

Abstract

PURPOSE:To prevent high-temperature water from being discharged from a shower muzzle, by providing a high-temperature water shutoff valve for automatically opening or closing a fluid passage depending on the temperature of mixed water at or downstream to a showering valve. CONSTITUTION:When a lever 70 is turned down, a spindle 51 is moved in the axial direction so that a spouting valve C is opened as a valve element 56 is separated from a valve seat 53 while letting the water of a pressure chamber 9 go out through a small hole 59. When a showering valve B is opened, mixed water from a mixing chamber 8 flows down from an outflow chamber 11 at the side of a shower muzzle, toward a connecting pipe 36. When the temperature of the mixed water passing a high-temperature water shutoff valve H has risen, a warmed member case 37 is moved down to elongate a protrusive shaft 38 to seat a packing 41 to close the valve.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a hot water mixer faucet configured to mix hot water and water and discharge the mixture in two directions: the shower side and the spout side.

[Prior art]

A conventional hot water mixer faucet has a spout for supplying water to a bathtub, a washing area, etc., and is also configured to be able to supply water to a shower side. This is equipped with a shower on-off valve and a spout on-off valve that are operated by separate handles on the downstream side of a control valve that adjusts the temperature by changing the mixing ratio of hot water and water. Water can be supplied from both sides at the same time.

However, for example, if you open the spout on-off valve while the shower on-off valve is open and in use, the mixed water can flow out in two directions from the inlet side, which substantially reduces the flow path resistance. , causing a phenomenon in which the temperature of the mixed water changes.

To explain this phenomenon specifically, the water pressure of the water supply source and hot water supply source that supplies hot water to the hot and cold water mixing faucet is generally higher on the water supply side.
For example, it is assumed that the water pressure Pc on the water supply source side is 2 kg/cnL and the water pressure PM on the hot water source side is about 0.5 kg/cnl. Here, the pressure loss P based on the flow path resistance in the hot water mixer faucet when only the shower on-off valve is open is 0.3 kg/cn.
If t, the water supply pressure in the hot water mixer faucet PR, P
L is PK=PC-P+ = 1.7kg/cnL...(1
)PL=PH-P1=0.2kg/crA...
・<22.

Based on these water supply and hot water supply pressure conditions, the mixture ratio of hot water and water is set, and mixed water at an appropriate temperature is discharged from the shower.However, when the shower on-off valve is opened, and the spout on-off valve is further opened, The flow path resistance further decreases, and if the pressure loss P2 based on this flow path resistance is 0.1 kg/cJ, the water supply and hot water supply pressures PM and PN are respectively PM=PC-P2 = 1.9 kg/cJ... (31
PN=PH-P2=0.4kg/cnl...
・It becomes +41.

Here, if the change ratio of water supply and hot water supply pressure before and after opening the spout on-off valve is Rc and RH, then Rc = P M/P
K = 1.1 (5) RH = PN /
PL = 2.0 (6).

Therefore, compared to the rate of change in the flow path resistance of the water supply side pressure, the rate of change on the hot water supply side is approximately twice that, making it easier for the hot water to flow, resulting in a greater amount of hot water being discharged (and the temperature of the mixed water rising). .

Due to the above-mentioned phenomenon, if the spout on-off valve is opened while using a shower, there is a danger that hot mixed water will be discharged from the shower equipment and cause burns.

[Purpose of the invention]

An object of the present invention is to automatically close the flow path to prevent hot mixed water from being discharged from the shower when the temperature of the mixed hot water flowing down in one direction of the shower reaches or exceeds that temperature.

The technical problem to be solved by the present invention is that the spout and shower valves, which are operated by separate handles, are installed downstream of the control valve that manually adjusts the flow rates of hot water and water to produce mixed hot water at a predetermined temperature. When the temperature of the mixed water supplied to the shower reaches a certain temperature or higher, the flow path to the shower side is closed and the supply of mixed water is automatically cut off. be.

[Structure of the invention]

The configuration for achieving the above technical problem is that in a hot water mixing faucet that is equipped with a spout on-off valve and a shower on-off valve in the middle of the mixed water flow path, the shower on-off valve part or the downstream side of the valve The water flow path is provided with a high temperature cutoff valve that has a temperature sensing part and automatically opens and closes the flow path depending on the temperature of the mixed water flowing down.

With the above configuration, when the temperature of the mixed water flowing down into the shower reaches a high temperature while the shower is in use, the high temperature shutoff valve automatically closes the flow path, preventing high temperature water from being discharged from the shower, making it safe to use. can do.

Also, when you open the spout valve while using the shower,
Even if the temperature rises due to the flow path resistance as shown in the conventional example described above, discharge to the shower side is prevented, so it can be used safely as well.

〔effect〕

The present invention achieves the following effects with the above configuration.

1) It is safe to use because hot mixed water is not discharged from the shower.

ji) Since no high temperature cutoff valve is provided on the spout side, hot water at a desired temperature can be supplied when pouring hot water or the like.

〔Example〕

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 and FIG. 2 are a front sectional view and a side sectional view of a hot water mixing faucet according to the present invention.

The hot water mixer faucet body (1) (hereinafter referred to as "main body (1)") has connecting pipes +21. (A water passage (4) and a hot water passage (5) are connected to the connecting pipe +21 (31) which protrudes from the wall surface (W>) and are spaced apart on the left and right inside the main body (1) and communicate with the above connection pipe (3). is formed.Both channels (
A mixing chamber (
8) is defined in the center of the main body (1), and partition walls +9) and (10) that define the upper and lower sides of the mixing chamber (8) create an outflow chamber (1) on the shower head (not shown) side in the upper example. ]) and a water discharge true chamber (12) is formed on the lower side, and the main body (inside 11 is divided into five chambers, and the downstream side from the mixing chamber (8) is formed with a water discharge true chamber (12).
Jt, 'gPf<F>.

Hot water and water are mixed in the mixing chamber (8), and a control valve (A) is provided to adjust the flow rate of hot water into the mixing chamber (8) and set the temperature of the hot water. A shower on-off valve (B) opens and closes the flow path on the head side, and an automatic-closing spout on-off valve (C) opens and closes the spout side flow path for spouting water to the lotus and washing area.

First, to explain the control valve (A), the control valve cylinder body (2
0) is screwed onto the end wall of the water flow path (4), and the control valve cylinder body (
One end of 20) passes through the annular seat (6a) of the partition wall (6) and extends into the mixing chamber (8). (21) is a spindle for the control valve, which is screwed into the control valve cylinder body (20) and spline-engaged with the sub-spindle (21a) to which the control valve handle (22) is fixed. The control valve spindle (21) is rotated by rotating the handle (22).
can move forward and backward in the direction of its axis. Note that the sub spindle (21a) only rotates and does not move forward or backward in the axial direction. The seating portion of the control valve cylinder body (2o) against the annular seat (6a) is approximately 1 yen.
There is a water inlet (2) in the water channel (4).
3) extends in the radial direction, and a water outlet (24) is opened in the axial direction in the mixing chamber (8). The control valve spindle (21) has valve body support parts (25) and (26) bulged out in the radial direction in the mixing chamber (8) at a required interval, and both valve body support parts (25) ) , (2
6) are each provided with conical valve bodies (27) and (28). Due to the movement of the control valve spindle (2]) in the axial direction, the valve body (27) on the proximal end causes water to flow out of the IJ (24).
A hot water inlet (29) can be opened and closed, and a valve body (28) on the tip side is provided in the partition wall (7) to communicate the hot water inlet chamber (5) and the mixing chamber (8). A water valve (D) and a hot water valve 1) which open and close a water flow path are constructed on the axis. Mixing of hot water and water is done by changing the opening degree of each of the water valve (D) and hot water valve (E) by rotating the control valve handle (22), and adjusting the flow rate of hot water to mix the mixed water. Temperature can be adjusted. In this embodiment, the control valve (A) is of a mixing type, but it may also be a two-valve type in which the hot water valve and the water valve each have a dedicated handle, or a single handle that can adjust the mixing ratio of hot water and water and open/close the valve. It may be a single lever type that can be used.

The shower on/off valve (B) is equipped with an operation handle (30) that protrudes from the top surface of the main body fl), and a valve shaft (31) that rotates in one direction with the handle (30) is rotatably screwed into the main body fl). It matches. The partition wall (9) has an opening (32) that communicates the mixing chamber (8) with the outflow chamber (11) of the shower head, and also forms a valve seat (33).
I) The gasket (34) attached to the lower end is attached to the valve stem (31).
) can be moved toward and away from the valve seat (33) to open and close the flow path to the shower/throat side of the mixed water. A connecting pipe (36) is attached to the back side of the main body (1) via a bushing (35) to the outflow chamber (11) on the shower head side, and a shower head (not shown) is attached to the connecting pipe (36). A hose (h) connected to is connected in communication.

The connecting pipe (36) is formed in an L-shape, and there is an annular step in the rising flow path of the bent part! at+ (36a) is formed. Reference numeral (37) denotes a temperature sensing body case which is a temperature sensing part with wax sealed therein, and has a protruding shaft (3B) that can be retracted and retracted in the axial direction by thermal expansion and contraction of the wax. This thermosensitive body case (37) has a small guide piece (40a) that comes into contact with the inner peripheral surface of the annular step part (36a) on the egg rod (39) extending downward.
and connecting pipe 3G) large guide piece (40
b), and a patchkin (4I) is interposed between the two. This packing (41) uses the upper end surface (36b) of the annular stepped portion (36a) as a valve seat.

(42) A pressure-receiving rod that receives the protruding shaft (38), and the same element (
42) has a cylindrical main body (44) coaxially attached to the connecting pipe (36) by means of a joint (43) that connects the hose (hJ) and the connecting pipe (3G). (44) is a flange (44b) with a through hole (44a>).
) and a cylindrical body part (44c) extending downward from the flange (44b) and opening at the lower end.
4c), a pressure receiving body (45) is disposed so as to be freely movable. This pressure receiving body (45) is urged toward the lower end opening side by a spring (46), and is prevented from falling off by a retaining ring (47).

With the various components arranged within the connecting pipe (36),
A high temperature shutoff valve (H) is configured to automatically close the flow path when the mixed hot water flowing down from the outflow chamber (11) to the shower head reaches a predetermined temperature.

Next, the spout opening/closing valve (C) is an automatic closing type that opens by pressing a lever handle provided on the front surface of the main body (11) and automatically returns to the closed state by releasing this pressure.

As is clear from Figure 2, the bulkhead 00) has an annular opening (10a) that is included in the vertical plane, and a cylinder on the back side of the main body (11) coaxially with the annular opening (10a). The annular opening (10a) is screwed onto the front side of the main body (11) in the water spout side chamber (12).
) is formed with an opening (not shown) having a threaded portion coaxially with the cylindrical case (
50) is mounted with its tip supported within the bushing (10b) and its midway supported by the annular opening (10a).

A spindle (5I) that is moved back and forth in the axial direction by a lever handle (70) is built into the case (50).

In addition, a mixed water outlet (52) is provided in the case (50) in the water discharge true chamber (I2), and a valve seat (53) and a valve seat hole (52) are provided inside the case (50) in the mixing chamber (8).
4) respectively.

Furthermore, a valve body (56) is attached to the spindle (51), and the valve body (56) has a gasket (55) attached to the front side that approaches and separates from the valve seat (53). Built-in so that it can slide in the axial direction in a watertight manner. The spring (57) biases the valve body (56) toward the valve seat (53), and when not in operation, the valve body (56) remains seated on the valve seat (53) as shown in the figure. I can do it. Furthermore, there is a mixed water inlet (58) located close to the valve seat (53).
is opened and one valve body (56) is opened from the valve seat (53), the mixed water in the mixing chamber (8) flows into this mixed water inlet (5
B) The mixed water flows down through the valve hole (54) from the outlet (52) into the water spout side chamber (12) and can be discharged from the spout (12a). Incidentally, the spout (12a) is attached to the main body (1) so as to be able to freely swing.

Furthermore, the storage space behind the valve body (56) is communicated with the mixing chamber (8) by a pressure reducing plate (60) with a small hole (59), and the valve closing operation is controlled by the regional pressure plate (6o) and the storage space. It can be substantially defined as a pressure chamber (P).

To open the spout on-off valve (C), use the lever handle (7
0) downward, the spindle (51) moves in the axial direction, and the valve body (56) discharges water in the pressure chamber (P) from the small hole (59) while discharging the water from the valve seat (53'). ) away from
The spout on-off valve (C) opens. If you let go of the lever handle (7o) in this state, the valve body (56) will be biased in the valve closing direction by the spring (57) and will move, but the pressure chamber (P) behind the valve body (56) will move. ) The valve body (56) gradually moves and closes as the volume of mixed water flowing into the chamber through the small hole (59) of the pressure reducing plate (6o) increases, and the lever handle (70) also returns to its original position.

Therefore, the spout opening/closing valve (C) closes shortly after the lever handle (70) is released, and a predetermined amount of mixed water is discharged from the spout t (12a) during that time.

The spout on-off valve (C) may be of a self-closing type or may be of a structure that is manually opened and closed by rotating a handle or the like.

In the above configuration, when the shower on-off valve (B) is opened, mixed water from the mixing chamber (8) flows into the shower side outflow chamber (
II) and flows down toward the connecting pipe (3G).

At this time, the temperature sensor case (3
7) and the various members integrally connected to the case are floated by the force of the mixed water, and the gasket (41) separates from the upper surface (36b) of the annular step (36a) to open the valve.

As the temperature sensor case (37) floats, the protruding shaft at the upper end (
38) comes into contact with the pressure receiving body (45), and in this state mixed water is supplied to the shower side. In addition, the shower side on-off valve (B
Even if the temperature sensing element (37) suddenly rises due to the inflow of mixed water when the valve is opened, the pressure sensing element (45) is supported by the spring (46), so the protruding shaft (3 days) will elastically receive the pressure. body(
45) and damage to the temperature sensitive body case (37) can be prevented.

Here, pressure fluctuations in the water supply pressure, overheating of the hot water supply source, or opening the shower on-off valve (B) and accidentally opening the shower on-off valve (C) while taking a shower may occur.
) or rotating the control valve handle (22) to the high temperature side, the temperature may be higher than the temperature set by the control valve (A) <i1! The behavior of the high-temperature cutoff valve (H) at stage J will be described.

As the temperature of the mixed water passing through the high temperature cutoff valve (H) rises, the wax inside the thermosensitive body case (37) expands, and the protruding shaft (38) gradually begins to extend. Therefore, the protruding shaft (38)
As the protruding amount of
trying to sit down. When the temperature of the mixed water exceeds the upper limit of the safe range for shower use, the wax further expands due to the influence of heat, and as the protruding shaft (38) extends, the punkin (41) seats and closes the valve.

When the mixed water temperature reaches the desired temperature, the high temperature shutoff valve (H)
To configure the valve to close, the coefficient of thermal expansion of the wax,
The length of the protruding shaft, the distance F41 between the temperature sensitive body case (37) and the pressure receiving body (45), etc. may be taken into consideration.

As described above, high-temperature mixed hot water is not supplied to the shower side, and the shower can be used safely even if lightning occurs in the water supply source during operation or if there is an erroneous operation.

FIG. 3 is a sectional view showing a second embodiment of the high temperature cutoff valve (H), and this embodiment has a check valve type structure.

The connecting pipe (3G) has a bushing (35
) to the outflow chamber (11) on the shower side, and a plug (80) is screwed to the lower end. Further, a valve seat cylinder (81) is screwed onto the upper part of the bent part, and a gasket (82) that comes into contact with and separates from the upper end surface (81a) of the valve seat (81) has a guide body (83) attached to its lower part. It is installed in the same condition. (84) is the valve seat cylinder (81) and the guide body (
83) is a spring that biases the packing (82) in the direction to seat it, and this spring (84)
) to keep the valve open and closed so that the mixed water does not flow out.

(85) is a pressure receiving body fixed to the connecting pipe (36) by a joint (43), and has a required number of through holes (86) to communicate the boss (hl) and the connecting pipe (36).

(87) is a shape memory alloy spring that has a shape memory effect, and has a length and urging force that allows the packing (82) to sit as shown in the figure at room temperature, and when the temperature rises to a temperature T, the shape memory effect occurs. It is heat-treated so that it returns to its original state, and can be configured as a temperature-sensing section by utilizing the deformation caused by this heat. That is, it can be freely expanded and contracted and deformed up to a temperature T, but when it exceeds this temperature Ttl, it stretches to its original state after being heat-treated under the above conditions, and the packing (82) is attached to the valve seat cylinder (81). The valve can be closed when seated.

The high temperature shutoff valve (H) is formed by the above two components, and the behavior when the mixed water flows out will be described below.

When the shower on-off valve (B) is opened, the outflow chamber (11)
Mixed hot water at a set temperature is supplied into the connecting pipe (37), and the water force of this mixed water is applied to both springs (84) and (87).
), the gasket (82) rises and opens the valve, allowing the hose (hl) to feed mixed water.

Here, the connection pipe (
36) When the temperature of the mixed water flowing down exceeds the above temperature, the shape memory alloy spring (87) expands due to its shape memory effect and deforms to return to its original state. Therefore, the gasket (82) is seated on the valve seat cylinder (81) and the valve is closed, and the shower can be used safely without high temperature mixed hot water being discharged from the shower.

FIG. 4 is a sectional view showing a third embodiment of the high temperature shutoff valve (H), and this example is a shower on-off valve (B) with an automatic shutoff component added.

A vertically elongated hole (90) is bored in the axial direction from the lower end of the valve stem (31), and a punching support body (91) with 1 and 1' and J positions is installed in the vertical hole (90). Support (9
1) forms an annular seat (92). (93)
is a shape memory alloy spring interposed between the valve stem (31) and the packing support (9I), which is expandable and contractible at room temperature, but is shape memory heat treated so that it expands when a certain temperature T is exceeded. , it can be configured as a temperature sensing section similarly to the second embodiment.

If the shape memory alloy spring (93) is configured to have its natural length in the valve closed state shown in FIG. 4, that is, at room temperature, the biasing force in this state is zero.

In the above configuration, when the handle (30) is rotated, the valve shaft (31) rises and the seal (34) moves against the valve seat (33).
), the valve opens and mixed water is supplied to the hose (h1 direction).

When the temperature of the mixed water exceeds a certain temperature T due to some reason, the shape memory alloy spring (93) expands due to its shape memory effect, and the seal (34) seats on the valve seat (33) and closes. speak.

Therefore, when the mixed water reaches a high temperature, the flow path to the Bose (h) side is automatically shut off, so that the high temperature water can be used safely without being discharged.

Incidentally, in any of the three embodiments described above, since a high temperature cutoff valve is not provided in the spout side flow path, mixed water can be continuously supplied to the lotus and the washing area regardless of the temperature.

[Brief explanation of drawings]

FIG. 1 is a front cross-sectional view of a hot water mixing faucet according to the present invention, FIG. 2 is a side cross-sectional view of the same, FIG. FIG. 7 is a cross-sectional view of main parts showing a third embodiment. (1) Main body (4) Water channel (5) Hot water channel (12a) Spout (30) Operation handle (shower opening/closing handle) (3
7) Temperature sensor case (temperature sensor) (70) Lever handle (opening/closing handle for spout) (
87) , (93) Shape memory alloy spring (temperature sensing part) (A) Control valve (B) Shower on-off valve (C) Spout on-off valve

Claims (1)

[Claims] 1. It has a hot water flow path, a water flow path, and a mixing water flow path where the two flow paths join together via a control valve that manually adjusts the mixing ratio of hot water and water, and further has a spout opening/closing handle. A spout opening/closing valve that is operated to open and close to supply mixed water) and a shower opening/closing valve that is opened and closed by a shower opening/closing handle to supply mixed water to the shower are each provided in the middle of the mixed water flow path. There it is,
A temperature sensing part that is sensitive to the temperature of the flowing mixed water in the mixed water flow path downstream of the shower on-off valve or the valve part;
A hot water mixing faucet characterized by being equipped with a high temperature cutoff valve that is operated by the temperature sensing part and automatically opens and closes a flow path according to the temperature of the mixed water.