JPH0668339B2 - Temperature control device for automatic mixing faucet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an automatic mixing faucet provided at a hot water outlet of a hot water supply facility, which is equipped with a temperature adjusting device for setting a desired hot water temperature. Regarding improvements.

[Prior Art] An automatic mixing faucet A is usually equipped with a water inlet 10 connected to a water supply pipe such as a water tap and a hot water inlet 11 connected to a hot water supply pipe of a hot water supply facility such as a boiler, as shown in FIG. In the body 1 provided with the mixed water outlet 12 for taking out the mixed water, a mixing chamber 13 for mixing the water taken in from the water inlet 10 and the hot water taken in from the hot water inlet 11 is provided, and water for this mixing chamber 13 is provided. Water valve 14a for controlling the inflow of water from the inlet 10 and the hot water inlet 1
A hot water valve 14b for controlling the inflow amount of hot water from 1 is provided with a cylindrical mixing valve 14 formed at both free ends in the axial direction, and the mixing valve 14 is provided with the mixing water in the mixing chamber 13. The thermoelement 2 for automatically controlling the opening of the water valve 14a and the hot water valve 14b according to the temperature is connected and assembled, and the body 20 of the thermoelement 2 is arranged in the protruding direction of the piston 21 that moves in and out. It is pushed out by a spring 22, and the protruding end of the piston 21 is supported by the adjusting screw 3 via the guide 4 and the escape spring a, and the outer periphery of the lower half side of the adjusting screw 3 is brought to the end of the body 1. The assembled cylindrical holder 5 is screwed onto the inner peripheral side so as to be freely rotated and displaced in the direction of the piston 21 moving in and out, and the outer periphery of the upper half side of the adjusting screw 3 is attached to the dial D. On the inner circumference of the cylindrical part provided on the lower half side of the support fitting 6 integrally fixed by the set screw 60, the sp The piston 21 is fitted so as to freely slide in and out by the line fitting, and the supporting metal fitting 6 is fitted and supported on the cylindrical holder 5 so as to be rotatable only. .

When the dial D is rotated in the forward or reverse direction, the support metal fitting 6 integrally connected to the dial D and the adjustment screw 3 engaged in the rotation direction via the spline are rotated together, and When the adjusting screw 3 is screwed with the holder 5, the adjusting screw 3 slides with respect to the support fitting 6 and is displaced in the holder 5 toward and away from the piston 21, and is pushed upward by the spring 22 in FIG. The position for pressing the head of the piston 21 of the element 2 is changed up and down in FIG. 1 so that the operating temperature of the thermoelement 2 can be set as desired.

As a result, when the temperature of the mixed water in the mixing chamber 13 becomes higher than the set temperature set by the rotating operation of the dial D, the piston 21 extending thereby causes the body 20 of the thermoelement 2 to move to the spring 22. By pushing up against the bias, the mixing valve 14 assembled to the body 20 is moved downward in FIG. 1 to expand the opening degree of the water valve 14a on the upper edge side of the mixing valve 14 and to increase the mixing valve 14 14b at the bottom edge of the
The operation of decreasing the temperature of the mixed water in the mixing chamber 13 is narrowed, and when the temperature of the mixed water in the mixing chamber 13 is lower than the set temperature, the piston 21 is pushed out. Due to the decrease in pressure, the body 20 of the thermoelement 2 is pushed up by the spring 22, the mixing valve 14 moves in the opposite direction to the above, and the mixing chamber 13
It operates so as to raise the temperature of the mixed water therein, whereby the mixed water having the set temperature set by the operation of the dial D is taken out from the mixed water outlet 12.

[PROBLEMS TO BE SOLVED BY THE INVENTION] Therefore, the automatic mixing faucet A includes a dial D and a body 1.
A scale for displaying the angle of rotation of the dial D is provided between and, and if the temperature indicated by the scale is selected and the dial D is turned, the scale is provided on the body 1. When the hot water handle (H) is operated to take out hot water (mixed water) from the mixed water outlet 12, the hot water of the temperature set by the dial D should always be taken out. , The dial D may move by itself and the set temperature may have changed. When operating the water stop handle H to take out hot water, I think it is necessary to check the indicated position on the dial D scale. There is a problem that an accident may occur when hot water is taken out.

To this end, the rotating operation of the dial D may be hardened so that the rotated dial D does not move from that position. However, when doing so, the operation of rotating the dial D to change the set temperature. However, there is another problem that the operation of the dial D cannot be performed smoothly.

The present invention has been made in order to solve this problem that has occurred in the conventional means, while changing and adjusting the set temperature by operating the dial D can be performed lightly with almost no force. An object of the present invention is to provide a new means capable of reliably preventing the temperature set by the rotating operation of the dial D from moving when the hot water is not taken out.

[Means for Solving the Problem] However, the present invention has been completed based on the findings obtained by repeating various studies and experiments for the above purpose. That is, the adjusting screw 3 which operates to displace the position of the thermoelement 2 that supports the piston 21 by rotating with the dial D is not too hard or too soft when rotating with the dial D. It is uncomfortable and is set to an optimum hardness, but the hardness is screwed when the adjusting screw 3 is pushed up by a strong force from the piston 21 side of the thermo element 2 which is in contact with it. It is hard to rotate with respect to the holder 5. By the way, when the temperature is set by operating the dial D, the hot water introduced into the body 1 of the automatic mixing faucet A from the hot water inlet 11 is at a high temperature, and therefore the thermoelement 2 is pushing out the piston 21. In, there is a case where the dial D is turned to the low temperature side to move the adjusting screw 3 so as to descend, and thereby the temperature is set to a low temperature. In this case, the descending adjustment screw 3 is
Even after pressing the spring 22 downward while compressing the spring 22 until the hot water valve 14b on the lower end side of the mixing valve 14 attached to it abuts the valve seat 15 facing it and does not move downward. Further, the thermoelement 2 is pushed downward, and thereby, the relief spring a, which is set to a spring pressure much stronger than the spring 22, is pushed and contracted. Then, in this state, when the hot water is not used and is left as it is, the adjusting screw 3 is continuously pushed up by the strong spring pressure of the flexed escape spring a. Causes the adjustment screw 3 to rotate little by little,
Along with that, the phenomenon of turning dial D to the loosening side (high temperature side) began to occur, and it was found that this caused the set temperature to move.

From this, the force when the piston 21 of the thermoelement 2 is pushed out in a state where the hot water valve 14b of the mixing valve 14 collides with the valve seat 15 and the movement of the thermoelement 2 is locked. The escape spring a for escape is divided into a first escape spring a-1 and a second escape spring a-2, and the first escape spring a-1
The escape spring a-1 is stretched between the adjusting screw 3 and a guide 4 movably provided in the adjusting screw 3 in the direction in which the piston 21 moves in and out, so that the guide 4 is pushed toward the piston 21. , The second relief spring a-2, the guide 4 and the support fitting 6
The guide 44 is stretched so as to be pushed out toward the piston 21 between the and, and the guide 4 is pushed up by the extension of the piston 21 in the above-described state, and the first relief which is compressed and contracted thereby. When the adjusting screw 3 is pushed up by the spring a-1, the second escape spring a-2 pushes the adjusting screw 3 downward, and the adjusting screw 3 bends. This is due to the result that the spring pressure of 1 effectively prevents the start of movement from the set position.

From this, therefore, in the present invention, as a means for achieving the above-mentioned object, the guide for supporting the head of the piston of the thermoelement assembled with the mixing valve in the body and the guide are described above. A first escape spring for movably supporting the piston in the moving direction of the piston and for pushing the adjusting screw in the protruding direction of the piston between the adjusting screw and the adjusting screw screwed to the body so as to be displaced in the moving direction of the piston by rotation. A second relief spring that pushes the guide toward the piston between the support metal of the dial and the guide that is assembled to the body by engaging the adjustment screw only in the rotational direction. The present invention provides a temperature control device for an automatic mixing faucet characterized by the above.

[Embodiment] Next, an embodiment will be described in detail with reference to the drawings. The same reference numerals as those used in the conventional means are used for the constituent elements having the same effect.

FIG. 2 is a partially cutaway cross-sectional view of an automatic mixing faucet A according to the present invention. In FIG. 2, 1 is a body, 2 is a thermoelement, 3 is an adjusting screw, 4 is a guide, 5 is a holder, 6 is a support bracket H is a waterproof handle, D is a dial, a
Shows a relief spring divided into a first relief spring a-1 and a second relief spring a-2.

The body 1 is formed in a shaft cylinder shape that is long in the left and right, and a water inlet 10 and a hot water inlet 11 are opened in the rightward portion on the rear surface side (upper surface side in FIG. 2) of the peripheral wall. Water inlet pipe 10
0 and the hot water inlet pipe 110 are connected to each other, a dial D is rotatably connected to the right end side, and a water stop handle H is rotatably connected to the left end side. Further, at the left side portion on the front surface side, a water guiding pipe portion 16 having a mixed water outlet 12 formed on the lower surface side is projected in the shape of an arm projecting forward, and on the bottom surface side, as shown in FIG. A connection port 17 for connecting the base end of the hose 70 of the shower 7 shown is opened. Inside the cartridge, the cartridge 8 containing the mixing valve 14, the thermoelement 2 and the mixing chamber 13 is fitted in the rightward portion as shown in FIG. 3, and the cartridge 8 is fixed in the leftward portion. A water-stop switching mechanism 9 that stores the water-stop state and the state in which the water mixture is guided to the water mixture outlet 12 and the water mixture is led to the connection port 17 of the shower 7 is stored by rotating the water handle H. I am doing it.

The mixing valve 14 and the thermoelement 2 and the mixing chamber which are housed in the cartridge 8 and mounted in the body 1
13 is the same as that of the conventional means, and the body 20 includes the thermoelement 2 including a body 20 in which a temperature-sensitive substance whose volume expands due to temperature rise is enclosed and a piston 21 extruded by the expansion of the temperature-sensitive substance. The piston 21 is located in the mixing chamber 13 and is installed in the cartridge 8 in a posture in which the piston 21 is directed to the right. The body 20 of the piston is pushed rightward by the spring 22, and the water valve 14a is attached to the body 20 on the right end side. The mixing valve 14, which is provided with a hot water valve 14b on the left end side and is formed into a tubular valve shape, is integrally connected and assembled, and the head of the piston 21 of the thermo element 2 protruding from the cartridge 8 is attached to the right end of the body 1. The adjusting screw 3 mounted on the side is movably supported in the moving direction of the piston 21 and abuts against the guide 4 which is pushed toward the piston 21 by the escape spring a. Hot water inlet In accordance with the temperature of the mixed water flowing into the mixing chamber 13 from 81, the mixing valve 14 is automatically operated, and water and hot water flowing into the mixing chamber 13 from the water inlet 80 and the hot water inlet 81. The mixed water outlet 12
It is configured to keep the temperature of the hot water taken out from the tank constant.

The adjusting screw 3 has a base end side (left end side in FIG. 2) outer circumference formed on a cylindrical shape and is attached to the right end side of the body 1 by an inner circumference of a holder 5, which is rotated in the left-right direction. To the inner circumference of the support fitting 6 which is screwed by screw fitting so that the outer circumference on the tip side is rotatably fitted and supported in the inner cavity of the holder 5 by spline fitting. Depending on the joint, it is linked to the support metal 6 so that it can slide left and right
When the dial D is fixedly connected to the support fitting 6 via the set screw 60, when the dial D is rotated, the dial D is rotated integrally with the dial D and is displaced laterally with respect to the holder 5 by screw fitting with the holder 5. I am doing it.

Then, the relief spring a provided to release the expanding pressure of the piston 21 in the state where the thermo element 2 presses and contracts the spring 22 is the first relief spring a-1 and the second relief spring a-2. The first relief spring a-1 is stretched between the adjusting screw 3 and the guide 4 so as to push the adjusting screw 3 toward the right side, and the second relief spring a-1 is also divided. a-2
Is stretched between the guide 4 and the support fitting 6 so as to push the guide 4 toward the left.

In addition, the water stop switching mechanism 9 has a position shown in FIG.
Connection port 17 between mixing chamber 13 and shower 7 and mixed water outlet
When the water stop handle H is rotated 90 degrees in the forward rotation direction, which is the position of the water stop that cuts off the communication with 12, the inner hole of the water stop 90 communicates with the communication port 18 and at the same time, the switching valve. When 91 moves to the right and the mixed water flows to the mixed water outlet 12 side and the water stop handle H is rotated in the reverse direction, the inner hole of the water stopcock 90 communicates with the communication port 18, and at the same time, the switching valve 91 As shown in FIG. 5, it moves to the left so that the mixed water flows toward the connection port 17 side with the shower 7.

[Effects of the Invention] As described above, in the temperature control device for the automatic mixing faucet according to the present invention, the relief spring a for releasing the pressure when the piston 21 is extended is the first relief spring a-1. And a second relief spring a-2, the first relief spring a-1 of which is adjusted between the guide 4 supporting the head of the piston 21 of the thermoelement 2 and the adjusting screw 3. It is applied so that the screw 3 is pushed out in the protruding direction of the piston 21,
Since the second relief spring a-2 is hung between the support fitting 6 of the dial D and the guide 4 so as to push the guide 4 toward the piston 21, the set temperature is set to rotate the dial D. When the thermoelement 2 pushes the mixing valve 14 to the stroke end where the hot water valve 14b abuts against the valve seat 15 while the thermoelement 2 compresses the spring 22, the piston 21 of the thermoelement 2 is set to a high temperature. When the adjustment screw 3 is pushed out by the first relief spring a-1 in the extension direction of the piston 21, the second relief spring a-2 pushes back the guide 4 and the first relief spring Since the spring pressure of the first escape spring a-1 applied to the adjusting screw 3 is reduced by acting to cancel the spring pressure of the escape spring a-1, the rotating operation of the adjusting screw 3 by the operation of the dial D is a light force. It becomes so performed. Then, the spring pressure of the first relief spring a-1 acting on the adjusting screw 3 is canceled by the second relief spring a-2, so that the relief spring is bent when the set temperature is set high. Adjusting screw 3 turns with strong spring pressure, and dial D moves by itself to change the set temperature.
Effectively prevent it.

[Brief description of drawings]

FIG. 1 is an explanatory view of an automatic mixing faucet, FIG. 2 is a partially cutaway plan view of an automatic mixing faucet for carrying out the present invention, and FIG. FIG. 4 is a partially cutaway plan view of the shower connected to the automatic mixing faucet, and FIG. 5 is a transverse cross-sectional view of the water shut-off mechanism portion. Description of drawing symbols A: Automatic mixing faucet, D: Dial H: Water stop handle, a: Relief spring a-1: First relief spring a-2: Second relief spring 1 ... Body , 10 …… water inlet 11 …… hot water inlet, 12 …… mixed water outlet 13 …… mixing chamber, 14 …… mixing valve 14a …… water valve, 14b …… hot water valve 15 …… valve seat, 16 …… Water conduit 17 …… Connection port, 18 …… Communication port 100 …… Water inlet pipe, 110 …… Hot water inlet pipe 2 …… Thermo element, 20 …… Body 21 …… Piston, 22 …… Spring 3 …… Adjustment Screws 4 …… Guide 5 …… Holder, 6 …… Supporting metal 60 …… Set screw, 7 …… Shower 70 …… Hose, 8 …… Cartridge 80 …… Water inlet, 81 …… Hot water inlet 9 …… Water stop switching mechanism, 90 ... Water stopcock 91 ... Switching valve

Claims (1)

[Claims] 1. A guide 4 for supporting a head of a piston 21 of a thermoelement 2 assembled in a body 1 with a mixing valve 14 assembled therein, and a guide 4 movably supported in a direction in which the piston 21 moves in and out. The first relief spring a-1 that pushes the adjusting screw 3 in the projecting direction of the piston 21 is provided between the adjusting screw 3 and the adjusting screw 3 that is screwed into the body 1 so as to be displaced in the direction in which the piston 21 moves in and out by rotation. A dial D that is attached to the body 1 by tensioning it and engaging it with the adjusting screw 3 only in the rotational direction.
A second relief spring a-2 for pushing the guide 4 toward the piston 21 is stretched between the support metal fitting 6 and the guide 4 of FIG.