JPH0149534B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a hot water mixing method in which hot water and water are mixed to obtain mixed hot water at a desired temperature.

(Prior Art) A conventional hot water mixer faucet using this type of method will be explained with reference to FIGS. 1, 5, and 8.
Note that FIGS. 1 and 5 are also diagrams for explaining a hot water mixing faucet according to an embodiment of the present invention.

In the figure, 1 is the mixing faucet main body, 13a is the hot water passage, 13
b is a water passage, and 6 is a mixing passage. A fixing plate 8 is provided inside the mixing faucet main body 1, and this fixing plate 8
A hot water inlet 4 and a water inlet 5 which are connected to the hot water passage 13a and the water passage 13b, respectively, are bored in the hot water inlet 4 and a water inlet 5 which are connected to the hot water passage 13a and the water passage 13b, respectively, and a mixing hot water outlet 7 which is connected to the mixing passage 6 is bored at a different position from these. ing. Reference numeral 9 denotes a movable plate superimposed on the fixed plate 8 in a watertight manner and rotatably slidable, and the sliding surface 8a of the movable plate 9 with respect to the fixed plate 8 has a shape depending on its rotational position. ,
A concave flow path 10 is provided which determines the opening degrees of the hot water inlet 4 and the water inlet 5, mixes the hot water and water flowing in from both the inlets 4 and 5, and causes the mixture to flow out into the mixing path 6.

Reference numeral 23 denotes a drive unit for rotating the movable plate 9, and the upper end 25a of the rotation shaft 25 provided on the drive shaft 24 meshes with the wavy engagement portion 9a provided at the bottom of the movable plate 9. There is.

In this configuration, the fixed plate 8 and the movable plate 9 have a relationship as shown in FIGS. 5 and 8. Figure 5 shows a sectional view taken along line Y-Y in Figure 1, and Figure 8 shows Figure 5D.
A corresponding enlarged view is shown. A shows a state in which the movable plate 9 is not driven to rotate at all. In this state, both the hot water inlet 4 and the water inlet 5 are closed by the movable plate 9, and hereinafter this state will be referred to as a fully closed state.
B shows a state in which the movable plate 9 rotates in the direction of arrow E from the fully closed state shown in A, and only the water inlet 5 is fully opened. When the movable plate further rotates, the water inlet 5 is gradually closed as shown by C, and the hot water inlet 4 is gradually opened, and eventually the hot water inlet 4 is fully opened as shown by D, and the water is completely closed. The inlet 5 is completely closed and the hot water side is fully open. In this hot water side fully open state, the movable plate 9 is located at the end of rotation, and further rotation in the direction of arrow E is restricted.

In addition, as shown in FIG. 8 with an enlarged view of FIG.
The position is such that the movable plate 9 is further rotated approximately 5 degrees in the direction of arrow E from the fully open position.
is rotated about 5 degrees more in the direction of arrow E than the fully closed position.

This is to maintain sufficient watertightness between the fixed plate 8 and the movable plate 9 and to ensure that the hot water inlet 4 can be fully opened.

The temperature of the mixture thus obtained can be changed by rotating the movable plate 9 relative to the fixed plate 8 and changing the mixing ratio of hot water to water.For example, in any usage condition, the temperature of the mixed hot water can be further increased. Mixed hot water at a desired temperature can be obtained by rotating the movable plate 9 in the direction of arrow E when desired, and vice versa in the direction of arrow F when desired to lower the temperature. When the hot water side is fully opened as shown in FIG. 5D or FIG. 8, the highest temperature water is obtained, and in the state B, the lowest temperature water is obtained.

(Problems to be Solved by the Invention) In this hot water mixing method, the movable plate 9 is engaged with the drive shaft 25 and rotated, and stopped at an appropriate position to determine the hot water mixing ratio. It prepares for the next rotation for temperature adjustment, but generally when adjusting temperature, the response speed is considered and the output repeatedly overshoots and undershoots the set temperature until it converges to the set temperature. During this control, the movable plate 9 alternately rotates in opposite directions.

Therefore, as described above, since the movable plate 9 and the drive shaft 25 are connected by meshing, there is a backlash, and when the movable plate reverses, the responsiveness deteriorates accordingly. In particular, when the hot water side is fully open as shown in FIG. 8, the movable plate 9 will always rotate in the opposite direction in the next operation, so at least in such a state It is desirable to return the drive shaft 25 in the opposite direction even by the amount of backlash.

The present invention has been made in response to such a need, and its object is to provide a hot water mixing method that can minimize the reduction in response speed due to backlash.

(Means and effects for solving the problem) In order to solve the above problem, the present invention rotates the movable plate 9 connected to the drive shaft 25 of the drive unit 23 including a motor etc. over a finite angle. The rotation position of the movable plate 9 adjusts the opening ratio between the hot water passage 13a and the water passage 13b, and at the end of rotation of the movable plate 9, the opening ratio of the hot water passage 13a is adjusted.
In the hot water mixing method in which either one of the water passages 13b and 13b is fully opened, when the movable plate 9 reaches the end of rotation, the drive shaft 25
Since it is prepared for the next rotation in the opposite direction at the position where it is rotated in the opposite direction by a predetermined angle,
At least at the end of the rotation, the influence of backlash can be eliminated and the response speed can be increased.

(Example) Hereinafter, the present invention will be explained based on the accompanying drawings.

FIG. 1 is a partially cutaway sectional view showing a hot water mixing faucet, and FIG. 2 is a view taken in the direction of the arrow in FIG. The hot water mixing faucet has a valve chamber 1a formed inside the mixing faucet main body 1, and a hot water passage 1 in a partition wall 1b that forms the upper surface of the valve chamber 1a.
3a, a hot water hole 14 communicating with the water passage 13b, a water hole 15, and a mixed water hole 16 communicating with a flow rate sensor 12, which will be described later, are formed, respectively.

The lower surface of the valve chamber 1a is open, and a bottom cover 17 is screwed into this opening, and a cartridge case 18 and an inner cover 19 for the temperature control valve 11 are installed inside the valve chamber 1a. do.

The cartridge case 18 is formed into a bottomed cylindrical shape with an open bottom, and is non-rotatably stored in the valve chamber 1a with the bottom facing up. A hole 15 and a mixed water passage hole 16 are respectively drilled.

This cartridge case 18 has an outer lid 1.
By tightening the screws 7, the valve chamber 1a is opened through the inner cover 19.
Press on the inner top surface.

The means for making the cartridge case 18 unrotatable with respect to the valve chamber 1a is the cartridge case 1.
8 is engaged with a protrusion 21 received on the upper end surface of the valve chamber 1a and a recessed hole 22 provided on the inner upper surface of the valve chamber 1a.

A fixed plate 8 is non-rotatably pressed against the inner upper surface of the cartridge case 18, and a movable plate 9 is rotatably stacked and stored on the lower surface of the fixed plate 8.

These fixed plate 8 and movable plate 9 are connected to the temperature control valve 11.
The fixed plate 8 is connected to the hot water hole 14, the water hole 15, and the mixed water hole 14 of the mixer faucet body 1 through the holes 14, 15, and 16 of the cartridge case 18, respectively. a hot water inlet 4 communicating with the water passage 16;
A water inlet 5, a mixed water outlet 7 are provided, and a movable plate 9 is provided.
A concave passage 10 is provided on the sliding surface of the movable plate 9 to communicate one or both of the hot water inlet 4 and the water inlet 5 with the mixed water outlet 7 when the movable plate 9 is in the open position.

The concave channel 10 has a shape as shown in FIG.
The movable plate 9 is recessed so as to be symmetrical with respect to the symmetry axis of the movable plate 9.

A wavy engagement portion 9 is provided on the lower surface of the movable plate 9.
a, and by engaging the upper end of the drive shaft 25 connected to the output shaft 24 of the drive section 23 provided at the lower part of the mixing faucet main body 1 with this engaging portion 9a, the movable plate 9 can be rotated in both left and right directions. It is configured to move and its rotation is restricted at a predetermined position.

This drive section 23 includes a motor 23a, a drive transmission mechanism section 23b that decelerates the rotation by the motor 23a and rotates the drive shaft 25, and a rotational position of, for example, a rotary plate 1 that constitutes the drive transmission mechanism section 23b. and a position detector 23c that can detect the rotational position of the movable plate 9 by detecting the rotation position of the movable plate 9.

The mixed water mixed at a predetermined ratio by the temperature adjustment valve 11 passes through the watertight packing 26 fitted in the through hole 20, flows into the mixing passage 6 in the upper part of the mixing faucet main body 1, and the flow rate The sensor 12 is reached.

The flow rate sensor 12 includes a casing 27 that has a storage chamber 27a that opens at the bottom and an outlet 28 that communicates with an opening 27b of the chamber 27a, and a sleeve 27 that is screwed and glued inside the casing 27. It is pivotally supported inside the sleeve 29 to be attached.
An impeller 30 rotates in response to hot water flowing through the sleeve 29, a magnet 32 integrally provided on the rotating shaft 31 of the impeller 30, and rotation of the impeller 30 by detecting the magnetic field of the magnet 32. The opening 27b of the casing 27 is screwed and fixed to the mixing faucet main body 1 by screwing and fixing the joint 1c protruding from the outer upper surface of the mixing faucet main body 1, and integrally joined to the main body 1. do.

Therefore, the mixed hot water that has flowed into the flow rate sensor 12 from the mixing passage 6 of the mixing faucet main body 1 rotates the impeller 30 in the sleeve 29 and then passes through the sleeve 29.
Storage chamber 27a from outflow hole 29a bored in the peripheral surface
The liquid flows to the outlet through a circumferential flow path 34 formed on the outer periphery of the sleeve 29.

In addition to the flow rate sensor 12 described above, the hot water mixing faucet described above includes a temperature sensor 35 that protrudes into the circumferential flow path 34 of the casing 27 and consists of a thermistor that detects the temperature of mixed water, and a rotation detector 33 and a temperature sensor 35. The detection signal is sent to the control section 36.

FIG. 3 shows a signal transmission path between the sensors 12, 35, position detector 23c, motor 23a, etc. and the control section 36, and FIG. 4 shows a block diagram of these structures.

The control unit 36 is electrically connected to the flow rate sensor 12, the temperature sensor 35, the motor 23, the position detector 23c, the operation unit 37, and the power source, and controls the set values of the water discharge amount and mixed water temperature input to the operation unit 37. , the detection signals from the temperature sensor 35, the flow rate sensor 12, and the position detector 23c are input, and the drive section 23 is driven based on the signals to move the movable plate 9 of the temperature adjustment valve 11 to a predetermined position. Make it rotate.

FIG. 5 shows the positional relationship between the movable plate and the fixed plate as shown in the prior art, and A indicates the movable plate 9.
B is a fully closed state where only the water inlet 5 is fully open, C is a state where both are open at an arbitrary opening ratio, and D is a state where the water inlet 4 is fully open.
Only the hot water side is fully open.

FIG. 6 is an enlarged view of FIG. 5D, in which one end 10a of the concave channel 10 provided in the movable plate 9 substantially coincides with one end 4a of the hot water inlet 4. That is, this is the position where the drive shaft 25 is reversed by a predetermined angle from the conventional hot water side fully open position shown in FIG. 8, and the movable plate 9 is returned to its original position by about 5 degrees (rotated in the direction of arrow F). The hot water side is in the fully open position.

FIG. 7 is a diagram showing an example of the configuration for performing such an operation. When the movable plate 9 reaches the fully open position on the hot water side according to the output signal from the position detector 23c in the control unit 36, the fully open position determining means 54 outputs a signal by referring to the value in the memory 50 that stores the hot water side fully open position, and causes the motor to move backward through the motor drive circuit 53, and at the same time drives the comparison means 52.
The memory 50 stores the position of the movable plate 9 in the state shown in FIG. A comparison means 52 determines when the output signal of this calculation means and the output signal of the position detector 23c become equal, and the output value of the comparison means 52 is calculated. The signal causes the drive circuit 53 to stop driving the motor. Therefore, with this configuration, when the hot water inlet 4 is throttled from the hot water side fully open state to lower the temperature of the mixed hot water, the rotating operation of the movable plate 9 by the drive unit 23 immediately mixes the hot water without being affected by the crushing. The operation is to lower the temperature of the hot water, and the response speed can be improved.

The mixing faucet main body 1 in this embodiment is installed in an installation chamber 40 with a door 39 recessed in the wall surface provided with a collar 38 as shown in FIG. hot water supply source 13a, water supply source 13
The mixing faucet main body 1 is screwed onto b, and the outlet 28 of the casing 27 is connected to the collar 38.

Although one embodiment of the present invention has been shown above, the present invention is not limited to the embodiment, and can take various embodiments and modifications within the scope of the technical idea of the present invention. It will be readily understood by those skilled in the art that the components can be transformed.

For example, in the case of this embodiment, the hot water inlet 4 is fully opened at the end of the rotation of the movable plate 9;
Conversely, the water inlet 5 may be fully opened,
In addition, the fully open position is set to be about 5 degrees back from the conventional fully open position on the hot water side, but it is not limited to this value, and the point is that it can be set to a value that allows the influence of backlash to be ignored. good.

In the embodiment of the present application, the angle between the hot water inlet 4 or the water inlet 5 and the width of the corresponding concave flow path 10 is made larger, but FIGS. As shown in the figure, a position returned by a predetermined angle from the rotation end position at the same angle may be set as the fully open position.

(Effects of the Invention) As is clear from the above description, according to the hot water faucet according to the present invention, for example, when trying to lower the temperature of mixed hot water from a state where the hot water side is fully open, the drive shaft rotates without being affected by backlash. This makes it possible to immediately contribute to temperature changes, and improve responsiveness in temperature adjustment.

According to this embodiment, the predetermined angle for rotating the drive shaft 25 from the hot water side fully open position is such that the one end 10a of the concave flow path 10 of the movable plate 9 is approximately 5 degrees of rotation of the movable plate 9. Since it is arranged to substantially coincide with one end side 4a of the hot water inlet 4, the rotation of the movable plate 9 by the drive shaft 25 can immediately narrow the hot water inlet 4, thereby further improving the effects of the present invention.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway sectional view showing a hot water mixer faucet, Fig. 2 is a partially sectional view taken in the direction of Fig. 1, Fig. 3 is a signal system diagram, Fig. 4 is a block configuration diagram, and Fig. 5 is a partially cutaway sectional view showing a mixer faucet. A diagram showing a fixed plate and a movable plate, FIG. 6 is an enlarged view of FIG. 5D, FIG. 7 is a diagram showing a partial configuration inside the control section, FIG. The figure is an enlarged view of another embodiment of FIG. 5D, and FIG. 10 is a diagram of another embodiment showing the prior art. In the drawing, 1 is the mixing faucet main body, 4 is the hot water inlet, 5 is the water inlet, 6 is the mixing passage, 8 is the fixing plate, 9
13a is a movable plate, 13a is a hot water passage, and 13b is a water passage.

Claims (1)

[Claims] 1. A movable plate connected to a drive shaft of a drive unit equipped with a motor etc. is rotated over a finite angle, and a hot water passage and a water passage are opened depending on the rotational position of this movable plate. In the hot water mixing method, the temperature ratio is adjusted and either the hot water passage or the water passage is fully opened at the end of rotation of the movable plate, wherein the movable plate reaches the end of rotation. When the drive shaft is rotated in the opposite direction by a predetermined angle, the drive shaft is prepared for the next rotation in the opposite direction.