JPH01279180A - Combined water mixing device - Google Patents

Abstract

PURPOSE:To uniformly obtain temperature distribution of mixed water thus contriving the stabilization of a detecting value in a temperature sensor by providing a swirl flow generating means in a combined water mixing device in its flow path. CONSTITUTION:A cold water side flow control valve 9 and a hot water side flow control valve 8 are respectively provided in a cold water side flow path 1 and a hot water side flow path 2, and a hot-cold water mixing flow path 3 is provided in the downstream side of each flow control valve 8, 9. Each flow control valve 8, 9, being based on a temperature sensor 17 in its detecting value, moves sliding by an actuator D for variably generating mixing ratio of hot water to cold water. And a swirl flow generating means 7 is provided in at least one of the cold water side flow path 1 or cold water side flow control valve 9 and the hot water side flow path 2 or hot water side flow control valve 8.

Description

[Detailed description of the invention] (b) Industrial application field The present invention relates to a hot water mixing device.

(0) Conventional technology Conventionally, in a hot water mixing valve, a hot water side flow path and a water side flow path are connected to the hot water mixing chamber through flow rate adjustment valves, and the mixed hot water is controlled by a temperature sensor installed in the mixing chamber. It is configured to control the temperature of mixed hot water by detecting the temperature and adjusting the opening degree of each flow rate regulating valve.

(c) Problems to be Solved by the Invention The above configuration assumes that the hot water is completely mixed in the hot water mixing chamber and that the mixed dry water flowing out from the hot water mixing chamber has a different temperature in each part. If the temperature of the mixed hot water flowing out from the mixing valve is not the same in each part, unevenness may occur in the temperature of the mixed hot water discharged from the hot water mixing valve. There was a drawback that if it came into contact with the temperature control, the temperature control would become unstable.

In order to solve the above-mentioned drawbacks, it is conceivable to build up a hot water mixing chamber, but in this case, there is a disadvantage that a delay is caused in temperature control.

Also, Utility Model Publication No. 56-151570 and Japanese Patent Application Publication No. 58-20
As shown in No. 3340, a device with a turbulent flow plate installed in the mixed hot water flow path and a device with a rotary movable flow rate detection means are known, but both of these devices stir the hot water after mixing. This led to the need to increase the size of the hot water mixing room, and the temperature control delay was not sufficiently improved. Furthermore, in the latter example, in the case of a hot water mixing device that does not require the provision of a flow detection means, there is a drawback that the entire device becomes expensive due to unnecessary equipment.

(d) Means for solving the problem In this invention, a water side flow rate adjustment valve and a hot water side flow rate adjustment valve are provided in the water side flow path and the hot water side flow path, respectively, so that the mixing ratio of hot water and hot water is made variable. In a hot water mixing device in which the downstream side of each flow rate regulating valve is communicated with a mixing hot water flow channel, a swirling flow generating means is provided in at least one of the water side channel or the water side flow regulating valve, or the hot water side channel or the hot water full flow regulating valve. In addition, the swirl flow generating means includes a partition wall provided between the flow rate regulating valve and the mixed hot water flow path, and a plurality of through holes diagonally formed in different directions in the partition wall. , the above flow f through the same through hole
The present invention provides a hot water mixing device characterized in that a mixing hot water flow path is configured to communicate with the downstream side of an iL adjustment valve.

(E) Functions and Effects According to this invention, one of the water flows flowing into the hot water mixing chamber from the water side flow path or the hot water side flow path flows in a swirling state, and the other flows in a non-swirling state or a swirling state. As a result, the two water streams collide in the same mixing chamber, generating active turbulence, and the hot water and hot water are mixed quickly and thoroughly.As a result, the temperature distribution of the mixed hot water flowing out from the hot water mixing chamber becomes uniform in each part, and the hot water This has the effect of eliminating unevenness in the temperature of the water discharged from the mixing valve, stabilizing the detected value of the temperature sensor, and preventing irregularities in temperature control.

(F) Embodiment The embodiment of the present invention will be explained in detail based on FIG. 1. (A)
shows a hot water mixing device, which has a valve body (4) with a water side flow path (1) and a hot water side flow path (2) drilled on the left and right sides, and a mixing hot water flow path (3) drilled on the bottom surface. A substantially cylindrical valve body sliding space is provided inside, and a hot water side valve seat (5) and a water side valve seat (6) each opening toward the inside of the space are provided at the upper and lower ends of the space. A substantially cylindrical valve body (7) is fitted inside so as to be slidable up and down, and the upper and lower ends of the valve body (7) can be freely moved into and out of contact with the hot water side valve 8 (5) and the water side valve seat (6), respectively. This constitutes a hot water side flow rate adjustment valve (8) and a water side flow rate adjustment valve (9).

As shown in FIGS. 2 and 3, the valve wood (7) has a substantially cylindrical side wall (7a) with an oblique cutout on the upper outer circumferential edge to form a contact surface (7b) with the hot water side valve seat (5). ), and the lower end edge, which is sharpened by cutting the inner peripheral edge of the lower end diagonally, serves as the contact tip (7C) with the water side valve seat (6), and the upper end of the substantially cylindrical brake body (7). is closed by a partition wall (10), and the inside of the valve body (7) below the partition wall (10) is used as a space (11) for generating turbulent flow, which will be described later. is connected to the tip (12°) of a plunger (12) extending from a minute distance stepless drive type actuator (D), which will be described later, and the valve body (7) is moved by the operation of the actuator (D). It is designed to operate vertically within the sliding space.

The partition wall (10) has N several through holes (1
3) (13)... are drilled, especially each through hole (13).
) are bored in different diagonal directions as shown in FIGS. 2 and 3 as the swirling flow generating means (H).・・・
- Generates a substantially spiral vortex flow inside the valve body (7) and the mixed hot water flow path (3) with the hot water flowing from the water side valve seat (6).
) is actively stirred and mixed with the water that has flowed into the mixed hot water channel (3) from the hot water flow path (3), and the swirling flow generating means (H) shown in FIG. Forcibly converge each streamline of hot water flowing into the mixed hot water flow path (3),
By generating turbulent flow due to the interference of each streamline, hot water and water are stirred and mixed.

In addition to the above, each through hole (13) (13)...
The mixed hot water flow path (3
) can also generate turbulent flow.

In addition, (14) in Fig. 1 is the spring for restoring the valve body (7), and due to a power outage, etc., the pressure may be extremely low! When the restraining force of the plunger (12) of the stepless drive actuator (D) disappears, the hot water side valve seat (5) is opened to prevent the risk of high temperature mixed hot water being discharged. ) is a U-shaped or Y-shaped gasket with low sliding resistance to prevent hot water from entering the actuator (D), (
16) is an O-ring to prevent leakage between the water side flow path (1) and the hot water side flow path (2).

In addition, a temperature sensor (17) is installed in the mixed hot water flow path (3), and the temperature detected by the sensor (17) is adjusted to a minute pressure of 13 iffl stepless based on the difference from a preset temperature. The operation of the drive type actuator (D) is controlled to maintain the temperature of the mixed hot water flowing out from the mixed hot water flow path (3) at a set temperature.

The minute distance stepless single drive type actuator (D) is a piezoelectric actuator that is one form of the same actuator, and as shown in FIG.
A plunger (12) is installed concentrically in a cylindrical casing ([) having front and rear walls (aHb) so as to move forward and backward along the axis. , four piezoelectric elements (e) (f) [1
1) It is constructed by arranging a piezoelectric element assembly consisting of (h).

In addition, in the illustrated embodiment, the piezoelectric element (c+) (h)
is disposed in the center of the casing (E), and is fixed to the tip of a holder (11) whose base end is fixed to the front wall (a).

In addition, (i) and (j) have their base ends connected to piezoelectric elements (g) and (h).
It is a cantilever-shaped elastic bridge that is fixed to the front and rear walls and extends toward the front and rear walls (a) and (b).

A piezoelectric element (e) is attached to the outer peripheral surface of the tip of the elastic bridge (i) (j), and a brake shoe (k) (+) is fixed to the inner peripheral surface thereof.

Of these piezoelectric elements (e) (fH(]) (h), the piezoelectric element (elf) is configured to contract when the power is turned on, and the piezoelectric elements (q) and (h) are configured to contract when the power is turned off. There is.

That is, when the piezoelectric element (e) is energized, it contracts, reduces its inner diameter, and clamps the plunger (12), and when it is not energized, it expands, expands its inner diameter, and clamps the plunger (12). ). On the other hand, piezoelectric element (9)
(h) is the plunger (12) when not energized.
The upper part is in a contracted state in the axial direction, and in the energized state, it extends over one langeer (12), increasing its total length in the axial direction.

The plunger (12) can be moved in the axial direction by controlling the four piezoelectric elements (e), m, (g), and (h) by a control device (C) to be described later.

Piezoelectric elements (e), (f), (g), and (h) are shown in FIGS. 1 and 2.
As shown in the figure, a large number of piezoelectric element pieces are connected to the plunger (12).
It is a cylindrical element formed by stacking layers in the axial direction. Electrodes are provided at both ends of the cylinder, and it is configured to operate by applying a voltage to both ends.

Note that the piezoelectric element piece can be made of, for example, piezoelectric ceramics, and such piezoelectric ceramics include AD
PZT [Pb (Zr.

'I' i ) 03 ] system, or P L Z T [P
b, L a (Z r .

Ti)03], PT (PbTiO3), or a three-component system based on PZT can be used.

In addition, piezoelectric elements (e), (f) ((1), and (b) are made by laminating a large number of thin ring-shaped piezoelectric element pieces concentrically around the axis of the plunger (12), as shown in Fig. 3. In this case, the direction of voltage application is changed by 90 degrees.

Note that in the above configuration, piezoelectric elements (e) (f) (g)
(11) can have not only a circular cross section but also a rectangular cross section, for example, and as shown in FIGS. 4 and 5,
It can also be formed from separate pieces.

Further, the plunger (12) has a brake shoe (k) (
1) Because the material is clamped many times, it is desirable to use a material with a small linear expansion I5M coefficient, high hardness, strength, cleaving resistance, and abrasion resistance, and high processing accuracy. For example, a material made of ceramic material is desirable. I can think of things.

Further, FIG. 6 shows the configuration of a control device (C) for controlling the piezoelectric actuator (D).

As shown in the figure, the control device (C) includes a microprocessor (r), an input/output interface (sHt), and a memory (U) that stores a control program for the hot water mixing valve (A).
), and the input interface (S) includes:
A temperature setting device (18) for mixed hot water and a temperature sensor (17) are connected, and a minute distance stepless drive type actuator [D] is connected to the output interface (1). A stepless distance drive type actuator (D) is operated.

Next, the minute distance stepless drive type actuator (D
) Regarding the movement of the plunger (12), see Figures 9 to 1.
This will be explained with reference to FIG.

When a difference occurs between the detected value of the temperature sensor (17) and the temperature set by the temperature setting device (18), the control device (C)
generates a drive pulse according to the control program read from the memory (U), and applies a voltage to the piezoelectric element (e) to reduce the inner diameter of the piezoelectric element (0), as shown in FIG. As a result, the plunger (12) is clamped, and the voltage applied to the piezoelectric element ([) is released to expand the inner diameter of the piezoelectric element (f), thereby releasing the clamp on the plunger (12).

Next, as shown in FIG. 10, when a voltage is applied to the piezoelectric elements (g) and (h) to extend them, the piezoelectric elements (g and h) move in the direction of the arrow, and along with this, the piezoelectric elements (g and h) move in the direction of the arrow. The plunger (12) clamped by e) also moves in the direction of the arrow.

Thereafter, as shown in FIG. 11, by releasing the applied voltage to the piezoelectric element (e) and expanding the inner diameter of the piezoelectric element (e), the clamp of the plunger (12) is removed by 51 pieces.
The plunger (12) is clamped by applying a voltage to the piezoelectric element (f) and reducing the inner diameter of the same piezoelectric element ff), and when the applied voltage to the piezoelectric element ((+) (h) is released, the piezoelectric The element +!11) (+1) contracts in the direction of the arrow, and the plunger (12) further moves in the direction of the arrow.

After that, by repeating the above operation, 1 runge (
12) can be moved in a linear manner with a stroke on the μm order or sub-μm order, and various devices and machines can be operated precisely.

In addition, in this embodiment, the plunger (12) has a diameter-reduced tip formed or connected to its tip, and the end surface area (pressure receiving area) of the tip is significantly larger than the cross-sectional area of the plunger (12). It is kept small.

Therefore, when used in a valve, etc., as described later, the pressure receiving area can be significantly reduced, so the thrust force applied to the plunger (12) is minimized, and the influence of the thrust force on the drive of the plunger (12) is minimized. This makes it possible to accurately drive the granger (12).

As mentioned above, the partition wall (10) of the valve body (7) has a plurality of diagonal through holes (13) (13) in different directions.
... is bored to communicate the hot water side flow rate adjustment valve (8) with the mixed hot water flow path (3), thereby actively stirring and mixing the hot water in the same flow path (3). This has the effect of eliminating unevenness in the temperature of the water discharged from the hot water mixing device (^) and stabilizing temperature control.

The invention can also be implemented in various ways as shown in FIGS. 12-16.

The embodiment shown in FIG. 12 is a piezoelectric actuator (
D), the hot water side flow rate adjustment valve (8f) and the water side flow rate of the hot water mixing device (F) that operate both the hot water side flow J1 adjustment valve (8f) and the water side flow rate 1tua valve (9 valves) inversely proportionally on one axis. Swirling guide vanes (13f) as swirling flow generating means (H) are provided on both sides of the regulating valve (9f).

FIG. 13 shows a hot water mixing device (13g) in which a swirling guide vane (13g) as a swirling flow generating means is provided at each inlet to the hot water side flow B1 regulating valve (8f) and the water side flow regulating valve (9f).
G).

In Fig. 14, a rotary drive means (Oh) such as a pulse motor (H1'1) and an interlocking tfltR (De) consisting of a meshing gear and a screw rod are used as the drive means of the hot water mixing device (]1). Figure 13 shows something similar to this.

In Fig. 15, the temperature and mixed flow rate of mixed hot water are adjusted by independently driving the hot water side flow m adjustment valve (8J) and the water side flow rate adjustment valve (1), and each valve (8j )
This hot water mixing device (J) is provided with swirl guide vanes (13j) (13j) at the outflow portion from (9j) to the mixed hot water flow path (3).

FIG. 16 shows the swirling flow generating means in the hot water mixing device shown in FIG.
9k) is a hot water mixing device installed upstream of the hot water mixing device.

In these embodiments, the swirling flow generating means is provided in both the hot water side flow path and the water side flow path, but it may be provided in only one of them.

When provided on both sides, it is of course preferable to determine the swirling direction so that the swirling flows on both sides easily collide and stir.

In addition, in the piezoelectric actuator, each piezoelectric element (e) is )(
g) The relationship between the voltage application to (h) and the expansion and contraction of the piezoelectric element is reversed to that in this example, or the clamping force of the piezoelectric element for clamping is not completely released, and the clamping of the two clamp parts is It works even if the plunger is made to slide based on the difference in the magnitude of the force.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a hot water mixing device according to the present invention. FIG. 2 and FIG. 3 are explanatory views of the valve body. 4 to 7 are side views of the piezoelectric element. FIG. 8 is a block diagram showing the configuration of the control device. FIGS. 9 to 11 are explanatory views of the operation of the minute distance stepless drive type actuator. Figures 12 to 16 show embodiments of the pond of the hot water mixing device according to the present invention. (H): Swirl flow generating means (1): Water side flow path (2): Hot water side flow path (3): Mixed hot water flow path (8): Hot water side flow rate adjustment valve (9): Water side flow rate adjustment valve flo): Partition wall (13): Through hole

Claims (1)

[Claims] 1) A water surface flow rate adjustment valve (9) and a hot water side flow rate adjustment valve (8) are provided in the water side flow path (1) and the hot water side flow path (2), respectively, to adjust the mixing ratio of hot water and hot water. In a hot water mixing device (A) in which the flow rate regulating valves (8) and (9) are made variable, and the downstream side of each flow rate regulating valve (8) and (9) is communicated with the mixing hot water channel (3), the water side channel (1) or the water side flow regulating valve (9) or hot water side flow path (2) or hot water side flow rate adjustment valve (
A hot water mixing device characterized in that at least one of item 8) is provided with swirling flow generating means (M). 2) The swirling flow generating means (M) includes the flow rate regulating valve (8).
) (9) and the mixed hot water flow path (3), a partition wall (10) is provided, and a plurality of through holes (13) (13) are provided in the partition wall (10) in diagonal directions in different directions. By drilling...
A patent claim characterized in that the mixed hot water flow path (3) is configured to communicate with the downstream side of the flow rate regulating valves (8), (9) through the through holes (13), (13), and so on. The hot water mixing device according to item 1.