JPH02149328A - Mixing device - Google Patents

Abstract

PURPOSE:To promote the stability of temperatures of hot water by regulating a first control valve and a second control valve by means of a control unit to change pressures of a first control chamber and a second control chamber, moving a mixing valve to change the mixing ratio of two fluid, thereby controlling the mixing ratio. CONSTITUTION:A mixing valve 9 is made up of a first valve 6 provided in a first channel 2, a first control part 10, a second valve 8 provided in a second channel 3, and a second control part 11, while a first control chamber 19 and a second control chamber 20 are formed by the first control part 10, the second control part 11, and a mixing body 1. Further, a mixing channel 4 for the first valve 6 and second valve 8 is provided, while a channel 12 is provided which is opened to the mixing channel 4 from each of the first control chamber 19 and the second control chamber 20. A first control valve 13 and a second control valve 14 are provided in the channel 12, which are operated by a control unit 18. As a result, a mixing device, in which small changes in mixing ratio relative to changes in supply pressure can be achieved, can be obtained with simple construction.

Description

[Detailed description of the invention] Industrial applications The present invention relates to adjusting the mixing ratio of a mixing device.

BACKGROUND ART In a mixing device that mixes two fluids and controls the ratio to be constant, a balancer is used as shown in Figure 2 to ensure a transiently stable mixing ratio even in the face of sudden changes in fluid supply pressure. A device is known in which the pressure of the first fluid and the second fluid are equalized by providing the pressure of the first fluid and the second fluid.

That is, the different pressures in the first fluid passage d and the second fluid passage e are equalized by the first fluid side pressure receiving body and the second fluid side pressure receiving body C of the balancer a, and the first fluid passage on the downstream side of the balancer a is made equal pressure. d' and the second fluid passage e', a mixing valve f is adjusted by an operating body g.

Problems to be Solved by the Invention However, in the above configuration, the pressure balancer and the mixing valve must be provided separately, making the configuration complicated. The present invention provides a mixing device with a simple configuration and good hot water temperature stability.

Means for Solving the Problems In order to solve the above problems, the mixing device of the present invention includes a first valve and a first control section provided in the first passage, a second valve provided in the second passage, and a second valve provided in the second passage. a mixing valve consisting of a control section; a first control chamber and a second control chamber formed by the first control section, second control section and the mixing body; a mixing passage between the first valve and the second valve; A passageway opening to a twisted mixing passage in each of the first control room and the second control room;
a first control valve and a second control valve respectively provided in the passage;
The control valve includes an operating body for operating the first control valve or the second control valve.

Operation The mixing device of the present invention has the above-described configuration, and the operating body adjusts the first control valve and the second control valve to vary the pressure in the first control chamber and the second control chamber, and moves the mixing valve. The mixing ratio is adjusted by changing the mixing ratio with the fluid.

EXAMPLES Below, a mixing apparatus which is an example of the present invention will be explained based on the accompanying drawings. In FIG. 1, 1 is a mixing main body, which has a first passage 2, a second passage 3, and a mixing passage 4. The first passage 2 is provided with a valve seat 5 and a second valve 6, and the second passage 3 is provided with a mixing valve 9 having a valve seat 7 and a second valve 8. The mixing valve 9 has a hollow cylindrical shape and has a first valve 6 and a first control section 10 on both sides of the first passage 2.
A second valve 8 and a second control section 11 are provided on both sides of the second passage 3.

The pressure in the first passage 2 is applied to both the first valve 6 and the first control section 10 and is approximately balanced. The mixing valve 9 has a passage 12 in a hollow cylinder, and an opening 12a in the center of the passage 12.
12b is provided, and a first control valve 13 and a second control valve 14 are arranged at both ends thereof, and the first control valve 13 and the second control valve are connected by a connecting body 15. The first control valve 13 and the second control valve 14 are attached to a first casing 16 and a second casing 17 forming part of the mixing body 1 . The first control valve 13 having a screw 13a is rotated by the operating body 18, engages with the screw 16a of the first casing 16, and moves linearly, and this displacement is transmitted to the second control valve 14 by the transmission body 15.

The first casing 16 and the second casing 17 form a first control chamber 19 and a second control chamber 20 with the first control section 10 and the second control section 11, respectively. First casing 16 and first control section 10 or second casing 17 and second control section 11
There is a slight gap between the sliding parts, and through this gap, the fluid in the first passage and the second passage flows into the first control chamber 19 and the second control chamber 20, respectively, and the fluid flows into the first control chamber 19 and the second control chamber 20, respectively. 3 and the second control valve 14, and flows out into the mixing path 4 through the openings 12a and I2b. 21.2
2 and 23 are springs, the spring 21 is for the second valve 6 and the first control section 10, and the spring 22 is for the second valve 8.
and the second control section 11 are positioned on the mixing valve 9, and the spring 23 presses the second control valve 14 and the transmission body 15.

Next, the operation will be explained. The mixing ratio can be adjusted by operating the driver 18. - As an example, a case where the flow rate in the first passage 2 is low and the flow rate in the second passage 3 is high with respect to the set value of the mixing ratio will be described.

At this time, the operating body 18 is rotated to move the first control valve 13 upward. At this time, the second control valve is also moved upward by the spring 23, the gap between the first control valve 13 and the passage 12 becomes larger, the pressure in the first control chamber 19 decreases, and the second control valve 14 and the passage 12 becomes smaller, and the pressure in the second control chamber 20 increases. As a result, the mixing valve 9 moves upward, and the second valve 6 opens to increase the flow rate in the first passage 2, and at the same time, the second valve 7 closes and decreases the flow rate in the second passage 3 to adjust the mixing ratio. Adjust. When the flow rate in the first passage 2 is high and the flow rate in the second passage 3 is low, the flow rate in the first passage 2 decreases and the flow rate in the second passage 3 increases by the above-mentioned reverse operation, and the mixing ratio is adjusted. .

Next, a case where the pressure in the first passage 2 or the second passage 3 changes will be described. If the mixing valve 9 is stationary due to a decrease in the supply pressure in the first passage 2, the flow rate in the first passage 2 will decrease and the mixing ratio will change, but in this device, the decrease in the pressure in the first passage 2 causes the The pressure in the control chamber 19 drops and the mixing valve 9
moves upward, opening the first valve 6 more and closing the second valve 7 more. In other words, since the flow rate in the first passage 2 is prevented from decreasing and the flow rate in the second passage 3 is increased, fluctuations in the mixing ratio are small. As the mixing valve 9 moves upward, the gap between the first control valve 13 and the passage 12 becomes smaller, and the pressure in the first control chamber 19 tends to increase, and conversely, the pressure in the second control chamber 20 tends to increase. tends to become lower, so upward movement of the mixing valve 9 is suppressed, and as a result, the position of the mixing valve 9 is kept stable. When the pressure in the first passage 2 increases, the pressure in the first control chamber 19 increases and the second valve 6 is closed to prevent the flow rate in the first passage 2 from increasing. Further, in response to a change in the pressure in the second passage 3, the pressure in the second control chamber 20 increases or decreases to move the mixing valve 9, so that changes in the flow rate in the second passage 3 can be prevented.

Effects of the Invention As described above, the mixing device of the present invention includes a mixing valve including a first valve and a first control section provided in a first passage, and a second valve and a second control section provided in a second passage. , a first control chamber and a second control chamber formed by the first control section, the second control section, and the mixing body; a mixing path between the first valve and the second valve; and a first control chamber and the second control chamber. A passage opening from each of the control chambers to the mixing passage, a first control valve and a second control valve provided in each of the passages, and an operating body for operating the first control valve or the second control valve. , has the following effect.

(1) A mixing device whose mixing ratio changes little with respect to changes in supply pressure can be realized with a simple configuration.

(2) Since a control valve smaller than the mixing valve is operated, the operating force is small and the operation is easy.

(3) There is only one valve for each fluid to pass through (low pressure loss).

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a mixing device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional mixing device. 1...Mixing body, 2...First passage, 3
...No. 1 passage, 4...Mixing passage, 6...
. . .-th valve, 8 . . . th valve, 9 . . . mixing valve, 10 . ...Aisle, 12a, 12b...
・Opening part, 13... No. 1 valve, 14...
Second valve, 18... Operating body, 19... First control room, 20... Second control room.

Claims (1)

[Claims] A mixing valve consisting of a first valve and a first control section provided in a first passage, and a second valve and a second control section provided in a second passage;
a first control chamber and a second control chamber formed by the first control section, the second control section, and a mixing body; a mixing path between the first valve and the second valve; and the first control chamber. and a passage opening into the mixing passage from each of the second control chambers, a first control valve and a second control valve provided in the passages, and operating the first control valve or the second control valve. A mixing device equipped with an operating body.