JP3844907B2 - Hot water mixing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot and cold water mixing device used in a hot water supply device in which hot water and water are mixed to obtain mixed hot water having a set temperature.
[0002]
[Prior art]
Conventionally, in this type, as disclosed in, for example, Japanese Examined Patent Publication No. 62-48783, a mixing portion of hot water and water having a mixing valve body, a temperature sensor for detecting the mixed hot water temperature, In the meantime, by providing an orifice, the mixing of hot water and water is promoted to try to detect the mixed hot water temperature to a certain extent.
[0003]
[Problems to be solved by the invention]
By the way, in this conventional one, since the orifice is only provided at the outlet of the mixing section, the mixed hot water and water are once converged and then diffused to the temperature sensor, but the hot water and water are simply focused instantaneously. The problem is that hot water and water are not separated and mixed when diffused, good mixing is not performed, accurate hot water temperature cannot be detected, and hot water at the set temperature cannot be obtained. It is what has.
[0004]
[Means for solving problems]
This invention pays attention to this point and solves the above-mentioned drawbacks. In particular, the configuration is such that hot water from the hot water channel and water from the water channel are mixed by a mixing valve body driven by a driving device, and set temperature is set. In the case of supplying the mixed hot water, the mixing section for storing the mixing valve body, the mixing flow path through which the mixed hot water from the mixing section flows, and the temperature of the mixed hot water are detected in the middle of the mixing flow path. A temperature sensor for controlling the driving device, and a mixing channel between the mixing unit and the temperature sensor is formed by overlapping ends of two linear channels facing in the same direction and communicating with each other at the overlapping part Further, the inlet side of this crank passage is a narrower passage from the inlet to the first collision part than the other .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
If the mixing valve body 6 is driven in advance by the driving device 7 so as to obtain the mixed hot water at the set temperature, and the hot water flow path 3 and the water flow path 4 are opened at the set mixing ratio of hot water and water, the supplied water is supplied. Hot water and water are combined in the mixing unit 1 and circulate in the mixing channel 10. A crank channel 13 is formed between the mixing unit 1 and the mixing channel 10 provided with the temperature sensor 11. Has been.
[0006]
The mixed hot water flowing into the crank passage 13 first advances straight through the crank passage 13 on the inlet side, collides with the collision portion 13a on the inner wall of the passage, and generates turbulence, where the first mixing is promoted. Next, the 90 ° flow path is changed and flows, and this time it collides with the collision portion 13b of the inner wall of the opposite flow path to cause turbulent flow, where mixing is promoted for the second time, and 90 ° flow is again performed. The passage is changed and the temperature of the mixed hot water is detected through the temperature sensor 11, and the mixing valve body 6 is driven with a deviation from the set temperature to finely adjust the opening degree of the hot water flow path 3 and the water flow path 4. A hot water mixture having a set temperature is obtained.
[0007]
Accordingly, the mixed hot water is circulated through the crank passage 13 to cause turbulent flow several times in the middle, thereby promoting mixing. Therefore, the temperature sensor 11 can detect an accurate mixed hot water temperature and always A hot water mixture having a set temperature can be obtained.
[0008]
Furthermore, by making the inlet side of the crank flow path 13 a reduction flow path 14, the mixed hot water first collides while maintaining a converged state while slightly increasing the flow velocity, and the mixing accelerating effect is achieved by vigorous turbulent flow. Improvement is to be measured.
[0009]
【Example】
Next, a hot and cold water mixing apparatus according to the present invention will be described with reference to an embodiment shown in the drawings.
Reference numeral 1 denotes a hot water passage 3 through which a hot water having a constant temperature is circulated, in communication with a heat source device 2 such as a hot water supply device, and a water passage through which water is communicated with a water supply source having a smaller diameter than the hot water passage 3. 4 is a mixing portion that is in communication with the position 4 opposite at 180 °, and a mixing valve body 6 having a hollow inside and an open port 5 at least half of the peripheral wall is provided inside.
[0010]
Reference numeral 7 denotes a drive device composed of a stepping motor that drives the mixing valve body 6 via the drive shaft 8, and is fixed above the mixing portion 1 with screws 9.
[0011]
10 is a mixing passage through which the hot water and mixed water of water are circulated at the bottom of the mixing portion 1 and communicated with the hollow portion of the mixing valve body 6, and a temperature sensor 11 comprising a thermistor for detecting the temperature of the mixed hot water is provided in the middle. It communicates with a faucet 12 for hot water supply provided at an appropriate place.
[0012]
Reference numeral 13 denotes a crank passage formed in the mixing passage 10 between the mixing section 1 and the temperature sensor 11. Two crank passages are connected at the overlapping portion, and a portion where the 90 ° passage is changed is 2. Provided with two collision parts 13a, 13b with the inner wall of the mixing channel 10, and the inlet side of the crank channel 13 is 70% to 80% smaller than the outlet side as a reduced channel 14 whose inner volume is narrow, Mixing of hot water and water until reaching the temperature sensor 11 is promoted so that the detected temperature becomes the correct temperature of the mixed hot water.
[0013]
15 is a control means composed of a microcomputer or the like for controlling the drive of the drive device 7, and a set temperature of a setter 16 comprising a remote controller provided near the faucet 12 and capable of setting the supplied hot water temperature to a desired temperature; The drive of the driving device 7 is controlled from the deviation value from the actual mixed hot water temperature detected by the temperature sensor 11 to adjust the mixing ratio of hot water and water, and the initial mixing ratio of hot water and water with respect to the preset temperature is set. And the drive device 7 is driven to the opening degree of the hot water flow path 3 and the water flow path 4 so as to be the initial value at the start of hot water supply.
[0014]
Reference numeral 17 denotes a seal member made of packing or the like for sealing the fixed portion of the drive device 7 and the drive shaft 8.
[0015]
The entire mixing apparatus is formed of a casting, and the hot water flow path 3, the water flow path 4 and the mixing flow path 10 are respectively connected to appropriate connecting pipes to constitute a hot water supply apparatus. The control means 15 may be incorporated in the heat source device 2.
[0016]
Next, the operation of the embodiment of the present invention will be described.
If the faucet 12 is now opened and hot water supply is started, this is detected by the control means 15 as flowing water by a flow sensor (not shown), and the drive device 7 is operated with an initial value pulse corresponding to the temperature set by the setting device 16. It drives, moves the mixing valve body 6 to the position where the mixing ratio of hot water and water becomes a predetermined value, and adjusts the opening degree of the hot water channel 3 and the water channel 4 simultaneously.
[0017]
Thus, hot water is supplied from the hot water channel 3 at a constant temperature, 80 ° C. heated by the heat source unit 2, and cold water is supplied from the water flow channel 4 and mixed in the mixing unit 1. The temperature sensor 11 detects the actual mixed hot water temperature, and drives the drive device 7 again via the control means 15 with a deviation value from the set temperature to finally finely adjust the position of the mixing valve body 6. Thereafter, a mixed hot water having a set temperature can be obtained.
[0018]
At this time, the mixed hot water flowing through the mixing flow path 10 is the crank flow path 13 between the mixing section 1 and the temperature sensor 11, so that the mixed hot water is the temperature sensor 11 as shown by the arrows in FIG. The 90 ° flow path is changed twice until the temperature sensor 11 is reached, and each time it collides with the collision parts 13a and 13b, the turbulent flow is surely caused. It can be detected, and a good hot water supply with little temperature fluctuation can be obtained.
[0019]
Moreover, it has a simple structure of forming the crank flow path 13, and without any additional parts, mixing is promoted while the entire mixing apparatus is compact, and it is easy to use.
[0020]
Further, since the inlet side of the crank passage 13 is a reduced passage 14 that is narrower than the outlet side, the mixed water that has flowed in here is focused over a relatively long range, and the first collision and the passage change are performed. Therefore, the mixing can be promoted more satisfactorily.
[0021]
【The invention's effect】
As described above, according to the present invention, although the structure is compact and simple, mixing of hot water and water can be favorably promoted to detect an accurate mixed hot water temperature. Hot water can be obtained smoothly. Furthermore, by making the inlet side of the crank flow path a reduced flow path, the mixed hot water first collides while maintaining a converged state while slightly increasing the flow velocity, and the mixing promotion effect is improved by vigorous turbulent flow. It is to be measured .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a hot and cold water mixing apparatus according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mixing part 3 Hot water flow path 4 Water flow path 6 Mixing valve body 7 Drive apparatus 10 Mixing flow path 11 Temperature sensor 13 Crank flow path 14 Reduction flow path

Claims (1)

A mixing unit for storing hot water from a hot water flow channel and water from a water flow channel with a mixing valve body driven by a driving device and supplying mixed hot water at a set temperature. And a mixing flow path through which the mixed hot water from the mixing section flows, and a temperature sensor for detecting the temperature of the mixed hot water in the middle of the mixing flow path and controlling the drive device, and between the mixing section and the temperature sensor The mixing flow path is a crank flow path formed by overlapping the ends of two straight flow paths facing in the same direction and communicating with each other at the overlapping portion, and the inlet side of this crank flow path is the first collision from the inlet. A hot and cold water mixing device characterized in that a narrower flow path is formed between the part and the other part .

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