JP2506662B2 - Hot water mixing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing apparatus for supplying hot water by mixing hot water and water to obtain an appropriate temperature.

2. Description of the Related Art A conventional hot and cold water mixing device of this type has a device as shown in FIG. (For example, Japanese Patent Laid-Open No. 57-127171) FIGS. 3a and 3b show a mechanical thermostat automatic mixing stopper. The hot water pipe 1 and the water pipe 2 have a hot water side connecting cylinder 3 and a water side, respectively. The hot water side connection port 5 and the water side connection port 6 are connected via the connection tube 4. On the valve frame 7, a setting knob 8 for setting the temperature of the mixed hot water, a setting knob 9 for quantitative water stoppage that automatically stops hot water after supplying a predetermined amount of hot water to the bathtub, the shower 10 side or the currant 11 side A setting knob 12 etc. for switching the hot water supply destination and setting the water stop is provided. In this conventional hot and cold water mixing device, the thermostat part for adjusting the temperature of the mixed hot water has a complicated structure as shown in FIG.
Wax Thermo Element 13 that expands and contracts according to the temperature of the mixed hot water
Also, due to the structure of the mixing section consisting of the mixing valve body 14, for a site where the hot water and water pipes 1 and 2 were reversed, another model with the internal structure completely reversed was prepared.

Problems to be Solved by the Invention However, the above configuration has the following problems.

(1) It is necessary to prepare another model whose internal structure is completely reversed in case the hot water and water piping are reversed, and it takes time and effort to raise another model and the price is expensive. It was.

(2) It was not possible to flexibly change the hot water and water pipe connection relationship according to the situation at the site, and it was difficult to do the piping work.

The present invention solves such a conventional problem, and does not require a joint for changing the pipe connection or reversing the special connection relation, and also, if necessary, on-site water and water are free. It is an object of the present invention to provide a hot and cold water mixing device which can also select the pipe connection relation of.

Means for Solving the Problems To solve the above problems, a hot and cold water mixing apparatus of the present invention includes a hot and cold water mixing valve for mixing hot water and water supplied through a first connection port and a second connection port. An electric drive means for driving the mixing valve, a mixing hot water temperature setting device for setting the mixed hot water temperature,
Hot water pipes to the first connection port and the second connection port, switching means for setting to switch the control direction of the electric drive means according to the connection state of the water pipes, and electrical according to the setting of the mixed hot water temperature setting device. The controller is configured to control the drive means and control for switching the control direction of the electric drive means according to the setting of the switching means.

Effect of the Invention With the above-described structure, the present invention changes the internal structure of the hot and cold water mixing device by selecting the control direction of the electric drive means by the controller at the factory or on-site, regardless of the connection relationship between the hot water and the water pipe at the site. Without using a joint that changes the pipe connection or reverses the special connection relationship, the same machine can be used.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, the hot water pipe 15 and the water pipe 16 are connected to a connection port 18 and a connection port 19 provided in the valve frame body 17. Hot water and water supplied through these connection ports 18 and 19 are mixed by a hot / water mixing valve 21 via a pressure balance valve 20 for balancing the pressures of the two. This hot and cold water mixing valve 21 has a valve body 2
2, a valve body 23, a shaft 24, a biasing spring 25, a biasing spring 26, etc., and the shaft 24 is moved to the left and right via a reduction gear 28 and a linear motion conversion mechanism 29 by a mixing valve motor 27 provided outside. Moved,
The mixing ratio is adjusted. The temperature of the mixed hot water mixed is detected by the thermistor 30. The flow rate of the mixed hot water is detected by the flow rate sensor 31. Then, the mixed hot water is supplied to the hot water supply target from the faucet 33 through the mixed hot water path 32. The mixed water is
It is configured to be supplied via a flow rate control valve 34 that regulates the flow rate and shuts off water. The flow rate control valve 34 is driven by a flow rate control motor valve 35. In the vicinity of the faucet 33, it is instructed to start and stop the hot water supply, the mixed hot water temperature and the mixed flow rate,
Further, a setter 36 for setting the integrated value of the mixed flow rate and displaying these current values is provided. The signals from the setter 36, the thermistor 30, and the flow rate sensor 31 are transmitted to the controller 37, and the controller 37 controls the display of the mixing valve motor 27, the flow rate control valve motor 35, and the setter 36. The controller 37 is provided with a changeover switch 38 that switches the control direction of the mixing valve motor 27 according to the connection relationship between the hot water pipe 15 and the water pipe 16 and the connection ports 18 and 19. FIG. 2 shows a control block diagram of this embodiment. The mixed hot water temperature set by the setting device 36 is compared with the signal of the thermistor 30 by the controller 37, and the changeover switch 38 selects the control direction. By changing over the changeover switch 38,
It is selected whether the deviation of the mixed hot water temperature is directly transmitted to the adjusting unit 40 or the sign thereof is inverted and transmitted. The inversion of the sign is performed by, for example, an inverter. The adjusting unit 40 amplifies and adjusts the signal to control the mixing valve motor 27. The mixing valve motor 27 drives the hot and cold water mixing valve 21 to adjust the mixing ratio. In addition to this, the controller 37 also includes a portion 41 for performing flow rate control, display control, etc., but detailed description thereof will be omitted.

Next, the operation of this embodiment will be described. At the time of pipe construction, the changeover switch 38 selects forward connection or reverse connection depending on how the hot water pipe 15 and the water pipe 16 are connected to the connection port 18 and the connection port 19. In the example of FIG. 1, the hot water pipe 15 is arranged on the left side and connected to the connection port 18, and the water pipe 16 is arranged on the right side and connected to the connection port 19. Is set to the positive side as shown in FIG.
When this connection relationship is reversed, that is, when the water pipe 16 is connected to the connection port 18 and the hot water pipe 15 is connected to the connection port 19, the changeover switch 38 is set to the opposite side.

In use, when a desired mixed hot water temperature, a mixed flow rate, and an integrated value of the mixed flow rate are set by the setting device 36 and a start of hot water supply is instructed, the flow rate control valve 34 is first opened, and hot water and water start flowing. .
The temperature at which the hot water and the water are mixed is detected by the thermistor 30 and set by the setting device 36, and the mixing ratio is adjusted so that the mixed hot water temperature is obtained. That is, when the temperature of the mixed hot water detected by the thermistor 30 is lower than the set value, for example, the shaft 24 of the mixing valve 21 .
Is moved to the left side, the valve body 22 widens the passage of hot water, and the valve body 23 narrows the passage of water. In this way, the amount of hot water is increased and the amount of water is reduced to face the mixing valve 21 at a position where an appropriate temperature is obtained.
When the hot water pipe 15 and the water pipe 16 are connected in reverse, the operation for adjusting the mixed hot water temperature needs to be reversed, so the control direction is reversed by the changeover switch 38.
When the water pressure or the hot water pressure fluctuates during use, the pressure balance valve 20 absorbs the fluctuation and maintains the pressure balance of hot water and water to suppress the fluctuation of the mixed hot water temperature. Further, the mixed hot water temperature detected by the thermistor 30 and the flow rate of the mixed hot water detected by the flow rate sensor 31 are displayed on the setting device 36 via the controller 37. When stopping the hot water supply, the flow rate control valve 34 is closed to stop the hot water supply when the setting device 36 instructs the stop. Since these operations can be performed electrically, the operations can be performed lightly and the setting device 36 can be controlled even in a remote place.

As the usage of the changeover switch 38, for example, a solar water heater is connected to the water side, a normal water heater is connected to the hot water side, and the solar hot water and hot water are mixed and supplied during normal use,
When a sufficiently high temperature can be obtained with the solar water heater, it is also possible to stop the operation of the water heater and switch the changeover switch 38 to the opposite side to supply the solar hot water and the water supplied from the hot water side in a mixed manner. .

As an effect of this embodiment, the controller 37 is configured such that switching can be performed by the changeover switch 38 at the site according to the connection status of the hot water pipe 15 and the water pipe 16 to the connection port 18 and the connection port 19. Therefore, it is possible to change the control direction flexibly according to the situation of the site and the above-mentioned actual use condition, and the usability can be improved.Since the changeover of the control direction is performed by the changeover switch 38, the pipe connection state is determined. It is possible to simply and inexpensively construct without requiring any detecting means.

In this embodiment, the system in which the mixed hot water temperature is detected by the thermistor 30 and fed back to be controlled is taken as an example, but the feed forward control is performed to measure and control the hot water temperature and water temperature, and the hot water amount and water amount in advance. Of course, the idea of the present invention can be applied to the above.

Further, the type of the mixing valve 21 is not limited to this embodiment, but the valve body 22
It is also possible to use a mixing valve or the like of a type in which the valve body 23 is independently operated to control the flow rate and stop the water, and each is driven by an independent motor.

Further, as means for reversing the control direction, in addition to this embodiment, a method of reversing the signal output from the adjusting section 40 or a setting device
There are many methods, such as the method of inverting the signals of 36 and the thermistor 30 in advance. In addition, the changeover switch 38 may be set in the factory in advance and shipped when the on-site operation is inconvenient.

Effects of the Invention As described above, the hot water mixing device of the present invention has the following effects.

(1) Even when the hot water pipe and the water pipe are opposite to each other, without changing the connection of the hot water and the water to the mixing valve, and without preparing a special replacement joint,
In addition, with a special replacement joint, it does not spoil the aesthetics,
Only by switching the operation of the mixing valve by the switching means for setting the control direction of the electric drive means, it is possible to respond immediately.

(2) The relationship between the hot water and the water can be switched by operating the switching means even after the pipe connection is completed. , You can easily switch and respond.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a hot and cold water mixing apparatus according to an embodiment of the present invention, FIG. 2 is a control block diagram of the same embodiment, and FIG.
FIG. 4 is an external view of a conventional hot and cold water mixing apparatus, and FIG. 4 is an enlarged cross-sectional view of a main part of the apparatus. 15 …… Hot water piping, 16 …… Water piping, 18 …… Connection port, 19 …… Connection port, 21 …… Hot and cold water mixing valve, 27 …… Mixing valve motor (electric drive means), 36 …… Setting device ( Mixed hot water temperature setting device), 37 ……
Controller, 38 ... Changeover switch.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumikazu Shiba 1006 Kadoma, Kadoma City, Matsushita Electric Industrial Co., Ltd. (56) References JP-A-60-201172 (JP, A) JP, U)

Claims (1)

(57) [Claims] 1. A first connection port for connecting a hot water pipe or a water pipe, a second connection port for connecting a water pipe or a hot water pipe, and a supply through the first connection port and the second connection port. Hot water mixing valve for mixing hot water and water, an electric drive means for driving the hot water mixing valve, a mixed hot water temperature setting device for setting the mixed hot water temperature, the first connection port and the second connection Hot water piping to the mouth, switching means for setting to switch the control direction of the electric driving means according to the connection state of the water piping, and controlling the electric driving means according to the setting of the mixed hot water temperature setting device, A hot and cold water mixing apparatus comprising: a controller that controls to switch the control direction of the electric drive means according to the setting of the switching means.