JPH079302B2 - 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 adjusting a mixing ratio of hot water and water to obtain an appropriate temperature.

2. Description of the Related Art A conventional hot and cold water mixing apparatus of this type includes, for example, Japanese Patent Laid-Open No. 56-146.
Some of them were found in Japanese Patent Publication No. 66, but as a known example closer to the present application, a commercial product such as that shown in FIGS. 2 and 3 was used. (For example, Toto Kikai Co., Ltd. Sanitary Ware Equipment General Catalog '83 to '84 P181, P186) Fig. 2 is an external view of the thermostat shower bath metal fitting with fixed water stop. Set,
The faucet 3 side, the shower 4 side or the hot water supply destination is selected by operating the switching knob 2, and when the fixed quantity is reached, the fixed quantity water stop knob 5 is operated to set the quantity in order to stop the supply of the mixed hot water.
The flow channel configuration of this device is shown in FIG. The mixing ratio of the hot water and the water supplied from the hot water flow path 6 and the water flow path 7 is adjusted by the mixing valve 8 in which the mixed hot water temperature is set by the hot water temperature setting knob 1, and the switching and flow rate is performed via the hot water flow path 9. Up to control valve 10. The switching / flow rate control valve 10 selects either the faucet 3 or the shower 4 by the switching knob 2 and adjusts the flow rate. A bypass 11 is provided branching from the switching valve 10 in order to automatically stop the supply when the mixed hot water is accumulated and reaches a certain amount. In the middle of the bypass 11, a flow rate detection integration mechanism 12 that detects and integrates the flow rate, and a flow rate detection integration mechanism 12
There is provided a water shutoff valve 13 operated by.

The operation of the thermostat shower bath metal fitting with fixed water stop will be described. It is assumed that the hot water temperature setting knob 1 is operated to set a desired mixed hot water temperature, and the switching / flow rate control valve 10 is first switched to the faucet 3 side. The hot water and the water sent from the hot water flow path 6 and the water flow path 7 are mixed by the mixing valve 8, become an appropriate temperature, and are supplied from the faucet 3 via the switching / flow rate control valve 10. When the switching / flow rate control valve 10 is switched to the shower 4 side, the supply of the mixed hot water from the faucet 3 is stopped, and the hot water is supplied only from the shower 4. In the case of performing the fixed amount of water stop, the switching / flow control valve 10 is switched to the bypass 11 path, and when the integrated flow amount value is set by the fixed water stop knob 5, the water stop valve 13 is opened and the hot water supply is started. bypass
When the mixed hot water flows through 11, the impeller inside the flow rate detection integration mechanism 12 rotates, and the flow rate values are integrated. At this time, the mixed hot water is joined from the bypass 11 to the switching / flow control valve 10 and thereafter, and is supplied from the faucet 3 to, for example, the bathtub. At the stage when the quantitative value is reached, the water shutoff valve 13
Is closed and hot water supply is automatically stopped.

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

(1) Switching and flow control valve 10,
Since hot water is supplied through the flow rate detection integration mechanism 12 and the water shutoff valve 13, there is a problem that the pressure loss becomes large and only a small amount of the mixed hot water can be supplied, and it takes time to fill the bathtub.

(2) A dedicated water shutoff valve 13 is required to perform quantitative water shutoff, which makes the structure complicated and expensive.

(3) The operation at the time of fixed water stop is the operation of the hot water temperature setting knob 1 for setting the mixed hot water temperature, the operation of the switching knob 2 for switching the flow path to the bypass 11 side, and the fixed water stoppage for setting the integrated flow rate value. There are three types of operation, Knob 5, and it was necessary to redo the operation each time it was used, and the usability was poor.

The present invention solves such a conventional problem, and an object thereof is to provide a hot and cold water mixing apparatus having a low pressure loss, a simple structure, and excellent operability.

Means for Solving Problems The hot and cold water mixing apparatus of the present invention in order to solve the above problems,
A mixing valve for adjusting the mixing ratio of hot water and water supplied through the hot water flow path and the water flow path, a mixing valve drive device for driving this mixing valve, and a mixed hot water temperature provided in the mixed hot water flow path through which the mixed hot water passes. A detector, a first flow path branched from the mixed hot water flow path, a second flow path, a first flow path, and a switching / flow rate control valve that switches the second flow path and stops water. A control valve drive device that drives the switching and flow control valve, a set hot water temperature provided at the hot water supply destination of the hot water mixture and a setting device for instructing start / stop of hot water supply, and a hot water supply destination instructed by each of the setting devices. Controls the control valve drive device to switch the flow path to supply hot water, and also controls the mixing valve drive device by comparing the signals from the mixed hot water temperature set by the setter on the instructed side and the mixed hot water temperature detector. It is composed of vessels.

Effect The present invention has the above-described configuration, adjusts the mixing ratio by the mixing valve so that the mixed hot water temperature set by the setting device is obtained, and switches the flow path according to the instruction of each setting device and supplies hot water with the flow control valve. Switching the destinations and switching and stopping the water with a single valve to simplify the configuration and reduce pressure loss, and to supply hot water at the mixed hot water temperature set to the hot water destination according to the settings simply by operating each setting device. Is performed to improve operability.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, the hot water and the water supplied through the hot water flow path 14 and the water flow path 15 first enter a pressure regulating valve 17 that equalizes the pressure of the hot water and the water in the valve frame body 16. The mixing ratio of the hot water and water equalized by the pressure regulating valve 17 is adjusted by the mixing valve 18. The mixing valve 18 is driven by a mixing valve drive device 22 provided outside the hot water valve body 19 and the water valve body 20 via a shaft 21. The drive device 22 includes a motor 23,
It is composed of a gabox 24 and a linear motion conversion mechanism 25, and is controlled by a controller 28 as will be described later in detail based on a signal from the mixed hot water temperature detector 27 provided in the mixed hot water flow path 26. A shower flow path 29 and a faucet flow path 30 are branched from the mixed hot water temperature flow path 26, and a switching / flow control valve 31 for switching the hot water supply destination, stopping the hot water supply, and adjusting the flow rate is provided at the branch portion. ing.

The switching and flow control valve 31 includes a shower side valve body 32 and a faucet side valve body.
Both ends of the valve 33 are regulated by stoppers 34 and 35, and are biased by a spring 36 in the direction of separation, and both valve bodies are penetrated by a shaft 37 so as to have a degree of freedom in the axial direction. When the shaft 37 is driven left and right in the figure by the control valve drive device 38 provided outside, hot water is supplied to the faucet 39 as the state is pushed from the left side to the right side → Both the faucet 39 and the shower 40 are stopped → It can be switched in the order of hot water supply to the shower 40. For this reason, switching of the flow paths is performed only by the switching / flow rate control valve 31, and a separate water shutoff valve is not required even when performing quantitative water shutoff, so that pressure loss can be reduced and the configuration can be simplified. A setting device 41 is provided near the faucet 39, and the setting device 41 includes a mixed hot water temperature setting unit 42, a hot water supply switch unit 43,
It has a flow rate setting unit 44 and a display unit 45. Shower 40 again
A setting device 46 is installed near the
It has a hot water supply switch section 48, and a display section 49. 50
Is a flow rate detector, and is provided in the faucet flow path 30 downstream of the switching / flow rate control valve 31 in order to simplify the overall configuration and prevent malfunction. The signal from the flow rate detector 50, the signal from the mixed hot water temperature detector 27, and the signals from the setters 41 and 46 are taken into the controller 28, and the control signals are sent to the mixing valve drive device 22 and the control valve drive device 38. Reportedly.

Next, the operation of this embodiment will be described.

When the hot water supply switch section 48 of the setting device 46 of the shower 40 is turned on and the desired hot water temperature is set by the mixed hot water temperature setting unit 48, the control valve drive device 38 is first driven via the controller 28, and the shower side valve body 32 opens the flow path and the flow of hot water and water is started.
The pressure of the hot water and water that have entered the valve frame body 16 having the hot water flow path 14 and the water flow path 15 is first equalized by the pressure regulating valve 17, and then the mixing valve 18
The mixing ratio is adjusted with. The temperature of the mixed hot water is detected by the mixed hot water temperature detector 27, and is compared with the set value of the mixed hot water temperature setting unit 47 by the controller 28, and the controller 28 works by the mixing ratio to eliminate the temperature deviation between the two. The mixing valve 18 is controlled via the drive device 22.

The mixed hot water is supplied from the shower 40 through the switching / flow rate control valve 31 and the shower channel 29. As the mixed hot water temperature at this time, a mixed hot water temperature signal detected by the mixed hot water temperature detector 27 is displayed on the display unit 49 of the setting device 46 via the controller 28. Next, when it becomes necessary to supply hot water from the faucet 39, the hot water supply switch section of the setting device 41
Turn on 43. At this time, the setting of the setting device 46 is canceled,
The instruction from the setter 41 is prioritized, and the switching / control valve 31 is driven by the control valve drive device 38 so as to open the faucet passage 30 and close the shower passage 29. For this reason,
Only by operating the hot water supply switch 43, hot water is switched, and the hot water supply conditions follow the setting of the setting device 41, so that it is safe and error-free. In the mixing operation, the mixing valve 18 is controlled so that the set value of the mixed hot water temperature setting unit 42 is obtained as in the case of using the shower 40. The flow rate setting unit 44 of the setter 41 has a function of setting the instantaneous flow rate, and the controller 28 switches and controls the valve based on the signal and set value of the flow rate detector 50 so that the set flow rate can be obtained. 31 controls and adjusts the opening.
The mixed hot water temperature and the instantaneous flow rate value are displayed on the display unit 45 of the setting device 41. Next, when performing a fixed amount of water stop, select a fixed amount of water stop in the flow rate setting unit 41 of the setting device 41,
The 50 signals are integrated in controller 28. When the value reaches a predetermined value, the control valve drive device 38 drives the switching / control valve 31 in response to a command from the controller 28, and stops hot water supply from the faucet 39 to, for example, a bathtub. Note that the flow rate detector 50 used for these applications
Is provided on the downstream side of the switching / flow rate control valve 31, it is possible to prevent malfunction due to flow disturbance when the shower is used.

In the present embodiment, the setting device 41 is a mixed hot water temperature, an instantaneous flow rate,
Since the integrated flow rate can be set, hot water supply conditions can be set in one place, and a light touch operation can be performed instead of the heavy operation like the conventional knob operation. Further, since the flow rate detector 50 is provided downstream of the switching / flow rate control valve 31, the structure can be simplified and malfunction can be prevented.

Effects of the Invention As described above, according to the hot and cold water mixing apparatus of the present invention, the following effects can be obtained.

(1) Since the switching and flow control of the flow paths can be performed by the switching and flow control valve, a special water stop valve is not required for each flow path, so that pressure loss can be reduced and the configuration can be simplified.

(2) Instructions and temperature settings of the hot water supply destination of the mixed hot water can be performed by setting devices provided at the hot water supply destinations, and the valve is driven by the mixed valve drive device and the control valve drive device, so that the operation is simple and easy. You can do it.

(3) The hot water is supplied by switching the flow path to the hot water supply destination as instructed by the setting device, and is also set by the other setting device in order to switch and supply the mixed hot water temperature set by the setting device on the instructed side. It is safe and easy to operate because it does not supply hot water of temperature.

[Brief description of drawings]

FIG. 1 is a sectional view of a hot and cold water mixing apparatus according to an embodiment of the present invention, FIG. 2 is an external view of a conventional hot and cold water mixing apparatus, and FIG. 3 is a flow path configuration diagram of the same. 14 …… Hot water flow path, 15 …… Water flow path, 18 …… Mixing valve, 22 …… Mixing valve drive device, 26 …… Mixed hot water flow path, 27 …… Mixed hot water temperature detector, 28 …… Controller, 29 ... Shower channel (first channel), 30 ... Faucet channel (second channel), 31 ... Switching and flow control valve, 38 ... Control valve drive device, 41, 46 ... Setting device.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location 6909-3L F24D 17/00 F

Claims (1)

[Claims] 1. A mixing valve for adjusting a mixing ratio of hot water and water supplied through the hot water flow path and the water flow path, a mixing valve drive device for driving the mixing valve, and a mixed hot water flow path through which the mixed hot water passes. The mixed hot water temperature detector provided, the first flow path branched from the mixed hot water flow path, the second flow path, the first flow path, and the second flow path are switched and the water is stopped. A switching / flow rate control valve to perform, a control valve drive device for driving the switching / flow rate control valve, a set hot water temperature and a setter for instructing start / stop of the hot water supply, which are respectively provided at hot water supply destinations of the hot water mix. The hot water is supplied by controlling the control valve drive device to the hot water supply destination instructed by the setting device and switching the flow path, and the mixed hot water temperature set by the setter on the instructed side and the signal of the mixed hot water temperature detector are supplied. A hot and cold water mixing device comprising a controller for comparing and controlling the mixing valve driving device.