JPH07117859B2 - 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 Conventionally, this kind of hot and cold water mixing device has been shown in FIG. (For example, Japanese Utility Model Laid-Open No. 55-59223) In FIG. 3, inside a valve frame body 4 having an inlet 1 for hot water, an inlet 2 for water and an outlet 3 for mixed hot water, a hot water valve 5 and water A side valve body 6 is provided. The water-side valve body 5 and the water-side valve body 6 have a shaft 7
And is driven by a motor 10 via a linear motion conversion mechanism 8 and a gear 9 provided outside. A mixed hot water temperature detector 11 for detecting the mixed hot water temperature is provided in the vicinity of the mixed hot water outlet 3, and the mixed hot water temperature value set by the mixed hot water temperature setting device 12 is provided.
The controller 13 compares the hot water temperature values detected by the mixed hot water temperature detector 11 to control the motor 10. The terminal is provided with a faucet 14 for supplying mixed hot water. Then, the faucet 14 is opened, and the mixed hot water temperature setting device 12 is manually operated to set the mixed hot water temperature, and the controller 13 compares the value of the mixed hot water temperature detector 11 with the set value of the mixed hot water temperature. The motor 10 is drive-controlled so as to eliminate the temperature deviation.

Problems to be Solved by the Invention (1) In addition to operating the mixed hot water temperature setting device 12 as a hot water supply operation, it is necessary to operate the faucet 14, which is heavy and time consuming.

(2) In addition to the valve body for adjusting the temperature of the mixed hot water as the hot water mixing device, a faucet for adjusting the flow rate is required.

(3) The remote control operation for adjusting the flow rate could not be performed.

The present invention is to solve the above-mentioned conventional problems.
It is an object of the present invention to provide a hot and cold water mixing device that automatically adjusts a mixed hot water temperature and a mixed flow rate by independently providing a control valve on the water side.

Means for Solving Problems The hot and cold water mixing apparatus of the present invention in order to solve the above problems,
A hot water control valve that controls the flow rate of hot water, a water control valve that controls the flow rate of water, a hot water control valve drive device and a water control valve drive device that drive these valves, and a mixing chamber that mixes hot water and water. , A mixed hot water temperature detector for detecting the temperature of the mixed hot water, a flow rate detector for detecting the flow rate of the mixed hot water, a hot water supply switch for instructing hot water supply at a preset mixed hot water temperature and the mixed hot water flow rate, and this hot water supply In response to a hot water supply start instruction of the switch, first, the hot water control valve and the water control valve are opened, and a predetermined mixed hot water flow rate and the signal of the flow rate detector are compared to adjust the flow rate, and then the mixed hot water temperature and the mixed hot water temperature. Equipped with a hot water control valve drive device and a controller that stops the water control valve drive device when temperature control is performed based on the signal of the detector, and when the signal of the flow rate detector falls below a predetermined value at which water stoppage can be secured. It is a thing.

With the above-described configuration, the present invention opens the hot water control valve and the water control valve by the hot water supply start instruction of the hot water supply switch, and first compares the mixed hot water flow rate and the signal of the flow rate detector to compare the hot water control valve drive device and the water control valve. The valve drive device is controlled to adjust the flow rate, and then the hot water control valve drive device and the water control valve drive device are controlled based on the signals of the mixed hot water temperature and the mixed hot water temperature detector to adjust the temperature, In addition to realizing automatic adjustment of temperature and mixed flow rate, when the signal from the flow rate detector falls below a predetermined value that can ensure water stoppage, the hot water control valve drive device and the water control valve drive device are stopped to stop hot water supply. The water is surely stopped.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a diagram showing a cross section of a hot and cold water mixing apparatus according to an embodiment of the present invention. Hot water and water supplied from the hot water flow path 16 and the water flow path 17 are adjusted by a pressure regulating valve 19 provided in the valve frame body 18 so as to have equal pressures. The regulated hot water and water reach the hot water control valve 20 for controlling the flow rate of hot water and the water control valve 21 for controlling the flow rate of water having the same shape. The hot water control valve 20 is driven by a hot water side motor 22 which is an external hot water control valve drive device, and the hot water control valve 21
Is driven by a water side motor 23 which is a water control valve drive device. The rotary motions of the hot water motor 22 and the water motor 23 are decelerated and converted into linear motions by the conversion mechanisms 24 and 25, and the hot water control valve 20 and the water control valve 21 are driven linearly. The hot water and water adjusted by the hot water control valve 20 and the water control valve 21 are
Mixing is done in the mixing chamber 26, and the mixed hot water temperature detector 27 and the flow rate detector 28
After that, the hot water is supplied from the mixed hot water flow path 29 to the hot water supply port 30 for hot water supply. A setting device 31 is provided near the hot water supply port 30. In the setting device 31, a switch 32 which is a hot water supply switch for instructing the flow rate "low", the mixed hot water temperature "suitable temperature" and the start of hot water supply at the same time, the flow rate "high", the mixed hot water temperature "suitable temperature" and the integrated flow rate. A switch 33 for instructing at the same time is provided, and the flow rate value, the mixed hot water temperature, and the integrated flow rate value can be set in advance. Further, the setter 31 includes a switch 34 for instructing stepwise by the number of times to press the rise of the mixed hot water temperature, a switch 35 for instructing the decrease, a display unit 36 for displaying the mixed hot water temperature and the flow rate, and a hot water supply switch for stopping the hot water supply. A stop switch 37 is provided. The signal from the setter 31 and the signals from the mixed hot water temperature detector 27 and the flow rate detector 28 are taken into the controller 38, and the controller 38 drives and controls the hot water side motor 22 and the water side motor 23. FIG. 3 shows a control block diagram of this embodiment. The signal from the setter 31 is compared with the signal of the mixed hot water temperature detector 27, the signal of the flow rate detector 28, and the integrated signal of the signal of the flow rate detector 28 in the controller 38, and the deviation thereof is adjusted by the adjusting unit 39.
Is calculated and amplified by. The hot water side motor 22 and the water side motor 23 are controlled by the signal of the adjusting section 39, and the hot water adjusting valve 20 and the water adjusting valve 21 adjust the mixing ratio and the flow rate or stop the hot water supply. The mixed hot water temperature and the flow rate of the mixed hot water are fed back to the controller 38 by the mixed hot water temperature detector 27 and the flow rate detector 28.

The operation of this embodiment will be described. When the switch 32 of the setting device 31 is pushed, this switch corresponds to the flow rate "small" and the mixed hot water temperature "appropriate temperature". In order to open the control valve 21 in the same direction, the hot water motor 22
When the flow rate signal obtained by controlling the water side motor 23 and the flow rate detector 28 reaches the set value, the hot water control valve 20 and the water control valve
21 is operated in the opposite direction, and the mixed hot water temperature is adjusted to a predetermined temperature without changing the mixed flow rate. In the hot and cold water mixing device equipped with the hot water control valve 20 and the water control valve 21, by first adjusting the flow rate at the start of hot water supply and then adjusting the temperature, the flow of hot water and water is reliably ensured and the hot water flow path The discharge of accumulated hot water and water in the water flow channel can be promoted, and the set temperature can be obtained quickly. If you want to raise or lower the temperature of the mixed water more, you can press switch 34 or 35 to make fine adjustment.
It is possible to leave hot water only or hot water only by repeatedly pressing. When the switch 33 is pushed further, the mixing flow rate increases without changing the mixing hot water temperature. In this case, the hot water control valve 20 and the water control valve 21
Are controlled to operate in the same direction. Also switch 33
From the moment when is pressed, the signals of the flow rate detector 28 are integrated in the controller 38, and when reaching a preset value, the hot water control valve 20 and the water control valve 21 are controlled in the closing direction to supply hot water. Stop. The normal stop of hot water supply is achieved by pressing the stop switch 37. At the time of stop, the flow rate detector 28 is used, and the operation of the hot water side motor 22 and the water side motor 23 is stopped when the signal becomes equal to or less than a predetermined value at which water stop can be secured. This prevents the motor from continuing to rotate even after the flow has stopped, coming into contact with the position detection switch at the innermost position of the closing point, and stopping when it is too close to the closing point. This is to speed up the start of hot water supply. Since the hot and cold water mixing apparatus of this embodiment can be electrically controlled, it is also possible to easily control the start and stop of hot water supply by a timer.

The effect in this embodiment is that the hot water control valve 20 and the water control valve 21 are operated in opposite directions when the temperature of the hot water is adjusted, and the hot water control valve 20 is adjusted when the mixed flow rate is adjusted or the hot water supply is stopped.
And the water control valve 21 are operated in the same direction, it is possible to change the temperature of the mixed hot water without changing the mixed flow rate, or to change the mixed flow rate while maintaining the mixed hot water temperature, making it an easy-to-use device. The points are as follows.

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

(1) In conjunction with this, it is possible to instruct hot water supply at a preset hot water temperature and hot water flow rate by simply instructing the hot water supply switch to start hot water supply. In addition, it is possible to realize automatic adjustment of the temperature of the mixed hot water and the mixed flow rate, and it is possible to develop remote control operation.

(2) The hot water control valve and the water control valve can be used to adjust the mixing ratio, adjust the flow rate, and stop water, simplifying the configuration and adjusting the flow rate first when starting hot water supply, and then adjusting the temperature. The flow of hot water and water can be reliably ensured, the accumulated hot water and water in the hot water passage and the water passage can be expelled, and the set temperature can be obtained quickly.

(3) When the hot water supply switch is instructed to stop hot water supply, when the signal from the mixed flow rate detector becomes less than or equal to a predetermined value at which water stoppage can be ensured, regardless of the signal from the hot water supply switch, the hot water control valve drive device and the water control valve Since the drive device is stopped, the water can be reliably stopped even if the hot water control valve drive device and the water control valve drive device are delayed in driving and the flow path cannot be instantaneously blocked.

[Brief description of drawings]

FIG. 1 is a configuration diagram including a partial cross-sectional view of a hot and cold water mixing device according to an embodiment of the present invention, FIG. 2 is a control block diagram of the same device, and FIG. 3 is a configuration diagram showing a conventional hot and cold water mixing device. is there. 20 …… hot water control valve, 21 …… water control valve, 22 …… hot water side motor (hot water control valve drive device), 23 …… water side motor (water control valve drive device), 26 …… mixing chamber, 27… … Mixed water temperature detector, 28…
… Flow rate detector, 31 …… setting device, 38 …… control device.

Claims (1)

[Claims] 1. A hot water control valve for controlling the flow rate of hot water, a water control valve for controlling the flow rate of water, a hot water control valve drive device and a water control valve drive device for driving the hot water control valve and the water control valve. A mixing chamber for mixing hot water and water adjusted by the hot water adjusting valve and the water adjusting valve, a mixed hot water temperature detector for detecting the temperature of the mixed hot water, a flow rate detector for detecting the flow rate of the mixed hot water, A hot water supply switch for instructing hot water supply at a set mixed hot water temperature and a mixed hot water flow rate, and first, by the hot water supply start instruction of the hot water supply switch, the hot water control valve and the water control valve are opened to cause the mixed hot water flow rate and the flow rate detector. Of the hot water control valve drive device and the water control valve drive device to control the flow rate, and then the hot water control valve drive device based on the signals of the mixed hot water temperature and the mixed hot water temperature detector. And the water control valve drive to control the temperature, and the signal from the flow rate detector Water hot and cold water mixing device equipped with a controller for stopping the hot water control valve drive and the water regulating valve actuating device when it becomes less than a predetermined value can be secured.