JPH0650449B2 - Hot water mixing controller - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing control device that adjusts 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 control device of this type is shown in FIG. Third
In the figure, 1 is a water supply port, 2 is a hot water supply port, 3 is a mixed hot water outlet,
4a is a water side valve, 4b is a hot water side valve, 4c is a valve shaft of the water side valve 4b and the hot water side valve 4c, and the water side valve 4a and the hot water side valve 4b form a mixing valve 4. Reference numerals 5 and 6 denote rotary linear motion exchange sections, which are a first drive means 7 and a second drive means 8 (for example, a motor).
The rotary motion from is converted into a linear motion and transmitted to the water side valve 4a and the hot water side valve 4b via the valve shaft 4c. Reference numeral 9 is a mixed hot water temperature detecting means, and 10 is a flow rate detecting means, which is input to the control unit 11. 12
Sets the outlet hot water temperature by the mixed hot water temperature setting means.

Next, the operation will be described. Mixed hot water temperature detecting means 9 for controlling the hot water temperature set to the hot water temperature value set by the mixed hot water temperature setting means 12.
The present hot water discharge temperature is detected from the first drive means 7 and the second
The driving means 8 is energized. If the mixed hot water temperature is lower than the set hot water temperature, the second drive means 8 is urged in the direction of opening the hot water side valve 4b. Further, the first drive means 7 is biased in the direction of closing the water side valve 4a. If the tap water temperature is higher than the set temperature, the reverse operation is performed. In this way, the mixing valve 4 is adjusted so as to reach the set hot water temperature.

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

At the start of tapping, if the hot water remaining in the vicinity of the mixed hot water temperature detecting means 9 is lower than the set temperature, the hot water side valve 4b opens first and when the hot water temperature exceeds the set temperature, the hot water side valve 4a is opened and at the same time the hot water side valve 4b is closed. In some cases, the hot water in the pipe at the start of hot water discharge is all hot and the mixed hot water temperature detecting means 9 detects the temperature of the atmosphere. Of course, since the temperature is lower than the set temperature, the hot water side valve 4b is opened first. The hot water flows, the mixed hot water temperature detecting means 9 detects the hot water state, and the water side valve 4a is opened. Therefore, the user will use hot water after starting the hot water, and there is a risk of burns. Also, if it is used for showers, etc., it will endanger life.

The present invention has been made in view of the above points, and an object of the present invention is to provide a safe hot and cold water mixing control device that has a simple structure and does not use hot water.

Means for Solving the Problems To solve the above problems, the hot and cold water mixing control device of the present invention is provided with a water mixing valve including a mixing valve including a water side valve for adjusting the water amount and the hot water amount, and a water side valve. First driving means for urging and second driving means for urging the hot water valve, and first and second urging amount setting means for setting urging amounts of the first and second driving means. A flow rate detecting means for detecting a hot water discharge amount, a first hot water discharge amount setting means for setting an initial flow rate, a mixed hot water temperature setting means for setting a mixed hot water temperature adjusted by a mixing valve, and a mixed hot water temperature. Mixed hot water temperature detecting means, temperature deviation detecting means for detecting temperature deviation from the mixed hot water temperature setting means and mixed hot water temperature detecting means, and a flow rate for detecting flow rate deviation from the flow rate detecting means and the first hot water amount setting means. The first hot water discharge amount has priority over the deviation detection means and the output signal of the temperature deviation detection means at the time of starting hot water discharge. The second drive means is stopped based on the flow rate deviation between the setting means and the flow rate detection means. When the first drive means is energized to enter within a predetermined flow rate, the second drive means is activated based on the temperature deviation signal. And a priority circuit for energizing.

Action At the start of tapping, open the water valve before opening the hot water valve. Therefore, only water flows first and the water side valve is opened until the amount of hot water discharged from the first amount of hot water discharge setting means is reached. Next, open the hot water valve to adjust the hot water temperature. In this way, the user does not have to handle hot water suddenly at the start of tapping, which is extremely safe.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a control block diagram of a hot and cold water mixing control device according to the present invention,
The same parts as those in FIG. 2 are designated by the same reference numerals.

In FIG. 1, reference numeral 13 is a first hot water discharge amount setting means for determining the amount of water at the start of hot water discharge. Reference numeral 14 is a second hot water discharge amount setting means for setting the mixed hot water amount desired by the user. Reference numeral 15 is a flow rate deviation detecting means for detecting a deviation from the set flow rate. Reference numeral 16 denotes a temperature deviation detection circuit, which calculates the deviation between the mixed hot water temperature value and the set temperature. 17
Is the priority circuit, and if there is a temperature deviation at the start of tapping, the first
The first drive means 7 until the set value of the hot water discharge amount setting means is reached.
Outputs a signal that activates only. 18 and 19 are first and second biasing amount setting means, which are first and second driving means 7,
The urging amount of 8 is determined based on the output signal of the priority circuit 17.

Next, the operation of the above configuration will be described. At the start of tapping, the priority circuit 17 outputs a signal for stopping the second drive means 8. Next, the flow rate deviation is detected based on the signal of the first hot water discharge amount setting means 13 and the first biasing amount setting means 18 is given priority over the signal of the second hot water discharge amount setting means 14 set by the user. The first drive means 7 is urged via. That is, only the water side is opened and the value is set to the set value of the first hot water discharge amount setting means 13. Next, the priority circuit 17
Detects that the set amount of water has been reached, the temperature deviation detection means 1
Based on the signal of 6, the second drive means 8 is biased to open the hot water side. That is, the water side is poured first and the hot water side is opened later to adjust the hot water temperature. In this way, the risk of users using hot water is prevented.

EFFECTS OF THE INVENTION As described above, according to the hot and cold water mixing control device of the present invention, the priority circuit allows the user to activate the water side valve at the time of starting hot water to preferentially control the hot water temperature control until the set flow rate is reached. It has a highly safe and easy-to-use effect that does not suddenly cause the human body to fall into an abnormally dangerous state by using boiling water.

[Brief description of drawings]

FIG. 1 is a control block diagram of a hot and cold water mixing controller according to an embodiment of the present invention, and FIG. 2 is a system diagram of a conventional hot and cold water mixing controller. 4 ... Mixing valve (4a ... Water side valve, 4b ... Hot water side valve), 7
...... First driving means, 8 ...... Second driving means, 10 ......
Flow rate detecting means, 13 ... First hot water discharge amount setting means, 15 ...
... Flow rate deviation detection means, 17 ... Priority circuit, 18 ... First
Urging amount setting means 19 ... Second urging amount setting means.

Claims (1)

[Claims] 1. A mixing valve including a water side valve and a hot water side valve for adjusting the amount of water and the amount of hot water, a first drive means for urging the water side valve, and a second drive means for urging the hot water side valve. Drive means, first and second urging amount setting means for setting urging amounts of the first and second driving means, flow rate detecting means for detecting a hot water discharge amount, and first for setting an initial flow rate. Hot water amount setting means, mixed hot water temperature setting means for setting the mixed hot water temperature adjusted by the mixing valve, mixed hot water temperature detecting means for detecting the mixed hot water temperature, the mixed hot water temperature setting means, and the mixed hot water temperature. Temperature deviation detecting means for detecting a temperature deviation from the detecting means, flow rate deviation detecting means for detecting a flow rate deviation from the flow rate detecting means and the first hot water amount setting means, and output of the hot water starting temperature deviation detecting means Also, the flow rate deviation between the first hot water discharge amount setting means and the flow rate detecting means is prioritized over the signal. And a hot water mixing circuit comprising a priority circuit for activating the second driving means based on a temperature deviation signal when the second driving means is stopped and the first driving means is energized to enter a predetermined flow rate. Control device.