JPH076636B2 - 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.

In FIG. 3, 1 is a water supply port, 2 is a mixed hot water outlet, and 3 is a mixing valve for adjusting the mixing ratio of hot and cold water. The mixing valve 3 includes a water side valve 3a, a hot water side valve 3b, springs 3c and 3d for urging the hot water and water side valves 3a and 3b inward, and a shaft fixed to the water side valve 3a and the hot water side valve 3b. It becomes with 3e. The roller 4 is attached to the tip of the shaft 3e and contacts the cam 5. Reference numeral 6 is a drive means (for example, a motor) which fixes the cam 5 to the drive shaft. 7 is a heat source means, which is a mixing valve 3
The hot water is supplied through the pipe 8. Reference numeral 9 is a mixed hot water temperature detecting means for detecting the mixed hot water temperature, and 10 is a mixed hot water temperature setting means.
Reference numeral 11 denotes a control device, which compares the output signals of the mixed hot water temperature detection means 9 and the mixed hot water temperature setting means 10 to energize the drive means 6.

Next, the operation will be described. The controller 11 compares the mixed hot water temperature detected by the mixed hot water temperature detecting means 9 with the set value of the mixed hot water temperature setting means 10, and energizes the drive means 6. When the drive means 6 is energized, the valve position of the mixing valve 3 changes via the cam 5, and the mixing ratio of hot water changes. In this way, the mixing valve 3 is adjusted via the control device 11 so as to reach the set hot water temperature.

Problems to be Solved by the Invention However, the above configuration has the following problems. When the discharge of the mixed hot water is stopped for a long time, the temperature of the hot water inside the pipe 8 from the heat source means 7 to the mixing valve 3 is reduced because heat is not supplied and a radiation loss occurs. Next, when the user starts tapping to use hot water of a certain set temperature, the hot water to be supplied is mixed with the cold hot water in the pipe 8 by the mixing valve 3 until hot water comes out from the heat source means 7. . Therefore, if the user has set a high hot water temperature other than the hot water temperature, the mixing valve 3 opens the hot water side.
However, when cold and hot water in the pipe flows out, high temperature hot water suddenly enters the mixing valve 3, and conversely, even if an attempt is made to close the hot water side with the mixing valve 3 and open the water side, it is not possible to instantaneously adjust the set temperature. Therefore, the user suddenly uses hot water, which is very dangerous. In addition, if mixed hot water is used for the shower, it may cause life hazard such as burns.

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

Means for Solving the Problems A hot and cold water mixing control device according to the present invention includes a mixing valve for adjusting a mixing ratio of hot water and water, a driving means for urging the mixing valve, and a mixed hot water temperature for detecting a mixed hot water temperature. A detecting means, a mixed hot water temperature setting means for setting a mixed hot water temperature, a mixed hot water temperature detecting means, and a mixed hot water temperature setting means for detecting a temperature deviation and setting an urging amount of the driving means. A power supply setting means, a supply hot water temperature detecting means for detecting a hot water temperature supplied to the mixing valve, a supply hot water temperature setting means for setting a hot water temperature to be compared with an output signal of the supply hot water temperature detecting means, and the supply Comparing the hot water temperature detecting means and the hot water supply temperature setting means, and comparing means for outputting a signal to the urging amount setting means when the hot water supply temperature is lower than the set value of the hot water supply temperature setting means And the urging amount setting means stops the driving means when the signal is received. It is characterized in that it outputs a stop signal.

Action The present invention has the above-described configuration, forcibly stops the drive of the mixing valve until the temperature of the hot water supplied to the mixing valve reaches a certain temperature or higher,
When the supplied hot water temperature becomes high, the hot water temperature is controlled by the mixing valve and the hot water temperature is opened to prevent the hot water from coming out.

EXAMPLES Examples of the present invention will be described below with reference to the accompanying drawings.
1 and 2, the same parts as those in FIG. 3 are designated by the same reference numerals. In FIG. 1, reference numeral 12 is a supply hot water temperature detecting means. In Figure 2
Reference numeral 13 is a supply hot water temperature setting means, and its output part is connected to the comparison means 14 together with the supply hot water temperature detecting means 12. Reference numeral 15 is a deviation detecting means, to which the output parts of the mixed hot water temperature detecting means 9 and the mixed hot water temperature setting means 10 are connected. Reference numeral 16 is an energizing amount setting means, which sets the energizing amount of the driving means 6 based on the output signal of the deviation detecting means 15 or controls the operation or stop of the driving means 6 based on the output signal of the comparing means 14. Do.

With the above configuration, the hot water supply temperature in the pipe 8 is set by the hot water supply temperature setting means 13
If it is greater than or equal to the set value of, the comparison means 14 to the bias amount setting means 16
The driving signal of the driving means 6 is output to. The mixing valve 3 adjusts the mixing ratio by a deviation signal obtained from the detected hot water temperature of the mixed hot water temperature detection means 9 and the set temperature of the mixed hot water temperature setting means 10 to control to the set hot water temperature.

When the user stops using hot water for showering or cooking, the flow of hot water supplied from the heat source means 7 through the pipe 8 is stopped. Therefore, the temperature of the supplied hot water is lowered by the heat radiation from the pipe 8 to become cold / hot water. Next, when the hot water supply is equal to or lower than the set temperature when the user re-emerges hot water, a signal is output from the comparison means 14 to the bias amount setting means, and in response to this, the bias amount setting means is driven by the driving means. Outputs a stop signal to stop driving. As a result, the driving means is stopped in preference to the output signal from the deviation detecting means 15 which has controlled the energizing amount of the mixing valve 3 until then, so that the mixing hot water temperature decreases due to the decrease in the supplied hot water temperature. , The opening degree of the hot water side valve 3b of the mixing valve 3 is large,
The water side valve 3a is not controlled to be small.

Therefore, the opening degrees of the water side valve 3a and the hot water side valve 3b of the mixing valve 3, that is, the mixing ratio remains the same as the previous setting, and hot water does not suddenly come out, which is very safe and easy to use.

EFFECTS OF THE INVENTION As described above, according to the hot and cold water mixing control device of the present invention, when the hot water supply is set at the preset temperature or less when the hot water is discharged again, the hot water temperature adjustment control of the mixing valve is forcibly stopped. However, when the hot water supply temperature detection means detects that the hot water supply temperature to the mixing valve has exceeded the set temperature, the stop control of the mixing valve is released, so that the user does not use hot water and is at risk of life. It is extremely safe and easy to use without giving.

[Brief description of drawings]

FIG. 1 is an overall system diagram of a hot and cold water mixing control device according to an embodiment of the present invention, FIG. 2 is a block diagram of the same, and FIG. 3 is a system diagram of a conventional hot and cold water mixing control device. 3 ... Mixing valve, 6 ... Driving means, 7 ... Heat source means, 8 ...
… Piping, 9 …… Mixed hot water temperature detecting means, 10 …… Mixed hot water temperature setting means, 12 …… Supply hot water temperature detecting means, 13 …… Supply hot water temperature setting means, 14 …… Comparison means, 15 …… Deviation detection Means, 16 ... Energizing amount setting means.

Claims (1)

[Claims] 1. A mixing valve for adjusting a mixing ratio of hot water and water,
Driving means for urging the mixing valve, mixed hot water temperature detecting means for detecting the mixed hot water temperature, mixed hot water temperature setting means for setting the mixed hot water temperature, the mixed hot water temperature detecting means and the mixed hot water temperature setting means Deviation detecting means for detecting a temperature deviation from the above, an energizing amount setting means for setting an energizing amount of the driving means according to the magnitude of the deviation signal obtained by the deviation detecting means, and hot water supplied to the mixing valve. And a pipe for supplying hot water from the heat source means to the mixing valve, a supply hot water temperature detecting device attached to the pipe, and a temperature to be compared with an output signal of the supply hot water temperature detecting device. The output signals of the hot water supply temperature setting means, the hot water supply temperature detecting means, and the hot water supply temperature setting means are compared, and when the hot water supply temperature is lower than the set value of the hot water supply temperature setting means, the urging amount is set. Comparing means for outputting a signal to the setting means, Hot and cold water mixing controller the biasing amount setting means when receiving, characterized in that it outputs a stop signal for stopping the driving means.