JPH01217152A - Hot water feeding control device for hot water heater - Google Patents

Abstract

PURPOSE:To enable a desired amount of hot water having a predetermined temperature to be supplied to a bath tub by a method wherein data measured by a temperature measuring means and data set by a setting means are applied to calculate an amount of hot water to be supplied and an alarm is generated when a practical amount of hot water supplied reaches the calculated value. CONSTITUTION:A water temperature measured by a water temperature measuring means 6 is equal to a water temperature passing through a tap 4, wherein this value is defined as Tc and a hot water temperature measured by a hot water temperature measuring means 8 is deifend as Th. In case that a hot water within a bath tub 5 is increased up to a predetermined temperature T1, if a proper amount of hot water set by a proper amount setting means is Vs, an amount of hot water Vh to be fed from the tap 3 to the bath tub 5 can be calculated by an equation of Vh=Vs(T 1-Tc)/(Th-Tc). A calculation controlling means 12 may calculate a value of Vh in reference to the values of Tc, T1 and Vs, open the tap 3 and start to feed hot water. A numerical value got from the amount ot water measuring means 7 is examined by the calculation controlling means 12. When this value coincides with Vh, it may control an alarm means 13 to generate an alarm and at this time the tap 3 is closed and the tap 4 is opened to feed water until an amount of hot water within the bath tab 5 becomes a desired value Vs.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hot water supply control device for a water heater for pouring a desired amount of hot water at a predetermined temperature into a water tank such as a bathtub.

[Prior Art] Fig. 7 is a block diagram showing a conventional device, in which (1) is a hot water storage tank, (2) is a heating element, (3) is a faucet on the hot water side, and (4) is on the water side. The faucet (5) is a bathtub.

To fill the bathtub (5) with hot water, set the temperature of the hot water to T1 (referred to as a predetermined temperature) and set the amount of hot water to Vs (referred to as a desired amount).
It is necessary to do so. In Figure 7, water is stored in a hot water tank (1
) flows into the hot water storage tank (1) through the water inlet (101) under water pressure from a pump, etc.
The same amount of hot water that flows in from the water supply port (102>) flows out from the water supply port (102>. Therefore, when there is no hot water flowing out, the water supply port (101)
There is no inflow of water.

The water in the lower part of the hot water storage tank <1) is heated to a constant temperature by the heating element (2), and when the faucet (3) is opened, hot water is supplied to the bathtub. Furthermore, the heat generated by the heating element (2) is automatically controlled so that the temperature near the hot water supply port (102) is approximately constant.

In order to make the above-mentioned bathtub (5) have a temperature of Tl and a volume of and adjusting the volume of hot water.

[Problems to be Solved by the Invention] In the conventional method, it is not easy to adjust the hot water in the bathtub (5) to the temperature Tl and the volume Vs. For example, if too much hot water comes in from the faucet (3), if the volume is maintained at Vs, the temperature will become higher than 71, and if the volume is maintained at Vs, the temperature will rise above 71. If water is poured into the tank, the volume will be larger than Vs, and to avoid this situation, the faucets (3) and (4) must be alternately opened and closed frequently.

This invention was made in order to solve the above-mentioned problems in the conventional ones. It is an object of the present invention to provide a hot water supply control device for a water heater that can bring the temperature of T1 to a target temperature T1.

[Means for Solving the Problems] In the present invention, a water temperature measuring means, a hot water temperature measuring means, a water amount measuring means, and an appropriate amount setting means (the above Vs is referred to as an appropriate amount) are provided, and the data measured by these temperature measuring means and the setting means are used. The amount of hot water that should be supplied from the faucet is calculated using the set data, and an alarm is issued when the amount of hot water actually supplied reaches the calculated value.

[Function] If the hot water supply from the water heater is stopped at the time when the alarm is not issued, and water is replenished until the amount of hot water in the bathtub reaches the desired amount Vs, the hot water at the predetermined temperature T1 can be supplied to the desired amount Vs. You can only get

[Examples] Examples of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram showing an embodiment of the invention as claimed in claim 1. In the figure, the same reference numerals as in FIG. Measure the temperature of the supplied water. (7) is a water supply amount measuring means that measures the amount of water supplied into the hot water storage tank (1). (8) is a hot water temperature measuring means for measuring the temperature of hot water near the hot water supply opening, (11) is an appropriate amount setting means for setting a desired i V s, (12) is an arithmetic control means, and (13) is an alarm means. be.

The water temperature measured by the water temperature measuring means (6) is equal to the water temperature of the water passing through the faucet (4), and this value is taken as Tc, and the water temperature measured by the hot water temperature measuring means (8) is taken as Th. ), when the appropriate amount set by the appropriate amount setting means is Vs, the amount of hot water Vh to be supplied from the faucet (3) to the bathtub (5) is Vh. =Vs ('r' 1-Tc) / (Th-T
c). Arithmetic control means (
12) calculates the value of Vh from the values of Tc, Th, Tl, and Vs, and opens the faucet (3) to start supplying hot water. The water amount measuring means (7) measures the integrated value of the amount of water that has passed through this part and been supplied to the hot water storage tank (1) (this value is the amount of hot water that has passed through the faucet (3) and been supplied into the bathtub (5)). (representing the integrated amount) is sent to the calculation control means (12). The arithmetic control means (12) checks the numerical value from the water amount measuring means (7), and when it matches Vh, controls the alarm means (13) to issue an alarm.

At the time of this alarm, the faucet (3) is closed, the faucet (4) is opened, and water is supplied until the amount of hot water in the bathtub <5> reaches the desired value Vs.

Figure 2 is a connection diagram showing the electric circuit part in Figure 1, where the same symbols as in Figure 1 indicate the same or equivalent parts, and the water temperature measuring means (6) and hot water temperature measuring means (8) are thermistors, respectively. The suitable amount setting means (11) is composed of a fixed resistor (29) and a variable resistor (28) connected in series. The arithmetic control means (12) includes an analog multiplexer (17) and an analog-to-digital conversion circuit (hereinafter abbreviated as A/D) (1
8), input circuit (19), CPU (15), memory (1
6) and an output circuit (20). Also (71
) is a current meter that generates pulses with a frequency proportional to the flow velocity;
(33) is a counter that counts these pulses. Note that the count value of the counter (33) represents the integrated value of the amount of water. (21
) is a transistor array, (25) is an LED for numerical display
, the amount set by the appropriate amount setting means (11) is displayed. Further, (27) is a buzzer used as the alarm means (13).

The operation within the arithmetic control means (12) is executed by program control, and FIG. 3 shows the arithmetic control means (12) in FIG.
In flowchart 1 showing the operation, (34) to (43)
represent each step.

FIG. 4 is a block diagram showing an embodiment of the invention as claimed in claim 2. In the figure, the same reference numerals as in FIG. 1 indicate the same or corresponding parts, and (9) is inserted into the hot water supply pipe. A solenoid valve (10) controls the flow of hot water, and is a solenoid valve control means that controls the solenoid valve (9). The device shown in FIG. 4 not only issues an alarm at the point when hot water supply should be stopped, but also automatically stops the hot water supply (i.e., by controlling the solenoid valve (9) by the solenoid valve control means (10)). However, other operations are similar to the device shown in FIG.

In addition, Fig. 5 is a connection diagram showing parts of the electric circuit in Fig. 4. In Fig. 5, the same symbols as in Fig. 2 indicate the same or corresponding parts, (22) is a relay, and (23) is a solenoid valve. (9)
The power source (24) is an actuator that operates the solenoid valve (9).

At the same time that the signal is supplied to the buzzer (27), current is applied to the coil of the relay (22), which closes its contacts and operates the actuator (24) to close the solenoid valve (9). It has become.

6 is a flowchart showing the operation of the device shown in FIG. 4. In FIG. 6, the same reference numerals as in FIG. (9) is the step of opening and closing. In addition, in FIG. 3, the faucet is closed in step (43) after hearing the buzzer in step (42).
In FIG. 6, if the determination in step (41) is Yes, step (45) is entered and the solenoid valve (9) is automatically closed. Therefore, the operator must perform step (42) in FIG.
When you hear the buzzer, you can start opening the faucet (4) on the water supply side.

[Effect of the invention] As described above, according to the present invention, by simple operation,
This has the effect of supplying a desired amount of hot water at a predetermined temperature to the bathtub.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the invention as claimed in claim 1, FIG. 2 is a connection diagram showing a portion of the electric circuit shown in FIG. 1, and FIG. 3 is a flow chart showing the operation of the device shown in FIG. 1. , 4th
The figure is a block diagram showing an embodiment of the invention according to claim 2,
5 is a connection diagram showing a portion of the electric circuit shown in FIG. 4, FIG. 6 is a flowchart showing the operation of the device shown in FIG. 4, and FIG. 7 is a block diagram showing a conventional device. (1) is a hot water storage tank, (2) is a heating element, (3>, (
4) is a faucet, (5) is a bathtub, (6) is a water temperature measuring means, (7) is a water quantity measuring means, (8) is a hot water temperature measuring means,
(9) is a solenoid valve, (10) is a solenoid valve control means, (11)
(12) is an arithmetic control means, and (13) is an alarm means. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) In order to mix hot water from the water heater and water from the water supply device in one water tank to generate a desired amount of hot water at a predetermined temperature, the amount of hot water supplied from the water heater to the water tank is In a hot water supply control device for a water heater to be controlled, the water heater has a heating element at the bottom of the hot water storage tank, and the water at the same temperature as the water provided at the bottom of the hot water storage tank and supplied from the water supply device to the water tank is supplied from the outside. A water supply port that is supplied to the hot water storage tank by water pressure; A hot water supply port that is provided at the top of the hot water storage tank and that discharges the same amount of hot water from the hot water storage tank to the outside as the water supplied from the water supply port; A water temperature measuring means that is connected to a water supply pipe leading to the water tank and stops discharging hot water from the water supply pipe, and measures the temperature of the water supplied to the water supply port, and measures the amount of water flowing into the water supply port. water temperature measurement means for measuring the temperature of hot water near the hot water supply opening; appropriate amount setting means for setting a desired amount of hot water in the water tank; a predetermined temperature of the hot water in the water tank is T1; The temperature measured by the measuring means and the hot water temperature measuring means is Tc, respectively.
Let Th be the amount of hot water set by the appropriate amount setting means above, and let Vs be the amount of hot water set by the appropriate amount setting means, then input these values and calculate Vh = Vs (T1 - Tc).
/(Th-Tc); and means for generating an alarm when the measured value of the water amount measuring means matches Vh after starting hot water supply from the faucet. A hot water supply control device for a water heater. (2) In order to mix hot water from the water heater and water from the water supply device in one water tank to produce a desired amount of hot water at a predetermined temperature, the amount of hot water supplied from the water heater to the water tank is In a hot water supply control device for a water heater to be controlled, the water heater has a heating element at the bottom of the hot water storage tank, and the water at the same temperature as the water provided at the bottom of the hot water storage tank and supplied from the water supply device to the water tank is supplied from the outside. A water supply port that is supplied to the hot water storage tank by water pressure; A hot water supply port that is provided at the top of the hot water storage tank and that discharges the same amount of hot water from the hot water storage tank to the outside as the water supplied from the water supply port; a solenoid valve that is connected to and inserted into a hot water pipe leading to the water tank and controls the discharge of hot water from the hot water pipe; a water temperature measuring means that measures the temperature of the water supplied to the water supply port; A water amount measuring means for measuring the amount of water; a hot water temperature measuring means for measuring the temperature of hot water near the hot water supply opening; an appropriate amount setting means for setting a desired amount of hot water in the water tank; a predetermined temperature of the hot water in the water tank is set as T1; The temperatures measured by the water temperature measuring means and the hot water temperature measuring means are respectively Tc,
Let Th be the amount of hot water set by the appropriate amount setting means above, and let Vs be the amount of hot water set by the appropriate amount setting means, then input these values and calculate Vh = Vs (T1 - Tc).
means for calculating Vh by calculating /(Th-Tc); generating an alarm when the measured value of the water amount measuring means matches Vh after starting hot water supply from the water supply pipe; and controlling the solenoid valve. A hot water supply control device for a water heater, comprising means for blocking the hot water supply pipe.