JPS5892750A - Automatic hot-water supplying system - Google Patents

Abstract

PURPOSE:To precisely determine the total quantity of outputted hot water by a method wherein the sum of pulsating signals yielded by a flow-rate sensor determines the total quantity of outputted hot water and said signals are used to effect proportional control to effect a stable temperature control for the output. CONSTITUTION:A flow-rate sensor 7 is provided in a hot-water supply circuit A, converting flow-rate into pulsating signals. The pulsating signals yielded by the flow-rate sensor 7 are counted by a controller B, and a quantity per unit length of time to meet a prescribed level, determined by the number of pulsating signals per unit length of time, opens an electromagnetic valve 20 for the ignition of a burner 17. A water electromagnetic valve 2 is closed when the total of the pulsating signals, counted from the beginning of the supply of hot water, increases to represent a predetermined total quantity, set in the total hot-water supply setting dial 10, of hot water to be taken out. Pulsating signals are analog- converted before they are supplied to a controller receiving signals from a hot- water temperature detector 8 and signals pertaining to the setting in the hot- water temperature setting dial 11, whereby adjustment is made according to the rate of flow and regulation is made of a proportional valve 9.

Description

[Detailed Description of the Invention] Conventionally, a water supply device always keeps the water supply constant, calculates the water supply time by dividing the set water supply amount by the water supply amount per unit time, and operates the water supply device during this calculation time. A device that automatically stops water supply when the set amount of water supply is reached.
6-/j74 (J) is proposed, which is a so-called time control method. Therefore, it is necessary to install a fixed amount water supply device that keeps the amount of tap water supplied per unit time accurately and constant, and an expensive timer pipe, resulting in high costs. In view of the above-mentioned drawbacks, the present invention provides a low-cost and extremely useful automatic hot water supply system. The total amount of hot water is detected by counting in all the signal controllers, and the supply stops when the set total amount of hot water is reached, and the pulse signal is used to control the proportional control of the hot water temperature in the pipe hot water supply system, as well as the manual signal for blinking the burner. It is extremely useful and can be used as a human signal.

The present invention will be explained below based on the drawings.

Figure 1 shows an embodiment of the automatic hot water supply system according to the present invention, which includes a water supply pipe (1), a normally open water solenoid valve (2) that opens and closes
), a series of water supply lines (b), which have an endothermic pipe (5) with endothermic fins (4) heated by a burner (3) and a burner (5), and a hot water tap (6). All the flow rate sensors (7) that convert the flow rate into pulse signals are installed, and the flow rate sensors (7) are installed.
7) is wired to transmit the pulse signal to the controller (□).The controller (the paddy receives the pulse signal tube from the flow rate sensor (7), and the controller ( B) is equipped with a function to accurately measure the total amount of hot water by counting with the counter 4 installed in 2), a solenoid valve (2) disposed in the gas supply pipe (c) and a heat absorption pipe (5) disposed downstream of the solenoid valve (2) to proportionally supply fuel to the burner (b); Connect the proportional valve (9) that adjusts the heating capacity of the
11. (C) is a remote control box with output Ika amount setting dial QG and hot water temperature setting dial 011. The power switch-1 is equipped with a power lamp (b), a non-ignition buzzer (2), a combustion lamp (b), and a total amount of hot water setting confirmation lamp (161), and is wired to the controller (81 to 151). The flow rate sensor (7) is /, /.

This is a flow rate-pulse converter with good linearity within a practical hot water supply amount range of about 100 yen, for example, a water wheel is freely rotatably installed in the water supply channel (1), a magnet is fully fixed to the blades of the water wheel, and the other hand is connected to the water supply channel (1). All magnetic detection elements such as Halle 0 are installed at the position where the magnetic field of the magnet on the outer periphery acts, and the rotation of the water wheel is converted into an output signal of the magnetic detection element, which is amplified and shaped by a pulse shaper (c). The total amount of hot water dispensed can be accurately detected by counting the number of pulses from the start of hot water dispensing. Further, the flow rate per unit time can also be detected by counting the number of R pulses per unit time using the pulse number ! from the flow rate sensor (7).

Remote control box (C) according to the above IE configuration
Turn on the power switch 021't0111L (this turns on the power lamp), set the desired amount of hot water and the output Ik humidity using the total amount of hot water setting dial QO and the hot water temperature setting dial Oυ. Total amount confirmation lamp - 3 lights o After that, the hot water tap (6) in the hot water supply circuit is fully opened, the normally open water solenoid valve (2) is open, so the flow rate sensor (7)
The water is passed through the water governor (3) and the heat absorption pipe (5), and pulses corresponding to the water flow rate are uniformly sent from the flow rate sensor (7) to the controller (the flow rate per unit time is equal to or higher than the predetermined flow rate). The controller (BJ) determines the number of pulse signals per unit time, issues a command to start the ignition, opens the solenoid valve, sends it to the gas burner (b) used for combustion, and ignites the burner (b). Start point II feed 1 (now to the combustion lamp).

If the burner (5) does not ignite after a predetermined period of time, a non-ignition buzzer will sound. At the same time, hot spring temperature detection 1! (8)
Humidity difference E It, 91 between the detected temperature and the set hot water temperature
1 + By changing the opening degree of (9), the heating capacity of the burner (5) is adjusted to control the outlet temperature to the full set temperature. Then, based on the pulse signal sent from the flow rate sensor (7) to the controller (B), a pulse Witt is generated from the start of hot water dispensing.
Count, the number of pulses is the total amount of hot water setting dial OO
When the number of pulses corresponds to the total amount of hot water dispensed, a command to close the normally open water solenoid valve (2) is issued from the controller (B), and the normally open water solenoid valve (2) is closed. 2) is closed and hot water supply is stopped. At the same time, the controller determines based on the pulse signal from the flow rate sensor (7) that the flow rate has fallen below a predetermined level, issues a command to extinguish the fire, closes the solenoid valve shaft, and stops the gas supply to the burner Q71a. Extinguish the fire.At this point, the buzzer will sound in a different blue color than when the fire does not ignite as described above to notify you that the hot water supply is complete.Then, turn on the hot water tap (8).

After that, when the total hot water output setting dial αOr +] is set to the upper set position (R1), the normally open water solenoid valve (2) is opened, and in this state, hot water can be supplied continuously or intermittently as necessary by manual operation. During hot water supply, the temperature difference 6 between the set humidity of the hot water temperature setting dial 017 and the detected temperature of the hot water temperature detector (8) is input to the controller (controller installed in the hot water bath), and the output signal of the controller is input. By proportionally driving the proportional valve (9) and accurately controlling the hot water temperature to the set temperature as described above, it is possible to discharge hot water at the desired temperature.Here, when the amount of hot water supplied is large, If the ratio L11 degree is too small, a large delay will occur in the control of the ratio L11 degrees, causing fluctuations in the outlet temperature.Therefore, in Figure 1, the flow rate sensor (7
) is converted into an analog quantity by a controller (analog conversion gain), and the analog quantity is sent to the controller (4) along with the electrical signal of the humidity difference.
) and correct the transfer coefficient by changing its magnitude according to the magnitude of the flow rate, making it possible to perform optimal temperature control with less response delay, etc.
4) is first differentiated by a total differentiator (7), and when the differential value exceeds a certain value of eclipse, the output tube of the controller (2) is configured to reach a certain minimum value. It is also possible to prevent a large transient temperature rise due to a sudden decrease in the amount of hot water supplied and a delay in the response of temperature control. Furthermore, it is also possible to perform these in combination.

As explained above, the present invention detects the total amount of hot water supplied by the f-number of the pulse signal of the flow rate sensor installed in the hot water supply circuit of the water heater, so it is not necessary to maintain the flow rate of 1 m per unit time accurately and constant as in the conventional method. Even if the flow rate per unit time is freely changed, that is, even when hot water is supplied at a small flow rate or when hot water is supplied at a large flow rate, the flow rate sensor and controller can accurately detect the total amount of hot water supplied. Water supply pipe (1
) shows an example in which all the water governors (3) are installed, but it is not necessarily possible to install all of them. What's more, it provides pulse notes for the flow rate sensor! ! Since it can be used as an input signal for proportional control of the water heater, appropriate humidity control can be performed without response delay, and hot water can be supplied at a very stable set water temperature. Furthermore, although a case has been described in which a temperature detector is provided and humidity control is performed using a proportional valve, a structure in which humidity control is not necessarily performed may also be used. Furthermore, although the instant water heater has been described, it goes without saying that the present invention can also be applied to a still water heater. The flow rate sensor rotates the water wheel, and the water flow pressure drop required for its drive can be made extremely small, thereby providing a practically effective automatic hot water supply system.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram illustrating an automatic hot water supply system according to the present invention, and FIG. 2 is a block diagram similarly showing the electrical system. (1)... Water supply pipe, (21... Water solenoid valve, (6)...
... Endothermic tube, (7) ... Flow rate sensor, (8) ...
Outlet hot water temperature detector, (9)...proportional valve, α7)...burner, (2))...hot water pipe, ^...supply #h1gl path, (controller...controller., 1 Patent applicant: Paro! Kogyo Co., Ltd. Agent: Patent attorney: Government: Takehiro Male-1 or “1”
=Cgo;,l.

Claims (1)

[Scope of Claims] / A water solenoid valve and a flow rate sensor that converts the water flow rate into a pulse signal are installed in a series of hot water supply circuits in which water supply pipes, heat supply pipes, and hot water supply pipes are connected, and the water flow rate is converted into a pulse signal per unit time. When it senses that the flow rate has exceeded a predetermined flow rate, the burner is ignited, and when it counts the pulse signals and senses that the total number has reached the set total amount of hot water, the water solenoid valve is fully closed and hot water supply is completely stopped. An automatic hot water supply system characterized by extinguishing the burner at the same time as extinguishing the burner. 2 A series of water supplies #h1 connected to water supply pipes, heat absorption pipes, and hot water supply pipes
A water electromagnetic valve, a flow rate sensor that converts the water flow pipe into a pulse signal, and an outlet temperature sensor that detects the outlet temperature are installed on the GI path, and a pulse signal per unit time is used to detect when the flow rate is above a predetermined level. The burner is sensed and ignited, and the proportional valve is actuated by the detection signal of the outlet hot water temperature detector to cause combustion in proportion to the burner input, and the outlet hot water temperature is adjusted to the set temperature, and the pulse signal is counted. An automatic hot water supply system characterized in that the water solenoid valve is closed to stop hot water supply and the burner is extinguished upon sensing that the total amount of hot water has reached a set total amount of hot water. 3. The automatic method according to claim 2, wherein the means for adjusting the hot water temperature to a set temperature is achieved by converting a pulse signal from a flow sensor into an analog signal, and adjusting the opening degree of a proportional valve using the analog signal. Hot water system.