JPS61114031A - Controlling device for hot water supplier - Google Patents

Abstract

PURPOSE:To enable to control a hot water supplier by only one water-rate controller, by constituting the water supplier in such a manner that the water rate at a moment and an integrated value are determined from the detected rate of feed water, each value is compared with respective set value, and controller controls the water rate by the results, in a controller for a hot water supplier with a water-rate controlling device. CONSTITUTION:When the rate of feed water is detected by water-rate detector 2 and a data is fed into a feed hot water controller 28, the water rate at a moment is calculated in a momentary water-rate processor 28e, while an integrated water rate is calculated in an integrated water-rate processor 28f, respectively. The momen tary water-rate processor 28e compares the processed momentary water rate with a momentary water-rate setting value 28b corrected by a momentary wter-rate correc tor 28d. Based on the result, a water-rate controller 7 provided to one of hot-water feed pipes on the side of the outlet of a heat exchanger 6 is regulated by the intermedi ary of a driving unit 19, controlling the momentary rate. Water is stopped when the integrated water rate 28f reaches the set integrated water rate 28d. With such an arrangement, the water rate can be controlled by only one controlling device, and large quantity of hot water can be supplied even the feed water is under low pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water supply control device for a water heater equipped with a water flow rate control device.

BACKGROUND OF THE INVENTION 2. Description of the Related Art It is known from Japanese Patent Laid-Open No. 58-217149 to detect the instantaneous value of the water supply amount and to control the water supply amount of the water heater using a water flow controller. In addition, calculating the cumulative amount of water supply and stopping the water supply using a water flow switch was disclosed in Japanese Patent Laid-Open No. 57-12.
This method is known from Japanese Patent No. 7741.

Problems to be Solved by the Invention This central water heater is capable of supplying hot water to multiple locations simultaneously using one water heater, and detects the instantaneous value of the amount of water supplied and controls the amount of water supplied to the water heater using a water flow controller. In order to control the amount of water supplied, calculate the integrated value of the water supply amount, and use the water flow switch to stop the water supply to one of the preliminary water supply channels, two water flow valves are required: a water flow controller and a water flow switch, which is expensive. This has the disadvantage of becoming.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a hot water supply control device that can control water volume and start/stop water supply using two water flow controllers, and can supply a large amount of water even when the water pressure is low. shall be.

Means for Solving the Problems The present invention provides a water flow rate detector for detecting the flow rate of water supplied to a water heater, a water supply controller that receives a signal from the water flow rate detector as input and calculates an instantaneous value or an integrated value of water flow rate, and a water flow rate detector. A heat exchanger connected to the heat exchanger, a heating device of this heat exchanger, a water flow controller installed in one of the branched hot water pipes on the outlet side of the heat exchanger, and a water flow rate detector are used to measure the water flow based on the instantaneous value of the water flow sensor. It has a drive device for a water flow controller that continuously controls the water flow and opens and closes the water flow based on the integrated water flow value.

Function In the above configuration, the water amount detector detects the amount of water supplied to the water heater, and the signal is sent to the hot water controller.
The instantaneous value and integrated value of water volume are calculated manually.

The set instantaneous amount of water is compared with the instantaneous value of the water amount detector, and the instantaneous amount of water is determined by operating the drive device and adjusting the water amount controller installed in one of the hot water pipes installed on the outlet side of the heat exchanger. Control. Further, when the integrated value of the water amount detector reaches the set integrated amount of water, the drive device is operated and the water amount controller closes the water amount.

Embodiment An embodiment in which the present invention is applied to a gas instantaneous water heater will be described.

In Figure 1, reference numeral 1 denotes a water inlet block where water flows in from the bottom of Figure 1, causing the water wheel 3 of the water amount detector 2 to rotate, and the rotation detection element 4 to measure the number of rotations.

Reference numeral 5 denotes a known governor that roughly controls the amount of water, and roughly regulates the amount of water by deforming the rubber caused by the pressure drop that occurs during water flow. , the water flow is divided into two directions from the governor 5, one is heated by the heat exchanger 6 and flows into the water flow controller 70 inlet channel 8, and the other flows from the bypass path 9 into the bypass inlet channel 10 of the water flow controller 7. . Water flow controller 7
The heated water in the inlet channel 8 and the unheated water that has passed through the bypass control valve 11 from the bypass inlet channel 10 are mixed in a mixing chamber 12, and the temperature thereof is detected by an outlet hot water temperature detector 13. The water supply channel branches from the mixing chamber 12 into two, one passing through the gap between the main control valve 14 and the main control hole 15 and connected to the first water heater 16, and the other communicating with the second water supply pipe 17. .

The main control valve 14 has a valve seat 1 made of an elastic material such as rubber.
8, which corresponds to the protrusion 15a of the main control hole 15 and can be closed. Reference numeral 19 denotes a drive device, which includes a motor 20, a gear 21, and an output shaft 22, and the output shaft 22 is engaged with a valve stem 23. The valve stem 23 has a thread 23a and a groove 23b, and the output shaft 22 engages with the groove 23b to rotate the valve stem 23, and this rotational movement is turned into a linear movement by the screw 23a to operate the main control valve 14. . The main control valve 14 is always urged upward in FIG. 1 by the force of water pressure, and comes into contact with the lower end of the valve stem 2a and moves as one. A spring 24 urges the bypass control valve 11 downward.

The amount of gas is controlled by a heating controller 26 from the gas supply path 2°5, and the gas is supplied to a heating device 27 where it is combusted and heats the heat exchanger 6. Reference numeral 28 denotes a hot water supply controller composed of a microprocessor or the like, which inputs signals from the water amount detector 2 and the hot water temperature detector 13 and outputs them to the heating controller 26 and the drive device 19.

Next, an overview of the operation will be explained. In FIG. 1, when the power is turned on and water flow starts, a signal from the water amount detector 2 is read, fuel is supplied to the heating device 27, and combustion starts. Then, the temperature of the mixed hot water heated by the heat exchanger 6 and the water passed through the bypass path 9 is detected by the hot water temperature detector 13, and the heating controller 26 is driven to control the heating amount of the heating device 27. Further, the amount of water supplied is roughly regulated by the governor 5, and more precisely, a drive device 19 is driven by a signal from the water amount detector 2 and controlled by the main control valve 14.

Next, the control operation will be explained in more detail with reference to FIG.

When the power is turned on, the user sets the hot water temperature, instantaneous water amount, and cumulative water amount using the hot water temperature setting device 28a, instantaneous water amount setting device 28b, and cumulative water amount setting device 28c in the hot water supply controller 28, respectively. The cumulative amount of water is used when hot water is supplied through the first hot water supply pipe 16, and is convenient for supplying hot water to a bath at home.

After that, when water flow is started, the water amount detector 2 detects the amount of water supplied, supplies fuel to the heating device 27, performs ignition operation, and starts combustion in the heating device 27.

The instantaneous amount of water is determined by the driving device 19 by comparing the signal of the instantaneous water amount correction section 28d that corrects the signal of the instantaneous water amount setting device 28b with the signal of the instantaneous water amount calculation section 28 that calculates the instantaneous amount of water from the signal of the water amount detector 2. is driven, and the main control valve 14 is operated via the valve stem 23 to control the amount of water. The main control valve 14 of the water amount controller 7 controls the amount of water in the first hot water supply pipe 16, and the bypass control valve 11 controls the division ratio between the heat exchanger 6 and the bypass path 9.

The heating amount of the heating device 27 is adjusted by the heating controller 26. The heating controller 26 calculates the deviation between the hot water temperature setting device 28a and the hot water temperature detector 13 using the hot water temperature control calculation section 28, for example, by PID control! Heating controller 2
6 to keep the hot water temperature equal to the setting.

If the amount of water set by the instantaneous water amount setting device 28b is too large and becomes a load that exceeds the heating capacity of the heating device 27, and the hot water temperature drops from the set value, the hot water tap temperature setting device 28a
The hot water temperature is decreasing due to the deviation of the hot water temperature detector 13, and the heating controller 26 of the hot water temperature control calculation unit 28f.
Instantaneous water amount correction unit 2 determines that the output to is fully open.
8d, the signal of the instantaneous water amount setting device 28b is corrected to a smaller value.

As a result, the instantaneous amount of water decreases, the load becomes within the heating capacity line, and the hot water temperature becomes equal to the set value.

Hot water is supplied according to the hot water temperature and instantaneous water amount set in this way, and the integrated water amount setting device 28g integrates the signal of the water amount detector 2. When the signal from the water amount detector 2 matches the value set by the integrated water amount setting device 213a, the driving device 19 is driven to operate the main control valve 14 of the water flow controller 1 via the valve stem 23, press the valve outlet 18 against the protrusion 15a of the main control hole 16, and stop the hot water supply to the first hot water supply pipe 16. . At this time, the second hot water pipe 17
can be used regardless of whether the first water supply pipe 16 is opened or closed. At home, the first hot water pipe 1
It is convenient to connect 6 to the bath and the second hot water pipe 17 to the washroom or kitchen.

Effects of the Invention As described above, the present invention provides a water flow controller in one of the water supply pipes branched at the outlet side of the heat exchanger, and operates the water flow controller based on the instantaneous value of the water flow detector to continuously control the water flow. At the same time, the water flow controller is operated based on the integrated value of the water flow detector to open and close the water flow, so even if hot water supply is automatically stopped, hot water can still be supplied using other hot water supply pipes. Since water flow control and water flow opening/closing can be performed with a single water flow controller, a smaller size and lower cost can be achieved. Furthermore, since a bypass control valve is provided which is linked to the main control valve of the water flow rate controller, it is possible to supply a large amount of hot water even at low water pressure.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a hot water supply control device showing an embodiment of the present invention, and FIG. 2 is a block diagram showing control signals of the same device. 2...Water amount detector, 6...Heat exchanger,
7...Water flow controller, 9...Bypass path, 11...Bypass control valve, 14...
Main control valve, 16...First hot water pipe, 17...
...Second hot water pipe, 19...Drive device, 27...
... Heating device, 28 ... Hot water controller.

Claims (3)

[Claims] (1) A water flow rate detector that detects the water flow rate, a hot water supply controller that calculates a signal from this water flow rate detection path, a heat exchanger that is connected to the water flow rate detector, a heating device for this heat exchanger, and the A hot water supply control device having a water flow rate controller installed in one of the branched hot water supply pipes on the exit side of a heat exchanger, and a drive device for the water flow rate controller that continuously controls the water flow rate and opens and closes the water flow rate. (2) The hot water supply control device according to claim 1, wherein the hot water supply controller calculates an instantaneous value and an integrated value of the water amount based on a signal from the water amount detector, and controls the water amount with the water amount controller and opens/closes the water amount. (3) The water flow controller has a main control valve that controls the water flow of one of the branched hot water pipes, and a bypass control valve that controls the water flow of the bypass path that bypasses the heat exchanger. The hot water supply control device according to item 1.