JPH0255688B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to water flow control in a water heater.

Conventional technology Detecting the instantaneous value of the water supply amount and controlling the water supply amount of the water heater using a water flow controller is disclosed in Japanese Patent Application Laid-Open No. 58-217149.
It is known in the publication No. Further, it is known in Japanese Patent Application Laid-Open No. 127741/1983 to calculate the integrated value of the amount of water supplied and to stop the water supply using a water amount switch.

Problems to be solved by the invention A central water heater that can simultaneously supply water to multiple locations with one water heater, detects the instantaneous value of the amount of water supplied and controls the amount of water supplied to the water heater with a water flow controller. In order to control the flow rate and to calculate the integrated value of the water supply amount and to stop the water supply to one of the multiple tap hot water supply paths using the water flow switch, the water flow controller and the water flow switch must be operated respectively. The disadvantage is that two drives are required and are expensive.

Means for Solving the Problems The present invention provides a water flow rate detector that detects the water flow rate, a hot water supply controller that calculates a signal from the water flow rate detector, a water flow controller installed in a water supply channel, and a branched water supply system. A water flow switch provided on one of the channels, a driving device that operates the water flow controller and the water flow switch, and the water flow switch is operated to open and close based on the integrated value of the water flow detector. a water volume opening/closing mechanism; and a water volume that continuously controls the total water volume of the water supply channel by operating the water volume controller based on the instantaneous value of the water volume detector while keeping the water volume switch open or closed. It has a control mechanism.

Effects In the present invention, a water amount detector detects the total amount of water supplied to a water heater, and the signal is input to a hot water supply controller, and an instantaneous value and an integrated value of the water amount are calculated. The set instantaneous amount of water is compared with the instantaneous value of the water amount detector, and the instantaneous amount of water is controlled by operating the drive device and adjusting the water amount controller via the water amount control mechanism. Further, when the integrated value of the water amount detector reaches the set integrated amount of water, the drive device is operated to close the water amount with the water amount switch via the water amount opening/closing mechanism.

Embodiment An embodiment in which the present invention is applied to a gas instantaneous water heater will be described. In FIG. 1, reference numeral 1 denotes a water amount detector, in which water flows in from an inlet channel 2, rotates a water wheel 3, and uses a rotation detecting element 4 to measure the number of rotations. 5
is a water flow controller in which water flow from a water flow detector 1 enters an inlet valve chamber 6, passes through a gap between a main control valve 7 and a main control hole 8, and flows into an outlet valve chamber 9. Water flow is at outlet valve chamber 9
The water is divided into two directions, one flowing into the heat exchanger 10 and the other flowing into the bypass passage 13 through the gap between the bypass control valve 11 and the bypass control hole 12, and merging with the outlet pipe 14 of the heat exchanger 10. . 15 is a water flow switch, and the water flow from the hot water outlet pipe 14 is directed to the first hot water outlet pipe 1.
6 and a second hot water outlet pipe 17, and the first hot water outlet pipe 16
includes a diaphragm on-off valve 18 and an on-off valve seat 19. A back pressure chamber 20 of the diaphragm on-off valve 18 communicates with the inlet side of the on-off valve through a communication hole 21, and a through hole 22 is provided in the center of the diaphragm on-off valve 18 and communicates with the outlet side of the on-off valve. . 23 is a hot water temperature detector. 24 is a drive device and motor 2
5, consisting of a gear 26, an output shaft 27, and an angle detector 28 for the output shaft 27, the water flow control mechanism 29 controls the water flow controller 5, and the water flow opening/closing mechanism 30 controls the water flow switch 1.
Open and close 5. The water flow control mechanism 29 is composed of a cam 31 and a valve shaft 32, and controls the main control valve 7 and the bypass control valve 11 by the rotation of an output shaft 27. The rotation of the output shaft 27 causes the water flow switch 15 to
The pilot valve 36 in the back pressure chamber 20 is operated via a spring 37. When the pilot valve 36 is moved downward by the force of the spring 37, it closes the through hole 22, and as a result, the diaphragm chamber 2
The zero pressure increases and the diaphragm on-off valve 18 closes. FIG. 2 shows the holding mechanism 34, which is used in a push switch that turns on and off. When you push in the direction of the arrow, the stopper 40 moves to A.
→ B → C and stops, so the sliding body 38 is held in the downwardly pushed position. When the sliding body 38 is pushed again, the stopper 40 moves from C → D → A, and the sliding body 38 returns to its original position. It returns to the position.

The amount of gas is adjusted by a heating controller 42 from a gas supply path 41 and is supplied to a heating device 43 where it is combusted and heats the heat exchanger 10 . 44 is a water heater controller consisting of a microprocessor, etc.;
The signal from the hot water temperature sensor 23 is inputted and outputted to the heating controller 42 and the drive device 24.

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 1 is read, fuel is supplied to the heating device 43, and combustion starts. and heat exchanger 8
The temperature of the mixed hot water of the heated hot water and the water passing through the bypass passage 13 is detected by the outlet temperature detector 23, and the heating controller 42 is driven to control the heating amount of the heating device 43. Further, the amount of water supplied is controlled by driving a drive device 24 based on a signal from the water amount detector 1.

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 44a, instantaneous water amount setting device 44b, and cumulative water amount setting device 44c in the hot water supply controller 44, respectively. After that, when water flow is started, the water amount detector 1 detects the amount of water supplied, fuel is supplied to the heating device 43, and ignition operation is performed to start combustion in the heating device 43. The instantaneous water amount is determined by a signal from an instantaneous water amount correction section 44d that corrects the signal from the instantaneous water amount setting device 44b, and a water amount detector 1.
An instantaneous water amount calculation unit 4 that calculates the instantaneous water amount from the signal of
The drive device 24 is driven by the comparison with the signal 4e, and the water amount controller 5 is operated and controlled via the water amount control mechanism 29. Main control valve 7 of water flow controller 5
In this case, the total amount of water supplied before being divided into the heat exchanger 10 and the bypass path 13 is controlled, and the bypass control valve 11 controls the ratio of the divided water flow between the heat exchanger 10 and the bypass path 13.

The heating amount of heating device 43 is adjusted by heating controller 42 . The heating controller 42 calculates the deviation between the hot water temperature setting device 44a and the hot water temperature detector 23 using a hot water temperature control calculation unit 44f, and controls the heating controller 42 by, for example, PID control to make the hot water temperature equal to the setting. keep.

If the amount of water set by the instantaneous water amount setting device 44b is too large and becomes negative higher than the heating capacity of the heating device 43, and the hot water temperature decreases with respect to the set value,
It is determined that the hot water temperature has decreased due to the deviation between the hot water temperature setting device 44a and the hot water temperature detector 23, and that the output of the hot water temperature control calculation unit 44f to the heating controller 42 is fully open. The water amount correction section 44d corrects the signal from the instantaneous water amount setting device 44b to a smaller value.
As a result, the instantaneous amount of water decreases, the load becomes within the heating capacity, 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 calculating section 44g integrates the signal of the water amount detector 1. If the signal matches the value set by the integrated water amount setting device 44c, the driving device 2
4 is driven, and the water amount switch 15 is operated via the water amount opening/closing mechanism 30. That is, the valve shaft 35 moves downward, increasing the bias of the spring 37, closing the diaphragm on-off valve 18, and stopping the supply of hot water to the first hot water outlet pipe. The drive device 24 immediately returns to its original position after closing the water flow switch 15, and if hot water is being supplied to the second hot water outlet pipe 17, it controls the instantaneous water flow again based on the signal from the instantaneous water flow calculation unit 44e. do. At this time, the water volume switch 15 is connected to the water volume switch mechanism 30.
Even if the valve moves, the valve is kept closed by the action of the holding mechanism 34. When the cumulative water amount setting device 44c is reset, the drive device 24 is driven and the water amount opening/closing mechanism 30 is activated.
The holding mechanism 34 is pushed again through the holding mechanism 3
4 is released from its holding and returns upward, and the water flow switch 15 opens again.

Effects of the Invention As described above, the present invention provides a water flow opening/closing mechanism that operates and closes a water flow switch provided in a water supply channel branched based on the integrated value of a water flow detector, and a water flow switch that opens or closes the water flow switch. The water flow control mechanism, which continuously controls the total water flow in the water supply channel by operating the water flow controller based on the instantaneous value of the water flow detector while maintaining the flow rate, was driven by a single drive device. A total water supply amount equal to the set value is achieved in a small size and at a low cost regardless of whether the water supply channel is opened or closed. Further, since the water flow opening/closing mechanism is provided with a holding mechanism, the water flow controller can be controlled immediately after the water flow switch is opened/closed, which is of high practical value.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts showing the configuration of a hot water supply control device according to an embodiment of the present invention, FIG. 2 is a cutaway perspective view of the main parts showing the holding mechanism of the device, and FIG. FIG. 3 is a block diagram showing control signals. 1...Water amount detector, 5...Water amount controller, 7...
Main control valve, 10... Heat exchanger, 11... Bypass control valve, 15... Water flow switch, 24... Drive device, 29... Water flow control mechanism, 30... Water flow opening/closing mechanism, 34... Holding mechanism , 43... heating device, 44
...Water supply controller, 44b...Instantaneous water amount setting device, 4
4c...Accumulated water amount setting device.

Claims (1)

[Scope of Claims] 1. A water flow rate detector that detects the water flow rate, a hot water supply controller that calculates a signal from the water flow rate detector, a water flow rate controller installed in the water supply channel, and a water flow rate controller installed in one of the branched water supply channels. a water flow switch provided, one drive device that operates the water flow controller and the water flow switch;
a water flow opening/closing mechanism that operates the water flow switch to open and close it based on the integrated value of the water flow sensor; A water supply control device comprising: a water flow control mechanism that continuously controls the total water flow of the water supply channel by operating a water flow controller. 2. The hot water supply controller has an instantaneous water flow setting device and an integrated water flow setting device that respectively set the instantaneous value and integrated value of the water flow, and usually a comparison signal between the instantaneous value of the instantaneous water flow setting device and the water flow detector is generated. Operate the water flow controller with
2. The hot water supply control device according to claim 1, wherein the water flow switch is operated when the integration setting device is set or when the integration value reaches the value of the integration setting device. 3. A water flow rate detector that detects the water flow rate, a hot water supply controller that calculates the signal of this water flow rate detector, a water flow rate controller installed in the water supply channel, a heat exchanger connected to this water flow rate controller, and a heating device of a heat exchanger, a water flow switch provided in one of the branched water supply channels on the exit side of the heat exchanger, a drive device for operating the water flow controller and the water flow switch, and the water flow a water flow opening/closing mechanism that operates the water flow switch to open and close the water flow based on the integrated value of the detector; A water supply control device comprising: a water flow control mechanism that continuously controls the total water flow of the water supply channel by operating a water flow controller. 4. The hot water supply control device according to claim 3, wherein the water flow controller includes a main control valve that controls the total amount of water, and a bypass control valve that controls the amount of water that bypasses the heat exchanger.