JPH0566062A - Hot water storage type hot water supplying apparatus - Google Patents

Abstract

PURPOSE:To obtain a hot water storage type hot water supplying apparatus in which a hot water supplying pressure can be maintained constant even if a flow rate of hot water is varied and works for piping and wiring can be simplified. CONSTITUTION:The hot water storage type hot water supplying apparatus comprises a motor drive type pressure reduction valve 21 connected to a primary water supply tube l to control a primary water supplying pressure, a flowrate sensor 22 provided in parallel with the valve 21 to detect a flow rate of supplying water, a motor drive type release valve 24 connected to a drain tube 25 to release expansion water, a pressure sensor 28 provided near a water supply port of a tank 3 to detect a water pressure, a system controller 17 for controlling supply water and drain water, a control board 13 for sending an external signal to the controller 17, etc. Accordingly, even if the flow rate of supplying hot water is increased, a secondary water supplying pressure can be maintained constant. Particularly, at the time of supplying a large flow rate of hot water like in the case of a showering, a comfortable showering hot water can be supplied by maintaining the pressure constant, works for piping and wiring are facilitated, and the operability of handling is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage type hot water supply device having an electric pressure reducing valve and an electric relief valve.

[0002]

2. Description of the Related Art Conventionally, there is a hot water storage type water heater of this type having a structure as shown in FIG. As shown in the figure, in the middle of the primary water supply pipe 1, a stopcock 2, a check valve 4 for preventing backflow from the tank 3, a pressure type pressure reducing valve 5 for keeping the secondary water supply pressure constant, and an electric motor for opening and closing. A water supply valve 6 and a flow rate sensor 7 for controlling the amount of water supply are provided, and a relief valve 8 and an air vent valve 9 for releasing the expansion water are provided above the tank 3. In addition, a manual drain plug 11 is provided in the middle of the drain pipe 10 below the tank 3.
And an electric drain valve 12 for opening and closing is attached.
The regulation of the pressure reducing valve 5 and the relief valve 8 is below the normal pressure (1 kg / cm ² ) of the pressure vessel, and the pressure reducing valve 4 is 0.8
To 5 kg / cm ^2, also relief valve 8 is set to 0.97 kg / cm ^2. The system controller 14 connected to the control panel 13 includes an electric water supply valve 6, a flow sensor 7, and an electric drain valve 12.
Is connected to.

[0003]

However, in the above-mentioned conventional structure, since the water stopcock 2 and the drainage tap 11 are not electrically operated, an electrically operated water supply valve is separately provided in order to use them as a HA system for remote control. 6 and the electric drain valve 12 are required, resulting in complicated piping work and high cost.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a hot water storage type water heater which can simplify the peripheral piping and the electric wiring for remote control.

[0005]

In order to achieve the above object, the present invention provides an electric pressure reducing valve which is connected to a primary water supply pipe to control the primary water supply pressure, and a water reducing valve which is installed in parallel with the electric pressure reducing valve. A flow rate sensor that detects the amount, an electric relief valve that is connected to a drain pipe to let the expansion water escape, a pressure sensor that is provided near the water inlet of the tank to detect water pressure, and a controller that controls the water supply and drainage. And a control panel for sending an external signal to the controller, wherein the controller inputs the signals of the flow rate sensor, the pressure sensor and the control panel to control the electric pressure reducing valve and the electric relief valve. is doing.

[0006]

In the above structure, the controller inputs the signals from the flow rate sensor, the pressure sensor and the control panel to control the electric pressure reducing valve and the electric relief valve. Therefore, even if the hot water supply flow rate changes, the secondary water supply pressure Can be constant and the controller can be operated from any position.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. In this embodiment, the same components as those shown in the above-mentioned conventional example are designated by the same reference numerals, and the description thereof will be omitted. A tank 3, a heater 16, a system controller 17, etc. are provided inside the hot water storage type water heater 15. The tank 3 is provided with a hot water supply port 18 at the upper part, and a water supply port 19 and a drain port 20 at the lower part. The water supply pipe is connected to the water supply port 19 from the primary water supply pipe 1 via the check valve 4, the electric pressure reducing valve 21, and the weight reduction sensor 22. An electric relief valve 24 is provided in the middle of the secondary water supply pipe 23, and the expansion water is guided from the drain port 20 to the drain pipe 25 passing through the drain plug 11. The hot water supply pipe 26 is connected from the hot water supply port 18 to the hot water supply tap 27, and a pressure sensor 28 is provided near the hot water supply port 18. The system controller 17 is electrically wired with an electric pressure reducing valve 21, a flow rate sensor 22, an electric relief valve 24, and a pressure sensor 28. Also, from the outside, the control panel 13 is connected to HA.
Connected by the system.

FIG. 2 shows the details of the water supply pipe section. That is, it enters the inside of the valve through the check valve 4 from the primary water supply connection port 30 below the valve body 29. The check valve 4 is lightly pressed from above by the spring 31 and is closed. Electric pressure reducing valve 2
The valve 32 forming 1 has a needle shape, and the valve opening degree can be adjusted by the valve shaft 32a that is horizontally movable by the motor 33. The flow rate sensor 22 has a structure in which an impeller 34 and a magnet 35 are mounted on the shaft of the impeller 34, and a magnetic sensor 36 is provided outside the impeller 34. The pressure-adjusted secondary water supply system-controls a pulse signal generated by rotating the impeller 34. To the container 17.

The secondary water supply connection port 37 at the upper center of the valve element 29 is connected to the water supply port 19 of the tank 3. Further, the valve 38 of the electric relief valve 24 can also adjust the opening degree of the valve 38 by the motor 39 in the horizontal direction.
The expanded water flowing out of the drainage pipe flows from the drainage connection port 40 to the drainage pipe 25.

The operation of the above structure will be described. When the hot water tap 27 is opened and hot water is used, the pressure in the tank 3 drops. In response to this, the pressure sensor 28 instantaneously detects and sends a signal to the system controller 17. System controller 1
The motor 33 is driven immediately from the result of the calculation from 7 to open the valve 32. This operation is repeated until the set secondary pressure is reached.

When the set secondary pressure is reached, the opening degree of the valve 32 is maintained and the equilibrium state is maintained. When the hot-water tap 27 is started to be closed to stop hot water supply, the pressure becomes equal to or higher than the set secondary pressure. Therefore, the signal from the pressure sensor 28 causes the motor 33 to close the valve 32 from the system controller 17. Since the pressure is adjusted in this way, the secondary pressure is constant irrespective of the flow rate as shown by the characteristic shown in FIG.

When the heater 16 is energized to start boiling, the water inside expands and the pressure in the tank 3 gradually rises. Based on the signal detected by the pressure sensor 28, the system controller 17 drives the motor 39 to slightly open the valve 38. Since the pressure increase due to the expansion is slight, the pressure decreases again, and therefore the motor 39 also closes the valve 38 by the controller 17. This is repeated to boil up and the relief valve set pressure has the characteristic shown in FIG. 3b, and the secondary water supply pressure does not change even if the hot water supply flow rate is increased.

Next, the operation of remote control will be described. Initially, the inside of the tank 3 is empty, and at this time, the electric pressure reducing valve 21 is fully closed. For example, if the customer notifies the manager that he will come the next day, the manager will control the control panel 1
3 is operated to start the operation. In response to this signal, the system controller 17 fully closes the electric relief valve 24 and fully opens the electric pressure reducing valve 21 to start water supply to the tank 3. At the same time, the pulse signals from the flow rate sensor 22 are integrated, and when the tank 3 becomes full and the pulse signal stops, it is determined that the tank 3 is full, and the heater 16 is energized to boil up to a predetermined hot water temperature. In this state, wait for the guest to come. When the user returns, he / she informs the manager of the fact and instructs the switch of the control panel 13 to stop the water heater. In response to this signal, the system controller 17 fully opens the electric relief valve 24 and fully closes the electric pressure reducing valve 21 to start draining the tank 3. In this way, when not in use, the inside of the tank 3 is made to be in an empty state and the system is ready for the next visit.

As described above, in the hot water storage type water heater of the embodiment, the electric pressure reducing valve 21 and the electric relief valve 24 can be used both as the electric water supply valve 6 and the electric drainage valve 12, so that the number of valves can be reduced. At the same time, the piping configuration is simplified, and the piping work can be greatly saved.

Further, if only the pressure sensor 28 is provided on the upper portion of the tank 3, a high secondary pressure can be secured, and the electric pressure reducing valve 21 and the electric relief valve 24 can be mounted at arbitrary positions. If it is arranged in the vicinity of the water supply port 19 at the lower part of 3, the pipe distance can be made extremely short, and a simple and rational water supply pipe can be obtained.

Incidentally, if the parts around the water supply such as the check valve 4, the electric pressure reducing valve 21, the electric relief valve 24 are integrated,
Further, the assembly is easy and the practical effect is high, and the electric pressure reducing valve 21 can be completely closed in addition to the pressure adjustment, so that it can be closed by the switch operation from the controller 17 as in the conventional case. It is not necessary to use the stopcock 2.

[0017]

As is apparent from the above embodiments, the hot water storage type water heater of the present invention is connected to the primary water supply pipe to control the maintenance water supply pressure, and the electric pressure reducing valve is installed in parallel with the electric pressure reducing valve. Flow sensor to detect the amount of water supplied, an electric relief valve that connects to the drain pipe to release the expansion water, a pressure sensor that is installed near the water supply port of the tank to detect the water pressure, and a control that controls the water supply and drainage. And a control panel for sending an external signal to the controller, wherein the controller inputs the signals of the flow rate sensor, the pressure sensor and the control panel to control the electric pressure reducing valve and the electric relief valve. With this configuration, the secondary water supply pressure can be kept constant even when the hot water supply flow rate increases, and a comfortable shower hot water supply can be achieved by keeping the pressure constant especially when supplying a large amount of hot water such as in a shower. But Come, easy installation work, such as piping and wiring, thereby improving the operability of the handle.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hot water storage type water heater according to an embodiment of the present invention.

FIG. 2 is a sectional view of the main part of the hot water storage type water heater.

FIG. 3 is an operation characteristic diagram of the hot water storage type water heater.

FIG. 4 is a schematic configuration diagram of a conventional hot water storage type water heater.

[Explanation of symbols]

 1 Primary Water Supply Pipe 3 Tank 13 Control Panel 17 System Controller (Controller) 21 Electric Pressure Reducing Valve 22 Flow Sensor 24 Electric Relief Valve 25 Drain Pipe 28 Pressure Sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenshi Akagawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. An electric pressure reducing valve connected to a primary water supply pipe to control a primary water supply pressure, a flow rate sensor installed in parallel with the electric pressure reducing valve to detect a water supply amount, and connected to a drain pipe to expand. An electric relief valve for escaping water, a pressure sensor for detecting water pressure provided in the vicinity of the water supply port of the tank, a controller for controlling the water supply and drainage, and a control panel for sending an external signal to this controller, The controller is a hot-water storage type water heater that inputs signals from a flow rate sensor, a pressure sensor, and a control panel to control the electric pressure reducing valve and the electric relief valve.