JP2007032955A - Hot-water supply unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent hot water from being fed continuously to avoid a damage from being expanded by an overflow of the water from a bath tub, in electric power interruption or abnormality of an electric circuit during a hot-water supply operation. <P>SOLUTION: This hot-water supply unit is provided with an in-power-interruption closing means 21 for closing a water volume control means 7 to stop the water supply in the power interruption, and a backup electric power source 22 for supplying electric power to the in-power-interruption closing means 21 in the power interruption, the hot-water supply unit conducts automatically a closing operation for the water volume control means 7 to maintain the water volume control means 7 under the closed condition, and the supply of the water is stopped thereby. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hot water supply device with a hot water filling function that automatically closes a hot water supply circuit and stops hot water supply when a hot water tap is opened and a set amount of hot water is supplied to a bathtub or the like. It is about.

  As a hot water supply apparatus that automatically supplies a set amount of hot water, for example, there is an apparatus as shown in FIG. The hot water supply circuit 26 extends through a heat exchanger 27 to a hot water tap 28 disposed in the vicinity of a bathtub (not shown). Further, a flow rate detection means 29, a water amount control means 30 having both a water quantity control function and a water stop function of the hot water supply circuit are inserted upstream of the heat exchanger 27 in the hot water supply circuit 26. Has a function of measuring the total amount of water flowing through the hot water supply circuit 26. The flow rate detection means 29 and the water amount control means 30 are connected to a control circuit 31 and perform a predetermined operation according to the setting state of the operation device 32. In addition, the operating device 32 is provided with a hot water filling switch 33, a hot water amount setting switch 34, and a hot water temperature setting switch 35.

  When filling the bathtub with the hot water supply device, the hot water setting switch 34 sets the hot water temperature with the hot water temperature setting switch 35, operates the hot water filling switch 33, and then opens the hot water tap 28. The gas burner 36 is ignited by the output of 31, and the water supplied while adjusting the amount of water by the water amount control means 30 is heated by the heat exchanger 27 and then supplied from the tap tap 28 to the bathtub.

  On the other hand, the amount of water flowing through the hot water supply circuit 26 is measured by the flow rate detecting means 29. When the measured value becomes equal to the amount of hot water set in the hot water quantity setting switch 33, the gas burner 36 is extinguished and the water quantity control means 30 is maintained in the closed state. Water supply is stopped and the filling operation is completed.

In this case, the hot water filling switch 33 also has a function as a reset switch for forcibly opening the water amount control means 30 after the hot water filling is completed. When the hot water filling switch 33 is operated after the hot water filling is completed, the hot water filling switch 33 is in a closed state. The water amount control means 29 returns to the open state, and the hot water can be continuously taken out from the hot water tap 28 (see, for example, Patent Document 1).
Japanese Patent Publication No. 1-14498 (FIG. 1)

  However, in the above-described conventional configuration, when the hot water supply device is not energized due to a power failure or power supply circuit abnormality during the filling operation by the filling control means, the water amount control means cannot be driven and the filling operation cannot be completed. There was a problem of continuing to supply water and preventing the waste of water and expanding damage caused by overflowing water from the bathtub.

  The present invention solves the above problem, and when the hot water supply device is not energized due to a power failure or power supply circuit failure during hot water filling operation, the hot water supply device automatically closes the water amount control means and the water amount control means An object of the present invention is to maintain the closed state, thereby stopping the supply of water, preventing waste of water, preventing the expansion damage caused by overflowing water from the bathtub, and improving usability.

In order to achieve the above object, the present invention provides a flow rate detection means at a set hot water temperature set by a hot water temperature setting switch after a user operates a hot water filling switch to open a hot water tap and pass water through a hot water supply circuit. The hot water supply operation is continued until the accumulated water amount measured by the above reaches a predetermined target water amount, and when the target water amount is reached, the hot water filling control means for performing the hot water filling operation for stopping the water supply to the hot water supply circuit by the water amount control means. The provided hot water supply apparatus is provided with a power failure closing means for closing the water amount control means to stop water supply in the event of a power failure, and a backup power source for supplying power to the power failure closing means in the event of a power failure.

  According to the above invention, the hot water supply device automatically closes the water amount control means when the hot water supply device is not energized due to a power failure or power supply circuit abnormality during the hot water filling operation, and the water amount control means is maintained in the closed state. Thus, by stopping the supply of water, it is possible to prevent the waste of water and the expansion damage caused by the overflow of water from the bathtub, and improve the usability.

  As described above, according to the hot water supply device of the present invention, water supply to the bathtub can be stopped even when the hot water supply device is not energized due to a power failure or an abnormality in the power supply circuit during hot water filling operation. It is possible to prevent the damage caused by overflow and water overflow from the bathtub, and improve usability.

  Even if the power supply is restored after a power failure and the power is turned on again, the hot water supply circuit is securely closed by the water volume control means. Since the water supply can be stopped, it is possible to prevent the waste of water and the expansion damage caused by the overflow of water from the bathtub, and to improve the usability.

  In addition, it is not necessary to replace the battery of the backup power source, and even if a power failure occurs unexpectedly, the backup power source is not cut off, and the water amount control means can be reliably closed and driven to stop the water supply. .

  According to a first aspect of the present invention, there is provided a flow rate detecting means for detecting a flow rate of water flowing through a hot water supply circuit disposed upstream of a tap tap and calculating a cumulative value of the flow rate, a burner for heating water flowing through the hot water supply circuit, Temperature detection means for detecting the hot water temperature, water volume control means for opening and closing the hot water supply circuit and adjusting the amount of water flowing through the hot water supply circuit, and water supply amount accumulation for calculating the cumulative value of the flow rate of water detected by the flow rate detection means Means, an operation means having a hot water filling switch for instructing hot water filling to the bathtub including opening and closing operations of the water amount control means, a hot water temperature setting switch, and a hot water amount setting switch, and a user operates the hot water filling switch. The hot water supply operation is continued until the accumulated water amount measured by the water supply amount accumulation means reaches the predetermined target water amount at the set hot water temperature set by the hot water temperature setting switch after opening the tap hot water faucet and passing water through the hot water supply circuit, Target water volume In a hot water supply apparatus equipped with a hot water filling control means for performing hot water filling operation to stop the water supply to the hot water supply circuit by the water amount control means when it reaches, it closes at the time of power failure to close the water amount control means and stop the water supply at the time of power failure And a backup power supply that supplies power to the closing means at the time of a power failure during a power failure. The water amount control means is closed and the water amount control means is maintained in the closed state, thereby stopping the supply of water, preventing waste of water and preventing damage caused by overflowing water from the bathtub, and usability. Can be improved.

  The second invention is characterized in that the closing means at the time of power failure does not automatically open the water amount control means at the time of re-energization, and since water supply to the bathtub is stopped at the time of re-energization, It is possible to prevent wastefulness and prevent damage caused by overflowing water from the bathtub, and improve usability.

The third invention is characterized in that the backup power source is provided with a commercial power charging means that is charged from the commercial power source and provided in the event of a power failure. Even if this occurs, the backup power supply is not cut off, and the water amount control means can be reliably closed and driven to stop the supply of water.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is an overall configuration diagram according to a first embodiment of the present invention.

  1 is a hot water tap, 2 is a hot water supply circuit comprising a hot water supply pipe 3, a heat exchanger 4 and a water supply pipe 5 disposed upstream of the hot water tap 1 and 6 is connected to the hot water supply circuit 2 and flows through the hot water supply circuit 2. A flow rate detecting means for measuring the amount of water, 7 is a water amount control means for adjusting the amount of water flowing through the hot water supply circuit while opening and closing the hot water supply circuit, 8 is a burner for heating the heat exchanger, and 9 is for setting the operation switch 10 and a predetermined amount of hot water. A remote control device 14 includes a hot water setting switch 11, a hot water temperature setting switch 12 for setting a predetermined hot water temperature, and a hot water filling switch 13, and 14 supplies fuel to be supplied to the burner 9 according to the set temperature and installation temperature of the remote control device 9. Fuel control device to be controlled, 15 is a fuel valve, 16 is a blower for supplying combustion air, 17 is an incoming water temperature detecting device for detecting the incoming water temperature, 18 is a hot water temperature detecting device for detecting the hot water temperature, and 19 is the entire hot water supply device. of The controller that controls the CPU, RAM, and ROM that make up the theoretical calculation circuit (not shown), the input unit that accepts input signals from various sensors and control devices, the calculation unit that calculates the input from the input unit, and the drive signals to the various actuators It is comprised by the output part which outputs.

  A hot water filling control device 20 built in the controller 19 outputs a forced fire extinguishing signal for forcibly extinguishing the burner 9 and a hot water supply stop signal for closing the water amount control means 7 to control a predetermined hot water filling operation. is there. Reference numeral 21 denotes a power failure closing means for closing the water amount control means to stop water supply in the event of a power failure, and 22 is a backup power source that supplies power to the power failure closing means 21 in the event of a power failure. Reference numeral 23 denotes an ignition device for igniting the burner 8, and reference numeral 24 denotes flame detection means for detecting the ignition of the burner.

  In the above configuration, the hot water filling operation will be described.

  In order for the user to fill the tub with water, the amount and temperature of hot water to be put in the tub are set in advance using the hot water amount setting switch 11 and the hot water temperature setting switch 12 in the remote control device 9. Since the amount and temperature of the hot water are stored in the remote control device 9, when used under the same conditions, once set, there is no need to set from the next time.

  Next, when the hot water tap 1 of the bathroom is opened, water flows into the hot water supply circuit 2 and the flow rate detecting means 6 is turned “ON”, and the controller 19 performs an initial check of each actuator of the hot water supply device and ignites and rotates the blower 16. Rotate by number.

  When the blower 16 starts rotating, the ignition device 23 is turned “ON” and a continuous spark discharge starts. At the same time, the fuel valve 15 that opens and closes the fuel circuit supplied to the burner 8 is opened to supply the gas amount necessary for ignition. In such a manner, the fuel control device 14 is opened and gas is supplied to the burner 8 for ignition.

  Thereafter, the fuel control device 14 adjusts the fuel so that the hot water temperature detected by the hot water temperature detection device 18 becomes the temperature set by the hot water temperature setting switch 12.

When the flame detection means 24 determines that the burner is normally ignited and burns well, the blower 16 appropriately adjusts the air volume so that the fuel burned by the burner 8 burns well.

  Thereafter, if the amount of hot water set by the hot water amount setting switch 11 and the amount of water measured by the flow rate detection means 6 are equal, a forced fire extinguishing signal is output from the hot water filling control device 20, the fuel control device 14 and the fuel valve 15 are closed, and the fuel is discharged. Since the supply is stopped, the burner 8 is extinguished.

  At the same time, a notification signal is output from the hot water filling control device 20, and the remote control device 9 sounds a notification sound to notify the completion of the hot water filling.

  When the hot water supply device is not energized due to a power failure or an abnormality in the power supply circuit during the hot water filling operation, the controller 19 stops, the fuel control device 14 and the fuel valve 15 are closed, and the fuel supply is stopped. Extinguish the fire. On the other hand, the power supply to the power failure closing means 21 for closing the water amount control means 7 at the time of a power failure is immediately switched from the commercial power supply to the backup power supply 22 at the same time as the power failure occurs, and the power loss closing means 21 is automatically switched by the power failure control means 7. Is closed and the water amount control means 7 is maintained in the closed state, thereby stopping the supply of water.

  As described above, even when the hot water supply device is not energized due to a power failure or power supply circuit failure during hot water filling operation, water supply to the bathtub can be stopped, preventing water waste and overflowing from the bathtub. It can prevent the damage caused by the expansion and improve usability.

(Embodiment 2)
In the second embodiment, in addition to the first embodiment described above, a control that does not automatically open the water amount control means 7 at the time of re-energization is added to the closing means 21 at the time of power failure. Since the supply of water to the tub is stopped, it is possible to prevent the waste of water and to prevent the expansion damage caused by the overflow of water from the bathtub, and to improve the usability.

(Embodiment 3)
The third embodiment is characterized in that, in addition to the first and second embodiments described above, the backup power source 22 is provided with a commercial power charging means 25 that is charged from a commercial power source and provided in the event of a power failure. The battery replacement of the backup power source is unnecessary, and even if a power failure occurs unexpectedly, the backup power source is not cut off, and the water amount control means can be reliably closed and driven to stop the supply of water.

  The hot water supply device of the present invention can stop the water supply to the bathtub even when the hot water supply device is not energized due to a power failure or an abnormality in the power supply circuit during hot water filling operation. It can prevent expansion damage due to overflow, and can be applied to all automatic hot water filling devices using a power source.

Overall configuration diagram in the first embodiment of the present invention Overall configuration diagram of the third embodiment of the present invention Configuration diagram of conventional hot water supply equipment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water tap 2 Hot water supply circuit 6 Flow rate detection means 7 Water quantity control means 9 Remote control device 11 Hot water quantity setting switch 12 Hot water temperature setting switch 13 Hot water filling switch 14 Fuel control device 15 Fuel valve 19 Controller 20 Hot water filling control device 21 Closing means at power failure 22 Backup power supply 25 Commercial power charging means

Claims (3)

A flow rate detecting means for detecting a flow rate of water flowing through a hot water supply circuit disposed upstream of the tap hot water tap and calculating a cumulative value of the flow rate, a burner for heating water flowing through the hot water supply circuit, and a heated hot water temperature A temperature detecting means for detecting; a water amount control means for adjusting the amount of water flowing through the hot water supply circuit while opening and closing the hot water supply circuit; and a hot water filling for instructing filling of the bathtub including opening and closing operations of the water amount control means An operating means having a switch, a hot water temperature setting switch and a hot water volume setting switch, and a user operates the hot water filling switch to open the hot water tap and pass it through the hot water supply circuit. The hot water supply operation is continued until the accumulated water amount measured by the flow rate detection means reaches a predetermined target water amount at the set hot water temperature, and when the target water amount is reached, the water amount control means supplies the hot water supply circuit to the hot water supply circuit. A hot water filling control means for performing a hot water filling operation to stop water, and supplies power to the power failure closing means to close the water amount control means to stop water supply in the event of a power failure, and to supply the power to the power failure closing means in the event of a power failure A hot water supply apparatus comprising a backup power source. The hot water supply apparatus according to claim 1, wherein the closing means at the time of power failure does not automatically open the water amount control means at the time of re-energization. 2. The hot water supply apparatus according to claim 1, wherein the backup power source is provided with a commercial power charging means that is charged from the commercial power source and provided in the event of a power failure.