JP4487732B2 - Water heater - Google Patents

Description

  The present invention relates to a hot water supply apparatus.

Conventionally, this type of hot water supply device has a water leakage sensor installed below the hot water storage tank that stores hot water, and when water leakage is detected by the water leakage sensor, the automatic water supply valve is closed by the control means, etc. The supply of hot water to the outside accompanying the water supply to can be automatically stopped (see, for example, Patent Document 1).
JP-A-5-157351

  However, in the conventional configuration, water leakage from the hot water storage tank or from the vicinity of the hot water storage tank can be detected, but water leakage from the hot water storage tank to the terminal cannot be detected.

  This invention solves the said conventional subject, and it aims at providing the hot water supply apparatus which can detect the water leak from the exit side of a feed water flow rate detector to the inlet side of a hot water flow rate detector.

  In order to solve the above-described conventional problems, a hot water supply apparatus of the present invention includes a water supply flow rate detector that detects a flow rate of a water supply from a water supply source, a hot water flow rate detector that detects a flow rate of hot water supplied to a terminal, and a hot water supply to a terminal. The controller includes a pouring solenoid valve for adjusting the flow rate, and a controller. The controller includes a flow rate detected by the hot water supply flow rate detector and a flow rate detected by the hot water flow rate detector. When the difference is equal to or greater than a predetermined value, it is determined that water leakage has occurred between the outlet side of the feed water flow rate detector and the inlet side of the hot water flow rate detector.

  This makes it possible to detect water leakage from the outlet side of the feed water flow rate detector to the inlet side of the hot water flow rate detector.

  The hot water supply apparatus of the present invention can detect water leakage in a pipe from the outlet side of the water supply flow rate detector to the inlet side of the hot water supply flow rate detector.

A first aspect of the invention is a hot water storage tank, a water supply flow rate detector for detecting a water supply flow rate from a water supply source , a shutoff valve for shutting off water supply from the water supply source to the hot water storage tank, and a hot water supply flow rate from the hot water storage tank to the terminal. A hot water supply flow rate detector for detecting the hot water supply flow rate from the hot water storage tank to the bath , a bath flow rate detector on the outlet side of the hot water supply solenoid valve, and a controller. The container first confirms whether the pouring solenoid valve is in a closed state, and when the flow rate is detected by the bath flow detector even though the pouring solenoid valve is in a closed state, The shut-off valve is closed, and the pouring solenoid valve is closed, the bath flow rate detector does not detect the flow rate, the hot water supply flow rate detector does not detect the flow rate, and the water supply When the flow rate detector detects the flow rate, It determines that the leakage from the outlet side of the vessel between to the inlet side of the hot water flow detector has occurred, in which closing said shut-off valve. Thereby, it is possible to leak detection from the outlet side of the feed water flow detector to the inlet side of the hot water flow detector, also that Do detectable especially leaky bath flow detector.

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

(Embodiment 1)
FIG. 1 shows a hot water supply apparatus according to a first embodiment of the present invention.

  In FIG. 1, a hot water storage tank 3 is housed in the hot water supply device 2, and water supplied from a water supply source for supplying city water or the like passes through a shutoff valve 7 that shuts off the water supply and is decompressed by a pressure reducing valve 4. Later, water is supplied to the hot water storage tank 3.

  Further, a water supply flow rate detector 5 for detecting the water supply flow rate of the water supply depressurized by the pressure reducing valve 4 is provided, and the water supply supplied from the water supply source is branched from the outlet side of the water supply flow rate detector 5, and one is supplied to the hot water storage tank 3. The other flows to the hot water mixing valve 10.

  The hot water mixing valve 10 mixes hot water supplied from the hot water storage tank 3 and the water supplied from the water supply source, adjusts the temperature of the hot water supplied to the terminal (kitchen, washroom, shower, etc.), and then mixes the hot water. Hot water is supplied through the valve 1. In the hot water mixing valve 1, the hot water supplied from the water supply source and the hot water from the hot water mixing valve 10 are mixed to adjust the hot water temperature.

  Also in the bath mixing valve 13, hot water supplied from the hot water storage tank 3 and water supplied from a water supply source are mixed, and the hot water obtained by mixing is a bath water temperature detector 14 for detecting the bath water temperature and pouring water. Hot water is supplied to the terminal (bath) through the electromagnetic valve 15.

  The temperature adjustment of the hot water generated by the hot water supply mixing valve 10 and the bath mixing valve 13 can be set by the operation unit 17. The hot water temperature set by the operation unit 17 is transmitted to the controller 16, and the controller 16 controls the mixing ratio of hot water and water in the hot water supply mixing valve 10 and the bath mixing valve 13.

  Also, a hot water temperature detector 11 and a hot water flow rate detector 12 for detecting hot water temperature are provided on the outlet side of the hot water mixing valve 10, and the terminal (kitchen, washroom, shower, etc.) is provided via the hot water outlet joint valve 1. The instantaneous flow rate at the time of hot water supply is detected by the hot water supply flow rate detector 11.

  In the embodiment configured as described above, the operation and action will be described below with reference to the flowchart shown in FIG.

  First, the controller 16 confirms that the pouring electromagnetic valve 15 is closed (step 201). Next, the flow rate detected by the feed water flow rate detector 5 is confirmed (step 202), and when the flow rate is not detected, the shutoff valve 7 is controlled to shut off the feed water from the feed water source (step 203). When the flow rate is detected (that is, when the detection signal of the feed water flow rate detector 5 is greater than 0), the flow rate detected by the hot water supply flow rate detector 12 is confirmed (step 204).

  If the flow rate is not detected by the hot water flow rate detector 12 (that is, when the detection signal of the hot water flow rate detector 12 is 0), it is determined that water leakage has occurred on the outlet side of the hot water flow rate detector 5; An alarm sound is emitted from the operation unit 17 and the shutoff valve 7 is closed (step 205).

  If the flow rate is detected by the hot water supply flow rate detector 12, the flow rate detected by the hot water supply flow rate detector 5 is compared with the flow rate detected by the hot water supply flow rate detector 12 (step 206).

  As a result of the comparison, when both flow rates are substantially equal, it is determined that hot water is being supplied (step 207).

  If the flow rates are not substantially equal, it is determined that there is water leakage, and an alarm sound is emitted from the operation unit 17 to close the shutoff valve 7 (step 208). The time when the two flow rates are not recognized as being substantially equal is when the flow rate difference between the water supply flow rate and the hot water supply flow rate is greater than or equal to a predetermined value (for example, 1 L / min). Is equal to or less than a predetermined value (for example, 1 L / min), both flow rates are considered equal. When the flow rate difference is less than or equal to the predetermined value, the hot water is being supplied to the user via the hot water mixing valve 1, so that an error that water leakage has occurred is set by setting an appropriate predetermined value. Judgment can be prevented.

  As described above, according to the first embodiment, it is possible to detect water leakage in the pipe from the outlet side of the water supply flow rate detector to the inlet side of the hot water supply flow rate detector, thereby preventing wasteful water leakage and running out of hot water. be able to.

(Embodiment 2)
2nd Embodiment assumes the automatic boiling operation to a bath, and the structure is shown in FIG. In FIG. 3, a description of the same configuration as in FIG. 1 is omitted, and the bath flow rate detector 18 that is not shown in FIG. 1 will be described. It is provided in the middle of the pipe to be supplied with hot water, and detects the flow rate of hot water for bath.

  In the present embodiment configured as described above, the operation and action will be described below with reference to the flowchart shown in FIG.

  First, the controller 16 confirms that the pouring electromagnetic valve 15 is closed (step 401). Next, the flow rate detected by the bath flow rate detector 18 is confirmed (step 402). When the flow rate is detected (that is, when the detection signal of the bath flow rate detector 18 is greater than 0), the alarm is sounded and shut off. The valve 7 is controlled to shut off the water supply from the water supply source (step 403). When the flow rate is not detected, the flow rate detected by the hot water supply flow rate detector 12 is confirmed (step 404).

  Then, when the flow rate is detected by the hot water supply flow rate detector 12, it is determined that hot water is being supplied (step 405). If the flow rate is not detected by the hot water flow rate detector 12 (that is, when the detection signal of the hot water flow rate detector 12 is 0), the flow rate detected by the hot water flow rate detector 5 is confirmed (step 406).

  When detected by the feed water flow detector 5 (that is, when the detection signal of the feed water flow detector 5 is> 0), it is determined that the water has leaked, and an alarm sound is emitted from the operation unit 17 and the shutoff valve 7 is closed (step 407). ). Further, when it is not detected by the water supply flow rate detector 5, it is determined that the water supply has already been shut off by the shutoff valve 7 (step 408).

  As described above, according to the hot water supply apparatus of the present invention, it is possible to detect water leakage in the piping from the hot water storage tank to the hot water supply flow rate detector, and it is possible to prevent wasteful water leakage and hot water shortage.

  As described above, the hot water supply apparatus according to the present invention can prevent wasteful water leakage and hot water shortage, and can be applied not only to electric water heaters but also to heat pump water heaters and the like.

Configuration diagram of hot water supply apparatus in Embodiment 1 of the present invention Processing flow diagram of hot water supply apparatus in Embodiment 1 of the present invention The block diagram of the hot-water supply apparatus in Embodiment 2 of this invention Processing flow diagram of hot water supply apparatus in Embodiment 2 of the present invention

5 Water supply flow rate detector 7 Shut-off valve 12 Hot water flow rate detector 15 Pouring solenoid valve 16 Controller 17 Operation unit 18 Bath flow rate detector

Claims (1)

A hot water storage tank, a feed water flow detector for detecting the feed water flow rate from the feed water source , a shutoff valve for shutting off the feed water from the feed water source to the hot water storage tank, and a hot water flow rate detection for detecting the hot water flow rate from the hot water storage tank to the terminal and vessels, and pouring the solenoid valve for regulating the hot water flow to the bath from the hot water storage tank, provided with a bath flow detector, a controller on the outlet side of the pouring solenoid valve, wherein the controller, firstly, the Check whether the pouring solenoid valve is in a closed state, and when the flow rate is detected by the bath flow detector even though the pouring solenoid valve is in a closed state, the shut-off valve is closed, Further, the pouring solenoid valve is closed, the bath flow rate detector does not detect the flow rate, the hot water supply flow rate detector does not detect the flow rate, and the feed water flow rate detector detects the flow rate. If detected, the outlet side of the feed water flow detector The hot water flow detector inlet leakage between the up-side is determined to have occurred, the water heater, characterized in that closing said shut-off valve.

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