JP2011179735A - Storage type hot water supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage type hot water supply device capable of informing a proper exchange time of a water hammer prevention device for preventing water hammer phenomenon. <P>SOLUTION: A flow rate of hot water/water flowing in piping is detected by a flow rate sensor 13 disposed in a hot water supply pipe 12. When it is determined that the flow rate detected by a flow rate comparing means 20 is a set prescribed flow rate or more, it is added to the number of times of detection of the prescribed flow rate or more by a flow rate storing means 21 to calculate the accumulated number of times, and further when it is determined that the accumulated number of times calculated by a rotation comparing means 22 is a prescribed number of times or more, an exchange period of an accumulator 14 as the water hammer prevention device, is displayed on a monitor 17 of a remote controller 16 by an exchange informing means 23, and a user is notified of the same by voice from a speaker 18. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a hot water storage type hot water supply apparatus for storing heated hot water, and particularly detects a malfunction of a device due to a water hammer phenomenon.

  Conventionally, in this type of water, an accumulator as a water hammer preventer is installed in the middle of the hot water supply pipe to absorb the pulsation and impact pressure of the pipe in order to cope with the water hammer phenomenon caused by the high hot water pressure. By making it possible, damage to piping due to water hammer was prevented.

JP 2007-263394 A

  However, with this conventional device, even if the components that make up the accumulator deteriorate over time due to continued impact pressure due to water hammer, it is difficult to absorb the impact pressure. Since there was no water hammer, the impact pressure could not be absorbed when a water hammer occurred inside the pipe, and an impact sound was generated due to the water hammer. In some cases, the pipe was damaged.

  In order to solve the above-mentioned problems, in claim 1 of the present invention, a hot water storage tank for storing hot water, a hot water channel through which hot water discharged from the hot water tank flows, a water channel through which water flows, and the hot water channel A hot water supply channel through which hot water from the water channel and water from the water channel are mixed and circulated, a flow rate sensor installed in the middle of the hot water channel and detecting the flow rate of hot water flowing through the channel, and in the middle of the hot water channel In a hot water storage type hot water supply apparatus equipped with a water hammer preventer that is installed to prevent water hammer, the number of times that the flow rate detected by the flow sensor is greater than or equal to a predetermined value is stored, and the stored number of times is equal to or greater than the predetermined number of times. Then, a notification is made to prompt the user to replace the water hammer preventer.

  According to this invention, when the flow rate sensor detects that a large flow rate of hot water that is supposed to cause water hammer has passed through the hot water supply flow path, and the number of times the large flow rate is detected exceeds a predetermined number of times, By urging the user to replace the parts constituting the preventer when the replacement time has been reached, it is possible to prevent in advance the impact sound due to the occurrence of water hammer, damage to the piping, and the like.

Schematic configuration diagram of a hot water storage type hot water supply device representing one embodiment of the present invention Flowchart for explaining flow control according to an embodiment of the present invention

Next, an embodiment to which the present invention is applied will be described with reference to FIG.
Reference numeral 1 denotes a hot water storage tank for storing hot water heated by a heat pump unit 2 as a heating means, and reference numeral 3 denotes a pressure reducing valve for supplying city water in the water supply pipe 4 to the hot water storage tank 1 at a constant pressure.

  Reference numeral 5 denotes a heat pump forward pipe that connects the lower part of the hot water storage tank 1 and the heat pump unit 2 with a pipe, 6 denotes a heat pump return pipe that connects the heat pump unit 2 and the upper part of the hot water storage tank 1 with a pipe, and 7 denotes an intermediate part of the heat pump forward pipe 10. This is a heat pump circulation pump that conveys hot water in the hot water storage tank 1 into the heat pump unit 2.

  8 is a mixing valve that mixes hot water flowing in the hot water supply pipe 9 connected as the hot water flow path connected to the upper part of the hot water storage tank 1 and the water supply bypass pipe 10 as the water flow path branched from the water supply pipe 4 to an appropriate temperature. 11 is a hot water tap that is provided in various places such as a kitchen and a washroom, and discharges hot water by opening the tap.

  Reference numeral 12 denotes a hot water supply pipe serving as a hot water supply channel connected by piping so that hot water mixed at a mixing valve 8 to reach a hot water supply set temperature set by a remote controller, which will be described later, flows to the hot water tap 11. It is a flow rate sensor that detects the flow rate of hot water flowing through the pipe 12. Reference numeral 14 denotes an accumulator as a water hammer preventer capable of absorbing an impact when a water hammer phenomenon occurs in the hot water supply pipe 12 and an impact pressure is applied to the pipe.

  Reference numeral 15 denotes a hot water storage temperature detector that is installed in the side surface height direction of the hot water storage tank 1 and detects the temperature of the hot water stored in the tank. Reference numeral 16 denotes a remote controller having a plurality of switches capable of selecting various modes for boiling hot water with the heat pump unit 2, and serving as a display unit for displaying various information such as the boiling mode, the hot water supply set temperature, and the current time. A monitor 17 and a speaker 18 as a voice notification unit that notifies the user of various information such as a hot water supply temperature by voice.

  Reference numeral 19 denotes a flow rate control unit that performs various controls based on the flow rate information of the hot water flowing through the hot water supply pipe 12 detected by the flow rate sensor 13, and the flow rate of hot water detected by the flow rate sensor 13 and water hammer can occur. A flow rate comparison means 20 that compares a predetermined flow rate (for example, 20 L / min) with high characteristics, a flow rate storage means 21 that counts and stores the cumulative number of times the flow rate sensor 13 detects a predetermined flow rate or more, and the flow rate storage means 21 The number comparison means 22 for comparing the accumulated number of times and the predetermined number of times (for example, 10,000 times) at which the components constituting the accumulator 14 are consumed and the function as a water hammer preventer cannot be maintained. When the result output by the comparison means 22 is equal to or greater than the predetermined number of times, the display on the monitor 17 on the remote controller 16 or the speaker 18 prompts the user to replace the accumulator 14 And a replacement notification means 23 for notifying.

Next, the operation of this embodiment will be described based on the flowchart of FIG.
First, it is determined whether the hot water supply is started or the flow rate sensor 13 in the hot water supply pipe 12 detects the flow rate (S101). If the flow rate is detected, the process proceeds to the next step, and if the flow rate is not detected. The determination in S101 is repeated assuming that no hot water is supplied.

  If it is determined that the hot water supply is started in S101, the flow rate sensor 13 detects the flow rate of the hot water flowing through the hot water supply pipe 12 (S102), and the detected flow rate is a predetermined flow rate set in advance. The flow rate comparison means 20 determines whether this is the case (S103). If the detected flow rate is equal to or higher than the predetermined flow rate, the flow rate storage means 21 counts and stores the cumulative number of times that the flow rate sensor 13 has detected the predetermined flow rate or higher so far (S104). It is determined whether or not to stop hot water supply from the detection result in (S105). If hot water supply is stopped, it is determined again whether hot water supply is started in S101. If hot water supply is continued, the detected flow rate is compared with the predetermined flow rate again in S103. The

  When the flow rate storage means 21 stores the cumulative number in S104, the cumulative number is compared with a predetermined number within a range in which the accumulator 14 can maintain the function as a water hammer preventer (S106). If it is equal to or greater than the predetermined number of times, the replacement notification means 23 notifies the replacement operation of the accumulator 14 by display on the monitor 17 on the remote controller 16 or voice guidance by the speaker 18 (S107). It is determined whether or not to stop the hot water supply from the detection result of the flow rate sensor 13 (S108). When stopping the hot water supply, it is determined again whether or not the hot water supply is started at S101, and when continuing the hot water supply, the determination of S108 is repeated.

  As described above, the number of times that the flow rate detected by the flow rate sensor 13 is equal to or higher than the predetermined flow rate is stored, and when the cumulative number of times that the stored flow rate is higher than the predetermined flow rate is equal to or higher than the predetermined number, it is on the remote controller 16. By urging the user to replace the accumulator 14 with the monitor 17 or the speaker 18, the replacement time of the accumulator 14 as a water hammer preventer can be determined appropriately with a simple and low-cost configuration. Prevents problems such as damage.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 9 Hot water discharge pipe 10 Water supply bypass pipe 12 Hot water supply pipe 13 Flow rate sensor 14 Accumulator

Claims (1)

  A hot water storage tank for storing hot water, a hot water channel through which hot water discharged from the hot water tank circulates, a water channel through which water flows, hot water from the hot water channel and water from the water channel are mixed and distributed A hot water supply channel, a flow rate sensor that detects the flow rate of hot water that is installed in the middle of the hot water flow channel, and a water hammer preventer that is installed in the middle of the hot water flow channel and prevents water hammer. In the hot water storage type hot water supply device, the number of times that the flow rate detected by the flow rate sensor is equal to or greater than a predetermined value is stored, and when the stored number of times exceeds the predetermined number of times, a notification is made to encourage replacement of the water hammer preventer. Hot water storage type hot water supply device characterized by

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