JP2006250503A - Hot water storage type water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage type water heater capable of easily performing a water supply operation in construction. <P>SOLUTION: This hot water storage type water heater comprises a hot water storing tank 2 storing hot water heated to a high temperature by a heating means 21, and connected with a water supply pipe 4 at its lower portion and with a hot water supply circuit 11 to a bath at its upper portion, and a bath mixing valve 13 for mixing hot water and supplied water, and a hot water supply solenoid valve 14 for opening and closing the hot water supply circuit 11, respectively mounted on the hot water supply circuit 11. As the hot water supply solenoid valve 14 is opened in a state that the bath mixing valve 13 is fully opened to a hot water side, the water is supplied while releasing the air in the hot water storing tank 2 by utilizing the hot water supply circuit 11, and the hot water supply solenoid valve 14 is closed by counting-up of a prescribed time by a timer 32 counting a time from the start of water supply, when the water storing tank 2 is filled with water and the water supply is terminated, the water supply of the hot water storing tank 2 can be automatically performed by utilizing the hot water supply circuit 11, which improves convenience and usability. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a water filling operation after construction of a hot water storage type hot water supply apparatus that heats hot water and supplies hot water using a heat pump circuit or an electric heater.

Conventionally, in this type of hot water supply device, for water filling operation after construction, after manually opening the pressure relief valve communicating with the top of the hot water storage tank, the hot water storage is performed while water is supplied and air is discharged from the hot water storage tank. The tank was filled with water to fill the tank. (For example, Patent Document 1)
JP 2004-85060 A

  By the way, in this conventional system, since water overflows from the pressure relief valve, it is necessary to confirm that the hot water tank has been evacuated and the water filling is completed, and the pressure relief valve must be closed manually. In an apartment building such as an apartment or a condominium where many appliances are installed at the same time, this check alone requires a lot of workers or spends a lot of time, which is extremely inefficient. It had a problem called.

  The present invention pays attention to this point, and in order to solve the above problems, in claim 1, a hot water storage tank for storing hot water heated to a high temperature by a heating means, a water supply pipe connected to the lower part of the hot water storage tank, and an upper part Is connected to a hot water filling circuit for a bath, and the hot water filling circuit includes a bath mixing valve for mixing hot water and water supply, and a hot water solenoid valve for opening and closing the hot water filling circuit. By opening the hot water solenoid valve with the mixing valve fully open on the hot water side, the hot water filling circuit is used to fill the water while removing air from the hot water storage tank. The hot water solenoid valve is closed by counting up a predetermined time of a timer that counts the time from the start of water filling.

  According to a second aspect of the present invention, there is provided a hot water storage tank for storing hot water heated to a high temperature by the heating means, a water supply pipe connected to the lower part of the hot water storage tank, and a hot water filling circuit for the bath connected to the upper part. Has a bath mixing valve for mixing hot water and water supply and a hot water solenoid valve for opening and closing the hot water circuit, and the hot water solenoid valve is opened with the bath mixing valve fully open on the hot water side. By using the hot water filling circuit, the hot water tank is filled with the air inside the hot water storage tank, and the hot water filling tank is filled with water. It is performed by closing the hot water solenoid valve by water supply detection by a bath flow switch provided in the circuit.

  According to a third aspect of the present invention, there is provided a hot water storage tank for storing hot water heated to a high temperature by the heating means, a water supply pipe connected to the lower part of the hot water storage tank, and a hot water filling circuit for the bath connected to the upper part. Has a bath mixing valve for mixing hot water and water supply and a hot water solenoid valve for opening and closing the hot water circuit, and the hot water solenoid valve is opened with the bath mixing valve fully open on the hot water side. Thus, water filling is performed using the hot water filling circuit while removing air from the hot water storage tank, and when the hot water filling is completed, the hot water storage tank is filled with a predetermined water supply flow rate counter provided in the water supply pipe. The flow rate is counted by closing the hot water solenoid valve.

  Further, in claim 4, prior to the start of water filling, priming water is performed by opening the water supply side of the bath mixing valve, and in claim 5, the hot water storage tank is full of water or abnormally notified by a remote controller. Is.

  According to the first aspect of the present invention, the hot water storage tank after the construction is automatically filled using the existing hot water filling circuit without adding any special parts, which is extremely convenient and convenient to use. In addition, since the filling of the hot water storage tank due to the filling of the hot water tank is completed in accordance with the tammer time set with a margin in advance, there is no fear of erroneous detection, and it can be used with confidence.

  Further, in claim 2, without adding any special parts, water filling of the hot water storage tank after construction is automatically performed using an existing hot water filling circuit, which is extremely convenient and easy to use. In addition, the completion of water filling when the hot water storage tank is full is performed by using a bath flow switch that is provided in the bath circulation circuit and detects the presence or absence of remaining hot water in the bath. The flow is detected, the full water can be detected reliably, and it is extremely convenient to use.

  Moreover, in claim 3, without adding special parts, the existing hot water filling circuit is used to automatically fill the hot water storage tank after construction, which is very convenient and easy to use. In addition, the filling of the hot water storage tank is completed with a predetermined flow rate counted by the water supply flow rate counter provided in the water supply pipe, so there is no wasteful overflow water and the hot water storage tank can be accurately detected, making it extremely economical and efficient. Is.

  Further, in claim 4, since the priming water is opened by opening the water supply side of the bath mixing valve before the water filling is started, seizure of the bath flow switch and the water supply flow rate counter can be prevented, and the water flow and flow rate can be accurately detected. , And good detection can be maintained for a long time.

  Further, in claim 5, since the remote controller notifies the hot water tank of fullness or abnormal condition, it can be immediately recognized by the remote controller that water filling has been completed normally or it is abnormal and not full. It is.

Next, a hot water storage type hot water supply apparatus according to an embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a hot water storage tank unit, which internally includes a hot water storage tank 2 for storing hot water, a hot water pipe 3 connected to the upper part of the hot water storage tank 2, a water supply pipe 4 connected to the lower part of the hot water storage tank 2, and a hot water outlet. A hot water mixing valve 6 for mixing high temperature water from the pipe 3 and low temperature water from the hot water supply bypass pipe 5 branched from the water supply pipe 4, and a hot water supply pipe 7 connected downstream of the hot water mixing valve 6 are provided. A hot water supply temperature sensor 8 and a hot water supply flow switch 9 are provided.

  The hot water tank unit 1 further includes a hot water filling circuit 11 that connects the upper part of the hot water tank 2 and the bath circulation circuit 10. The hot water filling circuit 11 branches from the hot water from the hot water tank 2 and the hot water supply bypass pipe 5. A bath mixing valve 13 for mixing the low temperature water from the bath bypass pipe 12, a hot water solenoid valve 14 for opening and closing the hot water circuit 11, and a hot water flow rate counter 15 for counting the hot water amount. The bath circulation circuit 10 includes a water level sensor 16 that detects the water level of the bath, a bath circulation pump 17, a bath flow switch 18, a bath heat exchanger 19 provided in the upper part of the hot water tank 2, and the bath heat exchanger. A bath three-way valve 20 that bypasses 19 is provided.

  21 is a heating means comprising a heat pump circuit, and a heating circulation circuit 24 comprising a forward pipe 22 and a return pipe 23 is formed between the hot water storage tank 2 and the low temperature water in the lower part of the hot water storage tank 2 is driven by the heating circulation pump 25. Is passed through a water refrigerant heat exchanger (not shown) in the heating means 21 through the stop cock 26 to be heated to high temperature water and stored in the hot water via the return bypass valve 27 in the return pipe 23. Returning to the upper part of the tank 2, this circulation is repeated repeatedly to store hot water, and when freezing is prevented, the return bypass valve 27 is switched to the antifreezing bypass pipe 28 connected to the water supply pipe 4 connected to the lower part of the hot water storage tank 2. Thus, freezing is prevented as circulation of a short circuit using the lower part in the hot water tank 2, and the heating circulation pump 25 and the return bypass valve 27 are located in the hot water tank unit 1.

  Reference numeral 29 denotes a hot water supply control unit composed of a microcomputer or the like, which controls the heating and reheating of the hot water storage tank 2 by the heating circulation circuit 24, the temperature control of the hot water supply, the hot water filling and reheating of the bath, and the heat insulation. In addition, when the test operation switch 31 provided on the remote controller 30 is pressed, the bath mixing valve 13 of the hot water filling circuit 11 is switched from the water side 100% open state to the hot water side 100% state, and the hot water solenoid valve 14 is opened. The hot water filling circuit 11 is used for water filling while removing the air in the hot water storage tank 2 after the construction.

  Reference numeral 32 denotes a timer configured in the hot water supply control unit 29, which starts counting when the test operation switch 31 is pressed. Here, the bath mixing valve 13 is turned on via the hot water supply control unit 29 by counting up for a predetermined time of 30 minutes. While returning to 100% of the original water side, the hot water solenoid valve 14 is closed and the hot water filling using the hot water filling circuit 11 is terminated.

  Furthermore, in addition to the trial run switch 31, the remote controller 30 includes a hot water supply switch 33, a temperature setting switch 34 for setting the hot water supply set temperature, a hot water switch 35 for instructing the hot water filling to the bath, and a hot water filling for setting the hot water amount. A remote control unit 38 having a quantity setting switch 36 and further comprising a display unit 37 comprising a dot matrix type fluorescent display tube and a microcomputer for controlling the display unit 37 and communicating with the hot water supply control unit 29. Is provided.

  39 is a stop cock with a check valve connected to the hot water supply pipe 7, 40 is a relief valve connected to the top of the hot water storage tank 2, and 41 is a pressure reducing valve provided in the water supply pipe 4. A stopper 42 is provided, 43 is a drain stopper connected to the bottom of the hot water storage tank 2, and 44 is a drain stopper connected to the heating circuit 24.

Next, the operation of this embodiment will be described.
Now that the appliance is installed and the hot water supply circuit, the bath circulation circuit 10, the water supply pipe 4, and the hot water supply pipe 7 are connected to each other by piping, the construction is completed by connecting to the power source. If 31 is pressed (step 45), a test run start signal is output to the hot water supply control unit 22 in YES, and the hot water supply control unit 22 opens the bath mixing valve 13 of the hot water filling circuit 11 in the water side 100% open state in step 46. The hot water side solenoid valve 14 is opened at the same time as switching to the hot water side 100% state, and the timer 32 starts counting for a predetermined time, here 30 minutes.

  As a result, the air in the hot water storage tank 2 is extracted from the bath from the hot water filling circuit 11 through the bath circulation circuit 10, and the hot water filling is performed in the hot water storage tank 2 with the water supplied from the water supply pipe 4. Without providing any parts, the hot water filling circuit 11 is used to automatically bleed the air from the hot water storage tank 2 and fill it with water, which is very convenient and easy to use.

Then, when the timer 32 counts up for 30 minutes by proceeding to step 47, the process proceeds to step 48 with YES to return the bath mixing valve 13 to the original water side 100% via the hot water supply control unit 29 and the hot water solenoid valve. 14 is closed and water filling using the hot water filling circuit 11 is terminated. At this time, the remote control 30 displays “water filling end” as a character and notifies with a buzzer sound.
The 30-minute count by the timer 32 sets a time for the hot water storage tank 2 to be full in advance in the test. Naturally, if the capacity of the hot water storage tank 7 is changed, this predetermined time is also changed.
Further, after completion of the water filling of the hot water storage tank 2, the hot water filling test operation and the reheating test operation may be continuously performed.

  Next, in this hot water storage type hot water supply device, when it is nighttime, the hot water supply control unit 29 calculates the amount of hot water storage necessary for the next day, and instructs to heat up the target hot water storage amount by the end of the nighttime zone. Then, the heating means 21 is operated, and the heating circulation pump 25 of the heating circulation circuit 24 is started to be driven. Then, the hot water taken out from the lower part of the hot water storage tank 2 is heated by driving the heating circulation pump 25 and returned to the upper part of the hot water storage tank 2 to store hot hot water.

  When a hot water storage temperature sensor (not shown) provided on the side surface of the hot water storage tank 7 detects that a predetermined amount of hot water has been stored, the hot water supply control unit 29 instructs the heating means 21 to stop the heating operation. Then, the operation of the heating circulation pump 25 is stopped, and the hot water storage operation is completed by the end of the night time zone.

  When a hot water tap (not shown) is opened in this state, the high-temperature water in the upper part of the hot water storage tank 2 is mixed with hot water at the hot water mixing valve 6 from the hot water outlet pipe 3 and supplied as hot water at a set temperature through the hot water pipe 7. The hot water storage tank 2 is supplied with the water supply reduced by the hot water supply from the water supply pipe 4, and pushes the hot water up and repeats this in order to achieve good hot water supply.

Next, the first other embodiment shown in FIG. 4 and FIG. 5 will be described. The same parts as those of this embodiment are given the same reference numerals and the description thereof will be omitted, and only the differences will be described.
FIG. 4 shows the bath flow switch 18 on the input side of the hot water supply control unit 29 in order to use the bath flow switch 18 provided in the bath circulation circuit 10 instead of the timer 32.

  In operation, if the test operation switch 31 of the remote controller 30 is pressed (step 45), the process proceeds to step 49 with YES, and the hot water solenoid valve 14 is opened with the bath mixing valve 13 left open at 100%. A small amount of water is supplied to the bath flow switch 18 as priming water. In step 50, the filling water flow counter 15 counts a predetermined flow rate to terminate the priming water. In YES, the flow proceeds to step 51 and the filling water solenoid valve 14 is once closed. After that, in step 46, the bath mixing valve 13 of the hot water filling circuit 11 is switched from the water side 100% open state to the hot water side 100% state, and the hot water electromagnetic valve 14 is opened to use the hot water filling circuit 11. The hot water storage tank 2 is evacuated and filled with water.

  Further, when the hot water storage tank 2 becomes full in step 52, water flows into the bath circulation circuit 10 via the hot water filling circuit 11, so that the bath flow switch 18 detects this and proceeds to step 48 in YES to control hot water supply. The bath mixing valve 13 is returned to the original water side 100% through the section 29, and the water filling electromagnetic valve 14 is closed to finish the water filling using the water filling circuit 11, and the remote controller 30 has a "water filling" “End” is displayed as a letter, a buzzer sound is notified, and the water flow is detected by the bath flow switch 18 to detect the completion of water filling. is there.

  If NO in step 52, the flow advances to step 53, and the safety timer 54 that counts the time from the start of the trial run by pressing the trial run switch 31 detects the water flow even when the bath flow switch 18 exceeds the predetermined safety time. If not, it is determined as abnormal, and the process proceeds to step 55 with YES to forcibly close the hot water solenoid valve 14 and display a “water filling error” on the display unit 37 of the remote controller 30 as well as a warning sound. Therefore, safety can be ensured reliably, and automatic test operation can be performed with peace of mind even if a person is not present during the test operation.

  Next, the second other embodiment shown in FIGS. 6 to 8 will be described in the same manner. The hot water flow rate counter 15 is eliminated, and the water supply flow rate counter is located upstream of the branch portion of the hot water supply bypass tube 5 of the water supply tube 4. 56 is provided, and the amount of water directly flowing into the hot water storage tank 2 is counted by the water supply flow rate counter 56 and stopped when the water is full.

  If the test operation switch 31 of the remote controller 30 is pressed (step 45), the process proceeds to YES in step 49. First, the hot water solenoid valve 14 is opened with the bath mixing valve 13 left open at the water side 100%. A small amount of water is supplied as priming water to the feed water flow counter 56 to prevent burn-in and perform a smooth operation. In step 57, the feed water flow counter 56 counts a predetermined flow rate to terminate the priming water. If YES in step 51, the hot water solenoid valve 14 is once closed, and then in step 46, the bath mixing valve 13 of the hot water circuit 11 is switched from the water side 100% open state to the hot water side 100% state, and the hot water solenoid is set. By opening the valve 14, the hot water tank 2 is evacuated and filled with water using the hot water filling circuit 11.

  Further, the process proceeds to step 58, and the water supply flow rate counter 56 counts a preset flow rate at which the hot water storage tank 2 is full, so that the process proceeds to step 48 with YES, and the bath mixing valve 13 is connected to the original water via the hot water supply control unit 29. The water filling solenoid valve 14 is closed and the water filling using the water filling circuit 11 is terminated, and the remote control 30 displays “end of water filling” in a letter and notifies with a buzzer sound. Since the completion of water filling is detected by detecting the flow rate flowing into the hot water storage tank 2 by the water supply flow rate counter, it can be reliably detected that the water filling has been completed, and can be used with great peace of mind.

  If NO at step 58, the routine proceeds to step 53, where the safety timer 54 that counts the time from the start of the trial run due to the pressing of the trial run switch 31, the feed water flow rate counter 56 keeps the predetermined flow rate even if the predetermined safety time is exceeded. When it is not detected, it is judged as abnormal, and the process proceeds to step 55 with YES to forcibly close the hot water solenoid valve 14 and display “water filling error” on the display unit 37 of the remote controller 30 as well as an alarm sound. Thus, safety can be ensured reliably, and automatic test operation can be performed with peace of mind even if no one is present during the test operation.

  The hot water supply flow counter 56 is positioned upstream of the hot water supply bypass pipe 5 and can count the amount of water supplied to the hot water storage tank 2. It is also possible to detect the amount of hot water filling by calculating the difference.

The water filling state schematic block diagram of the hot water storage type hot water supply apparatus which shows one Embodiment of this invention. The block diagram of the principal part electric circuit. The flowchart of the principal part. The block diagram of the principal part electric circuit which shows 1st other embodiment. The flowchart of the principal part. The schematic block diagram which shows the water filling state of 2nd other embodiment. The block diagram of the principal part electric circuit. The flowchart of the principal part.

Explanation of symbols

2 Hot water storage tank 4 Water supply pipe 11 Hot water filling circuit 13 Bath mixing valve 14 Hot water filling solenoid valve 18 Bath flow switch 21 Heating means 31 Trial operation switch 32 Timer 56 Water supply flow rate counter

Claims (5)

  A hot water storage tank for storing hot water heated to a high temperature by a heating means, a water supply pipe is connected to the lower part of the hot water storage tank, and a hot water filling circuit to the bath is connected to the upper part. A bath mixing valve and a hot water solenoid valve that opens and closes the hot water circuit, the hot water solenoid valve is opened with the bath mixing valve fully open, Using a circuit to fill the hot water tank while removing air from the hot water tank, when the hot water tank is full, the end of the water filling is completed by counting up a predetermined time with a timer that counts the time from the start of the hot water filling. Hot water storage type hot water supply device characterized by being closed.   A hot water storage tank for storing hot water heated to a high temperature by a heating means, a water supply pipe is connected to the lower part of the hot water storage tank, and a hot water filling circuit to the bath is connected to the upper part. A bath mixing valve and a hot water solenoid valve that opens and closes the hot water circuit, the hot water solenoid valve is opened with the bath mixing valve fully open, Water filling is performed while venting the air in the hot water storage tank using a circuit, and when the hot water filling is completed, the hot water filling circuit or a bath circuit provided to the hot water filling circuit is connected. A hot water storage type hot water supply device that performs detection by supplying water with a flow switch and closing the hot water solenoid valve.   A hot water storage tank for storing hot water heated to a high temperature by a heating means, a water supply pipe is connected to the lower part of the hot water storage tank, and a hot water filling circuit to the bath is connected to the upper part. A bath mixing valve and a hot water solenoid valve that opens and closes the hot water circuit, the hot water solenoid valve is opened with the bath mixing valve fully open, Using a circuit, water filling is performed while venting air in the hot water storage tank, and when the hot water filling is completed, the hot water storage tank is filled with water at a predetermined flow rate set by a water supply flow rate counter provided in the water supply pipe. Hot water storage type hot water supply device characterized by closing the tension solenoid valve.   4. The hot water storage type hot water supply apparatus according to claim 2, wherein the water supply side of the bath mixing valve is opened before the water filling is started.   5. The hot water storage type hot water supply apparatus according to claim 1, wherein the hot water storage tank is informed of a full water or an abnormal state by a remote controller.

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