JP2010185596A - 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 accurately detecting the supply of a large amount of hot water, and suppressing the excessive boil-up of the water in a hot water storage tank after the supply of a large amount of hot water by considering not only the supply of hot water to a bathtub but also overall hot water supply including hot water supply by a hot-water supply system (faucet and shower). <P>SOLUTION: The storage type hot water supply device (1) includes hot water supply amount detecting means (W1, T8, W2, T9) for detecting hot water supply amounts from the hot water storage tank (5), remaining hot water amount detecting means (T1-T6) detecting amounts of hot water remaining in the hot water storage tank, a control means for starting a heating means when the remaining hot water amount detected by the remaining hot water amount detecting means is a starting hot water remaining amount to start the heating means (3) or smaller, and a set value changing means for changing a set value of the starting hot water remaining amount from a first set value to a second set value lower than the first set value when the hot water supply amount of a prescribed amount or larger is detected within a time of a prescribed length by the hot water supply amount detecting means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hot water storage type hot water supply apparatus capable of filling a bathtub with hot water.

  In recent hot water storage type hot water supply apparatuses, a small capacity hot water storage tank is used in order to reduce the installation space. In such a hot water storage type hot water supply device, in order to prevent running out of hot water, immediately after a large amount of hot water, the heat pump unit (heating means) is activated to boil the water in the hot water storage tank, and the remaining hot water amount in the hot water storage tank is reduced. I try to secure enough.

  However, even if the water in the hot water storage tank is boiled immediately after the occurrence of a large amount of hot water to ensure a sufficient amount of hot water in the hot water storage tank, a large amount of hot water will be generated for a while after the occurrence of the large amount of hot water. Therefore, the amount of remaining hot water in the hot water storage tank is secured more than necessary, and the heat dissipation loss from the hot water in the hot water storage tank increases.

  Also, if the water in the hot water tank is boiled too much during the daytime hours and a sufficient amount of remaining hot water is secured in the hot water tank, there will be less water in the hot water tank to be boiled in the nighttime hours when the electricity rate is cheap, The ratio of boiling in the daytime hours when electricity charges are high increases and the economy is impaired.

  As a prior art related to such a hot water storage type hot water supply apparatus, one disclosed in Patent Document 1 is known.

JP 2002-130804 A

  The hot water storage type hot water supply device of Patent Document 1 controls the boiling operation of water in the hot water storage tank based on the ON operation of the hot water filling switch by the user, and a large amount of hot water is generated by the hot water supply (shower and currant). However, it is not possible to detect the large amount of hot water.

  An object of the present invention is to solve the above-described problems, and not only hot water to a bathtub but also general hot water including hot water from a hot water supply (faucet or shower) is considered. It is an object of the present invention to provide a hot water storage type hot water supply apparatus that can accurately detect occurrence of water and suppress excessive boiling of water in a hot water storage tank after a large amount of hot water is discharged.

  In order to solve the above-mentioned problem, the first aspect of the present invention detects a hot water storage tank (5), heating means (3) for heating water in the hot water storage tank, and the amount of hot water discharged from the hot water storage tank. Hot water amount detection means (T1 to T6, 150a) (W1, T8, W2, T9, 150a), remaining hot water amount detection means (T1 to T6, 150b) for detecting the remaining hot water amount in the hot water storage tank, and the remaining hot water amount When the amount of remaining hot water detected by the detection means is less than or equal to the amount of remaining hot water to activate the heating means, the control means (150d) for activating the heating means and a detection result of the amount of hot water detection means are a predetermined length. A setting for changing the set value of the amount of hot start hot water from the first set value (V1) to a second set value (V2) lower than the set value when the amount of discharged hot water exceeding a predetermined amount is detected within the time Value changing means (150c) Than is.

  According to a second aspect of the present invention, there is provided a hot water storage type hot water supply apparatus according to the first aspect, wherein the control means is configured such that the amount of remaining hot water detected by the remaining hot water amount detection means is the amount of stopped remaining hot water to stop the heating means. If it is above, the heating means is stopped, and the set value changing means detects the occurrence of the amount of hot water more than the predetermined amount within the predetermined length of time based on the detection result of the hot water amount detection means In addition, the set value of the amount of remaining hot water is changed from the third set value (U1) to a fourth set value (U2) lower than the third set value (U1).

  A third aspect of the present invention is the hot water storage type hot water supply apparatus according to the first aspect, wherein the second set value is set in advance as a fixed value.

  According to a fourth aspect of the present invention, there is provided a hot water storage type hot water supply apparatus according to the first aspect, wherein the amount of discharged hot water per time is estimated based on the detection result of the discharged hot water amount detecting means for a certain period, and the amount of discharged hot water. The second setting means (150f) for setting the second set value based on the above is further provided.

  A fifth aspect of the present invention is the hot water storage type hot water supply apparatus according to the second aspect, wherein the fourth set value is set in advance as a fixed value.

  According to a sixth aspect of the present invention, there is provided a hot water storage type hot water supply apparatus according to the second aspect, wherein an amount of hot water discharged per time is estimated based on a detection result of the hot water amount detection means for a certain period, and the amount of hot water discharged And a third setting means (150f) for setting the fourth set value based on the above.

  A seventh aspect of the present invention is the hot water storage type hot water supply apparatus according to any one of the first, third, and fourth aspects, wherein the set value changing means is not less than the predetermined amount within the predetermined length of time. In the time zone earlier than the first time zone set in advance as the time zone in which the amount of hot water is generated, when the amount of hot water more than the predetermined amount is detected within the predetermined length of time, The setting value is not changed.

  An eighth aspect of the present invention is the hot water storage type hot water supply apparatus according to any one of the second, fifth, and sixth aspects, wherein the set value changing means is equal to or greater than the predetermined amount within the predetermined length of time. In the time zone earlier than the first time zone set in advance as the time zone in which the amount of hot water is generated, when the occurrence of the amount of hot water more than the predetermined amount is detected within the predetermined length of time, The set value is not changed.

A ninth aspect of the present invention is the hot water storage type hot water supply apparatus according to any one of the first to eighth aspects,
The predetermined length of time is set in advance as a fixed value.

  A tenth aspect of the present invention is the hot water storage type hot water supply apparatus according to any one of the first to eighth aspects, wherein a time required for one hot water discharge is based on a detection result of the hot water amount detection means for a certain period. And a first setting means (150f) for setting the predetermined length of time based on the estimated time.

  An eleventh aspect of the present invention is the hot water storage type hot water supply apparatus according to any one of the first to tenth aspects, wherein the hot water amount detecting means is the hot water amount detecting means is the hot water storage tank (5). First water temperature detecting means (T8) for detecting the temperature of hot water flowing in the first pipe (h16) for flowing out the hot water from the water to a predetermined bathtub (9), and detecting the amount of hot water flowing in the first pipe. Based on detection results of the first water amount detection means (W1), the first water temperature detection means, and the first water amount detection means, the amount of hot water flowing in the first pipe is detected, and based on the detected amount of heat. And a detecting means (150a) for detecting the amount of hot water discharged from the hot water storage tank.

  A twelfth aspect of the present invention is the hot water storage type hot water supply apparatus according to any one of the first to eleventh aspects, wherein the hot water amount detecting means discharges hot water from the hot water storage tank other than a predetermined hot water bath ( 7) second water temperature detecting means (T9) for detecting the temperature of hot water flowing in the second pipe (h11) flowing to 7), and second water amount detecting means (W2) for detecting the amount of hot water flowing in the second pipe. ) And the second water temperature detection means and the detection result of the second water amount detection means, the amount of hot water flowing through the second pipe is detected, and the amount of hot water discharged from the hot water storage tank is detected based on the detected amount of heat. Detecting means (150a) for detecting.

  A thirteenth aspect of the present invention is the hot water storage type hot water supply apparatus according to the first to twelfth aspects, wherein the hot water storage type hot water supply apparatus includes hot water from the hot water storage tank (5) and a predetermined bathtub (9). And a heat exchanger (25) for exchanging heat with hot water from the hot water and a third temperature for detecting the temperature of hot water flowing through a circulation pipe (h21) for circulating hot water from the hot water storage tank into the heat exchanger. Water temperature detection means (T1) and third water amount detection means (P3) for detecting the amount of hot water flowing in the circulation pipe, and the detection means (150a) include the third water temperature detection means and The amount of hot water flowing through the circulation pipe is detected based on the detection result of the third water amount detection means, and the amount of hot water discharged from the hot water storage tank through the circulation pipe is detected based on the detected amount of heat.

  A fourteenth aspect of the present invention is the hot water storage type hot water supply apparatus according to the thirteenth aspect, further comprising a circulation pump (P3) disposed in the circulation pipe, wherein the third water amount detection means is the above-mentioned A circulation pump (P3) is used.

  A fifteenth aspect of the present invention is the hot water storage type hot water supply apparatus according to any one of the first to tenth aspects, wherein the hot water amount detection means is a plurality of water heaters disposed vertically along the hot water storage tank. Water temperature detection means (T1 to T6) and a change in the amount of heat of the remaining hot water in the hot water storage tank based on the detection results of the plurality of water temperature detection means, and the amount of hot water discharged from the hot water storage tank based on the change in the heat quantity And detecting means (150a) for detecting.

  The sixteenth aspect of the present invention comprises a hot water storage tank (5), heating means (3) for heating the water in the hot water storage tank, and hot water amount detection means (T1 to T6) for detecting the amount of hot water discharged from the hot water storage tank. , 150a) (W1, T8, W2, T9, 150a), the remaining hot water amount detecting means (T1 to T6, 150b) for detecting the remaining hot water amount in the hot water storage tank, and the remaining hot water amount detected by the remaining hot water amount detecting means, When the amount of remaining hot water to stop the heating means is equal to or greater than the remaining amount of hot water to be stopped, the control means (150d) for stopping the heating means and the amount of discharge exceeding a predetermined amount within a predetermined length of time based on the detection result of the hot water amount detection means. A set value changing means (150c) for changing the set value of the amount of remaining hot water to a fourth set value (U2) lower than the third set value (U1) when the amount of hot water is detected; Is provided.

  According to the first aspect of the present invention, when the occurrence of the amount of hot water more than a predetermined amount (that is, a large amount of hot water) is detected within a predetermined length of time, the set value of the startup remaining hot water amount is determined from the first set value. Since it is changed to a lower second set value, it is possible to prevent the heating means from starting after a large amount of hot water has occurred, thereby suppressing excessive boiling of water in the hot water storage tank after the occurrence of large amounts of hot water. it can. In addition, since the occurrence of a large amount of hot water is detected based on the amount of hot water discharged from the hot water storage tank, it is possible to consider not only the hot water to the bathtub, but also general hot water including hot water from the hot water supply (faucet and shower). It can be detected accurately.

  According to the second aspect of the present invention, when the occurrence of the amount of hot water more than a predetermined amount (that is, a large amount of hot water) is detected within a predetermined length of time, the set value of the remaining hot water amount is determined from the third set value. Since it is changed to a lower fourth set value, even if the heating means is started after the occurrence of a large amount of hot water, the drive time can be shortened, and the water in the hot water storage tank after the occurrence of the large amount of hot water is also reduced. It is possible to suppress excessive boiling.

  According to the third aspect of the present invention, since the second set value is set as a fixed value in advance, the second set value can be set to a desired value.

  According to the fourth aspect of the present invention, since the second set value is set by the second setting means, the second set value is automatically set to an appropriate value according to the state of occurrence of hot water. it can.

  According to the fifth aspect of the present invention, since the fourth set value is set as a fixed value in advance, the fourth set value can be set to a desired value.

  According to the sixth aspect of the present invention, since the fourth setting value is set by the third setting means, the fourth setting value is automatically set to an appropriate value in accordance with the state of occurrence of hot water. it can.

  According to the seventh aspect of the present invention, in the time zone earlier than the preset first time zone, occurrence of the amount of hot water more than a predetermined amount (that is, a large amount of hot water) is detected within a predetermined length of time. In this case, since the set value of the remaining amount of starting hot water is not changed, it is possible to prevent the setting value of the remaining amount of starting hot water from being changed to a second set value lower than the first set value from an early time period. It is possible to prevent the hot water in the tank from running out.

  According to the eighth aspect of the present invention, in the time zone earlier than the preset first time zone, the occurrence of the amount of hot water more than a predetermined amount (that is, a large amount of hot water) is detected within a predetermined length of time. In this case, since the set value of the remaining hot water amount is not changed, it is possible to prevent the set value of the stopped remaining hot water amount from being changed to the fourth set value that is lower than the third set value from an early time period. It is possible to prevent the hot water in the tank from running out.

  According to the ninth aspect of the present invention, since the predetermined length of time is set as a fixed value in advance, the predetermined length of time can be set to a desired value.

  According to the tenth aspect of the present invention, since the predetermined length of time is set by the first setting means, the predetermined length of time can be automatically determined to an appropriate value according to the state of occurrence of hot water. .

  According to the eleventh aspect of the present invention, the amount of hot water discharged from the hot water storage tank is detected based on the amount of hot water flowing through the first pipe for flowing hot water from the hot water storage tank to the predetermined bathtub. The amount of hot water discharged from the hot water storage tank can be detected.

  According to the twelfth aspect of the present invention, the amount of hot water discharged from the hot water storage tank is detected on the basis of the amount of hot water flowing through the second pipe for flowing hot water from the hot water storage tank to the hot water supply section. The amount of tapping from the tank can be detected.

  According to the thirteenth aspect of the present invention, the amount of hot water flowing in the circulation pipe for circulating the hot water from the hot water storage tank into the heat exchanger is detected to detect the amount of hot water from the hot water storage tank. The amount of hot water discharged from the hot water storage tank can be detected in consideration of the amount of hot water discharged.

  According to the fourteenth aspect of the present invention, since the circulation pump disposed in the circulation pipe is used as the third water amount detection means, it is not necessary to newly provide the water amount detection means.

  According to the fifteenth aspect of the present invention, since the amount of hot water discharged from the hot water storage tank is detected based on the detection result of the water temperature detecting means arranged in the hot water storage tank, the amount of hot water discharged from the hot water storage tank directly with a simple configuration. Can be detected.

  According to the sixteenth aspect of the present invention, when the occurrence of a hot water amount greater than a predetermined amount (that is, a large amount of hot water) is detected within a predetermined length of time, the set value of the remaining hot water amount is determined from the third set value. Since it is changed to a lower fourth set value, even if the heating means is started after the occurrence of a large amount of hot water, the drive time can be shortened, and the water in the hot water storage tank after the occurrence of the large amount of hot water is also reduced. It is possible to suppress excessive boiling.

1 is a schematic configuration diagram centering on piping of a hot water storage type hot water supply apparatus according to Embodiment 1. FIG. 1 is a schematic configuration diagram of a control device for a hot water storage type hot water supply apparatus according to Embodiment 1. FIG. It is a flowchart explaining operation | movement of the principal part of the hot water storage type hot-water supply apparatus which concerns on Example 1. FIG. (A) is a figure explaining 1 day boiling operation in the hot water storage type hot water supply apparatus which concerns on Example 1, (B) is a figure explaining 1 day boiling operation in the conventional hot water storage type hot water supply apparatus. It is. It is the structure schematic of the control apparatus of the hot water storage type hot-water supply apparatus which concerns on Example 3 and Example 4. FIG. FIG. 10 is a schematic configuration diagram centering on piping of a hot water storage type hot water supply apparatus according to a fifth embodiment.

[Example 1]
≪Overall structure≫
FIG. 1 is a configuration diagram of a hot water storage type hot water supply device 1 according to the first embodiment, FIG. 2 is a configuration diagram of a control device for the hot water storage tank 1, and FIG. FIG.

  The hot water storage type hot water supply device 1 stores hot water boiled by a heat pump unit (heating means) 3 in a hot water storage tank 5, and discharges the hot water stored in the bathtub 9 according to a user operation. Hot water is discharged from a hot water supply section (for example, a faucet or a shower) 7 other than the above.

  The hot water storage tank 5 is formed in a cylindrical shape, for example, and has a capacity of, for example, 180 L (L: liter). A can body thermistor (water temperature detecting means) T1 is disposed above the hot water storage tank 5, and a plurality of remaining hot water thermistors (water temperature detecting means) T2 to T6 are vertically arranged on the side of the hot water tank 5. Are spaced along the line. Each of the thermistors T1 to T6 measures the temperature of hot water or water in the hot water storage tank 5 (hereinafter referred to as hot water).

  Each of the thermistors T1 to T6 has a remaining hot water amount K (for example, K = zero L), A (for example, A = 20L), B (for example, B = 50L), C (for example, C = 80L), D (for example, each) D = 120L) and E (for example, E = 150L). The hot water storage tank 5 is always filled with hot water, and hot water is stored in order from the upper side of the hot water storage tank 5.

  A water supply port 5 a for supplying water into the hot water storage tank 5 is provided on the bottom surface of the hot water storage tank 5. The water supply port 5a is branched and connected to a branch point N1 of a second water supply pipe h2 to which tap water is supplied via a first water supply pipe h1. The first water supply pipe h1 is provided with a check valve B1 for preventing the water flowing in from the second water supply pipe h2 from flowing back.

  A discharge port 5 b is provided on the bottom surface of the hot water storage tank 5. The discharge port 5b is branched and connected to the second discharge pipe h4 via the first discharge pipe h3. A drainage three-way valve B2 is disposed at a branch connection point of the discharge pipes h3 and h4.

  Note that one end of the second discharge pipe h4 is connected to an HP (heat pump unit) circulation outlet 11, and the other end of the second discharge pipe h4 is connected to the drain connection port 13. The HP circulation outlet 11 is connected to the HP circulation return port 15 via a circulation pipe h5, and the drainage connection port 13 is connected to an external drainage pipe h6.

  The circulation pipe h5 is drawn into the heat pump 3. As the circulation pipe h5 is heated by the heat pump 3, the water flowing in from the HP circulation outlet 11 side is boiled in the circulation pipe h5 and flows out to the HP circulation return port 15 side.

  The three-way valve B2 for drainage adjusts the opening degree of the valve body by, for example, manual operation, so that water from the first discharge pipe h3 is discharged to the HP circulation outlet 11 side in the second discharge pipe h4 or drainage. It flows out to the connection port 13 side. The drainage three-way valve B2 is normally adjusted so that water from the first discharge pipe h3 flows out to the HP circulation outlet 11 side.

  The second discharge pipe h4 is provided with a circulation pump P1 for sending water from the drainage three-way valve B2 to the HP circulation outlet 11 side between the drainage three-way valve B2 and the HP circulation outlet 11. ing.

  A first hot water inlet 5 c is provided on the upper surface of the hot water storage tank 5, and a second hot water inlet 5 d is provided on the bottom surface of the hot water storage tank 5. The first hot water inlet 5c is connected to the HP circulation return port 15 via the first hot water pipe h7, and the second hot water inlet 5d is branched and connected to the first hot water pipe h7 via the second hot water pipe h9. ing. A three-way valve B3 is provided at a branch connection point of the hot water pipes h7 and h9.

  The three-way valve B3 is an electric type in which the opening degree of the valve body is adjusted by an electric motor. The three-way valve B3 adjusts the opening degree of the valve body under the control of the control device 150, which will be described later, so that hot water flowing in from the HP circulation return port 15 side of the first hot water pipe h7 passes through the first hot water pipe h7. It flows out to the 1st hot water inlet 5c side, or flows out to the 2nd hot water inlet 5d side through the 2nd hot water pipe h9.

  A hot water outlet 5 e is provided on the upper surface of the hot water storage tank 5. The hot water outlet 5e is connected to the hot water supply mixing valve B4 via the first hot water piping h10. Note that a check valve B5 for preventing backflow of hot water flowing in from the hot water outlet 5e side is disposed in the first hot water piping h10.

  The hot water supply mixing valve B4 is further connected to one end of the second water supply pipe h2 and one end of the hot water supply pipe h11. In addition, the other end port of the 2nd water supply pipe h2 is connected to the water supply connection port 17, and the water supply pipe h20 from the outside is connected to the water supply connection port 17. The other end of the hot water supply pipe h11 is connected to a hot water supply connection port 19, and a hot water supply part (for example, a faucet or a shower) 7 is connected to the hot water supply connection port 19 via a pipe h12.

  The hot water supply mixing valve B4 is an electric type in which the opening degree of the valve body is adjusted by an electric motor. The hot-water supply mixing valve B4 is adjusted to have a desired mixing ratio of hot water from the first hot water supply pipe h10 and water from the second water supply pipe h2 by adjusting the opening of the valve body under the control of the control device 150 described later. And the mixed hot water flows out to the hot water supply section 7 through the hot water supply pipe h11.

  The second water supply pipe h2 includes, for example, a strainer 20 with a check valve and a water temperature thermistor (water temperature) for detecting the temperature of water flowing through the second water supply pipe h2 between the water supply connection port 17 and the branch point N1. Detection means) T7 and a pressure reducing valve B7 for reducing the pressure of water flowing in from the water supply connection port 17 side to a predetermined water pressure (for example, 170 kPa) are provided.

  The strainer 20 with a check valve prevents the strainer S1 (for example, mesh number # 60) for removing dust contained in the water flowing in from the water supply connection port 17 side and the water flowing in from the water supply connection port 17 side from flowing back. And a check valve B6 for preventing it. The second water supply pipe h2 is provided with, for example, a check valve B8 for preventing the water flowing from the branch point N1 from flowing backward between the hot water supply mixing valve B4 and the branch point N1. Yes.

  The hot water supply pipe h11 is provided with a hot water supply amount sensor (water amount detection means) W2 for detecting the amount of hot water flowing through the hot water supply pipe h11 and a hot water supply thermistor (water temperature detection means) T9 for detecting the temperature of the hot water flowing through the hot water supply pipe h11. It is installed.

  One end of a third drain pipe h13 drawn to the outside is branched and connected to a branch point N2 of the first outlet pipe h10. Note that the branch point N2 is located, for example, between the hot water outlet 5e and the check valve B5 in the first hot water piping h10.

  The third drain pipe h13 is provided with a relief valve B9 with a negative pressure operation valve. When the water pressure in the hot water storage tank 5 is lower than a predetermined water pressure (for example, 190 kPa), the relief valve B9 with a negative pressure operation valve closes the valve body so that the hot water in the hot water storage tank 5 is connected to each part 5e → N2 → When the water pressure in the hot water storage tank 5 is not less than the predetermined water pressure, the valve body is opened so that the hot water in the hot water storage tank 5 is supplied to each part. It is discharged to the outside through the route 5e → N2 → h13.

  A hot water mixing valve B11 is connected to the branch point N3 of the first hot water piping h10 via the second hot water piping h14. Note that the branch point N3 is located, for example, between the branch point N2 and the check valve B5 in the first hot water supply pipe h10. Note that a check valve B10 for preventing the hot water flowing in from the branch point N3 from flowing backward is disposed in the second hot water discharge pipe h14.

  One end of a third water supply pipe h15 is connected to the hot water filling mixing valve B11, and one end of a third hot water supply pipe h16 is connected. The other end of the third water supply pipe h15 is connected to the branch point N4 of the second water supply pipe h2. For example, the branch point N4 is located between the check valve B8 and the branch point N1 in the second water supply pipe h2. Moreover, the other end port of the 3rd hot water piping h16 is connected to the bath piping port 21, and the bathtub 9 is arrange | positioned through the piping h17 at the bath piping port 21. FIG.

  The hot water mixing valve B11 is an electric type in which the opening degree of the valve body is adjusted by an electric motor. The hot water mixing valve B11 adjusts the opening degree of the valve body under the control of the control device 150, which will be described later, so that the hot water from the second hot water supply pipe h14 and the water from the third water supply pipe h15 are mixed as desired. It mixes by ratio, and the mixed hot water is made to flow out to the bathtub 9 side through the 3rd hot water piping h16.

  A composite water valve 23 is disposed in the third hot water discharge pipe h16. The composite water valve 23 includes a hot water solenoid valve B12, a hot water sensor (water amount detecting means) W1, check valves B13 and B14, and a drain valve B15. Each of these elements B12, B13, W2, and B14 is disposed in the third hot water discharge pipe h16 in that order from the hot water mixing valve B11 side, for example.

  The hot water solenoid valve B12 is an electric type in which the opening degree of the valve body is adjusted by an electric motor. The hot water solenoid valve B12 adjusts the amount of hot water flowing through the third hot water supply pipe h16 by adjusting the opening of the valve body under the control of the control device 150 described later. The hot water filling amount sensor W1 detects the amount of hot water flowing through the third hot water supply pipe h16. The check valves B13 and B14 prevent the hot water flowing through the third outlet pipe h16 from flowing backward to the hot water mixing valve B11 or the hot water from the bathtub 9 from flowing backward to the mixing valve B11. .

  The drain valve B15 is connected to a pipe h19 from the branch point N5 of the third hot water discharge pipe h16 and to a pipe h18 from the branch point N6 of the third hot water discharge pipe h16. The branch point N5 is located, for example, between the check valve B13 and the hot water quantity sensor W1, and the branch point N6 is, for example, between the hot water mixing valve B11 and the hot water solenoid valve B12. positioned. The drain valve B15 is connected to one end of a fourth drain pipe h27 drawn to the outside.

  The drain valve B15 opens the valve body, and discharges hot water stored in the third outlet pipe h16 from the fourth drain pipe h27 to the outside through the pipes h18 and h19. The drain valve B15 is configured manually, for example, manually or electrically, and the opening degree of the valve body is adjusted by control of the control device 150 described later.

  For example, a hot water thermistor (water temperature detecting means) T8 for detecting the temperature of hot water flowing through the third hot water piping h16 is disposed in the third hot water piping h16, for example, between the composite water valve 23 and the bath piping port 21. Yes.

  The hot water storage type hot water supply apparatus 1 includes a control device 150 and a remote control device (setting input means) 160 as shown in FIG. The control device 150 controls the valves B3, B4, B11, B12, the heat pump unit 3, and the pump P1 based on the detection results of the thermistors T1 to T9 and the water amount sensors W1, W2. The remote control device 160 receives user operations.

  The control device 150 includes a tapping amount detection unit (detection unit) 150a, a remaining hot water amount detection unit (remaining hot water amount detection unit) 150b, a set value change unit (set value change unit) 150c, and a control unit (control unit) 150d. It has.

  The amount of hot water detection unit 150 a detects the amount of hot water discharged from the hot water storage tank 5. Here, the hot water amount detection unit 150a detects the amount of hot water discharged from the hot water supply unit 7 by detecting the amount of hot water flowing through the hot water supply pipe h11 based on the detection results of the hot water supply amount sensor W2 and the hot water supply thermistor T9. To do. Further, the hot water amount detection unit 150a detects the amount of hot water flowing into the bathtub 9 by detecting the amount of hot water flowing through the third hot water piping h16 based on the detection results of the hot water amount sensor W1 and the hot water thermistor T8. To detect. And the amount of hot water detection part 150a detects the amount of hot water from the hot water storage tank 5 from those hot water amounts.

  Here, the amount of hot water discharged from the hot water storage tank 5 is detected as, for example, the amount of heat. The temperature of the remaining hot water in the hot water storage tank 5 is maintained at a predetermined temperature (temperature at the time of boiling), so if the amount of hot water discharged from the hot water storage tank 5 is known, the amount of hot water discharged from the hot water storage tank 5 is Can be identified.

  The remaining hot water detection unit 150b detects the remaining hot water amount in the hot water storage tank 5, and based on the detection results of the thermistors T1 to T6, the approximate position of the boundary surface between the remaining hot water and the water in the hot water storage tank 5 is determined. The amount of hot water in the hot water storage tank 5 is detected based on the detected position. For example, when the detected temperature of each thermistor T1 to T3 is a high temperature of 75 ° C. and the detected temperature of the thermistors T4 to T6 is a low temperature of 20 ° C., for example, It is determined that the boundary surface of water is at the height position of the thermistor T3, and the remaining hot water amount in the hot water storage tank 5 is detected as the remaining hot water amount B corresponding to the height position of the thermistor T3.

  Based on the detection result of the tapping amount detection unit 150a, the set value change unit 150c sets the set value V of the amount of remaining hot water to start the heat pump unit 3 to the set value V1 (here, for example) as shown in FIG. V1 = remaining hot water amount C) or a lower set value V2 (here, V2 = remaining hot water amount A). The set value changing unit 150c sets the set value U of the remaining hot water amount to stop the heat pump unit 3 to the set value U1 (here, based on the detection result of the tapping amount detecting unit 150a, for example, as shown in FIG. 4A). Then, U1 = remaining hot water amount E), or a lower set value U2 (here, U2 = remaining hot water amount B), or a set value U3 (= remaining hot water amount F) corresponding to the total amount state of the hot water storage tank 5 is changed. The set value V1 is set lower than the set value U1, and the set value V2 is set lower than the set value U2.

  The set value U1 is set to a value sufficient for the amount of hot water per day, for example, although it is lower than the full amount state of the hot water storage tank 5. The set value V1 is set to be lower than the set value U1, and is set to a value that does not run out of water for a large amount of hot water such as hot water filling the bathtub 9, for example. Each set value U2, V2 is set to a value obtained by multiplying the average value of the amount of hot water per time (or one day) by a predetermined coefficient, for example. The setting value U2 may be set to be higher than the setting value V2 by setting the predetermined coefficient of the setting value U2 larger than the predetermined coefficient of the setting value V2.

  The control unit 150d activates the heat pump unit 3 and the pump P1 and controls the three-way valve B3 based on an input operation to the remote control device 160, for example, to boil water in the hot water storage tank 5. Control unit 150d adjusts the temperature of hot water discharged from hot water supply unit 7 by controlling the opening degree of hot water supply mixing valve B4 based on an input operation to remote control device 160. Further, the control unit 150d controls the opening degree of the hot water mixing valve B11 based on an input operation to the remote control device 160 to adjust the temperature of the hot water discharged to the bathtub 9, and the opening degree of the hot water electromagnetic valve B12. The hot water supply to the bathtub 9 is controlled.

  In addition, the control unit 150d initially sets the amount of remaining hot water and the amount of remaining hot water at a predetermined time (for example, when the amount of remaining hot water in the hot water storage tank 5 is set to the full amount state (for example, 7:00)).

  Further, the control unit 150d controls the activation / stop of the heat pump unit 3 and the pump P1 based on the detection result of the remaining hot water amount detection unit 150b, and stops the boiling of water in the hot water storage tank 5.

  The set value changing unit 150c detects the amount of hot water from the hot water storage tank 5 at regular time intervals based on the detection result of the hot water amount detection unit 150a, and detects whether or not a large amount of hot water has been generated based on the detection result. More specifically, the detection of whether or not a large amount of hot water has occurred is performed based on whether or not a predetermined amount or more of hot water has been generated within a predetermined length of time. Here, the predetermined length of time is set in advance to, for example, 1 hour (fixed value). In addition, the predetermined amount is set in advance to an amount (fixed value) of about one hot water filling to the bathtub 9, for example.

  When the occurrence of a large amount of hot water is detected, the set value changing unit 150c changes the set values for the amount of remaining activated hot water and the amount of remaining hot water to be reduced.

≪Basic operation≫
In this hot water storage type hot water supply apparatus 1, the water in the external water supply pipe h20 is supplied to the hot water storage tank 5 through each part h2->N1->h1->B1-> 5a by the water pressure, so that the hot-water storage tank 5 is always full. Kept.

  When boiling the water in the hot water storage tank 5, the three-way valve B3 is first fully opened to the second hot water inlet 5d side (ie, the first hot water inlet 5c side is fully closed) under the control of the control unit 150d, and the heat pump Unit 3 and pump P1 are activated. By the activation of the pump P1, the water in the hot water storage tank 5 flows through the path of each part 5b → B2 → P1 → 11 → h5 → 15 → B3 → 5d. In addition, when the heat pump unit 3 is started, the circulation pipe h5 is heated by the heat pump unit 3 and water flowing through the circulation pipe h5 is boiled, and the boiled water flows from the second hot water inlet 5d to the bottom of the hot water storage tank 5. Returned to

  When a predetermined time has elapsed and when hot water of a predetermined high temperature (for example, 75 ° C.) is heated by heating by the heat pump unit 3, the three-way valve B3 is fully opened to the first hot water inlet 5c side under the control of the control unit 150d. (That is, the second hot water inlet 5d side is fully closed). Thereby, the water in the hot water storage tank 5 flows through the path | route of each part 5b-> B2-> P1-> 11-> h5-> 15-> B3-> 5c, is boiled up in the middle of the path | route, and stores hot water from the 1st hot water inlet 5c. Returned to the top of the tank. By continuing this state, the water in the hot water storage tank 5 is heated to a predetermined high temperature by the heat pump unit 3 and stored from the upper part of the hot water storage tank 5.

  At that time, the remaining hot water amount detection unit 150b detects the remaining hot water amount in the hot water storage tank 5 based on the detection results of the thermistors T1 to T6 disposed in the hot water storage tank 5. When the amount of remaining hot water in the hot water storage tank 5 reaches a predetermined amount, the control unit 150d stops the heat pump unit 3 and the pump P1, and stops boiling water in the hot water storage tank 5.

  In addition, when hot water having a desired hot water supply temperature is discharged from the hot water supply unit 7, first, the user inputs a desired hot water supply temperature setting to the microcomputer device 160. When the hot water supply unit 7 is opened by the user, the hot water in the hot water storage tank 5 flows into the hot water mixing valve B4 through the first hot water piping h10 and the water from the second water supply pipe h2 flows into the hot water mixing valve B4. In the hot water supply mixing valve B4, the hot water and water are mixed at a predetermined mixing ratio and discharged from the hot water supply section 7 through the hot water supply pipe h11. At that time, the temperature of the hot water flowing through the hot water supply pipe h11 is detected by the hot water supply thermistor T9, and the opening degree of the hot water mixing valve B4 is controlled by the control unit 150e so that the detected temperature becomes the desired hot water supply temperature. Then, the temperature of the hot water discharged from the hot water supply unit 7 is adjusted to the desired hot water supply temperature.

  When filling the bathtub 9 with water, first, a user sets a desired hot water temperature and a desired hot water amount in the microcomputer device 160. Then, when a user inputs a hot water start operation to the remote control device 160, the valve body of the hot water electromagnetic valve B12 is opened by the control unit 150e. As a result, hot water in the hot water storage tank 5 flows into the hot water mixing valve B11 through each part 5f → N9 → B10 → N8 → B11, and water from the second water supply pipe h2 passes through each part h2 → N4 → B11. In the hot water filling mixing valve 11, the hot water and water are mixed at a predetermined mixing ratio and discharged into the bathtub 9 through the third hot water piping h16. At that time, the temperature of the hot water flowing through the third hot water supply pipe h16 is detected by the hot water supply thermistor T8, and the controller 150e controls the temperature of the valve body of the hot water solenoid valve B11 so that the detected temperature becomes the desired hot water filling temperature. The opening degree is controlled, and the temperature of hot water discharged to the bathtub 9 is adjusted to the desired hot water filling temperature. At this time, since the pump P3 is stopped, the circulation of the hot water in the hot water storage tank 5 flowing through the first recirculation circulation pipe h21 and returning to the recirculation circulation return port 5g of the hot water storage tank 5 does not occur.

  When the controller 150e detects that the desired amount of hot water has been discharged into the bathtub 9 based on the detection result of the hot water sensor W1, the valve body of the hot water solenoid valve B12 is blocked. The hot water filling to the bathtub 9 is finished.

≪Boiling operation≫
Based on FIG. 3, the operation of boiling water in the hot water storage tank 5 will be described. First, at step S0, the control unit 150d initially sets the set value V for the remaining activated hot water amount to the set value V1 and sets the set value U for the remaining remaining hot water amount to the set value U1 at a predetermined time (for example, 7:00). Is set.

  In step S1, the control unit 150d determines whether or not the remaining hot water amount in the hot water storage tank 5 is equal to or less than the startup remaining hot water amount based on the detection result of the remaining hot water amount detection unit 150b. As a result of the determination, if the remaining hot water amount is not less than the starting remaining hot water amount, the process proceeds to step S3. On the other hand, if the remaining hot water amount is less than or equal to the starting remaining hot water amount, the heat pump unit 3 and the pump P1 are activated by the control unit 150d in step S2, the water in the hot water storage tank 5 is boiled, and the process proceeds to step S3. move on.

  In step S3, the control unit 150d determines whether or not the remaining hot water amount in the hot water storage tank 5 is equal to or greater than the stopped remaining hot water amount based on the detection result of the remaining hot water amount detection unit 150b. As a result of the determination, if the remaining hot water amount is not equal to or greater than the stopped remaining hot water amount, the process proceeds to step S5. On the other hand, if the amount of remaining hot water is equal to or greater than the amount of remaining hot water, the controller 150d stops the heat pump unit 3 and the pump P1 and stops the boiling of water in the hot water storage tank 5 in step S4. Then, the process proceeds to step S5.

  Then, in step S5, the set value changing unit 150c detects the amount of hot water from the hot water storage tank 5 based on the detection result of the hot water amount detection unit 150a, and based on the detection result, the presence / absence of occurrence of a large amount of hot water is detected. . And as a result of the detection, when generation | occurrence | production of a large amount of hot water is not detected, a process progresses to step S7. On the other hand, when the occurrence of a large amount of hot water is detected, in step S6, the set value changing unit 150c changes the set value V of the activated remaining hot water amount to the set value V2, and sets the set value U of the stopped remaining hot water amount. The value is changed to U2. By changing the set values V and U, when the large amount of hot water is generated, the water in the hot water storage tank 5 is prevented from being immediately heated. Then, after step S6 is executed, the process proceeds to step S7.

  In step S7, the control unit 150d calculates the time required for boiling the remaining hot water amount in the hot water storage tank 5 to the full amount state, and the time that goes back from the predetermined time (for example, 7:00). (Total amount boiling start time) is calculated, and the current time is compared with the total amount boiling start time. As a result of the comparison, if the current time is not after the total boiling start time, the process returns to step S1. On the other hand, when the current time is after the full boiling start time, the set value changing unit 150c is controlled by the control unit 150d in step S8, and the set value U of the remaining hot water amount is set to the full amount state of the hot water storage tank 5. The corresponding set value U3 is set, and the heat pump unit 3 and the pump P1 are activated to start boiling water in the hot water storage tank 5.

  Then, after step S8 is executed, if it is determined in step S9 that the remaining hot water amount in the hot water storage tank 5 is in the full state, the heat pump unit 3 and the pump P1 are stopped by the control unit 150d in step S10. Complete boiling is complete. Then, the process returns to step S0.

  FIG. 4 (A) is a diagram showing an example of the hot water supply status of one day (24 hours), the vertical axis indicates the remaining hot water amount Q in the hot water storage tank 5, and the horizontal axis indicates time. Next, the operation of FIG. 3 will be described by applying it to the hot water situation of FIG.

  At time t1 (for example, time 7:00), the remaining hot water amount Q in the hot water storage tank 5 is in the full amount state of the hot water storage tank 5, and the remaining hot water amount is set to a set value U1 (here, U1 = E), The remaining hot water amount is set to a set value V1 (here, V1 = C) (step S0).

  At time t1, since the remaining hot water amount Q is higher than the set value U1 of the stopped remaining hot water amount, this is determined by the control unit 150d, and the heat pump 3 and the pump P1 are stopped (step S4). From this state, when the remaining hot water amount Q gradually decreases due to the hot water from the hot water supply unit 7 and the like and becomes equal to or less than the set value V1 of the starting remaining hot water amount (time t2), this is determined by the control unit 150d, and the heat pump unit 3 Then, the pump P1 is started (steps S1 and S2), whereby the water in the hot water storage tank 5 is boiled and the remaining hot water amount Q is increased. When the remaining hot water amount Q becomes equal to or greater than the set value U1 of the stopped remaining hot water amount (time t3), the controller 150d determines that and stops the heat pump unit 3 and the pump P1 (steps S3 and S4). The increase in hot water quantity Q stops. In this way, while the starting remaining hot water amount is set to the set value V1 and the stopped remaining hot water amount is set to the set value U1, the remaining hot water amount Q is maintained in a range between the set values V1 and U1. Then, no large amount of hot water is generated (step S5), and if the current time is not after the total boiling start time (step S6), the process returns to step S1.

  When a large amount of hot water occurs at time t5 (for example, time 19:00), this is detected by the set value changing unit 150c, and the set value changing unit 150c changes the set value U of the remaining amount of hot water to the set value U2. At the same time, the setting value V of the amount of remaining activated hot water is changed to the setting value V2 (steps S5 and S6). Accordingly, the remaining hot water amount Q is maintained in a range between the settings U2 and V2.

  In this way, the setting value V of the startup remaining hot water amount is changed to the setting value V2 that is lower than the setting value V1, so that the heat pump unit 3 can be prevented from starting immediately after the occurrence of a large amount of hot water. It will be possible to secure a lot of water to be heated in the hot water storage tank at cheap night time. Moreover, even if the heat pump unit 3 is started, it can be stopped immediately by setting the set value U of the amount of remaining hot water to a set value U2 that is lower than the set value U1. A lot of water to be heated in the belt can be secured in the hot water storage tank 5.

  Then, when the total amount boiling start time (time t6 (eg, time 3:00)) is reached, the set value change unit 150c sets the set value U of the remaining hot water amount to the set value U3, and the control unit 150d sets the heat pump unit 3. And the pump P1 is started and the water in the hot water storage tank 5 is boiled (steps S7 and S8). When the remaining hot water amount Q in the hot water storage tank 5 reaches the full amount state at time t7 (= t1), the heat pump unit 3 and the pump P1 are stopped by the control unit 150d (steps S9 and S10).

  By such a boiling operation, for example, a time zone D1 from 7:00 to 10:00 (that is, it is desired to secure the remaining hot water amount Q in preparation for daytime, but it is a time zone where electricity charges are high. The time in which the water in the tank 5 is not desired to be boiled) and the time zone D2 from 10: 00 to 17:00 (that is, the time in which the electricity charges are high) In the time zone in which it is desired to prevent running out of hot water), the remaining hot water amount is set to the set value V1, so that the remaining hot water amount Q can be secured in preparation for daytime, and the set value V1 is set to a very high set value. If not, the boiling of water in the hot water storage tank 5 can be suppressed. In addition, since the amount of remaining hot water is set to a set value U1 lower than that in the full amount state, even if the water in the hot water storage tank 5 is boiled, it is possible to prevent the water from being boiled excessively.

  In addition, for example, the time zone D3 at time 17:00 to 23:00 (that is, when the remaining hot water amount Q is secured in preparation for a large amount of hot water and a large amount of hot water is generated, the water in the hot water storage tank 5 is boiled up. In the time zone in which it is desired to delay to the night time zone where the electricity bill is cheaper), the amount of remaining hot water is set to the set value V1 as in the time zone D2 before a large amount of hot water occurs. The amount of remaining hot water Q in the tank 5 can be secured, the boiling of water in the hot water storage tank 5 can be suppressed, and the amount of remaining hot water in the stop 5 is set to the set value U1, so that the water in the hot water storage tank 5 is heated up too much. Can be prevented. Then, after a large amount of hot water is generated, the amount of remaining activated hot water is set to a set value V2 lower than the set value V1, so that it is possible to suppress boiling of the water in the hot water storage tank 5 immediately after the large amount of hot water is discharged. Further, since the amount of remaining hot water is also set to a set value U2 that is lower than the set value U1, even if the water in the hot water storage tank 5 is heated, the boiling can be stopped immediately. As a result, it is possible to delay the boiling of the water in the hot water storage tank 5 at night time when the electricity rate is cheap.

  In addition, for example, a time zone D4 from time 23: 00 to 7:00 (that is, when it is desired to complete the boiling of all the water in the hot water storage tank 5 at time 7:00, and heat is released from the hot water in the hot water storage tank 5 at low electricity charges In the time zone in which the loss is reduced), the control unit 150d calculates the time required for boiling the remaining hot water amount in the hot water storage tank 5 to the full amount state at regular intervals based on the detection result of the remaining hot water amount detection unit 150b. To do. Then, the control unit 150d calculates a time (total amount boiling start time) that goes back from the required time from a predetermined time (time when the remaining hot water amount in the hot water storage tank 5 should be in a full state (for example, 7:00)). And the total boiling start time are compared. As a result of the comparison, if the current time is before the total amount boiling start time t6 (for example, 3:00), the amount of remaining activated hot water is set to the set value V2 and the amount of remaining remaining hot water is set to the set value U2. Therefore, the remaining hot water amount Q is suppressed to be small, and the heat radiation loss from the hot water in the hot water storage tank 5 is reduced. If the current time is after the total boiling start time t6, the control unit 150d controls the set value changing unit 150c to set the set value U of the remaining hot water amount to the set value U3 corresponding to the total amount state of the hot water storage tank 5. In addition, the heat pump unit 3 and the pump P1 are started to start boiling water in the hot water storage tank 5. Then, when the remaining hot water amount in the hot water storage tank 5 reaches the full amount state, the control unit 150d stops the heat pump unit 3 and the pump P1 and finishes boiling the whole amount. In this way, the remaining hot water amount Q can be brought into a full state at time 7:00.

≪Comparison with conventional boiling operation≫
FIG. 4B shows an example of the conventional operation of boiling water in the hot water storage tank in one day. The vertical axis indicates the amount of hot water in the hot water storage tank, and the horizontal axis indicates time. ing.

  Conventionally, the amount of remaining hot water is fixed to the set value V1, and the amount of remaining hot water is fixed to the set value U1 until the total boiling start time t8. Therefore, the remaining hot water amount Q in the hot water storage tank is always set to each set value U1, V1. Kept in between. Therefore, since the water in the hot water storage tank is boiled immediately after a large amount of hot water, there is a disadvantage that it is not possible to secure a large amount of water that should be boiled with electric power at night. Since a large amount of remaining hot water is retained in the hot water storage tank during a time zone that hardly occurs, there is a disadvantage that a large amount of heat dissipation loss occurs. These drawbacks are improved in the present invention as described above.

  According to the hot water storage type hot water supply apparatus 1 configured as described above, when the occurrence of a large amount of hot water is detected, the set value V of the amount of remaining activated hot water is lower than the set value V1 (first set value). Since it is changed to the set value V2 (second set value), it is possible to suppress activation of the heat pump unit (heating means) 3 after the occurrence of a large amount of hot water, thereby preventing excessive boiling of water in the hot water storage tank 5. Can be suppressed.

  Moreover, since the occurrence of a large amount of hot water is detected based on the amount of hot water discharged from the hot water storage tank 5, not only hot water to the bathtub 9 but also general hot water including hot water from the hot water supply (faucet or shower) 7 can be considered. Can be accurately detected.

  At that time, the amount of hot water discharged from the hot water storage tank 5 is detected based on the amount of hot water flowing through the third hot water supply pipe h16 (first pipe) flowing the hot water from the hot water storage tank 5 into the bathtub 9, The amount of hot water discharged from the hot water storage tank 5 can be detected. At that time, the amount of hot water discharged from the hot water storage tank 5 is detected based on the amount of hot water flowing through the hot water supply pipe h11 (second pipe) flowing from the hot water storage tank 5 to the hot water supply section 7 other than the bathtub 9. With this configuration, the amount of hot water discharged from the hot water storage tank 5 can be detected.

  When the occurrence of a large amount of hot water is detected, the set value U for the remaining amount of hot water is changed from the set value U1 (third set value) to a lower set value U2 (fourth set value). Even if the heat pump unit 3 is started after a large amount of hot water, the drive time can be shortened, and this can also suppress excessive boiling of water in the hot water storage tank 5.

  In addition, since the predetermined length of time related to the large quantity of hot water is set in advance as a fixed value, the predetermined length of time can be set to a desired value.

  Further, since each set value V2, U2 (second and fourth set values) is set as a fixed value in advance, each set value V2, U2 can be set to a desired value.

[Example 2]
In the first embodiment, the amount of hot water discharged from the hot water storage tank 5 is detected by detecting the amount of hot water flowing through the pipes h11 and h16 from the detection results of the thermistors T9 and T8 and the water quantity sensors W2 and W1 of the pipes h11 and h16. However, in this embodiment, the amount of hot water discharged from the hot water storage tank 5 is detected from the detected temperatures of the thermistors T1 to T6.

  More specifically, the amount of hot water detector 150a detects the amount of hot water in the hot water storage tank 5 and the temperature of the hot water from the detection temperatures of the thermistors T1 to T6 at regular intervals, and the hot water in the hot water storage tank 5 from these detection results. The amount of remaining hot water is detected. Then, the difference between the amount of heat of the remaining hot water detected this time and the amount of heat of the remaining hot water detected last time is calculated to detect a change in the amount of heat of the remaining hot water, and the amount of hot water discharged from the hot water storage tank 5 is detected from the change. In the above calculation, the amount of remaining hot water is converted into the amount of heat, but the difference between the amount of remaining hot water detected this time and the amount of remaining hot water detected last time is calculated to calculate the amount of hot water discharged from the hot water storage tank 5. Also good.

  The other configuration of this embodiment is the same as that of the first embodiment.

  According to the hot water storage type hot water supply apparatus 1B configured as described above, since the amount of hot water discharged from the hot water storage tank 5 is detected based on the detection result of the water temperature sensor (water temperature detection detecting means) disposed in the hot water storage tank 5, it is simple. With this configuration, the amount of hot water discharged from the hot water storage tank 5 can be detected directly.

[Example 3]
In this embodiment, in the time zone earlier than the time zone (set time zone) set in advance as the time zone in which a large amount of hot water (a predetermined amount or more of hot water in a predetermined length of time) occurs in the first embodiment. In the case where a large amount of hot water is detected by the hot water detection unit 150a, the set values U and V of the stopped hot water amount and the starting residual hot water amount are not changed.

  The set time zone may be set as a fixed value in a desired time zone by setting input to the remote control device 160. Alternatively, as shown in FIG. 5, a setting unit 150e is further added to the control device 150 of the first embodiment, and the setting unit 150e determines the constant amount based on the detection result of the tapping amount detection unit 150a for a certain period (for example, 24 hours). Information on the amount of hot water discharged at a certain time in the period (for example, every hour) is acquired, a time zone in which a large amount of hot water is generated is estimated based on the information, and the estimated time zone is set as the set time zone. You may let them. In this case, it is assumed that the amount of discharged hot water detector 150a detects the amount of discharged hot water at regular time intervals (for example, every hour). The set time zone information is set in a predetermined storage unit in the control device 150.

  For example, when the time 17:00 to 23:00 is set as the set time zone, even if a large amount of hot water is generated before 17:00, the set values U and V of the stopped remaining hot water amount and the activated remaining hot water amount are respectively set. The values are not changed to U2 and V2.

  The operation of the hot water storage type hot water supply apparatus according to this embodiment may be modified as shown in FIG. That is, when it is determined in step S5 that the remaining hot water amount has been generated by the control unit 150d, the control unit 150d further determines whether or not the determination time is earlier than the set time period. . As a result of the determination, if it is determined that the time zone is early, the process of step S7 is executed. On the other hand, if it is determined that the time zone is not early, the process of step S6 is executed.

  According to the hot water storage type hot water supply apparatus 1C configured as described above, the set values V and U of the start remaining hot water amount and the stop remaining hot water amount are set values V2 and U2 (second and fourth set values) from an early time zone. Therefore, it is possible to prevent the hot water in the hot water storage tank 5 from running out.

  When the set time zone is set as a fixed value in advance, the set time zone can be set to a desired time zone. Moreover, when setting a setting time slot | zone by the setting part 150e, a setting time slot | zone can be automatically set to an appropriate time slot | zone according to the generation | occurrence | production condition of a large amount of hot water.

[Example 4]
In this embodiment, in the first embodiment, the predetermined length of time when determining whether or not the amount of hot water is high (the amount of discharged hot water is equal to or greater than a predetermined amount within a predetermined length of time) and the set value U2 of the amount of remaining hot water to stop. And the set value V2 of the amount of remaining activated hot water is automatically set to the optimum value by the learning function.

  More specifically, the control device 150 of this embodiment further includes a setting unit 150f (first, second, and third setting means) as shown in FIG. The setting unit 150f acquires information on the amount of hot water discharged at a fixed time (for example, every hour) in the fixed period based on the detection result of the discharged water amount detection unit 150a for a fixed period (for example, 24 hours). Based on this, the length of time that a large amount of hot water is generated is estimated, and the time is set as the predetermined length of time. In this embodiment, it is assumed that the amount of hot water detection unit 150a detects the amount of hot water every certain time (for example, every hour).

  The setting unit 150f estimates the amount of tapping water per time (or one day) based on the detection result of the tapping amount detection unit 150a for a certain period (for example, 24 hours), and sets the set value U2 based on the estimated tapping amount. Set. Specifically, for example, an average value of the amount of hot water discharged once (or one day) is calculated from the amount of hot water discharged per time (or day), and a value obtained by multiplying the average value by a predetermined coefficient is set value U2. Set as.

  The setting unit 150f estimates the amount of hot water discharged per time (or one day) based on the detection result of the hot water amount detection unit 150a for a certain period (for example, 24 hours), and sets the set value V2 based on the amount of hot water discharged. . Specifically, for example, an average value of the amount of hot water discharged once (or one day) is calculated from the amount of hot water discharged per time (or one day), and a value obtained by multiplying the average value by a predetermined coefficient is set value V2. Set as.

  The setting value U2 may be set to be higher than the setting value V2 by making the predetermined coefficient of the setting value U2 larger than the predetermined coefficient of the setting value V2.

  According to the hot water storage hot water supply apparatus 1D configured as described above, the predetermined length of time, the set value U2 (fourth set value), and the set value V2 (second set value) are set by the setting unit 150f. Therefore, the predetermined length of time, the set value U2 and the set value V2 can be automatically set to appropriate values according to the state of occurrence of hot water.

  In this embodiment, the case where the predetermined length of time, the set value U2 and the set value V2 are set by the setting unit 150f has been described. However, any one of the predetermined length of time, the set value U2 and the set value V2 may be used. Only one or two may be set by the setting unit 150f.

[Example 5]
This embodiment is further provided with a reheating function for reheating the hot water in the bathtub 9 by exchanging heat between the hot water in the hot water storage tank 5 and the hot water in the bathtub 9 in the first embodiment. . Hereinafter, based on FIG. 6, the structure of the storage-type hot water supply apparatus 1E of this Example is demonstrated.

  This hot water storage type hot water supply apparatus 1E is different from the first embodiment in that the structure of the hot water discharge pipe from the hot water storage tank 5 to the bathtub 9 is different and that a pipe and a heat exchanger for a reheating function are added. Other than that, the configuration is the same. Hereinafter, the same reference numerals are assigned to the same or corresponding parts as in the first embodiment, and the description thereof will be omitted, and the configuration of the hot water storage type hot water supply apparatus 1E will be described focusing on differences from the first embodiment.

  On the upper surface of the hot water storage tank 5, a second hot water outlet 5f is provided. The second hot water outlet 5f is connected to the hot water mixing valve B11 via the second hot water piping h14. A check valve B10 for preventing the hot water from the hot water storage tank 5 from flowing backward is disposed in the second hot water discharge pipe h14.

  The hot water mixing valve B11 is further connected to one end of a third water supply pipe h15 and one end of a third hot water supply pipe h16. The other end of the third water supply pipe h15 is connected to the branch point N4 of the second water supply pipe h2. For example, the branch point N4 is located between the check valve B8 and the branch point N1 in the second water supply pipe h2. The other end of the third outlet pipe h16 is connected to the bath circulation outlet 23, and the bathtub 9 is disposed in the bath circulation outlet 23 via the pipe h17. In this embodiment, the water temperature thermistor T7 is disposed between the branch point N1 and the check valve B1 in the first water supply pipe h1.

  The hot water mixing valve B11 is an electric type in which the opening degree of the valve body is adjusted by an electric motor. Hot water mixing valve B11 adjusts the opening degree of the valve body under the control of control device 150, so that hot water from second hot water supply pipe h14 and water from third water supply pipe h15 are mixed at a desired mixing ratio. After mixing, the mixed hot water is allowed to flow out to the bathtub 9 side through the third hot water supply pipe h16.

  Further, a composite water valve 25 is disposed in the third hot water supply pipe h16. The composite water valve 25 includes a hot water solenoid valve B12, a hot water sensor (water amount detecting means) W1, check valves B13 and B14, and a drain valve B16. These elements B12, B13, W1, and B14 are arranged in the third hot water discharge pipe h16 in that order from the hot water filling mixing valve B11 side.

  The hot water solenoid valve B12 is an electric type in which the opening degree of the valve body is adjusted by an electric motor. The hot water solenoid valve B12 adjusts the amount of hot water flowing through the third hot water supply pipe h16 by adjusting the opening of the valve body under the control of the control device 150. The hot water filling amount sensor W1 detects the amount of hot water flowing through the third hot water supply pipe h16. The check valves B13 and B14 prevent the hot water flowing through the third outlet pipe h16 from flowing backward to the hot water mixing valve B11 or the hot water from the bathtub 9 from flowing backward to the mixing valve B11. .

  One end of a fourth drain pipe h27 drawn to the outside is connected to the branch point N5 of the third outlet pipe h16, and the drain valve B16 is disposed in the fourth drain pipe h27. The branch point N5 is located, for example, between the check valve B13 and the hot water quantity sensor W1.

  The drainage valve B16 opens the valve body, and discharges hot water stored in the third hot water discharge pipe h16 from the fourth drainage pipe h27 to the outside through the pipe h19. The drain valve B16 is, for example, configured manually and manually, or configured electrically and controlled by a control device 150 described later, so that the opening degree of the valve body is adjusted.

  In addition, a hot water thermistor (water temperature detecting means) T8 for detecting the temperature of the hot water flowing through the third hot water piping h16 is disposed in the third hot water piping h16, for example, between the composite water valve 25 and the bath circulation outlet 23. Has been.

  The hot water storage tank 5 is provided with a memory circulation return port 5g on the bottom surface. One end of a first tracking circulation pipe h21 is connected to the tracking circulation return port 5g. The other end of the first tracking circulation pipe h21 is connected to the branch point N8 of the second hot water supply pipe h14. The branch point N8 is located between the check valve B10 and the hot water filling mixing valve B11 in the second hot water discharge pipe h14.

  A part of the first tracking circulation pipe h <b> 21 is taken into the tracking heat exchanger 25.

  Further, the branch point N10 of the first tracking circulation pipe h21 is connected to the branch point N9 of the second hot water discharge pipe h14 via the pipe h22. The branch point N9 is located between the second hot water outlet 5f and the check valve B10 in the second hot water discharge pipe h14, and the branch point N10 is located between the branch point N8 and the additional heat exchanger 25. is doing.

  In addition, one end of a third drain pipe h13 drawn to the outside is connected to the branch point N8 of the second outlet pipe h14. The third drain pipe h13 is provided with a relief valve B9 with a negative pressure operation valve. When the water pressure in the hot water storage tank 5 is equal to or higher than a predetermined water pressure (for example, 190 kPa), the relief valve B9 with a negative pressure operation valve opens the valve body to supply hot water in the hot water storage tank 5 to each part 5f → N9 → When the water pressure in the hot water storage tank 5 is less than the predetermined water pressure, the valve body is closed so that the hot water in the hot water storage tank 5 is drained through the route of B10 → N8 → N12 → B9. It is prohibited to drain to the outside through the path of each part 5f → N9 → B10 → N8 → N12 → B9.

  The branch point N9 of the second outlet pipe h14 and the branch point N12 of the third drain pipe h13 are connected via the pipe h23, and the hot water flowing from the branch point N12 to the branch point N9 flows back to the pipe h23. A check valve B17 is provided to prevent this. The branch point N12 is located between the branch point N8 in the third drain pipe h13 and the relief valve B9.

  In addition, a heat exchange circulation pump P3 for circulating hot water flowing through the first recirculation circulation pipe h21 to the recirculation circulation return port 5g side of the hot water storage tank 5 is disposed. Here, the circulation pump P3 is disposed, for example, between the additional heat exchanger 25 and the additional circulation return port 5g in the first additional circulation pipe h21.

  One end of a fourth drain pipe h24 drawn to the outside is connected to the branch point N13 of the first chute circulation pipe h21, and the fourth drain pipe h24 is connected to the first chute circulation pipe h21. A drain plug B18 is provided for draining the accumulated water. As the drain plug B18, for example, a manual type is used.

  One end of a second recirculation circulation pipe h25 is connected to the branch point N14 of the third hot water supply pipe h16. The other end of the second memory circulation pipe h25 is connected to the bath circulation return port 27, and the bath circulation return port 27 is connected to the bathtub 9 via the pipe h26.

  A part of the second remedy circulation pipe h25 is drawn into the remedy heat exchanger 25 and can exchange heat with the first remedy circulation pipe h21.

  The second circulation circulation pipe h25 is provided with a bath circulation pump P4, a bath thermistor (water temperature detection means) T10, a water flow switch SW1, and a water level sensor Y.

  The bath circulation pump P4 is for taking hot water in the bathtub 9 from the bath circulation return port 27, circulating it in the second memorial circulation pipe h25, and returning it from the bath circulation outlet 23 into the bathtub 9. The bath thermistor T10 detects the temperature of the hot water flowing through the second memory circulation pipe h25. The water flow switch SW2 detects whether hot water is circulating in the second memorial circulation pipe h25. For example, the water flow switch SW2 is turned on when the hot water circulation is detected, and is turned off when the hot water circulation is not detected. Become. The water level sensor Y detects whether or not the water level in the bathtub 9 is higher than the water intake port 9a for the remedy of the bathtub 9, and for example, when a water pressure equal to or higher than a predetermined water pressure is detected, the water level in the bathtub 9 is It detects that it is higher than the water intake for remembrance. These elements P4, T10, SW1, and Y are disposed, for example, between the recuperation heat exchanger 25 and the bath circulation return port 27 in the second recirculation circulation pipe h25.

  The tapping amount detection unit 150a of this embodiment further detects the amount of hot water flowing through the first additional circulation pipe h21 based on the driving time of the circulation pump P3 in the tapping amount detection unit 150a of the first embodiment. By detecting the temperature of hot water flowing through the first additional circulation pipe h21 based on the detected temperature of the thermistor T1, and detecting the amount of water of the detected hot water flowing through the first additional circulation pipe h21 from the detected water amount and water temperature, the first The amount of hot water flowing through the memorial circulation pipe h21 is detected. Based on the amount of hot water flowing through the first hot water circulation pipe h21, the amount of hot water flowing through the hot water supply pipe h11, and the amount of hot water flowing through the third hot water supply pipe h16, the hot water quantity detection unit 150a The amount of tapping water is detected. Here, as in the first embodiment, the amount of hot water discharged from the hot water storage tank 5 is detected as the amount of heat.

  The remaining hot water amount detector 150b of this embodiment is the same as the remaining hot water amount detector 150b of the first embodiment.

  The control unit 150d of this embodiment further activates the circulation pump P4 based on information related to reheating (such as a renewal start instruction and a reheating temperature) set and input to the remote control device 160 in the control unit 150d of the first embodiment. Then, the hot water in the bathtub 9 is circulated in the second recirculation circulation pipe h25 through each part 27 → Y → SW1 → T10 → P4 → 25 → N13 → 23, and the circulation pump P3 is activated to store the hot water in the hot water storage tank 9 Hot water is circulated in the first recirculation circulation pipe h21 through the respective parts 5f → N9 → N8 → N10 → 25 → N13 → P3 → 5g. With these circulations, heat exchange is performed between the hot water from the hot water storage tank 5 and the hot water from the bathtub 9 in the reheating exchanger 25, and the hot water in the bathtub 9 is replenished.

  Note that the hot water from the hot water storage tank 5 subjected to heat exchange by the heat exchanger 25 is returned as water to the hot water storage tank 5 from the memorial circulation return port 5g. That is, the remaining hot water amount in the hot water storage tank 5 is reduced by the amount of hot water discharged from the second hot water outlet 5f.

  In addition, since the other component part of this hot water storage type hot water supply apparatus 1E is the same as Example 1, the description is abbreviate | omitted.

≪Basic operation≫
Next, the basic operation of the hot water storage type hot water supply apparatus 1E will be described focusing on the differences from the first embodiment.

  When hot water filling is performed on the bathtub 9, the piping path flowing from the hot water storage tank 5 to the bathtub 9 is basically the same as in the first embodiment. That is, in this embodiment, the hot water in the hot water storage tank 5 flows through the respective parts 5f → N9 → B10 → N8 → B11 to the hot water mixing valve B11 and is mixed with the water from the third water supply pipe h15 by the hot water mixing valve B11. Then, the hot water is discharged into the bathtub 9 through each part B11 → B12 → B13 → N5 → W1 → B14 → T8 → N13 → 23. At that time, since the pump P3 is stopped, the circulation of the hot water in the hot water storage tank 5 through the first recirculation circulation pipe h21 and returning to the recirculation circulation return port 5g of the hot water storage tank 5 does not occur.

  When the hot water in the bathtub 9 is refilled, the circulation pumps P3 and P4 are activated under the control of the control unit 150d in accordance with the refill start instruction input to the remote control device 160. Thereby, the hot water in the hot water storage tank 5 passes through each part 5 → 5f → N9 → B10 → N8 → N10 or each part 5 → 5f → N9 → h22 → N10, and further to each part N10 → 25 → N13 → P3 → 5g → 5. And circulates in the heat exchanger 25 for remembrance. And the hot water in the bathtub 9 circulates in the memory heat exchanger 25 through each part 9-> h26-> 27-> Y-> SW2-> T10-> P4-> 25-> N13-> 23-> h17-> 9. Then, heat exchange is performed between hot water from the hot water storage tank 5 and hot water from the bathtub 9 in the heat exchanger 25 for reheating, and hot water in the bathtub 9 is replenished. When the controller 150d detects that the temperature of the hot water from the bathtub 9 has reached a memorial temperature preset in the remote controller 160 based on the detected temperature of the bath thermistor T10, the control of the controller 150d Then, the circulation pumps P3 and P4 are stopped and the chasing is finished.

  When reheating, when the controller 150d detects that the water level in the bathtub 9 is lower than the water intake 9a for replenishment based on the detection result of the water level sensor Y, it retreats. May not be performed. In addition, after the circulation pump P4 is activated first by the control of the control unit 150d, the circulation pump is detected after it is detected that hot water flows through the second tracking circulation pipe h25 based on the detection result of the water flow switch SW1. P3 may be activated. Accordingly, it is possible to prevent reheating in a state where hot water is not flowing through the second recirculation circulation pipe h25.

  Since the operation of supplying water to the hot water storage tank 5, the operation of boiling water in the hot water storage tank 5 and the operation of hot water from the hot water supply section 7 are the same as those in the first embodiment, description thereof will be omitted. In addition, operation | movement of the principal part of this hot water storage type hot-water supply apparatus 1E is the same as the flowchart of FIG.

≪Detailed operation of boiling up≫
The operation of boiling water in the hot water storage tank 5 in this embodiment is the same as that of the first embodiment except that the amount of remaining hot water in the hot water storage tank 5 and the hot water discharged from the hot water storage tank 5 are taken into consideration in the hot water discharged by reheating. The explanation is omitted because it is the same as.

  According to the hot water storage type hot water supply apparatus 1E configured as described above, in addition to obtaining the same effect as that of the first embodiment, the first recirculation circulation pipe for circulating hot water from the hot water storage tank 5 into the heat exchanger 25 ( (Circulation pipe) Since the amount of hot water flowing from the hot water storage tank 5 is detected by detecting the amount of hot water flowing through the h21, the amount of hot water discharged from the hot water storage tank 5 can be detected in consideration of the amount of hot water discharged to the heat exchanger 25.

  Further, since the circulation pump P3 disposed in the first tracking circulation pipe h21 is used as the water amount detection means (third water amount detection means), it is not necessary to newly provide the water amount detection means.

  In this embodiment, the circulation pump P3 is used as the water amount detecting means for detecting the amount of hot water flowing through the first tracking circulation pipe h21. However, instead of the circulation pump P3, the first tracking circulation pipe is used. A water amount sensor may be provided at h21.

  In the first embodiment, when the scheduled filling time of hot water filling is set and inputted, the set value V of the remaining activated hot water amount is set to the set value V3 and the set value U of the stopped activated hot water amount is set to the set value U1, for example. Further, in this embodiment, even when the scheduled time for completion of reheating is set and inputted, similarly, the set value V of the remaining start hot water amount is set to the set value V3 and the set value U of the stopped remaining start hot water amount is set, for example You may make it set to the value U1. In this case, the same effect as in the case of hot water filling can be obtained.

  Needless to say, Example 5 may be combined with Example 2, 3 or 4.

1, 1B to 1E Hot water storage type hot water supply device 3 Heat pump unit 5 Hot water storage tank 7 Hot water supply section 9 Bath 25 Reheating heat exchanger h1 First water supply pipe h2 Second water supply pipe h3 First discharge pipe h4 Second discharge pipe h5 Circulation pipe h6 External drain pipe h7 1st hot water pipe h9 2nd hot water pipe h10 1st hot water pipe h11 Hot water supply pipe h13 3rd drain pipe h14 2nd hot water pipe h15 3rd hot water pipe h16 3rd hot water pipe h20 1st hot water pipe h21 1st memory Circulation piping h24 4th drain pipe h25 2nd memory circulation piping h27 4th drain pipe SW1 Water flow switch T1 Can body thermistor T2-T6 Remaining hot water thermistor T7 Water temperature thermistor T8 Hot water thermistor T9 Hot water thermistor T10 Bath thermistor U1 1st Setting value U2 Second setting value U3 Fifth setting value V1 Third setting value V2 Fourth setting value W2 Hot water amount sensor W1 water filling water sensor Y level sensor

Claims (16)

A hot water storage tank (5),
Heating means (3) for heating water in the hot water storage tank;
Hot water detection means (T1 to T6, 150a) (W1, T8, W2, T9, 150a) for detecting the amount of hot water from the hot water storage tank;
A remaining hot water amount detecting means (T1 to T6, 150b) for detecting the remaining hot water amount in the hot water storage tank;
When the amount of remaining hot water detected by the remaining hot water detection means is equal to or less than the amount of remaining activated hot water to activate the heating means, control means (150d) for activating the heating means,
When the occurrence of the amount of hot water exceeding a predetermined amount is detected within a predetermined length of time based on the detection result of the hot water amount detection means, the set value of the starting remaining hot water amount is changed from the first set value (V1) to that. A set value changing means (150c) for changing to a low second set value (V2);
A hot water storage type hot water supply apparatus comprising: The hot water storage type hot water supply device according to claim 1,
The control means, when the amount of remaining hot water detected by the remaining hot water amount detection means is equal to or greater than the amount of remaining hot water to stop the heating means, stops the heating means,
The set value changing means sets the set value of the stopped remaining hot water amount to a third value when the occurrence of the amount of hot water more than the predetermined amount is detected within the predetermined length of time based on the detection result of the hot water amount detecting means. A hot water storage type hot water supply apparatus, wherein the set value (U1) is changed to a fourth set value (U2) lower than the set value (U1). The hot water storage type hot water supply device according to claim 1,
The hot water storage hot water supply apparatus is characterized in that the second set value is set in advance as a fixed value. The hot water storage type hot water supply device according to claim 1,
The apparatus further comprises second setting means (150f) for estimating the amount of hot water discharged once or per day based on the detection result of the hot water amount detecting means for a certain period and setting the second set value based on the amount of hot water discharged. A hot water storage type hot water supply device characterized by that. The hot water storage type hot water supply apparatus according to claim 2,
The hot water storage type hot water supply apparatus, wherein the fourth set value is set in advance as a fixed value. The hot water storage type hot water supply apparatus according to claim 2,
The apparatus further includes third setting means (150f) for estimating the amount of hot water discharged once or per day based on the detection result of the hot water amount detecting means for a certain period and setting the fourth set value based on the amount of hot water discharged. A hot water storage type hot water supply device characterized by that. The hot water storage type hot water supply apparatus according to any one of claims 1, 3 and 4,
The set value changing means is within the predetermined length of time in a time zone that is earlier than a first time zone preset as a time zone in which the amount of hot water more than the predetermined amount is generated within the predetermined length of time. The hot water storage type hot water supply apparatus characterized by not changing the set value of the amount of hot start hot water when the generation of the amount of hot water exceeding the predetermined amount is detected. The hot water storage type hot water supply apparatus according to any one of claims 2, 5, and 6,
The set value changing means is within the predetermined length of time in a time zone that is earlier than a first time zone preset as a time zone in which the amount of hot water more than the predetermined amount is generated within the predetermined length of time. The hot water storage type hot water supply apparatus characterized by not changing the set value of the amount of remaining hot water when the generation of the amount of hot water exceeding the predetermined amount is detected. A hot water storage type hot water supply apparatus according to any one of claims 1 to 8,
The hot water storage type hot water supply apparatus, wherein the predetermined length of time is set in advance as a fixed value. A hot water storage type hot water supply apparatus according to any one of claims 1 to 8,
The apparatus further comprises first setting means (150f) for estimating a time required for one hot water discharge based on a detection result of the hot water amount detection means for a certain period and setting the predetermined length of time based on the estimated time. Hot water storage type hot water supply device characterized by A hot water storage type hot water supply apparatus according to any one of claims 1 to 10,
The tapping amount detection means
First water temperature detection means (T8) for detecting the temperature of hot water flowing in the first pipe (h16) for flowing hot water from the hot water storage tank (5) to a predetermined bathtub (9);
First water amount detection means (W1) for detecting the amount of hot water flowing in the first pipe;
The amount of hot water flowing through the first pipe is detected based on the detection results of the first water temperature detecting means and the first water amount detecting means, and the amount of hot water discharged from the hot water storage tank is detected based on the detected amount of heat. Detection means (150a);
A hot water storage type hot water supply apparatus comprising: A hot water storage type hot water supply apparatus according to any one of claims 1 to 11,
The tapping amount detection means
Second water temperature detection means (T9) for detecting the temperature of hot water flowing in the second pipe (h11) for flowing hot water from the hot water storage tank to a hot water supply section (7) other than a predetermined bathtub;
Second water amount detection means (W2) for detecting the amount of hot water flowing through the second pipe;
The amount of hot water flowing through the second pipe is detected based on the detection results of the second water temperature detecting means and the second water amount detecting means, and the amount of hot water discharged from the hot water storage tank is detected based on the detected amount of heat. Detection means (150a);
A hot water storage type hot water supply apparatus comprising: The hot water storage type hot water supply device according to claim 1,
The hot water storage water heater is
A heat exchanger (25) for exchanging heat between the hot water from the hot water storage tank (5) and hot water from a predetermined bathtub (9);
Third water temperature detecting means (T1) for detecting the temperature of hot water flowing through a circulation pipe (h21) for circulating hot water from the hot water storage tank into the heat exchanger;
Third water amount detection means (P3) for detecting the amount of hot water flowing through the circulation pipe;
With
The detection means (150a) detects the amount of heat of hot water flowing through the circulation pipe based on detection results of the third water temperature detection means and the third water amount detection means, and based on the detected amount of heat, the circulation pipe A hot water storage type hot water supply apparatus for detecting the amount of hot water discharged from the hot water storage tank through the hot water storage tank. The hot water storage type hot water supply apparatus according to claim 13,
A circulation pump (P3) disposed in the circulation pipe;
The hot water storage type hot water supply apparatus, wherein the circulation pump (P3) is used as the third water amount detection means. A hot water storage type hot water supply apparatus according to any one of claims 1 to 10,
The tapping amount detection means
A plurality of water temperature detecting means (T1 to T6) disposed vertically along the hot water storage tank;
Detecting means (150a) for detecting a change in the amount of heat of the remaining hot water in the hot water storage tank based on the detection results of the plurality of water temperature detecting means, and detecting the amount of hot water discharged from the hot water storage tank based on the change in the amount of heat;
A hot water storage type hot water supply apparatus comprising: A hot water storage tank (5),
Heating means (3) for heating water in the hot water storage tank;
Hot water detection means (T1 to T6, 150a) (W1, T8, W2, T9, 150a) for detecting the amount of hot water from the hot water storage tank;
A remaining hot water amount detecting means (T1 to T6, 150b) for detecting the remaining hot water amount in the hot water storage tank;
Control means (150d) for stopping the heating means when the amount of remaining hot water detected by the remaining hot water amount detection means is equal to or greater than the amount of remaining hot water to stop the heating means;
When the occurrence of the amount of hot water more than a predetermined amount is detected within a predetermined length of time based on the detection result of the hot water amount detection means, the set value of the amount of remaining hot water is changed from the third set value (U1) to it. Setting value changing means (150c) for changing to a lower fourth setting value (U2);
A hot water storage type hot water supply apparatus comprising:

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