JP2005090898A - Hot-water storage type hot-water supplier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the additional heating time of a hot-water storage type hot-water supplier that performs additional heating of bathtub water by heat exchange with the stored hot water in a hot-water storage tank. <P>SOLUTION: This hot-water storage type hot-water supplier comprises the hot-water storage tank 2 storing hot-water, a stored hot-water temperature sensor 33 monitoring the stored hot-water temperature of the hot-water storage tank 2, a bath circulation circuit 22 comprising a bath circulation pump 20 and circulating the hot-water of a bathtub 6, and a heat exchanger 18 placed in the middle of the bath circulation circuit 22 and heating the bathtub water by the hot-water stored in the hot-water storage tank 2 and performs additional heating by driving the bath circulation pump 20 and by circulating the bathtub water in the heat exchanger 18. When the stored hot-water heat quantity based on the stored hot-water temperature monitored by the stored hot-water temperature sensor 33 is at a predetermined heat quantity or higher at the time of additional heating, the bath circulation pump 20 is driven at the output higher than normal time as powerful additional heating operation and the circulation quantity of the bathtub water into the heat exchanger 18 is increased for reducing the additional heating time of bath. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hot water storage type hot water supply apparatus that uses hot water stored in a hot water storage tank to replenish hot water in a bathtub.

Conventionally, in this type of electric water heater and heat pump hot water storage type hot water supply device, hot water in the bathtub can be reheated using the hot water storage water in the hot water storage tank. If the temperature was detected and this temperature was equal to or higher than the predetermined temperature T1, the bath circulation pump was driven to circulate the bath water to the heat exchanger and perform the reheating operation.
JP 2003-50048 A

  However, in this conventional system, the output of the bath circulating pump when performing the reheating operation is constant, and the time required for retreating cannot be shortened.

  Accordingly, in order to solve the above problems, the present invention provides a hot water storage tank for storing hot water, a hot water storage temperature sensor for detecting the hot water storage temperature of the hot water storage tank, and a bath circulation pump for circulating hot water in the bathtub. A bath circulation circuit and a heat exchanger provided in the middle of the bath circulation circuit for heating the bath water with warm water stored in the hot water storage tank, and driving the bath circulation pump to bring the bath water into the heat exchanger. In the hot water storage type hot water supply apparatus that is circulated and reheated, when the reheating operation is performed, if the amount of stored hot water based on the hot water temperature detected by the hot water storage temperature sensor is equal to or greater than a predetermined heat amount, It is driven at a higher output than that for powerful chasing.

  Further, in claim 2, a hot water storage tank for storing hot water, a hot water storage temperature sensor for detecting the hot water storage temperature of the hot water storage tank, a bath circulation circuit having a bath circulation pump for circulating hot water in the bathtub, and a halfway of the bath circulation circuit And a heat exchanger that heats the bath water with hot water stored in the hot water storage tank, and drives the bath circulation pump to circulate the bath water to the heat exchanger and perform a reheating operation. In the hot water storage type hot water supply apparatus, when the hot water storage temperature detected by the hot water storage temperature sensor is equal to or higher than the predetermined temperature T1 and lower than the predetermined temperature T2 higher than the predetermined temperature T1, during the reheating operation, the bath circulation pump is normally output. When the hot water storage temperature detected by the hot water storage temperature sensor is equal to or higher than the predetermined temperature T2, the bath circulation pump outputs higher than usual. Driven to is obtained to perform powerful reheating operation.

  According to a third aspect of the present invention, when the hot water storage temperature detected by the hot water storage temperature sensor is lowered to the predetermined temperature T2 or less during the powerful chasing operation, the bath circulation pump is set to a normal output. It is designed to drive after driving.

  Further, according to a fourth aspect of the present invention, in the second aspect, during the powerful chasing operation, the hot water storage temperature detected by the hot water storage temperature sensor is lowered to a predetermined temperature T3 lower than the predetermined temperature T2 and higher than the predetermined temperature T1. Then, the bath circulation pump is driven at a normal output to perform a reheating operation.

  Further, according to claim 5, in the above-mentioned claim 2, a return temperature sensor is provided on the upstream side of the heat exchanger of the bath circulation circuit, and a run-off temperature sensor is provided on the downstream side. When the difference between the temperature detected by the bathing temperature sensor and the temperature detected by the bathing temperature sensor is equal to or less than a predetermined value, the bath circulating pump is driven at a normal output to perform a reheating operation. It is.

  According to a sixth aspect of the present invention, a hot water storage tank for storing hot water, a hot water temperature sensor for detecting the hot water storage temperature of the hot water storage tank, a bath circulation circuit having a bath circulation pump for circulating hot water in the bathtub, and a middle of the bath circulation circuit A heat exchanger that heats the bathtub water with hot water stored in the hot water storage tank, and a bath return temperature sensor provided on the upstream side of the heat exchanger of the bath circulation circuit, the bath circulation pump Is calculated based on the bath temperature detected by the bath return temperature sensor during the chasing operation in the hot water storage type hot water supply device in which the bath water is circulated through the heat exchanger and driven in the chasing operation. Based on the amount of heat Q1 required for reheating and the amount of stored hot water Q2 that can be used for reheating calculated based on the hot water storage temperature detected by the hot water storage temperature sensor, Is obtained so as to determine whether or not to perform powerful reheating operation is driven at a higher power than normal.

  Further, according to claim 7, when the hot water storage temperature detected by the hot water storage temperature sensor is lowered to a predetermined temperature T4 or less during the powerful chasing operation, the bath circulation pump is operated at a normal output. It is designed to drive and drive afterward.

  Further, according to an eighth aspect of the present invention, in the sixth aspect, a temperature sensor is provided on the downstream side of the heat exchanger in the circuit, and the temperature is detected by the temperature sensor during a powerful reheating operation. When the difference between the temperature and the temperature detected by the bath return temperature sensor is equal to or smaller than a predetermined value, the bath circulation pump is driven at a normal output to perform a reheating operation.

  According to a ninth aspect of the present invention, there is provided a hot water storage tank for storing hot water, heating means for heating the hot water stored in the hot water storage tank, a hot water storage temperature sensor for detecting the hot water storage temperature of the hot water storage tank, and a bath circulation pump. A bath circulation circuit for circulating hot water, a heat exchanger provided in the middle of the bath circulation circuit for heating the bath water with hot water stored in the hot water storage tank, and a remote control for remote operation, and driving the bath circulation pump In the hot water storage type hot water supply apparatus in which the bathtub water is circulated through the heat exchanger and is rerunning, the remote control is provided with rerunning operation instruction means and powerful replenishment operation instruction means, and the powerful reheating operation is performed. When the instruction means instructs the powerful chasing operation, the circulatory pump is driven at a higher output than the chasing operation, and the powerful chasing operation is performed. It is obtained to perform the operation.

  Further, according to claim 10, in the apparatus according to claim 9, when the hot water storage temperature detected by the hot water storage temperature sensor detects a temperature equal to or lower than a predetermined temperature T5 during the powerful chasing operation, the heating means is operated. It is.

  Further, in claim 11 according to claim 9, in the above-mentioned power recirculation operation, a flow return temperature sensor is provided on the upstream side of the heat exchanger of the flow circulation circuit, and a flow temperature sensor is provided on the downstream side. In addition, the heating means is operated when the difference between the temperature detected by the forward temperature sensor and the temperature detected by the return temperature sensor is a predetermined value or less.

  According to the first aspect of the present invention, when the hot water storage temperature sensor detects that there is a sufficient amount of heat in the hot water storage tank during the chasing operation, the water circulation pump is driven at a higher output than usual to perform powerful follow-up. Since the operation is carried out, it is possible to reduce the time required for retreating the bath.

  According to the second aspect of the present invention, when the hot water storage temperature sensor detects that the hot water storage temperature in the hot water storage tank is equal to or higher than the predetermined temperature T1 and lower than the predetermined temperature T2 during the reheating operation, the bath circulation pump is output at a normal output. When it is driven to perform a chasing operation and it is detected that the temperature is equal to or higher than a predetermined temperature T2 higher than the predetermined temperature T1, the bath circulation pump is driven at a higher output than usual to perform a powerful chasing operation. When there is a lot of heat, it is possible to shorten the time required to recharge the bath by powerful chasing operation.

  According to the third aspect of the present invention, if the hot water storage temperature falls below the predetermined temperature T2 during the powerful chasing operation, it is determined that the amount of hot water stored in the hot water tank does not remain sufficient for the powerful chasing operation. Since the circulation pump was driven to return to a normal output from a higher output than usual, and a normal reheating operation was performed, the circulating water was returned to an appropriate circulation amount with respect to the hot water in the hot water storage tank that had fallen in temperature. It can be exchanged for efficient refueling operation.

  According to the fourth aspect of the present invention, if the hot water storage temperature falls below the predetermined temperature T3 lower than the predetermined temperature T2 and higher than the predetermined temperature T1 during the powerful chasing operation, the amount of hot water stored in the hot water storage tank becomes the powerful chasing operation. Since it was judged that there was not enough remaining, the bath circulation pump was driven back from normal output to normal output, and normal refueling operation was performed. On the other hand, the amount of circulation is returned to an appropriate level, and sufficient heat exchange can be performed to perform efficient reheating operation.

  According to claim 5, when the temperature rise of the bathtub water that has passed through the heat exchanger is not more than a predetermined value during the powerful chasing operation, the amount of hot water stored in the hot water tank is sufficient for the powerful chasing operation. It was judged that there was no remaining amount, and the bath circulation pump was driven back from normal output to normal output, and the normal reheating operation was performed. It can be returned to an appropriate amount of circulation and fully heat exchanged for efficient reheating operation.

  Further, according to claim 6, during the reheating operation, the heat amount Q1 required for reheating and the hot water storage heat amount Q2 that can be used for reheating are calculated and compared to determine whether to perform the powerful reheating operation. When the amount of stored hot water Q2 that can be used for replenishment is sufficiently large compared to the amount of heat Q1 required for replenishment, the bath circulation pump is driven at a higher output than usual to perform powerful retreat operation. It is possible to shorten the bathing time.

  According to the seventh aspect of the present invention, if the hot water storage temperature falls below the predetermined temperature T4 during the powerful chasing operation, it is determined that the amount of hot water stored in the hot water tank does not remain sufficient for the powerful chasing operation. Since the circulation pump was driven to return to a normal output from a higher output than usual, and a normal reheating operation was performed, the circulating water was returned to an appropriate circulation amount with respect to the hot water in the hot water storage tank that had fallen in temperature. It can be exchanged for efficient refueling operation.

  According to claim 8, when the temperature rise of the bath water that has passed through the heat exchanger is not more than a predetermined value during the powerful chasing operation, the amount of hot water stored in the hot water tank is sufficient for the powerful chasing operation. It was judged that there was no remaining amount, and the bath circulation pump was driven back from normal output to normal output, and the normal reheating operation was performed. It can be returned to an appropriate amount of circulation and fully heat exchanged for efficient reheating operation.

  According to a ninth aspect of the present invention, the recirculation operation instructing means and the powerful retreat operation instructing means are provided, and when the powerful retreat operation instruction is given, the output of the full circulation pump is higher than that in the retreat operation. It is designed to perform powerful chasing operation by driving with a normal chasing operation and powerful chasing operation that can reduce chasing time by driving the full circulation pump with high output. Can be made.

  According to the tenth aspect, if the hot water storage temperature falls below the predetermined temperature T5 during the powerful reheating operation, it is determined that the amount of stored hot water in the hot water storage tank does not remain sufficient for the powerful reheating operation, By operating the means, the hot water in the hot water storage tank can be boiled up, and the time required for refilling the bath can be shortened.

  According to the eleventh aspect, during the powerful chasing operation, when the temperature rise of the bath water that has passed through the heat exchanger is not more than a predetermined value, the amount of hot water stored in the hot water tank is sufficient for the powerful chasing operation. It can be determined that there is no remaining amount, and the heating means is operated to increase the amount of hot water in the hot water storage tank, thereby shortening the time for refilling the bath.

  The present invention relates to a hot water storage tank 2 for storing hot water, a hot water storage temperature sensor 33 for detecting the hot water storage temperature of the hot water storage tank 2, a bath circulation circuit 22 provided with a bath circulation pump 20 and circulating hot water in a bathtub 6, and the bath. A heat exchanger 18 provided in the middle of the circulation circuit 22 for heating the bath water with the hot water stored in the hot water storage tank 2, and driving the bath circulation pump 20 to circulate the bath water to the heat exchanger 18. In the hot water storage type hot water supply apparatus configured to perform reheating operation, if the amount of stored hot water based on the stored hot water temperature detected by the hot water storage temperature sensor 33 is greater than or equal to a predetermined amount of heat during the reheating operation, the bath circulation pump 20 is normally operated. If the hot water storage type hot water supply device is driven at a higher output and performs a powerful reheating operation, and there is a sufficient amount of heat in the hot water storage tank 2, the bath circulation pump 2 The in which running powerful reheating operation is driven at a higher than normal output, it is possible to reduce the reheating time bath to increase the circulation amount of the bath water to the heat exchanger 18.

  Here, the amount of heat stored in the hot water does not mean only the amount of heat itself, but even when the hot water storage temperature sensor 33 detects a temperature equal to or higher than a predetermined temperature, the capacity of the hot water storage tank 2 is constant, so It is synonymous with detecting something, and is included in the claims.

  Next, Embodiment 1 of the present invention will be described. This hot water storage type hot water supply apparatus boils hot water in the midnight hours when the unit price of contracted electric power according to time zone is low, stores the hot water, and uses the stored hot water for hot water supply. 1 is a hot water storage tank unit having a hot water storage tank 2 for storing hot water, 3 is a heat pump unit as a heating means for heating hot water in the hot water storage tank, and 4 is a hot water tap provided in a kitchen or a washroom. Reference numeral 5 denotes a remote controller for remotely operating the hot water storage type hot water supply apparatus, and 6 denotes a bathtub.

  The hot water storage tank 2 of the hot water storage tank unit 1 has a hot water discharge pipe 7 connected to the upper end, a water supply pipe 8 connected to the lower end, a heat pump forward pipe 9 constituting a heat pump circulation circuit in the lower part, and a heat pump circulation circuit in the upper part. The heat pump return pipe 10 is connected, the hot water in the hot water storage tank 2 taken out from the heat pump forward pipe 9 is boiled by the heat pump unit 3 and returned to the hot water storage tank 2 from the heat pump return pipe 10 to be stored in the hot water supply pipe. The hot water in the hot water storage tank 2 is pushed up by the water supply from 8, and the hot water in the upper part of the hot water storage tank 2 is pushed out from the hot water discharge pipe 7 to supply hot water.

  The heat pump unit 3 includes a compressor 11, a refrigerant-water heat exchanger 12 as a condenser, an electronic expansion valve 13, a forced air-cooled evaporator 14, and hot water in the hot water storage tank 2. A heat pump circulation pump 16 that circulates to the refrigerant-water heat exchanger 12 through the heat pump forward pipe 9 and the heat pump return pipe 10 and a heat pump control unit 17 that controls driving thereof are provided in the heat pump circuit 15. Is one in which carbon dioxide is used as a refrigerant to constitute a supercritical heat pump cycle. Since carbon dioxide is used as the refrigerant, low-temperature water can be boiled up to a high temperature of about 90 ° C. without an electric heater.

  Here, the refrigerant-water heat exchanger 12 employs a counter flow system in which the refrigerant and hot water in the hot water storage tank 2 that is heated water are opposed to each other. In the supercritical heat pump cycle, the refrigerant is exchanged during heat exchange. Since it is condensed in the supercritical state, the heated water can be efficiently heated to a high temperature so that the temperature difference between the refrigerant-water heat exchanger 12 inlet temperature and the refrigerant outlet temperature is constant. Further, by controlling the electronic expansion valve 12 or the compressor 11, the water to be heated can be heated in a state where the COP (energy consumption efficiency) is very good.

  Next, 18 is a heat exchanger made of a stainless steel serpentine tube for heating the hot water in the bathtub 6, and is arranged at the upper part in the hot water storage tank 2. A bath circulation circuit 22 comprising a bath return pipe 21 provided with a bath circulation pump 20 is connected so that hot water in the bathtub 6 can be circulated, and the hot water in the bathtub 6 is heated by the high-temperature water in the hot water storage tank 2 for heat insulation. Or it is something that is chased.

  23 is a bath return temperature sensor that detects the temperature of the bath water flowing into the heat exchanger 18 through the bath return pipe 21, and 24 is a bath that flows out of the heat exchanger 18 and flows into the bath 6 through the bath pipe 19. A temperature sensor that detects the temperature of water.

  Next, 25 is a hot water mixing valve composed of an electric mixing valve that mixes hot water from the hot water discharge pipe 7 and low temperature water from the water supply bypass pipe 26 branched from the water supply pipe 9. The mixing ratio is controlled so that the hot water temperature detected by the provided hot water temperature sensor 28 becomes the hot water supply set temperature set by the user using the remote controller 5.

  Reference numeral 29 denotes a hot water filling pipe branched from the hot water supply pipe 27 and communicated with the bath return pipe 21. The hot water filling pipe 29 includes a hot water filling valve 30 for starting / stopping hot water filling to the bathtub 6, and a bathtub 6. A bath flow counter 31 that counts the amount of hot water filling and a check valve 32 that prevents the bath water from flowing back to the hot water supply pipe 27 are provided.

  Next, a plurality of hot water storage temperature sensors 33 are arranged in the vertical direction of the hot water storage tank 2, and in this embodiment, five hot water storage temperature sensors are arranged and are called 33a, 33b, 33c, 33d, 33e from the top. The amount of heat remaining in the hot water storage tank 2 is detected based on the temperature information detected by the temperature sensor 33, and the vertical temperature distribution in the hot water storage tank 2 is detected.

  The remote controller 5 is provided with a hot water supply temperature setting switch 34 for setting the hot water supply set temperature and a bath temperature setting switch 35 for setting the bath set temperature. An automatic bath switch 36 that fills the hot water by an amount of hot water set by a hot water filling amount setting switch (not shown) and keeps it warm for a predetermined time, and a reheating switch 37 that replenishes the bath water are provided.

  A hot water supply control unit 38 includes a microcomputer that receives the input of each sensor in the hot water storage tank unit 1 and controls driving of each actuator, and constitutes a control unit. The remote controller 5 is connected to the hot water supply control unit 38 by wireless or wired so that the user can set an arbitrary hot water set temperature and bath set temperature.

  Note that 39 is an overpressure relief valve for releasing the overpressure of the hot water storage tank 2, 40 is a pressure reducing valve for reducing the pressure of the water supply, 41 is a hot water supply flow rate counter for counting the amount of hot water to be supplied, and 42 is for detecting the temperature of the water supply. It is a feed water temperature sensor.

Next, the operation of the first embodiment will be described.
First, when the hot water storage temperature sensor 39 detects that the necessary amount of heat does not remain in the hot water storage tank 2 in the midnight power time zone, the hot water supply control unit 38 issues a boiling start command to the heat pump control unit 17. To emit. Upon receiving the command, the heat pump control unit 17 starts driving the heat pump after starting the compressor 11, and cools the low temperature water of about 5 to 20 ° C. taken out from the heat pump forward pipe 9 connected to the lower part of the hot water storage tank 2 as a refrigerant. -Heated to a high temperature of about 70 to 90 ° C by the water heat exchanger 12, returned to the hot water storage tank 2 from the heat pump return pipe 10 connected to the upper part of the hot water storage tank 2, and sequentially stacked from the upper part of the hot water storage tank 2 Store hot water. When the hot water storage temperature sensor 33 detects that the necessary amount of heat has been stored, the hot water supply control unit 38 issues a boiling stop command to the heat pump control unit 17, and the heat pump control unit 17 stops the compressor 11 and heat pump circulation. The pump 16 is also stopped to end the boiling operation.

  Next, the hot water supply operation will be described. When the hot water tap 4 is opened, the water supplied from the water supply pipe 8 flows into the hot water storage tank 2. Then, the hot water stored in the hot water storage tank 2 flows into the hot water supply mixing valve 25 through the hot water discharge pipe 7 and is mixed with the low temperature water from the hot water supply bypass pipe 26, and the hot water control section 38 sets the mixing ratio of the hot water supply mixing valve 28. The adjusted hot water at the hot water supply set temperature is supplied from the hot water tap 4. Then, the hot water supply is completed by closing the hot water tap 4.

  Next, the hot water filling operation to the bathtub 6 will be described. When the automatic bath switch 36 of the remote controller 5 is operated, the hot water supply control unit 38 opens the hot water filling valve 30. Then, the hot water adjusted to the set temperature by the hot water supply mixing valve 28 is poured from the hot water filling pipe 29 to the bathtub 6 through the hot water return pipe 21, and a bath flow rate counter 31 provided in the middle of the hot water filling pipe 29 is predetermined. When the amount of hot water filling is counted, the hot water supply control unit 38 closes the hot water filling valve 30 and ends the hot water filling operation.

  Next, the bathing operation will be described based on the flowchart shown in FIG. When the reheating switch 37 of the remote controller 5 is turned on and there is an instruction to start the reheating operation, the hot water supply control unit 38 checks the hot water storage temperature detected by the hot water storage temperature sensor 33 attached to the hot water storage tank 2, and the heat exchanger It is determined whether the hot water storage temperature in the vicinity of 18 is equal to or higher than a predetermined temperature T2 (here, 75 ° C.) that has a sufficient margin for heat exchange (step 1, hereinafter abbreviated as S1).

  When the hot water storage temperature in the vicinity of the heat exchanger 18 is equal to or higher than the predetermined temperature T2 (Yes in S1), the hot water supply control unit 38 starts driving the bath circulation pump 20 with a higher output than normal (S2), and the heat exchanger 18 The circulation amount of the bathtub water flowing into the hot water tank is increased from the normal amount, and the hot water stored in the upper part of the hot water storage tank 2 and the bathtub water are subjected to heat exchange to perform a powerful chasing operation.

  Then, after starting the powerful chasing operation, it is confirmed whether the hot water temperature of the hot water storage tank 2 detected by the hot water temperature sensor 33 has fallen below the predetermined temperature T2 (Yes in S3), and the temperature of the bath water is the target chasing. The chasing operation is continued until the sowing temperature is reached (S4).

  When the bath temperature detected by the bath return temperature sensor 23 reaches the bath set temperature, the hot water supply control unit 38 stops driving the bath circulating pump 20 (S5) and ends the reheating operation (S6). .

  Further, when the hot water storage temperature falls below the predetermined temperature T2 during the powerful chasing operation (No in S3), heat cannot be efficiently exchanged in the powerful chasing operation with the increased circulation amount. 20 is driven at a normal output (S7), and the hot water stored in the upper part of the hot water storage tank 2 and the bath water whose circulation amount is returned to the normal amount are efficiently heat-exchanged, and the bath reheating operation is performed. .

  Then, it is determined that the difference between the temperature detected by the bath temperature sensor 24 and the temperature detected by the bath return temperature sensor 23 is equal to or greater than a predetermined value, and the bath water is heated efficiently (Yes in S8). The chasing operation is continued until the temperature of the bath water reaches the target chasing temperature (S9).

  When the temperature detected by the bath return temperature sensor 23 reaches the reheating target temperature, the hot water supply control unit 38 stops driving the bath circulating pump 20 (S5) and ends the reheating operation (S6). .

  Here, the difference between the temperature detected by the forward temperature sensor 24 and the temperature detected by the return temperature sensor 23 during the reheating operation is less than a predetermined value, and it is determined that the bath water is not efficiently heated. Then (No in S8), the chasing operation is stopped (S10).

  Further, when an instruction to start the reheating operation is given, the hot water storage temperature in the vicinity of the heat exchanger 18 of the hot water storage tank 2 detected by the hot water storage temperature sensor 33 is lower than a predetermined temperature T2 (here, 75 ° C.) (No in S1). If the temperature is equal to or higher than a predetermined temperature T1 (here, 60 ° C.) lower than the predetermined temperature T2 (Yes in S11), the bath circulation pump 20 is started to drive at a normal output (S7) and is placed in the upper part of the hot water storage tank 2. The stored hot water and the bath water are exchanged for heat, and the bath is chased.

  Then, it is determined that the difference between the temperature detected by the bath temperature sensor 24 and the temperature detected by the bath return temperature sensor 23 is equal to or greater than a predetermined value, and the bath water is heated efficiently (Yes in S8). The chasing operation is continued until the temperature of the bath water reaches the target chasing temperature (S9).

  When the temperature detected by the bath return temperature sensor 23 reaches the reheating target temperature, the hot water supply control unit 38 stops driving the bath circulating pump 20 (S5) and ends the reheating operation (S6). .

  Here, the difference between the temperature detected by the forward temperature sensor 24 and the temperature detected by the return temperature sensor 23 during the reheating operation is less than a predetermined value, and it is determined that the bath water is not efficiently heated. Then (No in S8), the chasing operation is stopped (S10).

  Thus, when the hot water storage temperature of the hot water storage tank 2 is higher than the predetermined temperature T2 (when there is a sufficient amount of heat in the hot water storage tank 2), the bath circulation pump 20 is driven at a higher output than usual. The bath water circulation amount to the heat exchanger 18 can be increased to shorten the bath replenishment time.

  Further, after starting a powerful chasing operation, heat exchange of the hot water storage tank 2 detected by the hot water storage temperature sensor 33 due to factors such as heat exchange in the heat exchanger 18 or use of hot water in the hot water storage tank 2 for hot water supply. If it is detected that the hot water storage temperature in the vicinity of the vessel 18 has dropped below the predetermined temperature T2 and it is determined that the amount of hot water stored in the hot water storage tank 2 does not remain sufficient for a powerful chasing operation, the bath circulation pump 20 is Since it is driven to return to normal output from higher output and perform normal reheating operation, it is returned to an appropriate circulation amount for the hot water in the hot water storage tank 2 whose temperature has dropped, and the heat is sufficiently exchanged. High temperature hot water can be returned to the bathtub 6.

  Next, a second embodiment of the present invention will be described. The description of the same configuration as that of the first embodiment will be omitted, and the reheating operation will be described based on the flowchart shown in FIG.

  In the second embodiment, when the hot water storage temperature is lower than the predetermined temperature T2 and lower than the predetermined temperature T3 higher than the predetermined temperature T1 (No in S12) during the powerful chasing operation, the powerful chasing with increased circulation amount is performed. Since heat cannot be exchanged efficiently during operation, the bath circulation pump 20 is driven at a normal output (S7) to efficiently heat the hot water and bathtub water stored in the upper part of the hot water tank 2. Replace the bath and perform a chasing operation.

  In the second embodiment, the hot water storage tank that is detected by the hot water storage temperature sensor 33 due to factors such as heat exchange in the heat exchanger 18 or use of hot water in the hot water storage tank 2 for hot water supply after the start of the powerful reheating operation. It is detected that the hot water storage temperature in the vicinity of the second heat exchanger 18 is lower than the predetermined temperature T2 and lower than the predetermined temperature T3 higher than the predetermined temperature T1, and the amount of hot water stored in the hot water storage tank 2 is sufficient for a powerful reheating operation. When it is determined that the amount does not remain, the bath circulation pump 20 is driven back to the normal output from the higher output than normal, and the normal reheating operation is performed. The water is returned to an appropriate circulation amount with respect to the hot water, and the heat is sufficiently exchanged so that hot water having a high temperature can be returned to the bathtub 6.

  The other operations are the same as those in the first embodiment, and will not be described. However, when the hot water storage temperature of the hot water storage tank 2 is higher than the predetermined temperature T2 (when there is a sufficient amount of heat in the hot water storage tank 2). Since the bath circulation pump 20 is driven at a higher output than usual, the circulation amount of the bath water to the heat exchanger 18 can be increased and the bath replenishment time can be shortened.

  Next, Embodiment 3 of the present invention will be described. Note that the description of the same configuration as that of the first embodiment is omitted, and the chasing operation is described based on the flowchart shown in FIG.

  In the third embodiment, the difference between the temperature detected by the forward temperature sensor 24 and the temperature detected by the return temperature sensor 23 is less than a predetermined value during the powerful chasing operation, and the bath water is efficiently heated. If it is determined that there is no (No in S13), heat cannot be efficiently exchanged by the powerful reheating operation with the increased circulation amount, the bath circulation pump 20 is driven at a normal output (S7), and the hot water storage The hot water stored in the upper part of the tank 2 and the bathtub water are efficiently heat-exchanged to carry out the bath chasing operation.

  In the third embodiment, the hot water storage tank that is detected by the hot water storage temperature sensor 33 due to factors such as heat exchange in the heat exchanger 18 or use of hot water in the hot water storage tank 2 for hot water supply after the start of the powerful chasing operation. The difference between the temperature detected by the forward temperature sensor 24 and the temperature detected by the return temperature sensor 23 is that the hot water storage temperature in the vicinity of the heat exchanger 18 of the second heat exchanger 18 is lowered and the bath water is not efficiently heated. If it is detected that the amount of stored hot water in the hot water storage tank 2 is less than the predetermined value and it is determined that there is not enough heat remaining in the powerful reheating operation, the bath circulation pump 20 is switched from a higher output to a normal output. Since the normal reheating operation is performed, the hot water in the hot water storage tank 2 whose temperature has been lowered is returned to an appropriate circulation amount, and the heat is sufficiently exchanged so that hot water having a high temperature is supplied to the bathtub 6. To return to It is those that can.

  The other operations are the same as those in the first embodiment, and will not be described. However, when the hot water storage temperature of the hot water storage tank 2 is higher than the predetermined temperature T2 (when there is a sufficient amount of heat in the hot water storage tank 2). Since the bath circulation pump 20 is driven at a higher output than usual, the circulation amount of the bath water to the heat exchanger 18 can be increased and the bath replenishment time can be shortened.

  Next, a fourth embodiment of the present invention will be described. Note that the description of the same configuration as that of the first embodiment is omitted, and the chasing operation is described based on the flowchart shown in FIG.

  When the reheating switch 37 of the remote controller 5 is turned on and there is an instruction to start reheating operation, the hot water supply control unit 38 starts driving the bath circulation pump 20 with a normal output (S101), and bath water is supplied to the heat exchanger 18. Circulate and start chasing after driving.

  At this time, the bath temperature is detected by the bath return temperature sensor 23, and the amount of heat Q1 necessary for the bathing is calculated from the bathing target temperature and the previously stored and stored bathtub capacity (S102). The bathtub capacity is provided with a water level sensor (not shown) in the middle of the circulation circuit 22, and the capacity from the detected water level and the previously stored bathtub cross-sectional area and the bottom surface of the bathtub 6 to the bathtub circulation port (not shown). It is even better to calculate and use the current amount of water.

  Then, the hot water storage heat quantity Q2 that can be used for reheating is calculated from the hot water storage temperature in the vicinity of the heat exchanger 18 detected by the hot water storage temperature sensor 33 and the predetermined capacity in the vicinity of the heat exchanger 18 that detects the temperature (S103). At this time, it is even better to calculate the hot water storage heat quantity Q2 that can be used for reheating using the temperature obtained by subtracting the bath temperature from the hot water storage temperature.

  Then, when the amount of stored hot water Q2 that can be used for reheating is sufficient with respect to the amount of heat Q1 required for reheating (Yes in S104), specifically, Q2 / Q1 is a predetermined value (1.5 here). In the case of the above, the hot water supply control unit 38 starts driving the bath circulation pump 20 with a higher output than usual (S105), increases the circulation amount of the bath water flowing into the heat exchanger 18 from the normal amount, and the hot water storage tank 2 The hot water stored in the upper part of the inside and the bathtub water are heat-exchanged to perform a full and powerful chasing operation.

  Then, after starting the powerful chasing operation, it is confirmed whether the hot water storage temperature of the hot water storage tank 2 detected by the hot water storage temperature sensor 33 is lower than a predetermined temperature T4 (here, 70 ° C.) (Yes in S106). The chasing operation is continued until the temperature reaches the target chasing temperature (S107).

  When the bath temperature detected by the bath return temperature sensor 23 reaches the bath setting temperature (Yes in S107), the hot water supply control unit 38 stops driving the bath circulating pump 20 (S108) and ends the reheating operation (S108). S109).

  In addition, when the hot water storage temperature falls below the predetermined temperature T4 during the powerful chasing operation (No in S106), heat cannot be efficiently exchanged in the powerful chasing operation with the increased circulation amount. 20 is driven with a normal output (S110), and the hot water stored in the upper part of the hot water storage tank 2 and the bathtub water are efficiently heat-exchanged to perform a bath reheating operation.

  Then, it is determined that the difference between the temperature detected by the bath temperature sensor 24 and the temperature detected by the bath return temperature sensor 23 is equal to or greater than a predetermined value, and the bath water is heated efficiently (Yes in S111). The chasing operation is continued until the temperature of the bath water reaches the target chasing temperature (S112).

  When the temperature detected by the bath return temperature sensor 23 reaches the reheating target temperature (Yes in S112), the hot water supply control unit 38 stops driving the bath circulating pump 20 (S108) and ends the reheating operation (S108). S109).

  Here, the difference between the temperature detected by the forward temperature sensor 24 and the temperature detected by the return temperature sensor 23 during the reheating operation is less than a predetermined value, and it is determined that the bath water is not efficiently heated. Then (No in S111), the chasing operation is stopped (S113).

  In addition, after starting the reheating operation, there is only a small margin of hot water storage heat amount Q2 that can be used for reheating with respect to the heat amount Q1 necessary for reheating (No in S104). Specifically, Q2 / Q1 is predetermined. When the value (here, 1.2) or more (Yes in S114), the hot water supply control unit 38 starts driving the bath circulation pump 20 with a normal output (S110) and is stored in the upper part of the hot water storage tank 2. The hot water and bath water are exchanged for heat, and the bath is chased.

  Then, it is determined that the difference between the temperature detected by the bath temperature sensor 24 and the temperature detected by the bath return temperature sensor 23 is equal to or greater than a predetermined value, and the bath water is heated efficiently (Yes in S111). The chasing operation is continued until the temperature of the bath water reaches the target chasing temperature (S112).

  When the temperature detected by the bath return temperature sensor 23 reaches the reheating target temperature (Yes in S112), the hot water supply control unit 38 stops driving the bath circulating pump 20 (S108) and ends the reheating operation (S108). S109).

  Here, the difference between the temperature detected by the forward temperature sensor 24 and the temperature detected by the return temperature sensor 23 during the reheating operation is less than a predetermined value, and it is determined that the bath water is not efficiently heated. Then (No in S111), the chasing operation is stopped (S113).

  As described above, when the amount of stored hot water Q2 that can be used for reheating in the hot water storage tank 2 is sufficiently larger than the amount of heat Q1 required for reheating, the bath circulation pump 20 is driven at a higher output than usual. Therefore, it is possible to increase the circulation amount of the bath water to the heat exchanger 18 and to shorten the bathing time.

  Further, after starting a powerful chasing operation, heat exchange of the hot water storage tank 2 detected by the hot water storage temperature sensor 33 due to factors such as heat exchange in the heat exchanger 18 or use of hot water in the hot water storage tank 2 for hot water supply. If it is detected that the hot water storage temperature in the vicinity of the vessel 18 has dropped below the predetermined temperature T2 and it is determined that the amount of hot water stored in the hot water storage tank 2 does not remain sufficient for a powerful chasing operation, the bath circulation pump 20 is Since it is driven to return to normal output from higher output and perform normal reheating operation, it is returned to an appropriate circulation amount for the hot water in the hot water storage tank 2 whose temperature has dropped, and the heat is sufficiently exchanged. High temperature hot water can be returned to the bathtub 6.

  Next, a fifth embodiment of the present invention will be described. Note that the description of the same configuration as that of the previous embodiment 4 is omitted, and the chasing operation will be described based on the flowchart shown in FIG.

  In Example 5, the difference between the temperature detected by the forward temperature sensor 24 and the temperature detected by the return temperature sensor 23 during the powerful chasing operation is less than a predetermined value, and the bath water is efficiently heated. If it is determined that there is no change (No in S115), heat cannot be efficiently exchanged by the powerful reheating operation with the increased circulation amount, so the bath circulation pump 20 is driven at a normal output (S110), and hot water storage The hot water stored in the upper part of the tank 2 and the bathtub water are efficiently heat-exchanged to carry out the bath chasing operation.

  In the fifth embodiment, a hot water storage tank that is detected by the hot water storage temperature sensor 33 due to factors such as heat exchange in the heat exchanger 18 or use of hot water in the hot water storage tank 2 for hot water supply after the start of a powerful chasing operation. The difference between the temperature detected by the forward temperature sensor 24 and the temperature detected by the return temperature sensor 23 is that the hot water storage temperature in the vicinity of the heat exchanger 18 of the second heat exchanger 18 is lowered and the bath water is not efficiently heated. If it is detected that the amount of stored hot water in the hot water storage tank 2 is less than the predetermined value and it is determined that there is not enough heat remaining in the powerful reheating operation, the bath circulation pump 20 is switched from a higher output to a normal output. Since the normal reheating operation is performed, the hot water in the hot water storage tank 2 whose temperature has been lowered is returned to an appropriate circulation amount, and the heat is sufficiently exchanged so that hot water having a high temperature is supplied to the bathtub 6. To return to It is those that can.

  The other operations are the same as in the previous embodiment 4 and will not be described here. However, the amount of stored hot water Q2 that can be used for reheating in the hot water storage tank 2 is sufficiently larger than the amount of heat Q1 required for reheating. When there is, the bath circulation pump 20 is driven at a higher output than usual, so that the amount of bath water circulating to the heat exchanger 18 can be increased and the bath replenishment time can be shortened. Is.

  Next, a sixth embodiment of the present invention will be described. The description of the same configuration as in the first embodiment will be omitted.

  In the sixth embodiment, the chasing switch 37 provided on the remote controller 5 serves as the chasing driving instruction means 43 and the powerful chasing operation instructing means 44. The driving instruction means 43 instructs the start of the normal chasing operation, and the long chasing operation of the chasing switch 37 (here, continuous pressing for 3 seconds or more) causes the powerful chasing driving instruction means 44 to start the powerful chasing operation. It is an instruction.

  Next, the chasing operation of the sixth embodiment will be described based on the flowchart shown in FIG. First, the chasing operation switch 37 of the remote controller 5 is operated, and the ON state is continuously pressed for a predetermined time (here, 3 seconds) or more (Yes in S201), and the powerful chasing operation instructing unit 44 performs powerful chasing operation. Is instructed, the hot water supply control unit 38 starts driving the bath circulation pump 20 at an output higher than normal (S202), and increases the circulation amount of the bath water flowing into the heat exchanger 18 from the normal level. The hot water stored in the upper part of the hot water storage tank 2 and the bathtub water are heat-exchanged to perform a full and powerful chasing operation.

  Then, after the powerful chasing operation is started, it is confirmed whether the hot water temperature of the hot water storage tank 2 detected by the hot water temperature sensor 33 is lower than a predetermined temperature T5 (70 ° C. in this case) at which powerful chasing is possible (S203). Yes), the reheating operation is continued until the bath water temperature reaches the target reheating temperature (S204).

  When the bath temperature detected by the bath return temperature sensor 23 reaches the bath set temperature, the hot water supply control unit 38 stops driving the bath circulating pump 20 (S205) and ends the reheating operation (S206). .

  In addition, when the hot water storage temperature falls below the predetermined temperature T5 during the powerful chasing operation (No in S203), the hot water supply control unit 38 issues a heating operation command to the heat pump control unit 17 and drives the heat pump unit 3. Then, the hot water in the hot water storage tank 2 is taken out from the lower part and heated, and then heated up to return to the upper part of the hot water storage tank 2 (S207). While trying to do a powerful chasing.

  Further, when the reheating operation switch 37 of the remote controller 5 is operated and the ON state is less than or equal to a predetermined time (here, 3 seconds) (No in S201), the reheating operation instructing unit 43 instructs normal reheating operation. In this case, the hot water supply control unit 38 starts driving the bath circulation pump 20 with a normal output (S208), and exchanges heat between the hot water stored in the upper part of the hot water storage tank 2 and the bath water, and performs the bath chasing operation. I do.

  Then, it is determined that the difference between the temperature detected by the bath temperature sensor 24 and the temperature detected by the bath return temperature sensor 23 is equal to or greater than a predetermined value, and the bath water is heated efficiently (Yes in S209), The chasing operation is continued until the temperature of the bath water reaches the target chasing temperature (S210).

  When the temperature detected by the bath return temperature sensor 23 reaches the reheating target temperature (Yes in S210), the hot water supply control unit 38 stops driving the bath circulating pump 20 (S205) and ends the reheating operation (S205). S206).

  Here, the difference between the temperature detected by the forward temperature sensor 24 and the temperature detected by the return temperature sensor 23 during the reheating operation is less than a predetermined value, and it is determined that the bath water is not efficiently heated. Then (No in S209), the chasing operation is stopped (S211).

  In this way, when a powerful reheating operation instruction is given from the remote controller 5, the bath circulation pump 20 is driven at a higher output than usual, so that the circulation amount of the bath water to the heat exchanger 18 is increased. In this way, it is possible to shorten the time required for bathing.

  In the vicinity of the heat exchanger 18 of the hot water storage tank 2 detected by the hot water storage temperature sensor 33 due to factors such as heat exchange in the heat exchanger 18 or use of hot water in the hot water storage tank 2 for hot water supply during a powerful reheating operation. When it is detected that the stored hot water temperature has dropped below the predetermined temperature T5, and it is determined that the amount of stored hot water in the hot water storage tank 2 does not remain sufficient for the powerful chasing operation, the heat pump unit 3 as the heating means is driven. Then, the amount of heat that is not sufficient for the powerful chasing operation is increased and the chasing time is replenished while the chasing time is replenished.

  In addition, since the remote control 5 is provided with the follow-up driving instruction means 43 and the powerful follow-up operation instruction means 44, the user can select the manner of the follow-up operation, which is highly convenient. When the powerful chasing operation instructing means 44 instructs the chasing operation, the user wants to perform chasing in a short time. Therefore, the reheating operation is performed and the reheating can be completed in a short time.

  Next, a seventh embodiment of the present invention will be described. Note that the description of the same configuration as that of the previous embodiment 6 is omitted, and the chasing operation will be described based on the flowchart shown in FIG.

  In the third embodiment, the difference between the temperature detected by the forward temperature sensor 24 and the temperature detected by the return temperature sensor 23 is less than a predetermined value during the powerful chasing operation, and the bath water is efficiently heated. If it is determined that there is no (No in S212), the hot water supply control unit 38 gives a heating operation command to the heat pump control unit 17 and drives the heat pump unit 3 to take out hot water in the hot water storage tank 2 from the lower part and heat it. Then, the reheating operation is performed so as to return to the upper part of the hot water storage tank 2 (S207), and the reheating operation is performed while the amount of heat that is insufficient for the powerful reheating operation is replenished and replenished by the operation.

  Since the other operations are the same as those in the sixth embodiment, the description thereof will be omitted. However, the chasing switch 37 is long pressed by the user and the powerful chasing operation instructing unit 44 starts the chasing operation. When instructed, the bath circulation pump 20 is driven at a higher output than usual, and the circulation amount of the bath water to the heat exchanger 18 can be increased to shorten the bath replenishment time.

  In the first to fifth embodiments, when changing from the powerful chasing operation to the ordinary chasing operation, it is even better to notify the remote controller 5 by voice or text that the operation has shifted to the ordinary chasing operation due to insufficient heat. Further, in Examples 6 to 7, it is even better to notify the remote controller 5 by voice or text that the boiling operation has been started during the powerful chasing operation.

  In the first to seventh embodiments, the start condition of the reheating operation is determined based on the detected temperature of the hot water storage temperature sensor 33b close to the heat exchanger 18, but the detected temperature of the hot water storage temperature sensor 33a is taken in or The amount of heat of the entire tank 2 may be taken into judgment.

  Moreover, in Examples 1-7, although the heat exchanger 18 was arrange | positioned in the hot water storage tank 2, it is not restricted to this, The heat exchanger 18 is arrange | positioned out of the hot water storage tank 2, and hot water storage hot water is circulated to the heat exchanger 18. It is also good as a method of making it. Further, the heat pump type is adopted as means for heating the hot water storage, but the present invention is not limited to this, and an electric heater may be disposed in the hot water storage tank 2.

  Further, in the sixth to seventh embodiments, the chasing operation instructing unit 43 and the powerful chasing operation instructing unit 44 are combined with one chasing switch 37. However, the present invention is not limited to this. For example, a powerful chasing switch ( (Not shown) may be provided independently, or it may be set whether normal replenishment or powerful replenishment is performed when the retreat switch 37 is operated by the main body DIP switch.

The schematic block diagram of the hot water storage type hot-water supply apparatus of Examples 1-7 of this invention. FIG. 3 is a flowchart for explaining a chasing operation according to the first embodiment. FIG. 9 is a flowchart for explaining a chasing operation according to the second embodiment. 9 is a flowchart for explaining a chasing operation according to the third embodiment. 10 is a flowchart for explaining a chasing operation according to the fourth embodiment. 10 is a flowchart for explaining a chasing operation according to the fifth embodiment. 10 is a flowchart for explaining a chasing operation according to the sixth embodiment. 10 is a flowchart for explaining a chasing operation according to the seventh embodiment.

Explanation of symbols

2 Hot water storage tank 3 Heat pump unit (heating means)
6 Bath 18 Heat exchanger 20 Bath circulation pump 22 Bath circulation circuit 23 Bath return temperature sensor 24 Bath temperature sensor 33 Hot water storage temperature sensor 37 (43, 44) Reheating switch

Claims (11)

  A hot water storage tank for storing hot water, a hot water storage temperature sensor for detecting the hot water temperature of the hot water storage tank, a bath circulation circuit having a bath circulation pump for circulating hot water in the bathtub, and the bath water provided in the bath circulation circuit in the middle In the hot water storage type hot water supply apparatus provided with a heat exchanger for heating with hot water stored in a hot water storage tank, driving the bath circulation pump to circulate the bath water to the heat exchanger and replenishing operation, During reheating operation, when the hot water storage heat amount based on the hot water storage temperature detected by the hot water storage temperature sensor is equal to or higher than a predetermined heat amount, the bath circulation pump is driven at a higher output than usual to perform powerful reheating operation. A hot water storage type hot water supply device characterized by that.   A hot water storage tank for storing hot water, a hot water storage temperature sensor for detecting the hot water temperature of the hot water storage tank, a bath circulation circuit having a bath circulation pump for circulating hot water in the bathtub, and the bath water provided in the bath circulation circuit in the middle In the hot water storage type hot water supply apparatus provided with a heat exchanger for heating with hot water stored in a hot water storage tank, driving the bath circulation pump to circulate the bath water to the heat exchanger and replenishing operation, When the hot water storage temperature detected by the hot water storage temperature sensor is equal to or higher than the predetermined temperature T1 and lower than the predetermined temperature T2 higher than the predetermined temperature T1, during the reheating operation, the bath circulation pump is driven with a normal output to reheat. When the hot water storage temperature detected by the hot water storage temperature sensor is equal to or higher than the predetermined temperature T2, the bath circulation pump is driven at a higher output than usual and powerful. Hot water storage type water heater, characterized in that to perform the have firing operation.   3. The reheating operation is performed by driving the bath circulation pump with a normal output when the hot water storage temperature detected by the hot water storage temperature sensor falls below the predetermined temperature T2 during the powerful reheating operation. The hot water storage type hot water supply apparatus described.   When the hot water storage temperature detected by the hot water storage temperature sensor falls below the predetermined temperature T3 lower than the predetermined temperature T2 and higher than the predetermined temperature T1 during the powerful chasing operation, the bath circulation pump is driven with a normal output to follow it. The hot water storage type hot water supply apparatus according to claim 2, wherein the hot water operation is performed.   A bath temperature sensor is provided on the upstream side of the heat exchanger in the bath circulation circuit, and a bath temperature sensor is provided on the downstream side, and the temperature detected by the bath temperature sensor and the bath temperature are detected during a powerful chasing operation. The hot water storage type hot water supply apparatus according to claim 2, wherein when the difference in temperature detected by the sensor is equal to or less than a predetermined value, the recirculation pump is driven at a normal output to perform a reheating operation.   A hot water storage tank for storing hot water, a hot water storage temperature sensor for detecting the hot water storage temperature of the hot water storage tank, a bath circulation circuit having a bath circulation pump for circulating hot water in the bathtub, and the bath water provided in the middle of the bath circulation circuit A heat exchanger for heating with hot water stored in a hot water storage tank; and a bath return temperature sensor provided on the upstream side of the heat exchanger of the bath circulation circuit, and driving the bath circulation pump to supply bath water. In the hot water storage type hot water supply apparatus that is circulated through the heat exchanger and is reheated, the amount of heat Q1 required for reheating is calculated based on the bath temperature detected by the bath return temperature sensor during the reheating operation. Based on the hot water storage heat quantity Q2 that can be used for reheating calculated based on the hot water storage temperature detected by the hot water storage temperature sensor, the bath circulation pump can be operated at a higher output than usual. Hot water storage type water heater, characterized in that the determination as to whether or not to perform powerful reheating operation for moving.   7. The chasing operation is performed by driving the bath circulation pump at a normal output when the hot water temperature detected by the hot water temperature sensor decreases to a predetermined temperature T4 or lower during the powerful chasing operation. Hot water storage system.   A tread temperature sensor is provided on the downstream side of the heat exchanger in the bottom circulation circuit, and the difference between the temperature detected by the tread temperature sensor and the temperature detected by the tread return temperature sensor during a powerful reheating operation is predetermined. The hot water storage type hot water supply apparatus according to claim 6, wherein if the value is less than the value, the bath circulation pump is driven at a normal output to perform a reheating operation.   A hot water storage tank for storing hot water, a heating means for heating the hot water in the hot water storage tank, a hot water temperature sensor for detecting the hot water temperature of the hot water storage tank, and a bath circulation circuit for circulating hot water in the bathtub provided with a bath circulation pump And a heat exchanger that is provided in the middle of the bath circulation circuit and heats the bath water with hot water stored in the hot water storage tank, and a remote controller that is remotely operated, and drives the bath circulation pump to heat the bath water to the heat. In a hot water storage type hot water supply apparatus that is circulated through an exchanger to perform a chasing operation, the remote control is provided with chasing operation instruction means and powerful chasing operation instruction means, and the powerful chasing operation instruction means provides powerful chasing operation. When the instruction is received, the above-mentioned circulation pump is driven at a higher output than that in the chasing operation to perform the chasing operation. Hot water storage type water heater, characterized in that.   The hot water storage type hot water supply apparatus according to claim 9, wherein, when the hot water storage temperature detected by the hot water storage temperature sensor detects a temperature equal to or lower than a predetermined temperature T5 during the powerful chasing operation, the heating means is operated.   A bath temperature sensor is provided on the upstream side of the heat exchanger of the bath circulation circuit, and a bath temperature sensor is provided on the downstream side. During the powerful chasing operation, the temperature detected by the bath temperature sensor and the bath return The hot water storage type hot water supply apparatus according to claim 9, wherein the heating means is operated when a difference in temperature detected by the temperature sensor is equal to or less than a predetermined value.

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