JP5334609B2 - Hot water storage water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage type water heater capable of easily preventing running-out of hot water in supplying hot water into a bathtub or taking a bath. <P>SOLUTION: In constituting this storage type water heater 150 used in at least one of hot water supply to supply hot water stored in a hot water storage tank 20 to the bathtub 180 and reheating the bath water 180a in the bathtub, a control device 130 is disposed to allow a heat source machine to additionally boil up the hot water while applying a second hot water remaining amount more than a first hot water remaining amount, as a boiling-up target value, when the amount of remaining hot water in the hot water storage tank becomes less than the first hot water remaining amount, during a time when a predetermined additional boiling-up schedule time passes from the start of hot water supply to the bathtub or the start of reheating of the bathtub water. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a hot water storage type water heater.

  In a hot water storage type hot water heater that stores hot water boiled by a heat source device such as a heater or a heat pump unit in a hot water storage tank and supplies hot water to a desired hot water supply destination in general, the amount expected to be used within 24 hours The hot water is boiled in the late-night hours (low-night power hours) when the electricity rate is cheap and stored in the hot water storage tank, and then the hot water in the hot water storage tank is used for hot water supply. For this reason, when consumption of hot water exceeding the expected amount is demanded, there is inevitably a shortage of hot water.

  Since the electricity charge in the daytime hours is higher than the electricity charge in the midnight electricity hours, it is desirable to avoid as much as possible the situation where a “hot water shortage” that runs out of hot water in the hot water storage tank occurs in the daytime hours. Even if hot water is boiled excessively, running cost increases. For this reason, for example, in the hot water storage type water heater (hot water supply device) described in Patent Document 1, the amount of heat corresponding to the amount of hot water supplied (used) from the hot water storage tank is calculated over a certain period, and based on the amount of heat. Obtain the target boiling heat amount per day, and calculate the time required for additional boiling increase to be performed during the daytime hours from the difference between the boiling target heat amount at the end of the midnight power hours and the actual heat storage amount in the hot water storage tank However, additional boiling is increased during this daytime. In addition, when the shortage of hot water is predicted, the shortage is increased.

JP 2002-168524 A

  However, the amount of hot water consumed by the user varies from day to day, and especially on days when there are many bath users. In the hot water storage type hot water heater described in Patent Document 1, the amount of heat corresponding to the amount of hot water supplied from the hot water storage tank is calculated over a certain period of time as in the hot water storage type hot water heater, and the heating target heat amount per day is calculated. However, if the number of bath users on the day is greater than the previous day, the amount of heat used during bathing and bathing in the bathtub exceeds the above-mentioned boiling target heat amount, so It is easy to happen. In addition, in a hot water storage type water heater that can replenish the bath water in the bathtub by heat exchange using the hot water in the hot water storage tank as a heat source, the amount of heat used during reheating and bathing is the above boiling point. Hot water is likely to run out of the target heat amount.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hot water storage type hot water heater that can easily prevent running out of hot water when filling a bathtub or bathing.

  The hot water storage type water heater of the present invention includes a hot water storage tank, a heat source device for boiling hot water stored in the hot water storage tank into hot water, a remaining hot water amount detection unit that is attached to the hot water storage tank and detects the remaining hot water amount in the hot water storage tank, A control device that controls the heat source unit based on the detection result of the remaining hot water amount detection unit, and a remote controller that functions as an input device for the control device, and hot water stored in the hot water storage tank is filled into the bathtub and bathed in the bathtub. A hot water storage type water heater that can be used for at least one of water replenishment, the control device until a predetermined additional boiling scheduled time elapses from the start of hot water supply to the bathtub or the start of reheating bath water When the remaining hot water amount becomes less than the first remaining hot water amount, the heat source machine is caused to perform additional boiling of the hot water with the second remaining hot water amount larger than the first remaining hot water amount as a boiling target value. It is characterized by that.

  In the hot water storage type water heater of the present invention, when the remaining hot water amount is less than the first remaining hot water amount until the predetermined additional boiling scheduled time elapses from the start of hot water supply to the bathtub or the start of reheating bath water, Since additional boiling of hot water is started by the heat source machine, it is possible to easily prevent hot water from running out when filling the bath or taking a bath by appropriately setting the additional boiling scheduled time.

FIG. 1 is a schematic view showing an example of a hot water storage type hot water supply apparatus of the present invention. FIG. 2 is a block diagram schematically showing a control device in the hot water storage type water heater shown in FIG. FIG. 3 is a flowchart schematically showing an example of control related to the additional boiling operation in the hot water storage type hot water supply machine shown in FIG. FIG. 4 shows an additional boiling operation in the hot water storage type water heater of the present invention, which is configured to perform an additional boiling operation whenever necessary when the detection result of the remaining hot water amount detection unit becomes less than the condition value. It is a flowchart which shows roughly an example of the control which concerns on. FIG. 5 is a block diagram schematically showing an example of a boiling control unit in a hot water storage type water heater that controls the additional boiling operation using the remaining boiling time as a parameter in the hot water storage type water heater of the present invention. is there. FIG. 6 is a flowchart schematically showing an example of a control procedure for controlling the additional boiling operation using the remaining boiling time as a parameter in the hot water storage type water heater of the present invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a hot water storage type water heater of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following form.

Embodiment 1 FIG.
FIG. 1 is a schematic view showing an example of a hot water storage type hot water supply apparatus of the present invention. A hot water storage type water heater 150 shown in FIG. 1 has a function of storing hot water boiled by a heat source machine in a hot water storage tank and supplying hot water to a general hot water supply destination 170 and a bathtub 180 from here. And a water heater main body 140 and a remote controller 145. The “general hot water supply destination” means a hot water supply destination that is opened when the user operates the hot water tap (including a case where the sensor is responsive). Hereinafter, each component of the hot water storage type water heater 150 will be described.

  The heat pump unit 10 includes a compressor that compresses refrigerant, a heat exchanger for boiling corresponding to a radiator, an expansion valve, an evaporator, and a circulation pipe that connects these in an annular shape. (Not shown), and operates under the control of the control device 100 described later to function as a heat source machine. In the above refrigeration cycle section, a refrigerant such as carbon dioxide is compressed by a compressor to become a high temperature and high pressure, then dissipated heat by a heat exchanger for boiling, depressurized by an expansion valve, and absorbed by an evaporator to be in a gas state And is sucked into the compressor.

  On the other hand, the water heater main body 140 includes a hot water storage tank 20, a remaining hot water amount detection unit 25, a water supply pipe 40, a hot water circulation pipe 50, a hot water supply pipe 60, a general hot water mixing valve 65, a bath hot water mixing valve 70, and a general hot water supply. It has a pipe 80, a hot water supply pipe 90 for a bath, a tank-side circulation pipe 100, a reheating heat exchanger 110, a bath-side circulation pipe 120, a control device 130, and the like.

  The hot water storage tank 20 is a stacked hot water storage tank that stores water supplied from the water supply pipe 40 and also stores hot water boiled by the heat pump unit 10. The return pipe 50a of the hot water circulation pipe 50 is connected to the return pipe 50b of the hot water storage circulation pipe 50 and the hot water supply pipe 60, respectively. The hot water storage tank 20 is always kept in a full state by supplying water from the water supply pipe 40.

  A tank temperature sensor 23 for detecting the temperature of hot water flowing from the hot water storage tank 20 into the hot water supply pipe 60 is attached to the upper part of the hot water storage tank 20. Further, first to fourth boiling temperature sensors 25a to 25d for detecting the temperature of the hot water in the hot water storage tank 20 are attached to the peripheral surface portion of the hot water storage tank 20 with different mounting heights. The forward pipe 50a of the path 50 is provided with a fifth boiling temperature sensor 25e that detects the temperature of hot water in the forward pipe 50a.

  Of the first to fifth boiling temperature sensors 25a to 25e, the first to fourth boiling temperature sensors 25a to 25d are used when the amount of hot water is accumulated from the inner top of the hot water storage tank 20 to the lower side. The hot water storage amount (remaining hot water amount) is disposed at a location corresponding to a predetermined amount, for example, at a location corresponding to 15 liters, 50 liters, 100 liters, and 150 liters. If the temperature detected by the third boiling temperature sensor 25c is 90 ° C., hot water of 90 ° C. or higher is stored in the hot water storage tank 20 by the amount of hot water corresponding to the third boiling temperature sensor 25c (100 liters in the above example). Will be. The fifth boiling temperature sensor 25e is provided in the forward pipe 50a of the hot water storage circulation line 50. If the detected temperature of the fifth boiling temperature sensor 25e is, for example, 46 ° C. or more, the hot water storage tank 20 Almost all of this is hot water. Accordingly, the first to fourth boiling temperature sensors 25 a to 25 d also function as the remaining hot water amount detection unit 25 that detects the remaining hot water amount in the hot water storage tank 20.

  The water supply conduit 40 is a conduit for supplying water such as city water to the hot water storage tank 20, the general hot water mixing valve 65, the bath hot water mixing valve 70, and the general hot water supply destination 170, and includes a pressure reducing valve 33, a water temperature sensor 35, It has the 1st water supply pipe part 40a and the 2nd water supply pipe part 40b. The pressure reducing valve 33 is provided in the middle of the 1st water supply pipe part 40a, and reduces the water pressure from water sources (not shown), such as a water supply, to a predetermined value. The water supply temperature sensor 35 is provided in the 2nd water supply pipe part 40b, and detects the temperature of the water in this 2nd water supply pipe part 40b. The first water supply pipe section 40a connects the water source and the hot water storage tank 20, and the second water supply pipe section 40b is separated from the first water supply pipe section 40a on the downstream side of the pressure reducing valve 33, and the first water supply pipe section 40a and the general hot water supply. Each of the mixing valve 65 and the bath / hot water mixing valve 70 is connected.

  The hot water storage circulation line 50 is a pipe line that reaches the upper part of the hot water storage tank 20 from the lower part of the hot water storage tank 20 via the boiling heat exchanger in the heat pump unit 10, and includes a hot water storage water pump 45 and an outgoing pipe 50a. And a return pipe 50b. The hot water storage water supply pump 45 is provided in the forward pipe 50a, and the forward pipe 50a connects the lower part of the hot water storage tank 20 to the boiling heat exchanger. The return pipe 50 b connects the boiling heat exchanger and the upper part of the hot water storage tank 20.

  The hot water supply pipe 60 has a hot water supply side connected to the upper part of the hot water storage tank 20, one flow path on the bifurcated hot water supply side connected to the general hot water supply mixing valve 65, and the other flow path connected to the bath hot water supply mixing valve 70. Then, the hot water in the hot water storage tank 20 is guided to the general hot water mixing valve 65 and the bath hot water mixing valve 70.

  The general hot water supply mixing valve 65 is an electric valve, the opening degree of which is adjusted by the control device 130, and the water supplied from the second water supply pipe section 40b and the hot water supplied from the hot water supply pipe line 60 are mixed at a predetermined level. Mix under the ratio. Similarly, the bath / hot water mixing valve 70 is also an electric valve, and its opening degree is adjusted by the control device 130 to supply water supplied from the second water supply pipe section 40b and hot water supplied from the hot water supply pipe 60. Mix under a predetermined mixing ratio. These general hot water mixing valve 65 and bath hot water mixing valve 70 only need to be able to control the opening degree separately from each other by control device 130, and the structure thereof can be selected as appropriate, such as an integral type or an independent type. is there.

  The general hot water supply pipe 80 has a general flow sensor 73 and a general temperature sensor 75, and connects the general hot water mixing valve 65 and the general hot water supply destination 170. The general flow sensor 73 detects the flow rate in the general hot water supply pipe 80, and the general temperature sensor 75 detects the temperature of the hot water in the general hot water supply pipe 80. In the illustrated example, a general temperature sensor 75 is provided on the downstream side of the general flow sensor 73.

  The bath hot water supply line 90 includes an electromagnetic valve 83, a bath flow sensor 85, and a bath temperature sensor 87. The bath hot water mixing valve 70 and the return pipe 120b of the recirculation circulation line 120 Connect. The solenoid valve 83 is adjusted in opening degree by the control device 130 to adjust the flow rate in the hot water supply pipeline 90 for bath, and the flow sensor 85 for bath detects the flow rate in the hot water supply pipeline 90 for bath to detect the bath temperature. The sensor 87 detects the temperature of the hot water near the junction of the hot water supply pipe 90 for the bath and the return pipe 120b. In the illustrated example, an electromagnetic valve 83, a bath flow sensor 85, and a bath temperature sensor 87 are provided in this order from the bath / hot water mixing valve 70 side.

  The tank-side circulation pipe 100 is a pipe that reaches the lower part of the hot water storage tank 20 from the upper part of the hot water storage tank 20 via the reheating heat exchanger 110, and includes a tank-side water supply pump 95, an outgoing pipe 100a, and a return pipe. Tube 100b. The tank side water pump 95 is provided in the return pipe 100b. The forward pipe 100 a connects the upper part of the hot water storage tank 20 and the upper part of the reheating heat exchanger 110, and the return pipe 100 b connects the lower part of the reheating heat exchanger 110 and the lower part of the hot water storage tank 20.

  The reheating heat exchanger 110 functions as a heat source device for replenishing the bath water 180 a in the bathtub 180, and hot water flowing through the tank side circulation line 100 and bath water 180 a flowing through the bath side circulation line 120. The bath water 180a is heated by exchanging heat. For example, a plate-type water-water heat exchanger in which a plurality of heat transfer plates (not shown) are stacked in the height direction is used as the reheating heat exchanger 110.

  The bath-side circulation conduit 120 is a conduit that returns from the bathtub 180 to the bathtub 180 again through the reheating heat exchanger 110, and includes a bath water temperature sensor 113, a bath-side water supply pump 115, an outgoing pipe 120a, and A return pipe 120b is provided. The bath water temperature sensor 113 is provided in the forward pipe 120a and detects the temperature of the bath water 180a in the forward pipe 120a. A bath-side water pump 115 is also provided in the forward pipe 120a. The forward pipe 120 a connects the bathtub 180 and the lower part of the heating heat exchanger 110, and the return pipe 120 b connects the upper part of the heating heat exchanger 110 and the bathtub 180. A bathtub adapter 175 is attached in the bathtub 180, and each of the forward pipe 120a and the return pipe 120b is connected to the bathtub adapter 175.

  The control device 130 receives the command or information received from the remote controller 145, the tank temperature sensor 23, the first to fifth boiling temperature sensors 23a to 23e, the feed water temperature sensor 35, the general flow sensor 73, and the general temperature sensor 75. Depending on the detection result of the bath flow sensor 85, the bath temperature sensor 87, or the bath water temperature sensor 113, the heat pump unit 10, the hot water storage water pump 45, the general hot water mixing valve 65, the bath hot water mixing valve 70, The operation of the electromagnetic valve 83, the tank-side water pump 95, or the bath-side water pump 115 is controlled.

  Of the above-described components constituting the water heater main body 140, the remaining components excluding the water supply conduit 40, the hot water storage circulation conduit 50, the general hot water supply conduit 80, and the bath hot water supply conduit 90, respectively, It is stored in an outer case 135. A part of each of the water supply pipe 40, the hot water storage circulation pipe 50, the general hot water supply pipe 80, and the bath hot water supply pipe 90 extends to the outside of the exterior case 135.

  The remote controller 145 is configured using an operation unit (not shown) including a plurality of input switches and a flat display panel such as a liquid crystal display panel, and commands and information input from the operation unit, and the control device 130. Provided with a display unit (not shown) for visually displaying information such as driving conditions received from characters, figures, characters, etc., and a notification unit (not shown) for announcement of messages, reproduction of warning sounds, etc. Yes. The remote controller 145 is wired or wirelessly connected to the control device 130 to communicate with the control device 130 and functions as an input device of the control device 130. In the illustrated example, only one remote controller 145 is connected to the control device 130, but one or more desired number of remote controllers can be connected to the control device 130. The remote controller 145 can be installed in a desired place such as a kitchen or a bathroom.

  The hot water storage type hot water heater 150 having the above-described components supplies water to the hot water storage tank 20 from the water supply pipe 40 and supplies the hot water storage tank 20, hot water circulation pipe 50, hot water supply pipe 60, and general hot water supply pipe 80. The hot water supply line 90 for the bath and the circulation line 100 for the tank side are used after being filled with water, the water is heated in the hot water storage tank 20 to the hot water, and the water supply tank 170 is heated to the general hot water supply destination 170. A hot water supply operation, a hot water supply operation to the bathtub 180, or a chasing operation of the bath water 180a is appropriately performed.

  A boiling operation (hereinafter referred to as “normal boiling operation”) for boiling an amount of hot water expected to be consumed in one day (within 24 hours from the start of boiling water) at one time is, for example, When a boiling start command is input from the remote controller 145 or when the boiling start time input by the user from the remote controller 145 is reached, the heat pump unit 10 and the hot water storage water pump 45 are activated and started under the control of the control device 130. Is done. Further, the boiling operation for preventing hot water shortage (hereinafter referred to as “additional boiling operation”) is started when the amount of remaining hot water in the hot water storage tank 20 becomes less than the condition value. The user inputs in advance information related to the desired boiling temperature, amount of boiling water, and the above condition values from the remote controller 145.

  When the normal boiling operation is started, the control device 130 monitors the detection temperature of a predetermined boiling temperature sensor corresponding to the amount of boiling water, and when the detected temperature becomes equal to or higher than the predetermined temperature, the control device 130 exceeds the amount of boiling water. It is determined that the hot water is stored in the hot water storage tank 20, and the normal boiling operation is stopped. The additional boiling operation is terminated when a predetermined termination condition is satisfied, as will be described later. During the boiling operation, water flows from the lower part of the hot water storage tank 20 into the forward pipe 50a of the hot water storage circulation line 50, and is passed through the boiling heat exchanger in the heat pump unit 10 to the boiling water. Boiled in hot water with a heat exchanger for raising. Hot water boiled by the boiling heat exchanger is returned to the hot water storage tank 20 from the upper part of the hot water storage tank 20 through the return pipe 50b of the hot water storage circulation line 50.

  On the other hand, the hot water supply operation to the general hot water supply 170 is performed by the control device 130 when the user opens the general hot water supply 170 and the general flow sensor 73 detects a water flow of a predetermined flow rate (for example, 1.5 liters / minute) or more. Started under control. In the hot water supply operation, the control device 130 controls the general hot water mixing valve 65 based on the temperature detected by the tank temperature sensor 23, the temperature detected by the water temperature sensor 35, and the information related to the hot water set temperature input from the remote controller 145 by the user. The opening ratio (opening ratio on the hot water supply pipe line 60 side and opening ratio on the second water supply pipe part 40b side) is adjusted, and the mixing ratio of hot water from the hot water supply pipe line 60 and water from the second water supply pipe part 40b is adjusted. Adjust.

  Then, based on the temperature detected by general temperature sensor 75, control device 130 repeatedly feedback-controls the opening degree of general hot water supply mixing valve 65, and adjusts the hot water supply temperature at general hot water supply point 170 to the temperature set by the user. The hot water supply operation to the general hot water supply destination 170 is stopped when the user closes the general hot water supply destination 170 and the general flow sensor 73 no longer detects a water flow exceeding the predetermined flow rate.

  The hot water supply operation to the bathtub 180 is performed when the user inputs a command related to hot water supply to the bathtub 180 such as a hot water start command, a hot water command, and an additional hot water command from the remote controller 145. It starts with an open command. In the hot water supply operation, control is performed based on temperature information such as the temperature detected by the tank temperature sensor 23, the temperature detected by the water temperature sensor 35, and the hot water temperature, hot water temperature, additional hot water temperature, and the like input from the remote controller 145 by the user. The apparatus 130 adjusts the opening of the bath / hot water mixing valve 70 (the opening of the hot water supply pipe 60 and the opening of the second water supply pipe 40b), so that the hot water and the second water supply from the hot water supply pipe 60 are adjusted. The mixing ratio with water from the tube portion 40b is adjusted.

  Then, based on the temperature detected by bath temperature sensor 87, control device 130 repeatedly feedback-controls the opening degree of bath / hot water mixing valve 70, and adjusts the hot water temperature to bathtub 180 to the set temperature of the user. The hot water supply operation to the bathtub 180 is a command for instructing the hot water supply to the bathtub 180 from the remote controller 145 when the detection result of the bath flow sensor 85 reaches the amount of hot water, the amount of hot water, or the amount of hot water. Is input, the control device 130 issues a close command to the electromagnetic valve 83 and stops. Hot water supply amount information such as the amount of hot water, hot water, and additional hot water is input in advance by the user from the remote controller 145.

  When the user inputs a chasing start command from the remote controller 145, the tank-side water pump 95 and the bath-side water pump 115 are started and started under the control of the control device 130. Hot water stored in the hot water storage tank 20 flows into the forward pipe 100a of the tank side circulation pipe 100, while the bath water 180a in the bathtub 180 flows into the forward pipe 120a of the bath side circulation pipe 120, and the tank side circulation. Heat is exchanged between the hot water flowing through the pipe line 100 and the bath water 180a flowing through the bath-side circulation pipe line 120 by the reheating heat exchanger 110. As a result, the bath water 180 a flowing through the bath side circulation pipe 120 is heated, and the heated bath water 180 a is returned to the bathtub 180 from the return pipe 120 b of the bath side circulation pipe 120.

  During this time, based on the detection results of the bath temperature sensor 87 and the bath water temperature sensor 113, the water supply amounts of the tank side water pump 95 and the bath side water pump 115 are controlled by the control device 130, and the bath water temperature sensor 113 detects. If it is determined from the results that the bath water 180a in the bathtub 180 has been heated to a predetermined temperature, the chasing operation ends.

  The hot water storage type water heater 150 that performs the normal boiling operation, the additional boiling operation, the hot water supply operation, and the reheating operation as described above is characterized by the control related to the additional boiling operation. The configuration of the device 130 and the control related to the additional boiling operation will be described in detail with reference to FIG. 2 or FIG.

  FIG. 2 is a block diagram schematically showing a control device in the hot water storage type water heater shown in FIG. As shown in the figure, the control device 130 of the hot water storage type hot water heater 150 (see FIG. 1) includes a transmission / reception processing unit 121, a control unit 125, and a storage unit 127.

  The transmission / reception processing unit 121 includes processing related to transmission of a command to the heat pump unit 10 (see FIG. 1), processing related to reception and distribution of commands and information from the remote controller 145 (see FIG. 1), and remote controller 145. Processing related to transmission of information (for example, driving status) to the user is performed.

  The control unit 125 performs normal boiling operation, additional boiling operation, based on commands and information from the remote controller 145 distributed by the transmission / reception processing unit 121, and detection results of each sensor constituting the hot water storage type water heater 150, The hot water supply operation and the chasing operation are comprehensively controlled. Further, based on the detection results of the sensors, information related to the operation status of the hot water storage hot water heater 150 is collected, the operation of the transmission / reception processing unit 121 is controlled, and the information is transmitted to the remote controller 145. In order to perform these processes, the control unit 125 includes a boiling control unit 122, a hot water supply control unit 123, and a reheating control unit 124.

  The above boiling control unit 122 has each information related to the boiling start time, the boiling temperature, and the amount of boiling water in the normal boiling operation that is input by the user from the remote controller 145 and distributed by the transmission / reception processing unit 121. Is stored in the storage unit 127. Further, information related to the additional boiling operation input by the user from the remote controller 145 and distributed by the transmission / reception processing unit 121, specifically, the amount of remaining hot water that triggers the start of the additional boiling operation, additional boiling described later Information related to the scheduled time and each information related to the target boiling water amount (target remaining hot water amount) for the additional boiling operation are stored in the storage unit 127.

  In addition to letting the user input from the remote controller 145, the remaining hot water amount that triggers the start of the additional boiling operation, information on the scheduled additional boiling time, and the target boiling water amount of the additional boiling operation, The manufacturer of the hot water storage type hot water supply device 150 may be determined in advance and stored in the storage unit 127. Furthermore, the number of people on the day of the hot water storage hot water heater 150 (especially the number of people who plan to use the bathtub 180 (see FIG. 1)) and the amount of hot water desired by the user (eg, “large”, “small”, “automatic”, etc.) ), And when the user inputs the number of users of the day and the desired amount of hot water from the remote controller 145, the amount of remaining hot water that triggers the additional boiling operation, the additional boiling scheduled time, and The hot water storage type hot water supply device 150 may be configured so that the boiling control unit 122 automatically sets the target boiling water amount. Constructing the hot water storage type water heater 150 in this way increases its convenience.

  The boiling control unit 122 that stores the above-described information in the storage unit 127 includes information on the boiling start time, the boiling temperature, and the amount of boiling water in the normal boiling operation, and the first to fifth boiling temperatures. The above-described normal boiling operation is controlled using the detected temperature of any of the sensors 25a to 25e (see FIG. 1). Which one of the first to fifth boiling temperature sensors 25a to 25e uses the detected temperature depends on the amount of hot water stored (the amount of remaining hot water) corresponding to each of the first to fifth boiling temperature sensors 25a to 25e. In accordance with the amount of boiling water during the normal boiling operation, for example, the boiling control unit 125 selects appropriately. In the storage unit 127, information on the amount of hot water stored corresponding to each of the first to fifth boiling temperature sensors 25a to 25e is stored in advance by the manufacturer of the hot water storage type water heater 150.

  Further, the remaining hot water amount that triggers the start of the additional boiling operation, information on the scheduled additional boiling time, information on the target boiling water amount in the additional boiling operation, and the remaining hot water amount detection unit 25 (see FIG. 1). The above-described additional boiling operation is controlled using the detection result, the information related to the presence or absence of hot water supply to the bathtub 180, and the information related to the presence or absence of the reheating operation. The boiling controller 122 has a function of measuring the additional boiling scheduled time by using, for example, a counter. The hot water supply control unit 123 sends a predetermined signal to the boiling control unit 122 when performing a hot water supply operation to the bathtub 180, and the reheating control unit 124 sends a predetermined signal when performing the reheating operation. 122. When any of these signals is received, the boiling control unit 122 starts measuring the additional boiling scheduled time.

  On the other hand, the hot water supply control unit 123 stores, in the storage unit 127, information related to the hot water supply set temperature at the general hot water supply destination 170 (see FIG. 1) input by the user from the remote controller 145 and distributed by the transmission / reception processing unit 121. Using the information and the detection results of the general flow sensor 73 and the general temperature sensor 75 (see FIG. 1), the hot water supply operation to the general hot water supply destination 170 is controlled. Further, the storage unit 127 stores each information related to the hot water temperature, the hot water amount, the hot water temperature, the added hot water temperature, etc., which is input by the user from the remote controller 145 and distributed by the transmission / reception processing unit 121. The bath water flow sensor 85 and the detection results of the bath temperature sensor 87 are used to control hot water supply (hot water, hot water, additional hot water, etc.) operation to the bathtub 180. Furthermore, the operation of the transmission / reception processing unit 121 is controlled to transmit information related to the hot water condition to the remote controller 145.

  The tracking control unit 124 stores, in the storage unit 127, information related to the tracking temperature input by the user from the remote controller 145 and distributed by the transmission / reception processing unit 121. Then, using the information and the detection results of the bath temperature sensor 87 and the bath water temperature sensor 113, the chasing operation described above is controlled. Furthermore, the operation of the transmission / reception processing unit 121 is controlled to transmit information related to the chasing status to the remote controller 145.

  FIG. 3 is a flowchart schematically showing an example of control related to the additional boiling operation in the hot water storage type hot water supply machine shown in FIG. Hereinafter, the reference numerals used in FIG. 1 or FIG.

  In step S11 performed first, the boiling control unit 122 determines whether the filling of the bath 180 or the replenishment of the bath water 180a (see FIG. 1) has been started. If it is determined in step S11 that neither hot water filling nor chasing has been started, step S11 is repeated. If it is determined that hot water pouring or chasing has been started, the process proceeds to step S12.

At step S12, after with additional boiling up expected time T ₁ boiling up control unit 122 sets, and the value of the counter for measuring a T ₁ the additional boiling up schedule time is set to an initial value "00", clocking To start. For example, when there are four persons scheduled to bathe, the additional boiling scheduled time T ₁ is about 100 minutes assuming that the time required for filling the bathtub 180 (filling time) is about 20 minutes and the bathing time per person is about 20 minutes. Set to about minutes.

Next, in step S13, the boiling control unit 122 sets the boiling increase flag to a predetermined value. In the illustrated example, the boiling increase flag is set to “1” in step S13. The boiling increase flag defines the boiling start condition and the target boiling hot water amount in the additional boiling operation, and is detected by the remaining hot water detection unit 25 (see FIG. 1) when the boiling increase flag is “1”. When the amount of remaining hot water is less than the first remaining hot water amount (for example, 150 liters), the additional boiling operation is started, and the second remaining hot water amount (for example, in the hot water storage tank) is larger than the first remaining hot water amount. The total amount of water) as the target boiling water value. Further, when the boiling increase flag is “0”, a third remaining hot water amount in which the remaining hot water amount detected by the remaining hot water amount detection unit 25 after the elapse of the additional boiling scheduled time T ₁ is smaller than the first remaining hot water amount. When it becomes less than (for example, 50 liters), the additional boiling operation is started, and the fourth remaining hot water amount (for example, 100 liters) larger than the third remaining hot water amount is set as the target boiling water amount. The second remaining hot water amount and the fourth remaining hot water amount are usually set to a value that is larger than the fourth remaining hot water amount.

In step S14 then takes place, and the timing of the aforementioned counter Add boiling up expected time T _1, in step S15, based on the counting result of the counter, whether the additional boiling up expected time T ₁ is passed The boiling control unit 122 determines. Proceeds to step S17 step S15 Add boiling up expected time T ₁ in the described below when it is determined that not elapsed yet, the process proceeds to step S16 when it is determined that the additional boiling up expected time T ₁ is passed.

Incidentally, until boiling up control unit 122, a detection result of the remaining hot water detection unit 25 monitors the counter in step S14 is the measurement of the additional boiling up expected time T _1, add boiling up expected time T ₁ is passed When the remaining hot water amount in the hot water storage tank 20 becomes less than the first remaining hot water amount, the additional boiling operation is started with the second remaining hot water amount as the target boiling hot water amount.

In step S16, the boiling control unit 122 resets the boiling increase flag to “0”. If additional boiling up expected time T ₁ is started adding boiling up operation for a period shorter, even if not even reached the target boiling up hot water when adding boiling up expected time T ₁ is passed, boiling widening flag Is reset to “0”.

Thereafter, step S17 is performed in which the boiling control unit 122 determines whether or not the boiling increase flag is “1”. When it is determined in step S17 that the boiling increase flag is “1”, that is, when it is determined in step S15 that the estimated additional boiling time T ₁ has not yet elapsed, the routine proceeds to step S18, where The boiling state is started when the amount is less than the first remaining hot water amount, and the boiling state is finished when the amount is equal to or more than the second remaining hot water amount.

On the other hand, when it is determined in step 17 that the boiling increase flag is not “1”, that is, “0”, the process proceeds to step S 19, where boiling is started with less than the third remaining hot water amount, and the fourth remaining A control state is reached in which boiling is completed when the amount of hot water is equal to or greater. After step S18, S19, a loop state returns to the step 14 of counting for the predetermined time T ₁ boiling additional above.

  In the hot water storage type water heater 150 that controls the additional boiling operation as described above, the additional boiling scheduled time elapses from the start of hot water filling to the bathtub 180 or the reheating of the bath water 180a (see FIG. 1). If the remaining hot water amount becomes less than the first remaining hot water amount in the meantime, additional boiling of hot water by the heat pump unit 10 (see FIG. 1) is started, so that it is difficult for hot water to run out when filling the bath 180 or bathing. Even if the amount of hot water used on the day (including the amount of hot water used as a heat source during reheating operation) is higher than the previous day, the hot water runs out when filling the bath 180 or bathing (when reheating). Is hard to get up.

  Also, depending on the number of people using the hot water storage hot water supply 150 on the day (especially the number of people planning to use the bathtub 180) and the amount of hot water desired by the user (for example, “more”, “less”, “automatic”, etc.) It is possible to set the amount of remaining hot water, the scheduled additional boiling time, and the target boiling water amount that will trigger the additional boiling operation, so that the amount of boiling water in the additional boiling operation is prevented from becoming excessive. It is also easy to reduce energy consumption.

Embodiment 2. FIG.
The hot water storage type water heater of the present invention can be configured such that when the detection result of the remaining hot water amount detection unit becomes less than the condition value, the boiling control unit performs additional boiling operation as needed. When the hot water storage type hot water heater is configured in this way, the boiling control unit performs the first embodiment until a predetermined additional boiling scheduled time elapses from the start of hot water supply or bath water replenishment to the bathtub. The reheating operation is performed using the second remaining hot water amount larger than the first remaining hot water amount as the target boiling hot water amount in the same hot water as that in the hot water storage type hot water heater described in the above.

  The remaining hot water amount that triggers the additional boiling operation when the hot water supply to the bathtub or the replenishment of the bath water is not started is the first to trigger the additional boiling operation within the scheduled additional boiling time. The remaining amount of hot water can be the same amount or a different amount. Further, the additional boiling scheduled time and the target boiling hot water amount can be set under the same standard as the standard in the first embodiment from the viewpoint of preventing the hot water from running out during hot water filling or bathing. preferable.

FIG. 4 is a schematic diagram illustrating an example of control related to the additional boiling operation in the hot water storage hot water heater configured to perform the additional boiling operation whenever necessary when the detection result of the remaining hot water amount detection unit becomes less than the condition value. FIG. In the example shown in the figure, since the additional boiling scheduled time is “T ₂ ”, a step corresponding to step S12 shown in FIG. 3 is indicated by a reference sign “S12a” and corresponds to step S14 shown in FIG. A step corresponding to step S15 shown in FIG. 3 is indicated by a reference symbol “S15a”.

  As apparent from the comparison between FIG. 4 and FIG. 3, the control procedure shown in FIG. 4 is different from step S13 in that step S20 is performed between step S13 and step S14a (corresponding to step S14 in FIG. 3). Since it is the same as the control procedure shown in FIG. 3, only step S20 will be described here, and description of other steps will be omitted.

  In said step S20, the boiling control part 122 (refer FIG. 2) judges whether the boiling operation (normal boiling operation or additional boiling operation) is being performed.

If it is determined in step S20 that the boiling operation is not being performed, the process proceeds to step S15a. If it is determined that the boiling operation is being performed, the hot water storage operation is performed by the boiling operation, so step S14a Proceed to, and the additional boiling scheduled time T ₂ is counted (counted).

  Even in the hot water storage type water heater configured so that the boiling control unit 122 controls the additional boiling operation as described above, for the same reason as in the hot water storage type hot water heater 10 described in the first embodiment, It is difficult for hot water to run out when bathing in the bathtub 180 or taking a bath. Even if the amount of hot water used on the day (including the amount of hot water used as a heat source during reheating operation) is higher than the previous day, the hot water runs out when filling the bath 180 or bathing (when reheating). Is hard to get up.

Embodiment 3 FIG.
In hot water storage water heaters, once the normal boiling operation is started, the normal boiling operation is continued until the target boiling hot water volume is reached even if the electricity price is cheaper even after the midnight power hours have passed. Is done. When operating the hot water storage type water heater under such an operation mode, the additional boiling operation is performed using the remaining boiling time as a parameter instead of the additional boiling scheduled time described in the first and second embodiments. Can be controlled.

  In this case, the boiling control unit determines whether or not the amount of boiling water at the time when the midnight power time zone has passed has reached the target boiling water amount based on the detection result of the remaining hot water amount detection unit. And, for example, the amount of boiling water at the time when the midnight power time period has elapsed due to reasons such as consumption of hot water more than expected between the start of normal boiling operation and the passage of the midnight power time period, When the target boiling water amount has not been reached, the remaining boiling time until the target boiling water amount is reached is calculated. After that, additional boiling is performed depending on whether the remaining boiling time is less than a predetermined time (hereinafter referred to as “first remaining time”) at the start of hot water supply to the bathtub or at the start of bathing water. Select the details of operation control as appropriate.

  That is, when the remaining boiling time is less than the first remaining time at the start of hot water supply to the bathtub or at the start of bathing, for example, the current remaining hot water amount and the amount of hot water to be boiled in the additional boiling operation Correct the remaining boiling time so that the total amount is greater than the amount expected to be supplied from the hot water storage tank to the bathtub or reheating heat exchanger when filling the bath or taking a bath. Update to 1 remaining time. When the remaining hot water amount in the hot water storage tank becomes less than the first remaining hot water amount until the first remaining time elapses, the second remaining hot water amount having a value larger than the first remaining hot water amount is raised to the boiling target. Start the additional boiling operation of hot water.

  On the other hand, when the remaining boiling time is equal to or longer than the first remaining time at the start of hot water supply to the bathtub or at the start of bathing water, the remaining boiling time is not corrected.

Note that the first remaining time described above is calculated when the amount of heat Q ₁ corresponding to the target boiling water amount in the normal boiling operation is calculated, and when the midnight power time zone obtained based on the detection result of the remaining hot water amount detection unit has elapsed. The heat storage amount Q ₂ is calculated from the remaining hot water amount, and the target heat amount is obtained by additional boiling operation when the difference (Q ₁ -Q ₂ ) between the heat amount Q ₁ and the heat storage amount Q ₂ is set as the target heat amount. This corresponds to the time required for this. At this time, the information regarding the heating capability of the heat source machine necessary for obtaining the first remaining time is stored in advance in the storage unit of the control device by the manufacturer of the hot water storage type hot water heater.

For example, when the heat pump unit uses carbon dioxide as a refrigerant, for example, when the outside air temperature Ta is less than 7 ° C., the heating capacity Y is expressed by the following formula (i):
Y = 0.16 × Ta + 6.7 (ii)
When the outside temperature Ta is 7 ° C. or higher, the following formula (ii)
Y = −0.18Ta + 9.1 (ii)
Can be calculated respectively. A temperature sensor for detecting the outside air temperature is attached in advance to a desired location in the hot water storage type water heater, for example, the outer surface of the heat pump unit, and the detection result of the temperature sensor is monitored by the control device.

  The configuration of the hot water storage type water heater that controls the additional boiling operation using the remaining boiling time as a parameter is that the temperature sensor described above for detecting the outside air temperature is provided, and the function of the boiling control unit is slightly changed. Since it can be set as the structure similar to the hot water storage type water heater 150 shown in FIG. 1, illustration is abbreviate | omitted here. Hereinafter, the control related to the additional boiling operation in the hot water storage hot water heater will be described in detail with reference to FIGS. 5 and 6 while appropriately quoting the reference numerals used in FIG. 1 or FIG.

  FIG. 5 is a block diagram schematically illustrating an example of a boiling control unit in a hot water storage type water heater that controls the additional boiling operation using the remaining boiling time as a parameter. The boiling control unit 122A shown in the figure includes a first boiling control unit 122a, a use heat amount calculation unit 122b, a target heat amount calculation unit 122c, a second boiling control unit 122d, a heat storage amount calculation unit 122e, and a remaining heating time calculation unit. 122f, a remaining heating time measuring unit 122g, and a remaining heating time correcting unit 122h.

  The first boiling control unit 122a controls the normal boiling operation. The target heat amount corresponding to the target boiling water amount in the normal boiling operation can be input from the remote controller 145 (see FIG. 1) as a “hot water amount” by the user, for example, but in the illustrated boiling control unit 122A, The actual heat consumption data for a certain period (for example, the past 7 days) is calculated and managed every 24 hours by the heat consumption calculation unit 122b, and the target heat amount calculation unit 122c calculates the average consumption per 24 hours based on the data. The amount of heat is calculated, and the average amount of heat consumed is set as the target heat amount.

  On the other hand, the second boiling control unit 122d controls the additional boiling operation. The control related to the additional boiling operation is performed when the amount of heat stored in the hot water storage tank 20 (see FIG. 1) at the time when the midnight power time period has elapsed does not reach the target heat amount in the normal boiling operation. The remaining heating time calculated by the calculation unit 122f, that is, the remaining required time until the target heat amount is reached, the time measurement result of the remaining heating time measuring unit 122g for measuring the elapsed time of the remaining heating time, and the user input from the remote controller 145 This is performed using information related to the number of people on the day of the hot water storage type water heater (especially the number of people scheduled to use the bathtub).

  At this time, the heat storage amount calculation unit 122e calculates the heat storage amount in the hot water storage tank 20 at the time when the midnight power time zone has elapsed based on the detection result of the remaining hot water amount detection unit 25 (see FIG. 1), and the remaining heating The time calculation unit 122f calculates the remaining heating time as described above. The remaining heating time calculation unit 122f has a clock function, and the time of the clock function and, for example, the midnight power time zone input by the user from the remote controller 145 and stored in the storage unit 127 (see FIG. 2). Based on the time information, it is determined whether or not the midnight power period has elapsed. Then, the remaining heating time is calculated using the target heat amount in the additional boiling operation, the detected temperature of the tank temperature sensor 23, the detected temperature of the feed water temperature sensor 35 (see FIG. 1), and the heating capability of the heat source unit. . The remaining heating time correction unit 122h corrects the remaining heating time based on the information related to the number of users.

  FIG. 6 is a flowchart schematically showing an example of a control procedure for controlling the additional boiling operation using the remaining boiling time as a parameter. In the following, the reference numerals used in FIG. 1 or FIG.

  In step S31 performed first, the remaining heating time calculation unit 122f determines whether or not the midnight power time period has elapsed. When it is determined in step S31 that the midnight power time zone has not elapsed, step S31 is repeated, and when it is determined that the midnight power time zone has elapsed, the process proceeds to step S32.

  In step S32, the target heat amount calculated by the target heat amount calculation unit 122c, the heat storage amount in the hot water storage tank 20 when the midnight electric power time zone calculated by the heat storage amount calculation unit 122e, the temperature detected by the tank temperature sensor 23, and the water supply The remaining heating time calculation unit 122f calculates the remaining heating time using the temperature detected by the temperature sensor 35 (see FIG. 1) and the heating capability of the heat source device (heat pump unit 10 (see FIG. 1)).

  In the next step S33, the remaining heating time Tg calculated by the remaining heating time calculator 122f in step S32 is set in the counter by the remaining heating time timer 122g. At this stage, the remaining heating time timer 122g does not start measuring the remaining heating time Tg.

  In the next step S34, for example, whether or not the normal boiling operation is continued depending on whether or not the first boiling controller 122a is driving the hot water storage water pump 45 (see FIG. 1). Is determined by the remaining heating time counter 122g. For example, when the hot water storage water supply pump 45 is started and stopped, the first boiling control unit 122a sends predetermined signals to the remaining heating time measuring unit 122g, respectively. When it is determined in step S34 that the normal boiling operation is not continued, the process proceeds to step S36 described later, and when it is determined that the normal boiling operation is continued, the process proceeds to step S35.

  In step S35, the remaining heating time timer 122g periodically recalculates the remaining heating time Tg, for example, periodically as the heat storage amount in the hot water storage tank 20 gradually increases and approaches the target heat amount by continuing the normal boiling operation. And update. Specifically, the duration time of the normal boiling operation starting from the time when the midnight power time zone has elapsed is subtracted from the remaining heating time Tg.

  Next, in step S36, the second boiling control unit 122d (see FIG. 5) determines whether or not the filling of the bath 180 or the replenishment of the bath water 180a (see FIG. 1) has been started. If it is determined in step S36 that neither hot water filling nor chasing has been started, the process proceeds to step S39 described later. If it is determined that hot water pouring or chasing has been started, the process proceeds to step S37.

  In step S37, the remaining heating time correction unit 122h (see FIG. 5) determines whether or not the remaining heating time Tg at the time when either hot water filling or chasing is started is less than the first remaining time. During the first remaining time, an amount of hot water expected to be supplied from the hot water storage tank 20 to the bathtub 180 or the reheating heat exchanger 110 (see FIG. 1) is boiled when filling the bathtub 180 or taking a bath. The remaining heating time correction unit 122h corresponds to the time required for the remote controller 145 (see FIG. 1) based on the same criteria as the calculation of the estimated additional boiling time described in the first and second embodiments. The first remaining time is calculated using the information relating to the number of users (especially the number of people who plan to use the bathtub 180) on the day of the hot water storage type water heater input from.

  When it is determined in step S37 that the remaining heating time Tg is equal to or longer than the first remaining time, the process proceeds to step S39 described later, and when it is determined that the remaining heating time Tg is less than the first remaining time, the process proceeds to step S38. The remaining heating time correction unit 122h corrects the remaining heating time Tg to be measured by the remaining heating time measuring unit 122g to the first remaining time.

In the next step S39, the second boiling control unit 122d determines whether or not the remaining heating time Tg is greater than 0 (zero). When the remaining heating time Tg ₁ is greater than 0 (zero), the process proceeds to step S40, and when the remaining heating time Tg is 0 (zero), the process proceeds to step S41.

  In step S40, the boiling state is started when it is less than the first remaining hot water amount, and the boiling state is finished when the second remaining hot water amount or more is reached. The first and second remaining hot water amounts are the same as, for example, the first and second remaining hot water amounts described in the first and second embodiments.

  On the other hand, in step S41, the boiling state is started when the amount is less than the third remaining hot water amount, and the boiling state is terminated when the amount is the fourth remaining hot water amount or more. It should be noted that the third and fourth remaining hot water amounts are the same as the third and fourth remaining hot water amounts described in the first and second embodiments, for example. After steps S40 and S41, the process returns to step S34 to enter a loop state.

  Even when the hot water storage type hot water heater is configured to control the additional boiling operation using the remaining boiling time as a parameter as described above, similarly to the hot water storage type water heater described in the first and second embodiments, For the same reason as in the hot water storage type hot water heater 10 described in the first embodiment, it is difficult for hot water to run out when filling the bath 180 or bathing. Even if the amount of hot water used on the day (including the amount of hot water used as a heat source during reheating operation) is higher than the previous day, the hot water runs out when filling the bath 180 or bathing (when reheating). Is hard to get up.

  In addition, since the remaining heating time is not corrected when the remaining heating time is equal to or longer than the first remaining time at the start of hot water filling or chasing, the amount of hot water used within a predetermined period (for example, the use for the past seven days) When the amount of hot water used on the day does not increase compared to the target amount of boiling water calculated from the amount of hot water), an extra boiling operation is prevented.

  In step S38 shown in FIG. 6, the remaining heating time Tg is corrected to the first remaining time. However, the remaining heating time Tg is corrected when the remaining heating time Tg is equal to or longer than the first remaining time, for example, the remaining heating time. It can also be performed so that the total time of Tg and the first remaining time is reached.

  As mentioned above, although the hot water storage type hot water heater of the present invention has been described with reference to the embodiment, as described above, the present invention is not limited to the above embodiment. For example, in Embodiment 3, the additional boiling operation is controlled by focusing on the amount of hot water, but the additional boiling operation may be controlled by replacing the amount of hot water with the amount of heat. When replaced with heat quantity, the control unit calculates the remaining heating time until the target heat quantity is reached when the heat storage quantity in the hot water storage tank has not reached the target heat quantity when the midnight power time period has elapsed, and starts hot water supply to the bathtub. Or when the remaining heating time at the start of bathing is less than the first remaining time, the remaining heating time is corrected to a value greater than or equal to the first remaining time, and the amount of heat stored in the hot water storage tank is When it becomes less than the heat storage amount, the heat source machine is caused to perform additional boiling of hot water with the second heat storage amount having a value larger than the first heat storage amount as the target heat amount.

  In addition, the time keeping process described in the first and second embodiments and the remaining heat time measuring process described in the third embodiment are used on the day of the hot water storage type water heater in one additional boiling operation. As long as the amount of hot water corresponding to the number of people (especially the number of people who plan to use the bathtub) can be secured, once per 24 hours (one day) is sufficient for practical use. That is, the additional boiling operation, which is a characteristic part of the hot water storage type water heater of the present invention, corresponds to the number of users of the hot water type hot water heater on the day (especially the number of people who intend to use the bathtub) in one additional boiling operation. If the conditions are set so that a sufficient amount of hot water can be secured, once in 24 hours (1 day) is sufficient for practical use. As described in the embodiment, when information on the number of users is input from the remote controller, the control device calculates and automatically sets the estimated additional time or remaining heating time as a function of the number of users. If the hot water storage type hot water heater is configured as described above, its convenience is enhanced. Needless to say, the hot water storage type hot water heater may be configured so that a plurality of additional boiling operations can be performed per 24 hours (one day).

  As the heat source device, an electrothermal heater, a gas combustion device, or the like can be used in addition to the heat pump unit. The heat source device is arranged outside the hot water storage tank or inside the hot water storage tank depending on the type. The present invention can be variously modified, modified and combined in addition to the above.

  The hot water storage type hot water heater of the present invention can be suitably used as a domestic and commercial hot water heater.

10 Heat pump unit (heat source machine)
DESCRIPTION OF SYMBOLS 20 Hot water storage tank 25 Remaining hot water detection part 40 Water supply line 50 Circulation line for hot water storage 60 Hot water supply line 65 General hot water mixing valve 70 Bath hot water mixing valve 80 General hot water supply line 90 Bath hot water supply line 100 Tank side circulation line 110 Reheating Heat Exchanger 120 Bath-side Circulation Lines 122, 122A Boiling Control Unit 123 Hot Water Supply Control Unit 124 Additional Heating Control Unit 125 Control Unit 130 Control Device 145 Remote Controller 150 Hot Water Storage Water Heater 180 Bathtub 180a Bath Water

Claims (8)

A hot water storage tank, a heat source device that boils hot water stored in the hot water storage tank into hot water, a remaining hot water amount detection unit that is attached to the hot water storage tank and detects a remaining hot water amount in the hot water storage tank, and a remaining hot water amount detection unit A control device for controlling the heat source device based on a detection result; and a remote controller functioning as an input device for the control device; filling hot water stored in the hot water storage tank into the bathtub and bathing in the bathtub; A hot water storage type water heater that can be used for at least one of water replenishment,
After the start of hot water supply to the bathtub or the replenishment of the bath water, the control device reaches a predetermined additional boiling scheduled time that is measured in advance when the heat source unit is in a heating operation. Until the amount of remaining hot water becomes less than the first amount of remaining hot water, the second heat remaining amount larger than the first amount of remaining hot water is used as the boiling target value, and additional boiling of hot water is performed in the heat source machine. A hot water storage type water heater characterized by being made to perform. After the additional boiling time elapses, the control device is more than the third remaining hot water amount when the remaining hot water amount becomes less than the third remaining hot water amount which is smaller than the first remaining hot water amount. 2. The hot water storage type hot water supply device according to claim 1 , wherein the heat source device is caused to perform additional boiling of hot water whose boiling value is the fourth remaining hot water amount having a large value. Wherein the controller, when the information of the number from the remote controller is inputted, it one of the claims 1 or 2, characterized in that setting the additional boiling up scheduled time as a function of the number of employees The hot water storage water heater described in 1. The hot water storage type hot water supply apparatus according to any one of claims 1 to 3 , wherein the control device performs a time measurement process of the additional boiling time once per day. Before SL controller, the have boiling up amount of hot water by the heat source machine such have reached the target boiling up hot water at midnight when power consumption period elapsed times, and calculates the remaining boiling up time to reach the target boiling up amount of hot water, When the remaining boiling time is less than the first remaining time at the start of hot water supply to the bath or at the start of replenishing the bath water, the remaining boiling time is corrected to a value equal to or greater than the first remaining time. and, wherein until the remaining boiling up time after correction has elapsed, when the remaining hot water is less than the first remaining hot water, the additional water to the pre-Symbol second remaining hot water and the target boiling up amount of hot water The hot water storage type water heater according to claim 1, wherein boiling is performed by the heat source unit. When the remaining heating time after the correction has elapsed, the control device determines the third remaining hot water amount when the remaining hot water amount becomes less than a third remaining hot water amount that is smaller than the first remaining hot water amount. The hot water storage type hot water supply apparatus according to claim 5 , wherein the heat source machine is caused to perform additional boiling of hot water whose boiling target value is the fourth remaining hot water amount having a larger value. The hot water storage type water heater according to claim 5 or 6 , wherein the control device corrects the remaining heating time as a function of the number of users when information on the number of users is input from the remote controller. . The hot water storage type hot water supply device according to any one of claims 5 to 7 , wherein the control device performs the correction process of the remaining heating time once per day.

Images