JP2008089208A - Hot water supply system, and operation mode diagnosis method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water supply system and its operation mode diagnosis method capable of selecting the optimum operation mode and presenting the same to a user on the basis of use actual performance. <P>SOLUTION: This hot water supply system has a control part 35 for controlling the operation of the hot water supply system on the basis of the operation mode selected from the plurality of operation modes. The control part 35 has an operation standard calculating means 353 calculating operation standard for deciding an additional boiling condition of hot water on the basis of hot water supply quantity and a temperature of supplied hot water within a prescribed time, a use actual performance calculating means 354 calculating the use actual performance indicating the use actual performance of the hot water supply system, and a recommended mode selecting means 355 having a plurality of first applicable conditions decided on the operation standard, the use actual performance or the selected operation mode, and selecting the recommended operation mode corresponding to the satisfied first applicable condition among the plurality of first applicable conditions, and the selected recommended operation mode is displayed on an operation display part 37. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a hot water supply system and an operation mode diagnosis method for a hot water supply system, and more specifically, based on a user's actual use, a hot water supply system capable of presenting an optimal operation mode to the user and an operation mode diagnosis of the hot water supply system. Regarding the method.

  2. Description of the Related Art In recent years, a heat pump hot water supply system that heats hot water by heat exchange has attracted attention as a hot water supply system that can supply hot water with energy saving. Further, in the heat pump hot water supply system, conventionally, a plurality of operation modes having different control methods such as the timing of boiling water are prepared, and can be selected according to the user's preference. As such an operation mode, for example, a “full tank” mode that fills the hot water tank with the amount of hot water that can be used at all times, and “midnight only” that boils hot water only at midnight (23: 00 to 7:00). There is a mode and an “automatic” mode in which hot water is appropriately boiled at the judgment of the hot water supply system. However, there are cases where the user does not know which operation mode is the best mode for him and selects an operation mode that does not match his usage. For example, if the amount of hot water used per day is small and it is sufficient to operate in the “late night” mode, if the “full tank” mode is selected, the hot water will be boiled during the day, even if unnecessary. , Extra operating costs will be incurred.

  Thus, a hot water supply system that determines and displays which operation mode is recommended for the user based on the past hot water usage by the user has been developed (see Patent Document 1). The hot water supply system described in Patent Document 1 includes a navigation switch provided on the operation panel. When the navigation switch is pressed, “full”, “automatic”, and “late night only” based on the amount of hot water used for the past week. The most suitable mode is selected from the three operation modes.

  However, Patent Document 1 does not disclose what criteria are used to select the operation mode. In addition, since there is no means to know what the user is mainly looking for, only a negative guidance is possible, such as setting the “Late only at night” mode to the recommended mode only when there is sufficient margin for the amount of hot water used. There wasn't.

JP 2004-294047 A

An object of the present invention is to provide a hot water supply apparatus and a control method for the hot water supply apparatus that can solve the above-described problems caused by the prior art.
Another object of the present invention is to provide a hot water supply system and a hot water supply system operation mode diagnosis method capable of selecting an optimum operation mode and presenting it to a user based on the actual use of the hot water supply system.

According to the embodiment of the present invention, the hot water supply system according to the present invention includes a hot water measuring unit (24, 32) that measures the amount of hot water from the hot water storage tank (21), and at least a hot water storage tank (21 ) For measuring the temperature of the hot water discharged from the hot water measured by the hot water measured by the temperature measuring unit (29, 31) and the amount of the hot water measured by the hot water measuring unit (24, 32). A storage unit (36) that stores the temperature and a control unit (35) that controls the operation of the hot water supply system according to an operation mode selected from a plurality of operation modes that regulate the operation of the hot water supply system. Then, the control unit (35) calculates an operation reference amount for determining the heating condition of hot water to be stored in the hot water storage tank based on the amount of hot water and the hot water temperature within a predetermined period stored in the storage unit (36). Based on the reference amount calculation means (353), the amount of hot water used in the predetermined period and the hot water temperature, the actual usage amount calculation means (354) for calculating the actual usage amount representing the actual usage of the hot water supply system, and the recommendation to be presented to the user When there are a plurality of first application conditions corresponding to the operation mode, and it is determined whether or not each of the first application conditions is satisfied based on the operation reference amount and the actual usage amount or the selected operation mode, Recommended mode selection means (355) for selecting a recommended operation mode corresponding to the determined first application condition is displayed, and the selected recommended operation mode is displayed on the operation display unit (37).
By having such a configuration, it is possible to select an operation mode that is considered to be optimal in consideration of the actual use of the hot water supply system, and thus it is possible to present an appropriate operation mode to the user.

Further, as described in claim 2, the recommended mode selection means (355) has a plurality of second application conditions corresponding to the advice information presented to the user, and the selected recommended operation mode, the actual usage amount or Based on the selected operation mode, it is determined whether or not each of the second application conditions is satisfied, advice information corresponding to the second application condition determined to be satisfied is selected, and the control unit (35) The selected advice information is preferably displayed on the operation display unit (37).
By having such a configuration, it is possible to give appropriate advice to the user based on the actual usage of the hot water supply system.

Furthermore, as described in claim 3, the recommended mode selection means (355) has a plurality of diagnosis modes determined according to items emphasized by the user, and the diagnosis type signal received from the operation display unit (37). Preferably, any one of the plurality of diagnosis modes is selected based on the above, and the first application condition or the second application condition is changed according to the selected diagnosis mode.
By having such a configuration, it is possible to change the recommended operation mode or advice message according to the user's preference or the item to be emphasized, so the user can select the optimum operation mode that suits his / her preference. It becomes easy.

  Further, as described in claim 4, when the recommended mode selection means (355) selects a mode in which importance is placed on reducing the operating cost of the hot water supply system as the diagnostic mode, the operation reference amount used in the first application condition is: It is preferable to include a target accumulated heat amount in which the amount of hot water accumulated in the hot water storage tank (21) is expressed in terms of heat amount, and a boiling temperature that is a target attainment temperature when the hot water is heated by the heat pump unit (10). By using the target accumulated heat amount and the boiling temperature as the determination criteria, it is possible to accurately determine whether or not useless operation costs have occurred, and therefore it is possible to select an appropriate recommended operation mode.

  Alternatively, as described in claim 5, when the recommended mode selection means (355) selects a mode in which reheating of hot water stored in the bathtub (7) is selected as a diagnostic mode, it is used in the first application condition. The operation reference amount includes the learning hot water storage amount that is the standard hot water storage amount in the hot water storage tank (21) and the boiling temperature, and the actual usage amount used in the first application condition is the hot water storage tank (21). It is preferable to include an index indicating whether or not a reheating standby state in which hot water stored in the bathtub (7) cannot be reheated using the remaining hot water is generated. By using such an index or the like as the operation reference amount and the actual usage amount, an operation mode that can suppress the occurrence of the reheating standby state can be presented to the user as the recommended operation mode.

  Or when the recommendation mode selection means (355) selects the mode which attaches importance to the amount of hot water which can be used as a diagnostic mode as described in claim 6, the operation reference amount used in the first application condition is the learning hot water storage amount. And the use actual amount used in the first application condition include a minimum remaining hot water amount that is a minimum value of the usable hot water amount stored in the hot water storage tank (21) in a predetermined period. preferable. By using such an index as the operation reference amount and the actual usage amount, an operation mode that can suppress the occurrence of a hot water shortage in which the amount of usable hot water is insufficient can be presented to the user as a recommended operation mode.

  Further, as described in claim 7, it is preferable that the actual usage amount used in the second application condition is an index representing variation in the amount of hot water used per day in a predetermined period. As such an index, for example, the difference between the maximum value and the minimum value of the amount of hot water used per day during a predetermined period, the difference between the maximum value of the amount of hot water used per day during the predetermined period and the average amount of hot water used per day, or 1 A standard deviation of the amount of hot water used per day can be used.

  Furthermore, as described in claim 8, it is preferable that the second application condition includes whether or not the selected operation mode matches the recommended operation mode. By selecting an advice message based on such a condition, when the user operates the hot water supply system in an inappropriate operation mode, the user can be prompted to change to an appropriate operation mode.

  Moreover, according to the form of Claim 9, it has the heat pump unit (10) which heats warm water, and the hot water storage tank (21) which stores the heated warm water, and is stored in the bathtub (7) from the hot water storage tank (21). Alternatively, a tank unit (20) for discharging hot water to the hot water tap (8), an operation display unit (37) having a user interface, and a hot water amount measuring unit (24, 32) for measuring the amount of hot water discharged from the hot water storage tank (21). ), At least a temperature measuring unit (29, 31) for measuring the temperature of hot water discharged from the hot water storage tank (21), and a tapping amount and temperature measuring unit (29) measured by the tapping amount measuring unit (24, 32). , 31) and a storage unit (36) for storing the hot water temperature, and a control unit (35) for controlling the operation according to an operation mode selected from a plurality of operation modes for defining the operation. Operation mode diagnostic methods are provided. The operation mode diagnosis method according to this embodiment calculates an operation reference amount for determining the condition for increasing the amount of hot water stored in the hot water storage tank (21) based on the amount of hot water discharged and the hot water temperature within a predetermined period stored in the storage unit (36). A plurality of first application conditions corresponding to a recommended operation mode to be presented to the user, a step of calculating a usage record amount representing a use record of the hot water supply system based on a tapping amount and a hot water temperature within a predetermined period For each of the first application conditions based on the operation reference amount and the actual usage amount or the set operation mode, and a recommendation corresponding to the first application condition determined to be satisfied. A step of selecting an operation mode, and a step of displaying the selected recommended operation mode on the operation display unit (37).

  Further, as described in claim 10, for the plurality of second application conditions corresponding to the advice information presented to the user, based on the selected recommended operation mode and the actual usage amount or the selected operation mode, Determining whether each of the two application conditions is satisfied, selecting advice information corresponding to the second application condition determined to be satisfied, and displaying the selected advice information on the operation display unit (37) Preferably comprising the steps of:

  Furthermore, as described in claim 11, a step of acquiring a diagnosis type signal from the operation display unit (37), and a plurality of diagnosis modes determined according to an item emphasized by the user based on the diagnosis type signal It is preferable to include a step of selecting any one of the above and changing the first application condition or the second application condition according to the selected diagnosis mode.

  In addition, the code | symbol in the parenthesis attached | subjected to each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  Hereinafter, a hot water supply system according to the present invention will be described in detail with reference to the drawings. The hot water supply system according to the present invention analyzes the usage results of the hot water supply system by the user based on the fluctuations in the amount of hot water used every day, and the reference amount obtained from the analysis results satisfies a predetermined condition. By examining the above, the user selects and presents the operation mode and advice that seem to be optimal for the user.

FIG. 1 shows a schematic configuration diagram of a hot water supply system according to the present invention. A hot water supply system 1 according to the present invention includes a heat pump unit 10 and a tank unit 20.
The heat pump unit 10 includes an electric pump 11, an electric expansion valve 12, an evaporator 13, a compressor 14, an electric fan 15, a water refrigerant heat exchanger 16, and a control unit 17. The electric pump 11 includes a heat pump pipe for circulating hot water between the heat pump unit 10 and the tank unit 20 (a heat pump pipe 3 a for flowing hot water from the tank unit 20 to the heat pump unit 10, and a tank unit from the heat pump unit 10. 20 is provided in the heat pump return pipe 3b) for returning the hot water to 20, and the hot water is circulated between both units through the heat pump pipes 3a and 3b.

  Moreover, the electric expansion valve 12, the evaporator 13, the compressor 14, the electric fan 15, and the water refrigerant heat exchanger 16 constitute a heat pump cycle. In the heat pump cycle, the refrigerant compressed by the compressor 14 and having a high pressure flows into the water refrigerant heat exchanger 16. In the water refrigerant heat exchanger 16, the high-pressure refrigerant exchanges heat with the hot water sent from the tank unit 20 to heat the hot water. On the other hand, the high-pressure refrigerant after heat dissipation that has passed through the water-refrigerant heat exchanger 16 is sent to the electric expansion valve 12 and depressurized to a low-pressure state. Then, the refrigerant in a low pressure state is sent to the evaporator 13 and absorbs heat from the atmosphere or the like in the evaporator 13 to evaporate, and then is sucked into the compressor 14 and compressed again. The electric fan 15 blows outside air toward the evaporator 13 to help evaporate the refrigerant.

  The control unit 17 of the heat pump unit 10 includes, for example, an embedded microprocessor and a nonvolatile memory. And the control part 17 is electrically operated in order to adjust the heating temperature of warm water based on control signals etc., such as setting temperature received from the control part 35 of the tank unit 20 through a communication wire (not shown). The pump 11, the electric expansion valve 12, the compressor 14, and the electric fan 15 are controlled.

  On the other hand, the tank unit 20 includes a hot water storage tank 21, a bathtub pipe 5, a hot water supply pipe 6, and a water pipe 9 connected to the hot water storage tank 21. Further, the tank unit 20 includes sensors such as various valves and thermistors provided in the hot water storage tank 21 and each pipe, a control unit 35 that controls them, a storage unit 36 that stores various data, and a user's An operation display unit 37 for inputting an operation instruction signal and displaying various information is provided.

  The hot water storage tank 21 is connected to a heat pump pipe (a heat pump pipe 3 a and a heat pump return pipe 3 b) connected to the heat pump unit 10. The hot water storage tank 21 keeps hot hot water heated by the heat pump unit 10 while keeping it warm. In the present embodiment, a hot water storage tank 21 having a capacity of 370 L (liter) is used. However, other capacity tanks may be used.

Furthermore, the tank unit 20 discharges hot water stored in the hot water storage tank 21 from the intake port attached above the hot water storage tank 21 to the bathtub 7 through the bathtub pipe 5 or from the intake port through the hot water supply pipe 6 to the hot water tap 8. You can let the hot water out. Further, tap water supplied from the water supply is supplied through the water supply pipe 9. The water supply pipe 9 is connected to the bathtub pipe 5 by a hot water filling mixing valve 22. Similarly, the water supply pipe 9 is connected to the hot water supply pipe 6 by the hot water supply mixing valve 30. The hot water mixing valve 22 and the hot water mixing valve 30 mix hot water discharged from the hot water storage tank 21 and tap water supplied through the water pipe 9 at a predetermined ratio based on a control signal from the control unit 35. Then, hot water having a predetermined temperature is supplied to the bathtub 7 or the hot-water tap 8.
Furthermore, the water supply pipe 9 is also connected to the hot water storage tank 21, and supplies the hot water storage tank 21 with tap water having an amount corresponding to the amount of hot water used by the user, thereby keeping the amount of hot water in the hot water storage tank 21 constant.

The bathtub piping 5 is provided with a hot water solenoid valve 23 on the downstream side (tub 7 side) of the hot water mixing valve 22. The hot water solenoid valve 23 opens and closes the bathtub pipe 5 based on a control signal from the control unit 35 and controls the amount of hot water discharged to the bathtub 7.
The bathtub pipe 5 branches into a bathtub-bound pipe 51 and a bathtub return pipe 52 on the downstream side of the bathtub flow counter 24. The bathtub-facing pipe 51 is provided with a flow switch 28. On the other hand, the tub return pipe 52 is provided with a circulation pump 25 and a circulation electric valve 26 in order from the upstream side (the hot water storage tank 21 side).

The circulation pump 25 discharges the air accumulated in the bathtub-bound pipe 51 and the bathtub return pipe 52 to the bathtub 7. Therefore, the circulation pump 25 circulates hot water in the bathtub-bound pipe 51 and the bathtub return pipe 52.
The circulation electric valve 26 opens and closes the bathtub return pipe 52, and controls the hot water filling to the bathtub 7 and the circulation of hot water in the bathtub connection pipe 51 and the bathtub return pipe 52 together with the circulation pump 25.
Further, the bathtub-bound pipe 51 is provided with a heat exchanger (not shown) that exchanges heat between the hot water in the hot water storage tank 21 and the hot water passing through the bathtub-bound pipe 51. And a heat exchanger reheats the hot water in the bathtub 7 circulated by the bathtub going piping 51 and the bathtub return piping 52, and performs what is called reheating.
As the flow switch 28, for example, one that operates according to the principle of an area flow meter can be used. And the flow switch 28 detects the flow volume of the warm water which flows through the pipe 51 for bathtubs, and notifies the control part 35 of the signal which is different when the flow volume is below a predetermined threshold value (for example, 5 liters / minute) or less. .

  Each of the above sections is provided with a thermistor that functions as a temperature measurement unit that measures the temperature of hot water, a hot water amount counter that functions as a tapping amount measurement unit that measures the amount of tapping water, and the like. The thermistor, the hot water counter, and the like are communicably connected to the control unit 35 and transmit measured values measured by them to the control unit 35. Specifically, the remaining tank hot water thermistors 33 a to 33 f are attached to the outer surface of the hot water storage tank 21 in order from the upper side to the lower side of the hot water storage tank 21. And the tank hot water thermistors 33a-33f each measure the hot water temperature in the hot water storage tank 21. In this embodiment, the remaining hot water thermistors 33a to 33f are, in order from the top, the amount of hot water from the upper end of the stored hot water surface being 20L, 50L, 100L, 150L, 250L, It was installed at a position of 330L.

  Further, the hot water supply pipe 6 is provided with a hot water supply temperature thermistor 31 and a hot water supply counter 32 closer to the hot water tap 8 than the hot water supply mixing valve 30. The hot water supply temperature thermistor 31 functioning as a temperature measuring unit measures the temperature of hot water discharged from the hot water tap 8. On the other hand, the hot water supply counter 32 functioning as a hot water amount measuring unit measures the amount of hot water discharged from the water tap 8. Furthermore, the tap water temperature thermistor 34 is provided in the water pipe 9 and measures the temperature of the supplied tap water.

Further, the bathtub pipe 5 is provided with a bathtub flow rate counter 24 and a bathtub circulation temperature thermistor 29 on the downstream side of the electromagnetic valve 23. The bathtub flow rate counter 24 that functions as a tapping amount measuring unit measures the flow rate of hot water flowing through the bathtub pipe 5. The bathtub circulation temperature thermistor 29 functioning as a temperature measuring unit measures the temperature of hot water discharged from the bathtub 7.
Further, the bathtub 7 is provided with a water level sensor 27 for detecting the water level of the hot water stored in the bathtub 7. As the water level sensor 27, for example, a pressure detection type can be used. In this case, the water level sensor 27 is attached to the side surface in the bathtub 7 and outputs a higher signal value as the water pressure applied to the water level sensor 27 becomes higher.

  The control unit 35 includes an embedded microprocessor and a non-volatile memory. The control of the entire hot water supply system 1 is performed based on the operation signal received from the operation display unit 37 communicable with the control unit 35 and the sensor signal acquired from each thermistor, etc., operating according to the program read from the built-in memory. I do. Moreover, the control part 35 analyzes the use performance of the hot water supply system by a user, and selects the operation mode and advice which seem to be optimal with respect to a user.

  FIG. 2 shows a functional block diagram of the control unit 35. The control unit 35 includes a hot water supply control unit 351, a state monitoring unit 352, an operation reference amount calculation unit 353, an actual usage amount calculation unit 354, and a recommended mode selection unit 355. Each of these means is mounted as a functional module based on a program read into the control unit 35.

Based on the operation mode set through the operation display unit 37 among the plurality of prepared operation modes, the hot water supply control means 351 is configured with various setting parameters such as the boiling temperature TP and the limit remaining hot water amount LSET corresponding to the operation mode. Is read from the storage unit 36. The hot water supply control means 351 heats the hot water stored in the hot water storage tank 21 to a predetermined boiling temperature according to the set operation mode when the remaining hot water amount in the hot water storage tank 21 is equal to or less than a predetermined amount or for a predetermined time. In addition, a control signal for the control unit 17 of the heat pump unit 10 is transmitted through the communication wire.
Further, the hot water supply control means 351 is based on the operation signal acquired from the operation display unit 37 and the like, such as a hot water mixing valve 22, a hot water electromagnetic valve 23, a circulation pump 25, an electric circulation valve 26, a hot water supply mixing valve 30, and the like. By transmitting a predetermined control signal to each functional unit of the unit 20, the temperature of the hot water to be supplied and the amount of hot water stored in the bathtub 7 are controlled to be values desired by the user.

Further, when a reheating instruction is given through the operation display unit 37, the hot water supply control means 351 recalculates by calculating and comparing the amount of heat in the hot water storage tank 21 and the amount of hot water stored in the bathtub 7 respectively. Check if it is possible. The amount of heat in the hot water storage tank 21 can be obtained by the amount of remaining hot water x warm water temperature, and the amount of heat of the hot water stored in the bathtub 7 is obtained based on the water level information acquired from the water level sensor x It can be determined from the temperature measured by the bath circulation temperature thermistor 29. The hot water supply control means 351 determines that it can be reheated if the amount of heat in the hot water storage tank 21 is greater than a predetermined amount of heat on the bathtub 7 side, and circulates the hot water stored in the bathtub 7 in the bathtub pipes 51 and 52. And heat with a heat exchanger. On the other hand, if the amount of heat in the hot water storage tank 21 is less than the amount obtained by adding the above-mentioned predetermined amount to the amount of heat on the bathtub 7 side, it is determined that reheating is impossible and the reheating standby state is set.
In addition, since control of each functional unit and control of the heat pump unit can be performed using various known methods, detailed description is omitted here.

  FIG. 3 shows a system diagram of operation modes that can be used in the present embodiment. As shown in FIG. 3, as a usable operation mode, “only at midnight” mode 301 in which hot water is heated by the heat pump unit 10 only in the middle of the night to store usable hot water, and when the remaining hot water amount falls below the limit remaining hot water amount LSET. There is an “automatic” mode 302 in which boiling is automatically increased, and a “full tank” mode 303 in which the amount of hot water that can be used at all times becomes full.

Further, in the “late night only” mode 301, the hot water is further classified into the hot water mode 311, the standard mode 312, and the modest mode 313 according to the boiling temperature TP that is a target temperature when the hot water is heated by the heat pump unit 10. In the hot water mode 311, the boiling temperature TP is set to 90 ° C. In the standard mode 312, the boiling temperature TP is automatically determined based on the amount of hot water used in the past week. A method for determining the boiling temperature TP will be described later. In the modest mode 313, the boiling temperature TP is set to 65 ° C.
Further, in the “Omakase” mode 302, the hot water amount mode 321, the hot water medium mode 322, the hot water amount mode 323, and the hot water amount moderation mode 324 are changed according to the limit remaining hot water amount LSET representing the available hot water amount to be maintained in the hot water storage tank 21. being classified. In the hot water amount mode 321, the limit remaining hot water amount LSET is set to 150 L. On the other hand, in the hot water amount mode 322, the limit remaining hot water amount LSET is set to either 50L or 100L based on the amount of hot water used for the past one week. A method for determining the limit remaining hot water amount LSET in this case will be described later. Further, in the hot water amount less mode 323, the limit remaining hot water amount LSET is set to 50L. Further, in hot water moderation mode 324, the limit remaining hot water amount LSET is set to 20L. In each of the modes 321 to 324 included in the “automatic” mode 302, the boiling temperature TP is automatically determined in the same manner as in the standard mode 312 described above.
In the “full tank” mode 303, the boiling temperature TP is set to 90 ° C., and the limit remaining hot water amount LSET is set to 250L.
The hot water supply control means 351 operates in accordance with any one of the above operation modes according to the user's selection. In the initial setting state, the operation mode is set to the hot water amount mode 322 of the “Random” mode 302.

  The state monitoring unit 352 generates operation information of the hot water supply system 1 as log information and stores it in the storage unit 36. For example, the state monitoring means 352 performs whether or not the amount of tapping, tapping temperature, feed water temperature, forced boiling (ie, hot water heating by the user giving a boiling instruction through the operation display unit 37) when tapping is performed. And the target boiling temperature, boiling time, amount of remaining hot water in the hot water storage tank 21 and the like at the time of the execution are acquired based on an instruction signal from the operation display unit 37, a sensor signal acquired from each thermistor or a hot water counter, and the like. Write to log information. Further, when the reheating of the hot water stored in the bathtub 7, that is, the so-called reheating is instructed through the operation display unit 37, the state monitoring unit 352 is in the reheating and reheating standby state. If so, this is also written in the log information. Then, the log information is stored in the storage unit 36 so that these information values can be calculated by the operation reference amount calculation unit 353 and the actual usage amount calculation unit 354.

  The operation reference amount calculation means 353 displays the log information stored in the storage unit 36 as necessary, for example, when receiving an operation mode diagnosis execution instruction from the operation display unit 37, or when actually performing additional heating. Based on this, the daily average amount of hot water used and variation are calculated for each week. Then, based on the calculation result, an operation reference amount serving as an index for determining the amount of hot water stored in the hot water storage tank 21 and the hot water temperature is calculated. The driving reference amount is also used as a selection index for a recommended driving mode to be presented to the user. In the present embodiment, the operation reference amount calculation means 353 has, as the operation reference amount, a target heat storage amount Qo obtained by converting the target accumulated hot water amount into a heat amount, a boiling temperature TP that is a target temperature of hot water heated by the heat pump unit 10, A limit remaining hot water amount LSET representing the available hot water amount to be kept in the hot water storage tank 21 and a learning hot water storage amount LT representing the standard hot water storage amount in the hot water storage tank 21 are calculated.

First, in order to calculate the boiling temperature TP, the operation reference amount calculation means 353 calculates the target heat storage amount Qo based on the following equation.
Qo = Qave + Qσ × α (1)
Here, Qave is the average amount of heat used, and is a value obtained by converting the average amount of hot water used per day in the past week into heat amount. In addition, the conversion from the average amount of hot water used to the average amount of heat used is calculated by (average hot water temperature THave−average hot water temperature TSave) × hot water amount Lf. The average hot water temperature THave is determined by measuring the temperature of hot water discharged from the hot water tap 8 at the hot water supply temperature thermistor 31 at the time of each hot water supply, It is obtained by measuring and averaging them. The average water supply temperature TSave is obtained by measuring the temperature of tap water supplied from the tap water at each tap water by the tap water temperature thermistor 34 and averaging them. Further, the amount Lf of hot water is obtained by measuring the amount of hot water discharged to the hot water tap 8 or the bathtub 7 with the hot water supply counter 32 or the bathtub flow rate counter 24. Qσ represents the standard deviation of the amount of heat used per day in the past week. Α is a coefficient. In the present embodiment, when the operation mode is the “large amount” mode 321 of the “Random” mode 302, α = 1.1, and the operation mode is the “Random” mode 302 medium mode 322, “ In the standard mode 312 of the “full tank” mode 303 or the “late night only” mode 301, α = 1.0, and when the operation mode is the mode “323” of the “automatic” mode 302, α = 0.9 and the operation mode is In the “Random” mode 302 in the hot water moderation mode 324, α is set to 0.8.

Further, the operation reference amount calculation means 353 determines the limit remaining hot water amount LSET. As described above, the limit remaining hot water amount LSET is set to 150 L, 50 L, and 20 L, respectively, for the hot water amount mode 321, the hot water amount mode 323, and the hot water moderation mode 324. For the hot water medium mode or midnight only standard mode 312, based on the average daily hot water level Lave converted into 90 ° C. per day and the standard deviation Lσ of the used hot water amount per day converted into 90 ° C. for the past week. Is set as follows.
a) When Lave> 150L and Lσ> 30L: LSET = 100L
b) When Lave> 150L and Lσ ≦ 30L: LSET = 50L
c) When Lave ≦ 150L and Lσ> 50L: LSET = 100L
d) When Lave ≦ 150L and Lσ ≦ 50L: LSET = 50L
Note that LSET is set to 100 L as an initial value until an actual measurement value necessary for calculating Lave or the like is obtained.

When the target heat storage amount Qo and the limit remaining hot water amount LSET are obtained, the operation reference amount calculation means 353 determines the boiling temperature TP used in the “Random” mode 302 based on the following equation.
TP = (Qo / (ASC-LSET)) + TSave (2)
However, when TP <65 ° C., TP = 65 ° C., and when TP> 90 ° C., TP = 90 ° C. is set. ASC is the capacity of the water storage tank 21, and in this embodiment, ASC = 370. The same applies to the case where the boiling temperature TP is calculated for the standard mode 312 of the “midnight only” mode 301. Further, the boiling temperature TP is set to 90 ° C. as an initial value until an actual measurement value necessary for calculating the target heat storage amount Qo and the like is obtained.

Further, the operation reference amount calculation means 353 calculates a learning hot water storage amount LT corresponding to the hot water storage amount that can cover the amount of hot water used per day by the following equation.
LT = Qo / (TP-TSave) (3)
The operation reference amount calculation means 353, when calculating each of the reference amounts, stores it in the memory or storage unit 36 that constitutes the control unit 35 so that it can be used by other means of the control unit 35.

When the usage amount calculation means 354 receives an operation mode diagnosis execution instruction from the operation display unit 37, based on the log information stored in the storage unit 36, the recommended usage mode or an index for selecting an advice message to be presented to the user Find the actual usage amount. In this embodiment, the actual usage amount calculation means 354 uses the difference LD between the maximum and minimum amount of hot water used per day within the past week as the actual usage amount, and the remaining amount in the hot water storage tank 21 at the time of the instructed measurement. The hot water amount LR and the minimum remaining hot water amount LMIN, which is a value when the remaining hot water amount has become minimum in the past week, are obtained. The remaining hot water amount LR is calculated as follows. Hot water heated by the heat pump unit 10 is supplied into the hot water storage tank 21 from above the hot water storage tank 21, while an amount of water corresponding to the amount of hot water used is supplied to the lower part of the hot water storage tank 21 through the water pipe 9. Therefore, in the hot water storage tank 21, the hot water temperature decreases in order from the top to the bottom. Therefore, the hot water temperature in the hot water storage tank 21 is checked by the tank remaining hot water thermistors 33a to 33f, and the hot water amount at the position where the hot water temperature has decreased to the use limit temperature is set as the remaining hot water amount LR. For this purpose, the actual usage amount calculation means 354 checks the measurement temperatures of the remaining tank hot water thermistors 33a to 33f in order from the thermistor installed on the upper side, and firstly decreases the usable temperature limit (for example, 42 ° C.). Identify the thermistor that returns the temperature. And the position used as a use limit temperature is calculated | required by performing linear interpolation with the measured temperature and the measured temperature by the thermistor adjacent above the thermistor.
The actual usage amount calculation unit 354 stores the above actual usage amounts in the memory or the storage unit 36 of the control unit 35 so that they can be used by other units of the control unit 35.

The recommended mode selection unit 355 includes the operation reference amount calculated by the operation reference amount calculation unit 353, the actual use amount calculated by the actual use amount calculation unit 354, the currently set operation mode, the recommended operation mode, and the advice. Based on the reference table describing the relationship with the message, the recommended operation mode and advice message to be presented to the user are determined.
Further, the recommended mode selection unit 355 has a reference table for each diagnosis mode set in accordance with matters that are important to the user in order to determine a recommended operation mode and an advice message in accordance with the user's preference. Then, the recommended mode selection unit 355 selects the reference table according to the diagnosis type signal indicating the type of the diagnosis mode input through the operation display unit 37, and uses it for selecting the recommended operation mode and the like.

4 to 6 show examples of the reference table. 4 shows a diagnostic mode reference table 401 in which the user places importance on reduction of driving costs, so-called energy saving, and FIG. 5 shows a diagnostic mode reference table 501 in which the user places importance on the additional cooking function. Shows a reference table 601 in a diagnosis mode in which the amount of hot water that can be used by the user is emphasized.
The procedure for selecting the recommended operation mode and the advice message will be described below with reference to FIG.
The reference table 401 indicates recommended operation modes corresponding to the items in the recommended operation mode analysis column 411 and the recommended operation mode analysis column 411 indicating application conditions (first application conditions) for selecting the recommended operation mode. The recommended operation mode column 412, the usage analysis column 413 indicating the application condition (second application condition) for selecting the advice message, and the advice message corresponding to each item of the usage analysis column 413 are shown. An advice message column 414 is included.

  First, the recommended mode selection unit 355 satisfies each application condition indicated in each item of the recommended operation mode analysis column 411 in the reference table 401 based on the target heat storage amount Qo that is one of the operation reference amounts. Check whether or not. If any of the items satisfies the application condition, the recommended operation mode column 412 corresponding to the item satisfying the application condition is selected. Then, the operation mode indicated in the column is set as the recommended operation mode. For example, if the target heat storage amount Qo is equal to or less than the heat amount Qn that can be heated at midnight and the boiling temperature TP is 80 ° C., the application condition of the item 411a in the recommended operation mode analysis column 411 is satisfied, so that the item 411a is supported. From the item 412a in the recommended operation mode column 412, the standard mode of the “late night only” mode is selected as the recommended operation mode. Note that if the target heat storage amount Qo is equal to or less than the heat amount Qn that can be heated at midnight and the boiling temperature TP is 65 ° C., the conservative mode of the “late night only” mode is selected as the recommended operation mode. The amount of heat Qn that can be heated at midnight is the maximum amount of heat obtained by operating the heat pump unit 10 at midnight, and is determined according to the capability of the heat pump unit 10.

  Further, when the target heat storage amount Qo is larger than the heat amount Qn that can be heated at midnight, the item 411b to 411d and the item 412b to 412d in the recommended operation mode column 412 corresponding to those items, A mode is selected. That is, if the set operation mode is the “automatic” mode hot water amount mode and the minimum remaining hot water amount LMIN for the past week is 50 L or more, the application condition of the item 411b in the recommended operation mode analysis column 411 is satisfied. From the item 412b in the recommended operation mode column 412 corresponding to the item 411b, the mode with a smaller amount of hot water in the “Random” mode is selected as the recommended operation mode. Alternatively, if the boiling temperature TP is 65 ° C. and the minimum remaining hot water amount LMIN for the past week is 20 L or more, the application condition of the item 411c in the recommended operation mode analysis column 411 is satisfied, so the recommended operation mode corresponding to the item 411c From the item 412c of the column 412, the hot water moderation mode of the “Random” mode is selected as the recommended operation mode. In other cases, the hot water mode in the “Random” mode is selected as the recommended operation mode.

When the recommended operation mode is selected, the recommended mode selection means 355 checks the items in the usage analysis column 413 corresponding to the recommended operation mode that satisfy the application condition. When an item satisfying the application condition is found, an advice message corresponding to the item is selected from the advice message column 414.
For example, when the recommended operation mode is determined to be the standard mode of the “late night only” mode, if the difference LD between the maximum amount of hot water used per day and the minimum amount of hot water used within the past week is 200 L or more (that is, usage method) If the application condition a of the item 413a in the analysis column 413 is satisfied), the item 414a in the advice message column 414 corresponding to the item 413a is used as an advice message “A. Hot water use tends to vary. Is selected. Alternatively, in the past week, when the remaining hot water amount LR at 11 pm is always 100 L or more and forced boiling has been performed, the application condition b of the item 413b in the usage analysis column 413 is satisfied. Therefore, from the item 414b in the advice message column 414 corresponding to the item 413b, B, “Forced boiling amount tends to be large. Furthermore, when the application conditions a and b are not satisfied and the set operation mode matches the recommended operation mode, the application condition c of the item 413c in the usage analysis column 413 is satisfied, so the item 413c From the item 414c in the corresponding advice message column 414, C “used well” is selected as the advice message. Furthermore, if none of the application conditions a to c is satisfied, the application condition d is satisfied, so the item “414d” in the advice message column 414 indicates “Please use the recommended operation mode” as an advice message. Selected.

  In addition, when the hot water amount moderation in the “Random” mode is selected as the recommended operation mode, the difference LD is 100 L or less, and the remaining hot water amount LR in the past week at midnight (23:00 to 7:00) Is always 20L or more and 50L or less, the application condition b of the item 413b in the usage analysis column 413 is satisfied, and therefore, from the item 414f of the advice message column 414 corresponding to the item 413f, the advice message “V” “It is recommended to use it as it is.” Is selected. On the other hand, when the amount of hot water in the “Omakase” mode is selected as the recommended operation mode, when the minimum remaining hot water amount LMIN is 20 L or less, the application condition e of the item 413j is satisfied, so the advice message column 414 corresponding to the item 413j From item 414j, E is selected as an advice message “There is an increase in the daytime due to running out of hot water. The item 413e in the usage analysis column 413 and the item 414e in the advice message column 414 are shown as one item for simplification. However, actually, the item 413e includes four items including any one of the application conditions a to d like the items 413a to 413d. The item 414e includes four items so that the advice messages A to D correspond to the application conditions a to d, respectively. The same applies to the items 413g to 413i and 414g to 414i.

  Similarly, also when other reference tables 501 and 601 are used, the recommended mode selection unit 355 finds an item that satisfies the application condition in the recommended operation mode analysis column, selects the recommended operation mode, and then In the usage analysis column, find an item that satisfies the applicable conditions and select an advice message. For example, a case will be described in which rebirth is selected as an item on which diagnosis is emphasized and the reference table 501 shown in FIG. 5 is selected. In this case, if the learning hot water storage amount LT is less than (370-β), neither the occurrence of reheating standby or reheating boiling has occurred in the past week, and the boiling temperature TP is 80 ° C. or higher and 90 ° C. or lower. As a recommended operation mode, the hot water mode of the “late night only” mode is selected as the recommended operation mode. In addition, said (beta) is a safety coefficient, for example, is set to 20L. Also, it is recommended that the learning hot water storage amount LT is less than (370-β), that neither the occurrence of reheating standby or reheating boiling has occurred in the past week, and the boiling temperature TP is 65 ° C. or higher and 79 ° C. or lower. As the operation mode, the standard mode of “midnight only” mode is selected as the recommended operation mode.

  When the recommended operation mode is “Late only at night” with hot water or standard, if the set operation mode matches the recommended operation mode (that is, the application condition g is satisfied), the advice message As a result, “Good use” of G is selected. On the other hand, when the set operation mode does not match the recommended operation mode (that is, when the application condition h is satisfied), “Use recommended operation mode” of H is selected as the advice message.

  On the other hand, when the learning hot water storage amount LT is (370-β) or more, or when a reheating standby or additional boiling has occurred in the past week, the recommended operation mode is selected according to the type of the set operation mode. For example, when the set operation mode is the “Omakase” mode with a large amount of hot water and there is a chasing standby occurrence, the “full tank” mode is selected as the recommended operation mode. In this case, I is selected as an advice message, “If you are going to enter a catch-up standby, we recommend you to increase the forced boiling in advance”.

In addition, when the set operation mode is an “automatic” mode other than a large amount of hot water and there is a catch-up waiting occurrence, a large amount of hot water in the “automatic” mode is selected as the recommended operation mode. In this case, if the set operation mode and the recommended operation mode match (that is, when the application condition g is satisfied), G is selected together with I as an advice message, and the set operation mode and recommended operation mode are When they do not match (that is, when the application condition h is satisfied), H is selected together with I as an advice message.
Furthermore, if the set operation mode is “Omakase” mode with a small amount of hot water, and neither a stand-by standby operation nor a reheating boiling has occurred in the past week, the “Omakase” mode with a small amount of hot water is selected as the recommended operation mode. Is done. In this case, G is automatically selected as the advice message. In other cases, the amount of hot water in the “Random” mode is selected as the recommended operation mode. Then, it is examined whether the application condition g or h is satisfied as usage analysis. When it is determined that g is satisfied, the message G is selected as the advice message. When it is determined that g is satisfied, the message H is selected as the advice message.

  Further, a case where the amount of hot water is selected as an item placing importance on diagnosis and the reference table 601 shown in FIG. 6 is selected will be described below. In this case, if the learning hot water storage amount LT is less than (370-β), the minimum remaining hot water amount LMIN in the past week is more than 100 L, and the boiling temperature TP is 80 ° C. or more and 90 ° C. or less, the recommended operation mode As a recommended operation mode, the hot water mode of the “late night only” mode is selected. Note that β is a safety factor similar to that used in the recommended operation mode analysis of the reference table 501, and is set to 20 L, for example. Further, if the learning hot water storage amount LT is less than (370-β), the minimum remaining hot water amount LMIN in the past week is more than 100 L, and the boiling temperature TP is 65 ° C. or more and 79 ° C. or less, the recommended operation mode is “ The standard mode of “Midnight only” mode is selected as the recommended operation mode.

  When the recommended operation mode is “Late only at night” with hot water or standard, if the set operation mode matches the recommended operation mode (that is, the application condition j is satisfied), the advice message J's “Used well” is selected. On the other hand, when the set operation mode and the recommended operation mode do not match (that is, when the application condition k is satisfied), “Use recommended operation mode” of K is selected as the advice message.

  On the other hand, if the learning hot water storage amount LT is (370-β) or more or the minimum remaining hot water amount LMIN in the past week is 100 L or less, the recommended operation mode is selected according to the type of the set operation mode and the minimum remaining hot water amount LMIN. Is done. For example, when the set operation mode is “Omakase” mode with a large amount of hot water and the minimum remaining hot water amount LMIN is less than 100 L, or the set operation mode is “full tank” mode and the minimum remaining hot water amount LMIN is 100 L or more and less than 150 L, the recommended operation mode is “ The “full” mode is selected. In this case, if the maximum value of the amount of hot water used per day is greater than (average amount of hot water used per day for the past week + 200 L) and the minimum remaining hot water amount LMIN is less than 50 L (that is, application conditions for usage analysis) If L is satisfied), “I recommend the full tank mode when the customer uses more than usual” is selected as the advice message. When the application condition l is not satisfied and the application condition j is satisfied, J is selected as the advice message. When the application condition k is satisfied, K is selected as the advice message.

  Further, if the set operation mode is the “automatic” mode other than the hot water amount and the minimum remaining hot water amount LMIN is less than 100 L, the hot oil amount in the “automatic” mode is selected as the recommended operation mode. In other cases, the amount of hot water in the “Random” mode is selected as the recommended operation mode. Then, when the amount of hot water or the amount of hot water in the “Omakase” mode is selected as the recommended operation mode, the application conditions l, j, and k are sequentially examined as usage analysis. Then, any one of the messages L, J, and K corresponding to the satisfied one of the application conditions l, j, and k is selected as the advice message.

  Note that, as described above, each reference table involves the determination of conditional branching as an application condition. Therefore, each reference table is mounted by being directly incorporated in a program module that realizes the recommended mode selection unit 355.

  The storage unit 36 is configured by a nonvolatile memory, a magnetic disk, an optical disk, or the like, and stores various information and programs used by the control unit 35. Specifically, the log information created by the state monitoring unit 352, the above-described operation reference amount, and the like are stored.

  The operation display unit 37 is constituted by, for example, a remote control device that performs infrared communication with the control unit 35. Alternatively, it may be electrically connected to the control unit 35 through a communication wire. The operation display unit 37 includes a display unit configured by a plurality of operation buttons and a liquid crystal display, which function as a user interface and generate an operation signal. Then, the operation display unit 37 transmits a predetermined operation signal to the control unit 35 when the user presses the operation button. The operation display unit 37 displays various information on the display unit based on the notification signal received from the control unit 35. The operation signal is, for example, an on / off signal of the hot water supply system 1, a signal indicating a set temperature of hot water taken from the tank unit 20, a forced boiling execution signal, a hot water filling execution signal to the bathtub 7, a reheating An instruction signal or the like.

Furthermore, the operation display part 37 performs the operation mode setting of the hot water supply system 1 and the operation mode diagnosis instruction. Then, the diagnosis result of the operation mode is displayed.
FIG. 7A shows a schematic diagram of the operation display unit 37 when the operation mode diagnosis execution instruction is given. In the display area 371 of the operation display unit 37, items (energy saving, reheating, hot water amount) to be emphasized at the time of diagnosis are displayed. When the user operates an operation button provided at the lower part of the operation display unit 37 and selects any one of the items, the operation display unit 37 changes the selected item to the control unit 35. A uniquely corresponding diagnosis type signal and diagnosis execution signal are transmitted. Then, the control unit 35 starts diagnosis of the operation mode. When the diagnosis result is obtained, the diagnosis result is sent from the control unit 35 to the operation display unit 37.
FIG. 7B shows a schematic diagram of the operation display unit 37 when the operation mode diagnosis result is displayed. In the display area 371 of the operation display unit 37, items emphasized at the time of diagnosis (in the example in the figure, energy saving is emphasized), a recommended operation mode (in the example in the figure, the midnight only mode standard mode), and an advice message are displayed. Is done. By referring to the display, the user can easily select an appropriate operation mode for the items he / she attaches importance to the hot water supply system 1 and can improve the usage.

  Below, the process at the time of the operation mode diagnosis of the hot water supply system 1 which concerns on this invention is demonstrated using FIG. The operation is controlled according to a program read by the control unit 35 of the tank unit 20.

  As shown in FIG. 8, when a diagnosis execution instruction is given through the operation display unit 37, first, the control unit 35 acquires a diagnosis type signal indicating a diagnosis item emphasized by the user from the operation display unit 37 (step S101). . Then, the recommended mode selection unit 355 of the control unit 35 selects a reference table according to the acquired diagnosis type signal (step S102). Next, the operation reference amount calculation means 353 of the control unit 35 calculates each operation reference amount based on the log information of the past one week in order to select the recommended operation mode in the selected reference table (step S103). Further, the actual usage amount calculation unit 354 of the control unit 35 calculates the actual usage amount based on the log information for the past one week in order to select the recommended operation mode and the advice message (step S104). In addition, about the calculation method of each driving | operation reference amount and use performance amount, it is as having mentioned above. And the recommendation mode selection means 355 selects the applicable item from the selected reference table based on the hot water storage standard information and the set operation mode, and sets the operation mode associated with the item as the recommended operation mode. Select (step S105). In addition, for example, when the diagnosis mode is focused on the tracking, the tracking information regarding the tracking is also used for selecting the recommended operation mode. Next, the recommended mode selection unit 355 selects a corresponding item from the selected reference table based on the usage status information related to the amount of hot water used, the set operation mode and the recommended operation mode, and associates the selected item with the selected item. The selected advice message is selected (step S106). Finally, the selected recommended operation mode and advice message are sent to the operation display unit 37 and displayed on the display unit (step S107).

  As described above, the hot water supply system according to the present invention analyzes the actual usage and usage of the hot water supply system by the user based on fluctuations in the amount of hot water used every day, and compares it with an analysis pattern prepared in advance. By doing this, it is possible to present an operation mode and advice that are considered optimal to the user. Furthermore, since the conditions regarding the selection of the recommended operation mode and the advice message are changed in accordance with the user's preference or the items to be emphasized, the user can select an optimum operation mode that suits his / her preference for the hot water supply system according to the present invention. It becomes easy to select, and an increase in meaningless operating cost can be avoided.

The embodiments described above are for explaining the present invention, and the present invention is not limited to these embodiments. For example, in the above embodiment, the hot water supply system only displays the recommended operation mode and the advice message when a diagnosis instruction is given, but the recommended operation mode is different from the operation mode currently being executed. The control unit 35 may be provided with operation mode selection means for automatically changing the operation mode to the recommended operation mode.
In addition, the operation mode diagnosis is not performed when instructed through the operation display unit, but is automatically executed when a predetermined period (for example, one week) elapses from the previous diagnosis, for example. Good. Furthermore, the application conditions of the recommended operation mode analysis or the usage analysis described in each reference table and the content of the advice message are not limited to those described above. Furthermore, in the above embodiment, the operation reference amount and the actual usage amount are calculated using data for the past week based on the calculation time. However, the period of data used for calculating these amounts is not limited to one week, and may be, for example, 10 days, 2 weeks, or 1 month.

  The present invention can also be applied to a floor heating system using a heat pump hot water supply system. In this case, floor heating is added as an item to be emphasized when diagnosing the operation mode, and a reference table corresponding to the item is added to the recommended mode selection unit 355. Then, in order to make a diagnosis with emphasis on floor heating, the amount of heat that can be used for floor heating is calculated based on the amount of remaining hot water during use of floor heating as the operation reference amount for determining the recommended operation mode. Then, for example, whether or not the floor heating usable heat amount is observed to be below the required heat amount determined by the floor heating set temperature and the heating area within the past one week from the diagnosis of the recommended operation mode is referred to as a reference table. It can be set as one of the application conditions in the recommended operation mode analysis column. Then, a recommended operation mode column is created so that the “full tank” mode is selected as the recommended operation mode when the condition is satisfied. Similarly, the floor heating usage time within the past week from the time of diagnosis is obtained as the actual usage amount, and whether or not the floor heating usage time is all midnight hours is indicated in the recommended operation mode analysis column of the reference table. It may be set as one of the application conditions. Then, a recommended operation mode field is created so that the “automatic” mode is selected as the recommended operation mode when the condition is satisfied. Furthermore, when the set operation mode is the “full tank” mode and whether or not the floor heating usable heat amount is observed to be lower than the required heat amount, the application condition in the usage analysis column of the reference table is set. It can be set as one. Then, an advice message column can be created so that a message such as “I recommend reducing the floor heating usage time” is selected as an advice message when the condition is satisfied.

  As described above, the hot water supply system according to the present invention is appropriately optimized within the scope of the present invention.

1 is a configuration block diagram of a hot water supply system to which the present invention is applied. It is a functional block diagram of the control part of a tank unit. It is a systematic diagram of the operation mode which can be used with the hot water supply system to which this invention is applied. 6 is a reference table of recommended operation modes and advice messages when importance is placed on energy saving. It is a reference table of the recommended operation mode and advice message when emphasis is placed on repulse. It is a reference table of the recommended operation mode and advice message when placing importance on the amount of hot water that can be used. (A) is the schematic of the display screen of the operation display part at the time of driving mode diagnosis execution instruction, (b) is the schematic of the display screen of the operation display part at the time of driving mode diagnosis result display. It is a flowchart which shows the operation | movement procedure of the recommended operation mode diagnostic process of the hot-water supply system to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water supply system 5 Bathtub piping 6 Hot water supply piping 7 Bathtub 8 Hot water tap 9 Water supply piping 10 Heat pump unit 20 Tank unit 21 Hot water storage tank 24 Bathtub flow rate counter 27 Water level sensor 29 Bathtub circulation temperature thermistor 31 Hot water supply temperature thermistor 32 Hot water supply counter 33a-33f Remaining tank Hot water thermistor 34 Tap water temperature thermistor 35 Control unit 351 Hot water supply control means 352 State monitoring means 353 Operation reference amount calculation means 354 Used performance amount calculation means 355 Recommended mode selection means 36 Storage part 37 Operation display part

Claims (11)

A tank having a heat pump unit (10) for heating hot water and a hot water storage tank (21) for storing heated hot water, and discharging hot water from the hot water storage tank (21) to a bathtub (7) or a hot water tap (8) A hot water supply system having a unit (20),
An operation display unit (37) having a user interface;
A tapping amount measuring section (24, 32) for measuring a tapping amount from the hot water storage tank (21);
Temperature measuring units (29, 31) for measuring at least the temperature of hot water discharged from the hot water storage tank (21);
A storage unit (36) for storing the amount of hot water measured by the hot water measurement unit (24, 32) and the hot water temperature measured by the temperature measurement unit (29, 31);
A controller that controls the operation of the hot water supply system according to an operation mode selected from a plurality of operation modes that define the operation of the hot water supply system;
An operation reference amount calculation for calculating an operation reference amount for determining a condition for increasing the amount of hot water stored in the hot water storage tank (21) based on the amount of discharged hot water and the hot water temperature within a predetermined period stored in the storage unit (36). Means (353);
Based on the amount of hot water and the hot water temperature within the predetermined period, the actual usage amount calculating means (354) for calculating the actual usage amount representing the actual usage of the hot water supply system;
There are a plurality of first application conditions corresponding to recommended operation modes to be presented to the user, and each of the first application conditions is based on the operation reference amount and the actual usage amount or the selected operation mode. And a recommended mode selection means (355) for selecting the recommended operation mode corresponding to the first application condition determined to be satisfied, and determining whether or not the first recommended operation mode is satisfied. A control unit (35) to be displayed on the display unit (37);
A hot water supply system characterized by comprising:   The recommended mode selection means (355) has a plurality of second application conditions corresponding to advice information to be presented to the user, and the selected recommended operation mode, the actual usage amount, or the selected operation mode. On the basis of each of the second application conditions is determined, the advice information corresponding to the second application conditions determined to be satisfied is selected, and the control unit (35), The hot water supply system according to claim 1, wherein the selected advice information is displayed on the operation display unit (37).   The recommended mode selection means (355) has a plurality of diagnosis modes determined according to items emphasized by the user, and based on the diagnosis type signal received from the operation display unit (37), the plurality of diagnosis modes. The hot water supply system according to claim 2, wherein any one of the modes is selected, and the first application condition or the second application condition is changed according to the selected diagnosis mode.   When the recommended mode selection unit (355) selects a mode that places importance on reducing the operating cost of the hot water supply system as the diagnostic mode, the operation reference amount used in the first application condition is the hot water storage tank (21 The hot water supply system according to claim 3, including a target accumulated heat amount that represents the amount of hot water accumulated in () as a heat amount, and a boiling temperature that is a target attainment temperature when the hot water is heated by the heat pump unit (10).   When the recommended mode selection unit (355) selects a mode in which reheating of hot water stored in the bathtub (7) is important as the diagnostic mode, the operation reference amount used in the first application condition is A learning hot water storage amount that is a standard hot water storage amount in the hot water storage tank (21), and a boiling temperature that is a target attainment temperature when heating the hot water in the heat pump unit (10), and in the first application condition The actual usage amount used includes an index indicating whether or not a reheating standby state in which hot water stored in the bathtub (7) cannot be reheated using the remaining hot water in the hot water storage tank (21) is generated, The hot water supply system according to claim 3.   When the recommended mode selection means (355) selects a mode that places importance on the amount of hot water that can be used as the diagnostic mode, the operation reference amount used in the first application condition is the standard in the hot water storage tank (21). The amount of actual use used in the first application condition includes a learning hot water storage amount that is a hot water storage amount and a boiling temperature that is a target attainment temperature when heating hot water in the heat pump unit (10). The hot water supply system according to claim 3, comprising a minimum remaining hot water amount that is a minimum value of the usable hot water amount stored in the hot water storage tank (21) during the predetermined period.   The hot water supply system according to claim 4, wherein the actual usage amount used in the second application condition is an index representing variation in the amount of hot water used per day in the predetermined period.   The hot water supply system according to any one of claims 4 to 6, wherein the second application condition includes whether or not the selected operation mode matches the recommended operation mode. A tank having a heat pump unit (10) for heating hot water and a hot water storage tank (21) for storing heated hot water, and discharging hot water from the hot water storage tank (21) to a bathtub (7) or a hot water tap (8) From the unit (20), the operation display unit (37) having a user interface, the hot water amount measuring unit (24, 32) for measuring the amount of hot water discharged from the hot water storage tank (21), and at least the hot water storage tank (21) A temperature measuring unit (29, 31) for measuring the temperature of the hot water discharged from the hot water, the amount of hot water measured by the hot water measuring unit (24, 32) and the hot water measured by the temperature measuring unit (29, 31) Operation mode diagnosis of a hot water supply system having a storage unit (36) for storing temperature and a control unit (35) for controlling the operation in accordance with an operation mode selected from a plurality of operation modes for defining operation A law,
Calculating an operation reference amount for determining an increase condition of hot water to be stored in the hot water storage tank based on the amount of hot water and the hot water temperature within a predetermined period stored in the storage unit (36);
Calculating an actual usage amount representing the actual usage of the hot water supply system based on the amount of hot water and the hot water temperature within the predetermined period;
The plurality of first application conditions corresponding to the recommended operation mode to be presented to the user are satisfied for each of the first application conditions based on the operation reference amount and the actual usage amount or the selected operation mode. Selecting a recommended operation mode corresponding to the first application condition determined to be satisfied,
Displaying the selected recommended operation mode on the operation display unit (37);
An operation mode diagnosis method characterized by comprising: For a plurality of second application conditions corresponding to the advice information presented to the user, based on the selected recommended operation mode and the actual usage amount or the selected operation mode, each of the second application conditions Determining whether to satisfy each, and selecting advice information corresponding to the second application condition determined to be satisfied;
Displaying the selected advice information on the operation display unit (37);
The operation mode diagnosis method according to claim 9, comprising: Obtaining a diagnosis type signal from the operation display unit (37);
Based on the diagnosis type signal, select any one of a plurality of diagnosis modes determined according to the items that the user attaches importance to, and depending on the selected diagnosis mode, the first application condition or Changing the second application condition;
The operation mode diagnosis method according to claim 10, comprising:

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