JP6508019B2 - Hot water storage system - Google Patents

Description

  The present invention relates to a hot water storage type hot water supply system.

  The remote controller provided in the conventional hot water storage type hot water supply system disclosed in the following Patent Document 1 includes a display capable of displaying a graph of usage of hot water and usage target value setting means for setting a target value of usage. Prepare. The said display displays the graph of usage, and the parameter | index of the said target value in the standby screen which displays preset temperature. According to Patent Document 1, this makes it possible for the user to constantly compare the usage of the hot water with the target value and to promote the suppression of the usage on the day. .

JP, 2014-155031, A

  In the storage type hot water supply system of Patent Document 1, when the user recognizes that it is necessary to save the hot water, the user may not know how or how much the hot water should be saved. is there. For this reason, usability is not always good.

  The present invention has been made to solve the problems as described above, and it is an object of the present invention to provide a convenient hot water storage type hot water supply system in a situation where it is necessary to save hot water.

  A storage type hot water supply system according to the present invention uses a hot water storage tank, means capable of generating hot water supplied to a bathtub using the hot water storage tank, and uses hot water from a hot water storage tank Means that can be produced, the amount of hot water supplied to the bath from the beginning of the day to the present, or the total amount of heat of the hot water, the amount of hot water supplied to the hot water supply pipe from the beginning of the day to the present The total amount of use including the total amount of heat of the hot water, or the maximum amount of hot water continuously supplied to the hot water supply pipe from the beginning of the day to the present, or the maximum continuous use amount which is the heat amount of the hot water Means, control means for controlling the bath function that performs hot water supply to the bath or repressing the bath, input means that allows the user to input the execution request of the bath function, and saving criteria for total usage or maximum continuous usage. Inform the user if it exceeds Comprising a knowledge unit, the control means is greater than the total amount or savings reference maximum continuous usage, and, if the execution request is input to the input means is for holding the execution of the bath functions.

  ADVANTAGE OF THE INVENTION According to the storage type hot-water supply system of this invention, it becomes possible to improve usability in the condition which saving of hot water is required.

FIG. 1 is a configuration diagram showing a hot water storage type hot water supply system according to Embodiment 1. FIG. 2 is a view showing an appearance of a remote control device provided in the hot water storage type hot water supply system of the first embodiment. 5 is a flowchart of a routine executed in the hot water storage type hot water supply system of the first embodiment. It is a figure which shows the example of the hardware constitutions of the control apparatus with which the hot water storage type hot-water supply system of Embodiment 1 is equipped. It is a figure which shows the other example of the hardware constitutions of the control apparatus with which the hot water storage type hot-water supply system of Embodiment 1 is equipped.

  Hereinafter, embodiments will be described with reference to the drawings. Elements common to the respective drawings are denoted by the same reference numerals, and overlapping descriptions will be simplified or omitted. The number, arrangement, orientation, shape, and size of the devices, instruments, parts and the like in the present invention are not limited in principle to the number, arrangement, orientation, shape, and size shown in the drawings.

Embodiment 1
FIG. 1 is a block diagram showing a hot water storage type hot water supply system according to a first embodiment. As shown in FIG. 1, the hot water storage type hot water supply system 35 according to the first embodiment includes a heat pump unit 7, a tank unit 33, a control device 36, and a remote control device 44. The tank unit 33 is equipped with various devices including the hot water storage tank 8.

  The heat pump unit 7 is a unit including a refrigerant circuit in which the compressor 1, the water refrigerant heat exchanger 3, the pressure reducing device 4 and the air heat exchanger 6 are annularly connected by the refrigerant pipe 5, and a housing that accommodates these devices. A case 2 is provided. The heat pump unit 7 can perform the operation of the heat pump cycle, that is, the refrigeration cycle, by the refrigerant circuit. The compressor 1 compresses a refrigerant gas. The water refrigerant heat exchanger 3 can heat water by exchanging heat between the high-temperature high-pressure refrigerant compressed by the compressor 1 and the water. The pressure reducing device 4 reduces the pressure of the refrigerant that has passed through the water refrigerant heat exchanger 3. The decompression device 4 may be, for example, an expansion valve or a capillary tube. The air heat exchanger 6 can evaporate the refrigerant by exchanging heat between the low pressure refrigerant decompressed by the decompression device 4 and the outside air. The heat pump unit 7 may include a blower (not shown) for blowing the outside air to the air heat exchanger 6. Further, the heat pump unit 7 detects an outside temperature, an inlet temperature sensor 39 that detects the water temperature upstream of the water refrigerant heat exchanger 3, an outlet temperature sensor 40 that detects the water temperature downstream of the water refrigerant heat exchanger 3, and An outside air temperature sensor 41 is provided.

  The tank unit 33 and the heat pump unit 7 are connected via the heat pump forward pipe 14, the heat pump return pipe 15, and electrical wiring (not shown). The tank unit 33 and the bathtub 30 are connected via a blowout pipe 27 and a blowout pipe 28.

  The control device 36 is an example of control means for controlling the operation and operation of the hot water storage type hot water supply system 35. The actuators and sensors included in the hot water storage type hot water supply system 35 are electrically connected to the control device 36. In the illustrated configuration, the control unit 36 is mounted on the tank unit 33. The control device 36 may control the heat pump unit 7 directly or may indirectly control the heat pump unit 7 by communicating with a control device (not shown) mounted on the heat pump unit 7. Good.

  The heat pump unit 7 is an example of a heating unit that heats water. The heating means in the present invention is not limited to a heat pump type heating device such as the heat pump unit 7. For example, an electric heater, a heating device using solar heat, fuel (for example, gas, kerosene, heavy oil, coal Or the like), or a plurality of heating devices may be included.

  The remote control device 44 is connected to the control device 36 so as to enable data communication in both directions. The remote control device 44 is an example of a user interface. The remote control device 44 is installed, for example, in a bathroom, a kitchen or the like. Two or more remote control devices 44 installed at different places may be provided. Details of the remote control device 44 will be described later.

  The tank unit 33 includes, in addition to the hot water storage tank 8, devices such as various pipes, valves, pumps, heat exchangers, and sensors, which will be described later, and a unit case 32 which is a housing for housing these devices. The hot water storage tank 8 stores hot and cold water. A third water supply pipe 9 c is connected to the water inlet 8 a provided at the lower part of the hot water storage tank 8. Low temperature water supplied from a water source such as a water supply to the first water supply pipe 9a is adjusted to a predetermined pressure by the pressure reducing valve 31, and then flows into the hot water storage tank 8 through the third water supply pipe 9c. A first hot water supply pipe 13 and a second hot water supply pipe 21 are connected to a hot water introduction outlet 8 d provided at the upper part of the hot water storage tank 8. The hot water heated by the heat pump unit 7 passes through the first hot water supply pipe 13 and flows into the hot water storage tank 8 from the hot water introduction outlet 8 d. In the hot water storage tank 8, a temperature stratification is formed in which the upper side is high temperature and the lower side is low temperature, and hot water is stored. A plurality of hot water storage temperature sensors 42 and 43 are attached to the surface of the hot water storage tank 8 at different heights. The temperature distribution of hot and cold water in the hot water storage tank 8 can be detected by the hot water storage temperature sensors 42 and 43. The control device 36 can grasp the remaining hot water amount and the heat storage amount in the hot water storage tank 8 based on the temperature distribution. Although the number of stored hot water temperature sensors is two in the illustrated configuration, three or more stored hot water temperature sensors may be provided.

  The bath heat exchanger 20 is a heat exchanger that heats bath water led from the bath 30 using heat of hot water supplied from the hot water storage tank 8 or the heat pump unit 7. A part of the fluttering pipe 27 and the fluro return pipe 28 is inside the tank unit 33. A heat exchanger 20 for the bath is connected to the flow path pipe 27 and the flow path return pipe 28 inside the tank unit 33. A bath circulation circuit for circulating bath water stored in the bath 30 is formed by the bath heat exchanger 20, the forward pipe 27 and the return pipe 28. In the middle of the bath return pipe 28, a bath circulation pump 29 for circulating bath water in the bath circulation circuit and a bath return temperature sensor 38 for detecting the temperature of the bath water discharged from the bath 30 are disposed. In the middle of the blowout pipe 27, a blowout temperature sensor 37 for detecting the temperature of the bath water coming out of the blow heat exchanger 20 is disposed.

  The three-way valve 11 is a flow path switching unit having an a port and a b port into which hot water flows and a c port from which the hot water flows out. The three-way valve 11 can switch the flow path between two paths, ie, the a-c path and the b-c path. The four-way valve 18 is a flow path switching unit having b and c ports into which hot and cold water flows, and a and d ports from which hot and cold water flows out. The four-way valve 18 can switch the flow path to four paths, that is, the a-b path, the a-c path, the b-d path, and the cd path. The water outlet pipe 10 connects the water outlet 8 b provided at the lower part of the hot water storage tank 8 and the a port of the three-way valve 11.

  A portion of the heat pump forward pipe 14 is inside the tank unit 33 and is connected to the c port of the three-way valve 11. A water pump 12 is disposed in the middle of the heat pump incoming pipe 14 inside the tank unit 33. A temperature sensor 48 for detecting the temperature of the circulating hot water is disposed downstream of the water pump 12. The heat pump forward pipe 14 extends to the outside of the tank unit 33 and is connected to the water inlet of the heat pump unit 7. A part of the heat pump return pipe 15 is inside the tank unit 33 and one end is connected to the c port of the four-way valve 18. The heat pump return pipe 15 extends to the outside of the tank unit 33 and is connected to the water outlet of the heat pump unit 7.

  The first hot water supply pipe 13 connects between the d port of the four-way valve 18 and the hot water inlet / outlet 8 d at the top of the hot water storage tank 8. The first bypass pipe 16 connects between the a port of the four-way valve 18 and the hot water inlet 8 c of the hot water storage tank 8. In the present embodiment, the hot water inlet 8 c is at a position above the positions of the water inlet 8 a and the water outlet 8 b and below the position at a half height of the hot water storage tank 8. The hot water introduction pipe 20 a branches from the middle of the first water supply pipe 13 and is connected to the primary side inlet of the heat exchanger 20 for bath. The hot water outlet pipe 20 b connects between the primary side outlet of the heat exchanger for bath 20 and the b port of the three-way valve 11. The second bypass pipe 17 branches from the heat pump receiving pipe 14 downstream of the water pump 12 and the temperature sensor 48 and is connected to the b port of the four-way valve 18.

  The three-way valve 11 can be switched to two flow path modes, in which the water outlet pipe 10 communicates with the heat pump receiving pipe 14 and the hot water outlet pipe 20 b communicates with the heat pump receiving pipe 14. In the four-way valve 18, the heat pump return pipe 15 communicates with the first hot water supply pipe 13, the heat pump return pipe 15 communicates with the first bypass pipe 16, and the first bypass pipe 16 communicates with the second bypass pipe 17. It is switchable to four flow path forms of the form and the form in which the first hot water supply pipe 13 communicates with the second bypass pipe 17.

  One end of the first water supply pipe 9a is connected to a water source such as a water supply. The other end of the first water supply pipe 9 a is connected to the second water supply pipe 9 b and the third water supply pipe 9 c via the pressure reducing valve 31. The downstream side of the second water supply pipe 9b is branched into two, and is connected to the first inlet of the hot-water mixing valve 22 and the first inlet of the bath mixing valve 23, respectively. The downstream portion of the second hot water supply pipe 21 is branched into two, and is connected to the second inlet of the hot water supply mixing valve 22 and the second inlet of the bath mixing valve 23, respectively. The hot water supply pipe 24 connects between the outlet of the hot water supply mixing valve 22 and the hot water supply valve 34. For example, an external hot water supply pipe (not shown) connected to a hot water supply terminal such as a shower or currant is connected to the hot water supply plug 34. In the middle of the hot water supply pipe 24, a hot water supply flow rate sensor 46 for detecting the flow rate of hot water passing through the hot water supply pipe 24 and a hot water supply temperature sensor 47 for detecting the temperature of hot water passing through the hot water supply pipe 24 are arranged. When hot water is supplied to the hot water supply terminal, high temperature water supplied from the hot water introduction outlet 8 d of the hot water storage tank 8 by the second hot water supply pipe 21 and low temperature water supplied from the second water supply pipe 9 b are mixed for hot water supply Hot water whose temperature is controlled by being mixed by the valve 22 is supplied to the hot water supply pipe 24. The hot water supply mixing valve 22 can generate hot water at a target temperature, that is, hot water at a temperature set by the user with the remote control device 44 by adjusting the flow ratio of high temperature water and low temperature water.

  The upstream portion of the pouring pipe 25 is connected to the outlet of the mixing valve 23 for bath. The downstream portion of the pouring pipe 25 communicates with the middle of the fluttering pipe 27. In the middle of the filling pipe 25, a solenoid valve 26 for opening and closing the filling pipe 25 and a flow sensor 45 for detecting flow rate of hot water passing through the filling pipe 25 are disposed. The hot water storage type hot water supply system 35 of the present embodiment can perform an operation of supplying water to the bathtub 30. The operation of supplying water to the bathtub 30 is as follows. The bath solenoid valve 26 is opened. The temperature is adjusted by mixing the high temperature water supplied from the hot water inlet / outlet 8 d of the hot water storage tank 8 through the second water supply pipe 21 and the low temperature water supplied from the second water supply pipe 9 b by the mixing valve 23 for the bath. Hot water is supplied to the pouring pipe 25. The hot water is sent from the tank unit 33 to the bath 30 through the blow pipe 27 or the blow pipe 28. The bath mixing valve 23 can generate hot water of a target temperature, that is, hot water of a temperature set by the user with the remote control device 44 by adjusting the flow ratio of high temperature water and low temperature water. The operation of supplying water to the bathtub 30 is an example of the “bath function”.

  Next, a heat storage operation performed by the hot water storage type hot water supply system 35 of the first embodiment will be described. In the heat storage operation, it is as follows. The heat pump unit 7 and the water pump 12 are operated. The three-way valve 11 is in a form (a-c path) in which the water outlet pipe 10 and the heat pump receiving pipe 14 communicate with each other. The four-way valve 18 is in a form (cd path) in which the heat pump return pipe 15 and the first hot water supply pipe 13 communicate with each other. The water in the lower part of the hot water storage tank 8 is sent to the water refrigerant heat exchanger 3 of the heat pump unit 7 via the water outlet 8b, the water outlet pipe 10, the three-way valve 11, and the heat pump receiving pipe 14 by the water pump 12. Be The hot water heated to a high temperature while passing through the water refrigerant heat exchanger 3 passes through the heat pump return pipe 15, the four-way valve 18, the first hot water supply pipe 13 and the hot water introduction outlet 8d, and the upper portion in the hot water storage tank 8 Flow into With such heat storage operation, the hot water is stored from the top to the bottom in the hot water storage tank 8, whereby heat is accumulated in the hot water storage tank 8.

  Next, the reheating operation performed by the hot water storage type hot water supply system 35 of the first embodiment will be described. The reheating operation is an operation for heating or keeping warm the bath water in the bath 30. In reheating operation, it becomes as follows. The water pump 12 and the bath circulation pump 29 are operated. The three-way valve 11 is in a form (b-c path) in which the hot water outlet pipe 20b and the heat pump receiving pipe 14 communicate with each other. The four-way valve 18 is in a form (ab path) in which the first bypass pipe 16 and the second bypass pipe 17 communicate with each other. Bathtub water is drawn into the bath return pipe 28 from the inside of the bath tub 30 by the bath circulation pump 29 and is sent to the bath heat exchanger 20. Then, while passing through the bottom heat exchanger 20, the heated bath water returns to the inside of the bath 30 through the blowout pipe 27. The high temperature water drawn out from the upper part of the hot water storage tank 8 by the water pump 12 passes through the hot water inlet / outlet 8 d, a part of the first hot water supply pipe 13 and the hot water inlet pipe 20 a as a heat source fluid. Sent to Then, the heat source fluid whose temperature is lowered while passing through the bottom heat exchanger 20, that is, the inside warm water, is the hot water outlet pipe 20b, the three-way valve 11, a part of the heat pump forward pipe 14, the second bypass pipe 17, the four-way valve 18 Through the first bypass pipe 16 and the hot water inlet 8c, and return to the hot water storage tank 8. The reheating operation is an example of the "fune function".

  FIG. 2 is a view showing an appearance of remote control device 44 provided in hot water storage type hot water supply system 35 of the first embodiment. As shown in FIG. 2, the remote control device 44 includes an operation unit 44a, a display unit 44c, and a speaker 44d. The operation unit 44a includes a switch operated by the user. By operating the operation unit 44a of the remote control device 44, the user can perform an input operation such as, for example, a driving operation command or change of a setting value. The display unit 44c includes, for example, a liquid crystal display device, an organic EL display device, or the like. The display unit 44 c can notify the user by displaying information such as the state of the hot water storage type hot water supply system 35. Further, the remote control device 44 can notify the user of information by emitting voice or sound from the speaker 44 d. The switches provided in the operation unit 44a include, for example, a bath-pouring switch 44b.

  The user can input an execution request for the bath function by operating the operation unit 44a. For example, when the user desires the water filling operation to the bathtub 30, the user can input the execution request for the water filling operation by pressing the bathing switch 44b. The switches included in the operation unit 44a may further include a reheating switch 44e, an adding water switch 44f, and the like. When the user desires the reheating operation, the user can input a request for performing the reheating operation by pressing the reheating switch 44 e. When the user desires an adding water operation to additionally supply the hot water to the bathtub 30, the user can input a request for performing the adding water operation by pressing the addition water switch 44f.

  During the operation of supplying water to the hot water supply pipe 24 connected to the hot water supply plug 34, the control device 36 can detect the amount [L] of hot water supplied to the hot water supply pipe 24 based on the signal of the hot water flow sensor 46. For example, the control device 36 can detect the amount [L] of hot water supplied to the hot water supply pipe 24 by integrating the flow rate [L / sec] detected by the hot water supply flow rate sensor 46. Control device 36 stores the total amount of hot water [L] supplied to hot water supply pipe 24 from the start of the day to the present as hot water supply integrated hot water amount [L]. In the present specification, "the start of one day" does not necessarily mean midnight, but may be other predetermined time, such as 6 am or 7 am "the start of one day" It may be

  At the time of the operation of supplying water to the bathtub 30, the control device 36 can detect the amount [L] of hot water supplied to the bathtub 30 based on the signal of the flow rate sensor 45 for bath. For example, the control device 36 can detect the amount [L] of hot water supplied to the bathtub 30 by integrating the flow rate [L / sec] detected by the flow rate sensor 45 for bath. When the bathing operation is performed on the bath 30, when the amount [L] of hot water supplied to the bath 30 reaches the target bathing amount set by the user with the remote control device 44, the electromagnetic valve 26 for bath is closed, The pouring operation is finished. The controller 36 stores the total amount of hot water [L] supplied to the bathtub 30 from the beginning of the day to the present as the bath accumulated hot water amount [L].

  The control device 36 stores the amount including the hot-water-supply integrated hot-water amount [L] and the bath-integral-hot-water amount [L] as the total usage amount [L] from the beginning of the day to the present. The control device 36 may store the sum of the hot-water-reserved integrated hot water amount [L] and the bather integrated hot-water amount [L] as the total usage amount [L].

  The hot water storage type hot water supply system 35 of the present embodiment has a water saving function capable of prompting the user to save the amount of used hot water. The user can set on / off of the water saving function by operating the operation unit 44 a of the remote control device 44. The user may turn on the water saving function if he wishes to save the amount of water used. If the user does not want to save the amount of hot water, the user may set the water saving function off. When the water saving function is set to ON, the control device 36 compares the total usage [L] from the start of the day to the present with the preset water saving setting hot water [L]. Water saving setting hot water amount [L] is an example of a saving standard. If the total usage amount [L] exceeds the water saving setting amount [L], it can be considered that it is necessary to save the used water amount. The state where it is necessary to save the amount of used hot water is hereinafter referred to as "water saving state". When the total amount of use [L] exceeds the water saving setting hot water amount [L], the control device 36 notifies the user that the water is in the water saving state.

  In the present embodiment, control device 36 notifies the user of the water saving state by displaying, for example, a message, a graph, a figure, an icon, or a combination thereof on display portion 44c of remote control device 44. it can. The said display is hereafter called "water-saving state display." The message may be, for example, a content indicating that the amount of hot water used exceeds the saving standard, or a content that promotes saving of the amount of hot water used. The above graph may be, for example, a content representing the relationship between the hot-water-supply integrated hot-water amount [L] and the bath-integrated water amount [L] and the water-saving set hot-water amount [L]. By performing the water saving state display, it is possible to inform the user that the water saving state is in an easy-to-understand manner. Instead of the water saving state display or in combination with the water saving state display, the user may be notified of the water saving state by emitting the voice of the message or the alarm sound from the speaker 44 d of the remote control device 44.

  FIG. 3 is a flowchart of a routine executed in the hot water storage type hot water supply system 35 according to the first embodiment. FIG. 3 shows a control routine for the water saving function. In step S1 of FIG. 3, the control device 36 determines whether the water saving function is set to on or off. When the water saving function is set to off, the process proceeds from step S1 to step S4. At step S4, the control device 36 clears the water saving state flag. The water saving state flag is a flag indicating whether or not the water saving state is in effect.

  When the water saving function is set to ON in step S1, the process proceeds from step S1 to step S2. In step S2, the control device 36 determines whether the total usage amount [L] from the start of the day to the present exceeds the water saving setting hot water amount [L]. If the total amount used [L] exceeds the water saving set amount [L], the process proceeds from step S2 to step S3. In step S3, the control device 36 sets a water saving state flag. On the other hand, when the total usage amount [L] does not exceed the water saving setting hot water amount [L], the control device 36 proceeds from step S2 to step S4 and clears the water saving state flag.

  The process proceeds from step S3 or step S4 to step S5. In step S5, the control device 36 determines whether the water saving state flag is set. If the water saving state flag is set, the process proceeds from step S5 to step S6. In step S6, the control device 36 causes the display unit 44c of the remote control device 44 to display the water saving state display. After the water saving state display is performed, when a predetermined time has elapsed, the control device 36 may simplify or end the water saving state display. In step S6, the user may be notified by emitting a sound or an alarm sound from the speaker 44d of the remote control device 44.

  When the water saving state flag is not set in step S5, the process proceeds from step S5 to step S12. In step S12, the control device 36 does not display the water saving state display on the display unit 44c of the remote control device 44. When the water saving function is set to off, the water saving state flag is cleared in step S4, so the process goes to step S12. When the water saving function is set to off, the user does not want to save the amount of used water, so there is no need to implement the water saving state display. Also, even when the water saving function is set to ON, if the total usage amount [L] does not exceed the water saving setting hot water amount [L], the water saving state flag is cleared in step S4. , To this step S12. In this case, since it is not necessary to save the amount of used water, it is not necessary to carry out the water saving state display. After step S12, the control device 36 ends the current routine.

  On the other hand, when the water saving state display is performed in step S6, the process proceeds to step S7. In step S7, the control device 36 determines whether an operation for the user to input an execution request for the bath function has been added to the operation unit 44a of the remote control device 44. The operation is hereinafter referred to as "bath function operation". For example, in step S7, the control device 36 determines whether the bather switch 44b has been pressed. In step S7, the control device 36 may determine whether the reheating switch 44e has been pressed. In step S7, the control device 36 may determine whether the additional hot water switch 44f is pressed.

  If it is determined in step S7 that there is no bath function operation, that is, if the user has not input a bath function execution request, the control device 36 ends the current routine. On the other hand, if there is a bath function operation in step S7, that is, if the user inputs a bath function execution request, the process proceeds to step S8. In step S8, the control device 36 suspends the execution of the bath function without executing the bath function. In step S8, the control device 36 causes the display unit 44c of the remote control device 44 to display the water saving state again. In step S8, the user may be notified by emitting a sound or an alarm sound from the speaker 44d of the remote control device 44.

  As described above, in the present embodiment, when the total usage amount [L] exceeds the water saving setting water amount [L], that is, when the water saving state is established, the user is requested to execute the bath function. Does not execute the bath function requested by the user and suspends the execution of the bath function. With the execution of the bath function suspended, the user may be discouraged from using the bath function. The following effects can be obtained by the user being discouraged from using the bath function. First, the amount of hot water used can be saved. Second, it is possible to reliably suppress the occurrence of the hot water shortage of the hot water storage tank 8 which is not expected by the user. Third, the user is easy to use because it can easily know that the hot water needs to be saved if the execution of the requested bath function is suspended.

  It should be noted that the bath function to be reserved for execution at step S8 may be only the water filling operation, only the refueling operation, or only the addition water operation, the water filling operation, the refueling operation, and the addition Any two of the hot water movements may be used, or all three of them may be used.

  In the present embodiment, when the execution of the bath function is suspended in step S8, the water saving state display is performed again on the display unit 44c of the remote control device 44, or an audio or an alarm from the speaker 44d of the remote control device 44 By emitting a sound or the like, the user can be notified again of the state of water saving. Therefore, it is possible to prompt the user to discourage the use of the bath function. Moreover, it can suppress reliably that a user misunderstands that it may be a failure of the storage hot water supply system 35.

  The process proceeds from step S8 to step S9. In step S9, the control device 36 again determines whether the user has added the bath function operation to the operation unit 44a of the remote control device 44. If it is determined in step S9 that there is no bath function operation, that is, if the user has not input a bath function execution request, the determination in step S9 is performed again. If it is determined in step S9 that there is a bath function operation, that is, if the user inputs a bath function execution request, the process proceeds to step S10. In step S10, the control device 36 ends the water saving state display on the display unit 44c of the remote control device 44. The process proceeds from step S10 to step S11. In step S11, the control device 36 executes the bath function requested by the user.

  As described above, in the present embodiment, when the execution request for the bath function is input again from the user after the execution of the bath function is suspended in step S8, the control apparatus 36 executes the bath function. Therefore, according to the present embodiment, the following effects can be obtained. Even if the user temporarily suspends the execution of the bath function and the user does not want to use the bath function, the user can use the bath function, so that the user's request can be satisfied. In this case, the user has reentered the execution request for the bath function after understanding that the user is in a water-saving state. Therefore, even if the hot water storage tank 8 runs out of water, the user can anticipate it.

  In the present embodiment, the user can use the hot water of the hot water supply pipe 24, that is, the hot water supplied to the hot water supply terminal such as a shower, a caran, etc., even when the control device 36 suspends the execution of the bath function in step S8. is there. Therefore, it is possible to save the amount of used hot water while maintaining the convenience.

  In the present embodiment, when the water saving function is not required, the user can set the water saving function to OFF so that the total usage amount [L] exceeds the water saving setting hot water amount [L]. It is possible to set in advance that execution of the bath function is not suspended. This can improve the user's convenience when the user does not want to save the amount of used water. However, the present invention may not be able to turn off the water saving function.

  The value of the saving criteria such as the water saving setting hot water amount [L] may be changeable. For example, the value of the saving reference may be arbitrarily set by the user with the remote control device 44. Alternatively, the value of the saving criterion may be a predetermined value previously stored in the controller 36. The user may select the value of the saving reference from among a plurality of different values stored in advance in the control device 36 by the remote control device 44.

  In the present embodiment, the water saving function is implemented based on comparison of the total usage amount [L] including the hot-water supply accumulated hot water volume [L] and the bath accumulated water volume [L] with the water saving setting hot water volume [L] as a saving standard. However, instead of the comparison, similar effects to the present embodiment can be obtained by the following modification.

  (Modification 1) The total of the heat quantity [J or cal] of the hot water supplied to the hot water supply pipe 24 from the beginning of the day to the present, and the heat quantity of the hot water supplied to the bathtub 30 from the start of the day to the present [ The total amount of use [J or cal] including the sum of J or cal] may be compared with the amount of heat serving as a saving standard [J or cal]. The heat quantity of the hot water supplied to the hot water supply pipe 24 can be calculated from the flow rate detected by the hot water supply flow rate sensor 46 and the temperature detected by the hot water supply temperature sensor 47. The heat quantity of the hot water supplied to the bath 30 can be calculated from the flow rate detected by the flow sensor 45 for bath and the temperature detected by the temperature sensor 37 or the temperature sensor 38 for back flow.

  (Modification 2) The maximum continuous use amount [L], which is the maximum amount of hot water continuously supplied to the hot water supply pipe 24 from the beginning of the day to the present, is compared with the amount serving as a saving criterion [L] You may The control device 36 can detect the maximum continuous use amount [L] by, for example, the following. The controller 36 can detect continuous hot water supply to the hot water supply pipe 24 by the signal of the hot water supply flow rate sensor 46. Control device 36 detects the continuous use amount [L] by integrating the flow rate [L / sec] detected by hot water supply flow rate sensor 46 at the time of continuous hot water supply to hot water supply pipe 24 it can. The control device 36 updates the maximum continuous use amount [L] when the newly detected continuous use amount [L] exceeds the maximum continuous use amount [L].

  (Modification 3) The maximum continuous use amount [J or cal] which is the maximum heat quantity of hot water continuously supplied to the hot water supply pipe 24 from the beginning of the day to the present, and the heat quantity [J or cal ] May be compared. The control device 36 performs maximum continuous use from the flow rate [L / sec] detected by the hot water flow sensor 46 and the temperature detected by the hot water temperature sensor 47 during continuous hot water supply to the hot water supply pipe 24 The quantity [J or cal] can be calculated.

  In the above-mentioned second modification or the third modification, the continuous hot water supply to the hot water supply pipe 24 detected as the maximum continuous use amount by the control device 36 continues the hot water supply continuing with an interruption of a short time compared to the reference time. Hot water supply to the tube 24 may be included. The reference time may be, for example, 5 seconds, 10 seconds, or 30 seconds. When the hot water supply to the hot water supply pipe 24 continues intermittently with an interruption within the reference time, the control device 36 regards it as continuous hot water supply to the hot water supply pipe 24 and detects the maximum continuous usage amount. May be By the above, the following effects can be obtained. Even when the user switches, for example, from shower to currant and uses hot water continuously, the maximum continuous usage can be detected with high accuracy.

  FIG. 4 is a diagram showing an example of a hardware configuration of the control device 36 provided in the hot water storage type hot water supply system 35 of the first embodiment. Each function of control device 36 is realized by a processing circuit. In the example shown in FIG. 4, the processing circuitry of controller 36 comprises at least one processor 361 and at least one memory 362. When the processing circuit includes at least one processor 361 and at least one memory 362, each function of the controller 36 is realized by software, firmware, or a combination of software and firmware. At least one of software and firmware is described as a program. At least one of software and firmware is stored in at least one memory 362. The at least one processor 361 implements each function of the control device 36 by reading and executing the program stored in the at least one memory 362. The at least one processor 361 is also referred to as a central processing unit (CPU), a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, or a digital signal processor (DSP). For example, at least one memory 362 is non-volatile such as random access memory (RAM), read only memory (ROM), flash memory, erasable programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), etc. Or volatile semiconductor memory, magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disc), or the like.

  FIG. 5 is a diagram showing another example of the hardware configuration of the control device 36 provided in the hot water storage type hot water supply system 35 of the first embodiment. In the example shown in FIG. 5, the processing circuit of the controller 36 comprises at least one dedicated hardware 363. When the processing circuit comprises at least one dedicated hardware 363, the processing circuit may be, for example, a single circuit, a complex circuit, a programmed processor, a parallel programmed processor, an application specific integrated circuit (ASIC), an FPGA (field) Programmable Gate Array) or a combination thereof. The functions of the respective units of the control device 36 may be realized by processing circuits. Also, the functions of the respective units of the control device 36 may be realized collectively by a processing circuit.

  In addition, for each function of the control device 36, a part may be realized by dedicated hardware 363, and another part may be realized by software or firmware. The processing circuit may implement each function of the control device 36 by hardware 363, software, firmware, or a combination thereof.

  Further, the configuration is not limited to a configuration in which the operation of the hot water storage type hot water supply system 35 is controlled by a single control device, and the operation of the hot water storage type hot water supply system 35 is controlled by cooperation of a plurality of control devices. Also good.

Reference Signs List 1 compressor, 2 unit case, 3 water refrigerant heat exchanger, 4 pressure reducing device, 5 refrigerant pipe, 6 air heat exchanger, 7 heat pump unit, 8 hot water storage tank, 8a water inlet, 8b water outlet, 8c hot water introduction Mouth, 8d hot water inlet / outlet, 9a first water supply pipe, 9b second water supply pipe, 9c third water supply pipe, 10 water outlet pipe, 11 three-way valve, 12 water pump, 13 first water supply pipe, 14 heat pump forward pipe , 15 heat pump return pipe, 16 first bypass pipe, 17 second bypass pipe, 18 four-way valve, 20 bath heat exchanger, 20a hot water inlet pipe, 20b hot water outlet pipe, 21 second hot water pipe, 22 hot water mixing Valve, mixing valve for 23 bath, 24 hot water supply pipe, 25 hot water pipe, solenoid valve for 26 bath, 27 flowing pipe, 28 return pipe, 29 bath circulation pump, 30 bath tub, 31 pressure reducing valve, 32 unit case, 33 tank unit, 34 hot water supply tap, 35 water storage type hot water supply system, 36 control unit, 37 fluttering temperature sensor, 38 bath return temperature sensor, 39 inlet temperature sensor , 40 outlet temperature sensor, 41 outside air temperature sensor, 42, 43 hot water storage temperature sensor, 44 remote control device, 44a operation unit, 44b bather switch, 44c display unit, 44d speaker, 44e speaker switch, 44f switch, 45 Flow sensor for bath, 46 flow sensor for hot water supply, 47 hot water temperature sensor, 48 temperature sensor, 361 processor, 362 memory, 363 hardware

Claims (7)

With a hot water storage tank,
A means capable of generating hot water supplied to a bath using the hot water of the hot water storage tank;
A means capable of generating hot water supplied to a hot water supply pipe using the hot water of the hot water storage tank;
The amount of hot water supplied to the bath from the beginning of the day to the present or the total heat quantity of the hot water, and the amount of hot water supplied to the hot water supply pipe from the start of the day to the present until now Means for detecting the total usage including the total, or the maximum amount of hot water continuously supplied to the hot water supply pipe from the beginning of the day to the present, or the maximum continuous usage as the heat quantity of the hot water;
Control means for controlling a bath function for supplying hot water to the bathtub or repelling the bathtub;
An input unit through which a user can input an execution request for the bath function;
Notification means for notifying a user when the total usage or the maximum continuous usage exceeds a saving standard;
Equipped with
The hot water storage type hot water supply system, wherein the control means suspends execution of the bath function when the total usage amount or the maximum continuous usage amount exceeds the saving criterion and the execution request is input to the input means. .   The hot water storage type hot water supply system according to claim 1, wherein the notification means notifies the user that the hot water is to be saved when execution of the bath function is suspended by the control means.   The hot water storage type hot water supply system according to claim 1 or 2, wherein the control means executes the bath function when the execution request is input to the input means again after holding the execution of the bath function. system.   The setting means capable of setting in advance that execution of the bath function is not suspended even if the total usage or the maximum continuous usage exceeds the saving criterion The hot water storage type hot water supply system according to any one of the above.   The hot water storage type hot water supply system according to any one of claims 1 to 4, wherein the value of the saving standard can be changed.   The continuous hot water supply to the hot water supply pipe detected as the maximum continuous use amount includes the hot water supply to the hot water supply pipe which continues with an interruption of a short time compared to a reference time. The hot water storage type hot water supply system according to any one of the items.   The hot water storage system according to any one of claims 1 to 6, wherein the hot water of the hot water supply pipe can be used even in a state where the control means suspends the execution of the bath function.

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