JP2012112594A - Hot water supply system - Google Patents

Hot water supply system Download PDF

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JP2012112594A
JP2012112594A JP2010262838A JP2010262838A JP2012112594A JP 2012112594 A JP2012112594 A JP 2012112594A JP 2010262838 A JP2010262838 A JP 2010262838A JP 2010262838 A JP2010262838 A JP 2010262838A JP 2012112594 A JP2012112594 A JP 2012112594A
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hot water
temperature
time
water supply
boiling
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JP2010262838A
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JP5468527B2 (en
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Shinji Kuroda
紳司 黒田
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Rinnai Corp
リンナイ株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide a hot water supply system which can reduce energy consumption by suppressing wasteful heat accumulation of hot water in a hot water storage tank while considering the use of a large amount of hot water to fill a bathtub.SOLUTION: The hot water supply system includes a hot water storage tank 4 which reserves the hot water heated by a tank heating means 20, and a combustion water heater 3 which heats the hot water introduced from the hot water storage tank 4 by combustion at a burner 31. A boiling temperature setting means is provided which sets a boiling set temperature for filling on the basis of a temperature set by a filling temperature setting means when a current time is within a time zone set by a filling preparation time zone setting means, but sets a boiling set temperature for supplying hot water on the basis of a temperature set by a hot water supply temperature setting means if the current time is within a time zone set by a hot water supply operation time zone setting means, excluding a time zone set by the filling preparation time zone setting means.

Description

The present invention relates to a hot water supply system in which an instantaneous heating type combustion water heater is connected to a downstream side of a hot water storage tank for storing heated hot water.
About.

  Conventionally, a hot water storage tank that stores hot water inside, a water supply pipe that supplies water into the hot water storage tank, a hot water discharge pipe that leads out hot water stored in the hot water storage tank, and hot water that is drawn from the hot water storage tank and heated to boil There is known a hot water supply system comprising a heat pump that returns hot water into a hot water storage tank, and an instantaneous combustion hot water heater that is connected in series downstream of the hot water storage tank and heats hot water flowing through the hot water discharge pipe by combustion of a burner. (See Patent Document 1).

  The heat pump is very high in energy efficiency, but has a low heating capacity per unit time, so that it takes a relatively long time to boil a large amount of hot water. Therefore, by providing a combustion water heater that operates when the hot water tank runs out as an auxiliary heat source, a relatively large amount of hot water can be used for filling the bathtub without being aware of hot water in the hot water tank, It is also possible to shorten the boiling time by reducing the size of the hot water storage tank.

  By the way, in this type of hot water supply system, it is preferable to use hot water in the hot water storage tank as much as possible to reduce the number of operations of the combustion water heater. Therefore, when filling a bathtub with a relatively large amount of hot water, it is necessary to complete boiling of the hot water in the hot water storage tank before the hot water filling. Thus, a hot water supply system is known that accumulates the time when hot water filling is performed and completes boiling of hot water in the hot water storage tank before the hot water filling time based on the accumulated data (see Patent Document 2).

JP 2001-41570 A JP 2005-172325 A

  However, even when the boiling of the hot water in the hot water storage tank is completed prior to the hot water filling of the bathtub, for example, the hot water storage temperature of the hot water storage tank is extremely high with respect to the hot water filling temperature set as desired by the user. In this case, since the heat storage in the hot water storage tank is wasted, the energy used when boiling the hot water storage tank is wasted. Therefore, there is an inconvenience that energy consumption increases as a whole.

  In view of the above points, the present invention provides a hot water supply system capable of reducing energy consumption by suppressing wasteful heat storage of hot water in a hot water storage tank while considering the use of a large amount of hot water by filling a bathtub. For the purpose.

  The present invention provides a hot water storage tank, tank heating means for heating and boiling the hot water in the hot water storage tank, a hot water discharge pipe for deriving hot water in the hot water storage tank, and water in each of the hot water storage tank and the hot water discharge pipe. A hot water supply pipe for supplying the hot water in the hot water storage tank; a hot water temperature detecting means for detecting the temperature of the hot water in the hot water storage tank; A hot-water pipe that connects a pipe and a bathtub and supplies hot water to the bathtub, hot-water supply temperature setting means for setting a desired hot-water supply temperature by an input operation, and a hot-water filling that sets a desired bath hot-water temperature by an input operation A temperature setting means, a boiling temperature setting means for setting a boiling temperature as a target temperature when the tank heating means boils the hot water in the hot water storage tank, and a detection temperature of the hot water storage temperature detection means are preset. Tank boiling control means for performing boiling of hot water in the hot water storage tank by the tank heating means, with the boiling temperature set by the boiling temperature setting means as a target temperature when the temperature becomes lower than the boiling start temperature; Clock means for indicating the current date and time, hot water supply operation time zone setting means for setting a hot water supply operation time zone based on a scheduled time for hot water supply operation during the day, and hot water filling in the bathtub during the day Hot water filling preparation that sets a time range between the reference time and a time that goes back a predetermined time including the time to complete boiling of hot water in the hot water storage tank as a hot water preparation time zone, with a scheduled start time as a reference time A time zone setting means, wherein the boiling temperature setting means has a current time indicated by the clock means when the current time is within the time zone set by the hot water preparation time zone setting means. Based on the set temperature by the hot water temperature setting means, set the boiling set temperature for hot water filling, the current time indicated by the clock means other than the time zone set by the hot water preparation time zone setting means, When it is within the time zone set by the hot water supply operation time zone setting means, the boiling hot water set temperature is set based on the temperature set by the hot water supply temperature setting means.

  According to the present invention, in the hot water supply operation time zone set by the hot water supply operation time zone setting means, the hot water storage tank using the boiling set temperature for hot water supply based on the temperature set by the hot water supply temperature setting means is used. In the hot water preparation time zone set by the hot water preparation time zone setting means, the boiling temperature setting for hot water filling is set based on the temperature set by the hot water temperature setting means. Boiling of the hot water storage tank used is performed.

  Accordingly, in the time zone in which hot water is supplied, the hot water in the hot water storage tank is boiled up according to the temperature desired by the user set by the hot water supply temperature setting means, and the hot water is filled prior to the time when the hot water is filled. Since the hot water in the hot water storage tank is boiled according to the temperature desired by the user set by the tension temperature setting means, useless heat storage in the hot water storage tank can be suppressed, and unnecessary energy consumption can be suppressed. it can.

  Further, in the present invention, the hot water preparation time zone setting means collects the hot water start time every day for a predetermined number of days in the past including the day, and is the earliest among the hot water start times up to the previous day of collection. The hot water filling start time is set as the reference time of the day.

  Thus, the hot water start time accurately corresponding to the user's life pattern can be used as the reference time, so that the hot water in the hot water storage tank can be surely boiled prior to the hot water operation. The hot water in the hot water storage tank can be used effectively when tensioning.

  Further, in the present invention, the hot water supply operation time zone setting means collects the first hot water supply operation start time and the last hot water supply operation end time of the day for each day for a predetermined number of days in the past including the day. The hot water supply start time and the latest hot water supply start time to the latest hot water supply operation end time among the hot water supply start time and the hot water supply end time up to the previous day are set as the scheduled hot water supply time. It is characterized by setting.

  As a result, it is possible to set a hot water supply operation time zone that accurately corresponds to the user's life pattern, so that during the hot water supply operation time, not only can the hot water tank be heated efficiently. When the hot water supply operation is not performed, useless boiling operation can be prevented and energy consumption can be surely reduced.

The block diagram of the hot-water supply system in embodiment of this invention. The flowchart which shows the setting operation | movement of the boiling temperature in the hot-water supply system of this embodiment. The flowchart which shows the setting operation | movement of the time slot | zone for boiling operation in the hot water supply system of this embodiment. The figure which shows an example of the recording form of the extract | collected time data.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the hot water supply system of the present embodiment includes a tank unit 1, a heat pump unit 2, and an instantaneous heating type combustion water heater 3.

  The tank unit 1 includes a hot water storage tank 4 and a tank controller 5. A hot water storage thermistor 6 (hot water storage temperature detecting means) for detecting the temperature of hot water in the upper layer of the hot water storage tank 4 is attached to the outer wall surface of the hot water storage tank 4. A terminal end of a water supply pipe 7 for supplying water to the hot water storage tank 4 is connected to the lower part of the hot water storage tank 4. The water supply pipe 7 extends to the outside of the tank unit 1, and a water supply pipe (not shown) is connected to the start end of the water supply pipe as a water supply source. Connected to the upper part of the hot water storage tank 4 is a start end of a hot water discharge pipe 8 for extracting hot water from the hot water storage tank 4. The hot water discharge pipe 8 extends to the outside of the tank unit 1 and is connected to a hot water tap (not shown) such as a currant or a shower at its end.

  The hot water discharge pipe 8 has a hot water variable valve 9 for changing the amount of hot water discharged from the hot water storage tank 4, a tank hot water flow sensor 10 for detecting the hot water amount passing through the hot water variable valve 9, and the temperature of the hot water passed through the tank hot water flow sensor 10. A hot water side thermistor 11 for detection is provided.

  The water supply pipe 7 includes a branch water supply path 7 a that branches from the upstream side of the connection end to the hot water storage tank 4 and is connected to the downstream side of the hot water side thermistor 11 of the hot water discharge pipe 8. In the branch water supply path 7 a, the water flow rate variable valve 12 that changes the flow rate of water toward the tap water pipe 8, the water flow rate sensor 13 that detects the amount of water that has passed through the water flow rate variable valve 12, and the temperature of the water that has passed through the water flow rate sensor 13. An incoming water thermistor 14 for detection is provided. A mixing thermistor 15 is provided downstream of the junction of hot water and water to which the branch water supply channel 7 a is connected in the hot water discharge pipe 8.

  Further, downstream of the mixing thermistor 15, there are provided an outward pipe 8 a for sending hot water from the hot water outlet pipe 8 to the combustion hot water heater 3, and a return pipe 8 b for taking hot water passing through the combustion hot water heater 3. A hot water bypass pipe 16 is provided between the pipe 8b. The hot water bypass pipe 16 is provided with a bypass valve 17 for opening and closing the hot water bypass pipe 16, and a hot water supply outlet thermistor is provided at the end side of the hot water pipe 8 extending downstream of the connection point between the hot water bypass pipe 16 and the return pipe 8 b. 18 is provided.

  The tank controller 5 includes a hot water storage thermistor 6, a hot water side thermistor 11, an incoming water thermistor 14, a mixing thermistor 15, a hot water supply outlet thermistor 18, and a circulating upstream thermistor 29, which will be described later, and a hot water flow sensor 10 and a water flow sensor. The detection signal of the water flow rate by 13 is input. The operations of the hot water variable valve 9, the water variable valve 12, and the bypass valve 17 are controlled by a control signal output from the tank controller 5.

  The tank controller 5 is connected to a remote controller 19 installed indoors. Although not shown, the remote controller 19 has a desired hot water supply temperature (temperature of hot water supplied from the outlet of the hot water discharge pipe 8) and a desired hot water filling temperature (a hot water filling pipe 35 to be described later) in accordance with a user operation. A temperature switch (corresponding to the hot water supply temperature setting means and the hot water temperature setting means in the present invention) for setting the temperature of hot water supplied to the bathtub via, and a general hot water supply mode (a hot water valve 40 described later). A mode for switching between a mode in which hot water is supplied from the outlet of the hot water discharge pipe 8 and a hot water filling mode (mode in which the hot water filling valve 40 is opened and hot water is supplied from the hot water filling pipe 35). A changeover switch (not shown) and the like are provided.

  The heat pump unit 2 includes a heat pump 20 (tank heating means) and a heat pump controller 21. The heat pump 20 is configured by connecting a compressor 22, a condenser 23, a decompressor 24, and an evaporator 25 through a refrigerant circulation path 26.

  The condenser 23 is connected to a tank circulation path 27 connected to the upper and lower parts of the hot water storage tank 4. A part of the tank circulation path 27 is disposed on the tank unit 1 side, the other part is disposed on the heat pump unit 2 side, and the tank unit 1 and the heat pump unit 2 are connected to each other. Hot water in the tank circulation path 27 that is connected to the hot water storage tank 4 is heated by heat exchange with the refrigerant in the refrigerant circulation path 26 via the condenser 23 of the heat pump 20.

  The tank circulation path 27 on the heat pump unit 2 side is provided with a circulation pump 28 for circulating hot water stored in the hot water storage tank 4 into the tank circulation path 27, and the tank circulation path 27 on the tank unit 1 side includes A circulating upstream thermistor 29 that detects the temperature of hot water supplied from the hot water storage tank 4 to the condenser 23 is provided.

  The heat pump controller 21 is communicably connected to the tank controller 5 and is in a state where the boiling operation can be performed when a signal instructing permission of the boiling operation is received from the tank controller 5. Further, when a signal instructing prohibition of the boiling operation is received from the tank controller 5, the boiling is not executed.

  In addition, the heat pump controller 21 functionally includes tank boiling control means for controlling the heat pump 20 when boiling hot water in the hot water storage tank 4 is heated.

  The tank controller 5 functionally has a boiling temperature setting means for setting a boiling preset temperature as a boiling target temperature when the tank boiling control means uses the heat pump 20 to boil hot water in the hot water storage tank 4. I have. Furthermore, although not shown, the tank controller 5 sets a time zone (clock means) for outputting the current time and a hot water supply operation time zone for setting a scheduled time range in which the hot water supply operation is performed in one day as a hot water supply operation time zone. Means between a reference time and a time that goes back a predetermined time including a time when boiling of the hot water in the hot water tank is completed, with a scheduled time at which hot water filling to the bathtub is started in a day as a reference time A hot water preparation time zone setting means for setting the time range as the hot water preparation time zone is functionally provided.

  And the tank controller 5 sets the boiling setting temperature according to the hot water supply setting temperature by the remote controller 19 by the boiling temperature setting means for each time zone described above, or the boiling setting according to the hot water filling setting temperature. The temperature is set by the boiling temperature setting means, and a boiling permission signal including the boiling setting temperature information is transmitted to the heat pump controller 21.

  When the heat pump controller 21 receives the boiling permission signal including the boiling set temperature information from the tank controller 5, the heat pump controller 21 operates the heat pump 20 so that the detected temperature of the circulating upstream thermistor 29 becomes the boiling set temperature. 4. Boiling operation of hot water is performed. The boiling operation according to this embodiment will be described in detail later.

  Here, the hot water storage state in the hot water storage tank 4 will be described. The hot water discharge pipe 8 is connected to the upper part of the hot water storage tank 4, and the water supply pipe 7 is connected to the lower part of the hot water storage tank 4. Therefore, when hot water is supplied from the hot water storage tank 4 to the hot water discharge pipe 8, water is supplied from the water supply pipe 7 to the lower part of the hot water storage tank 4 accordingly. In the hot water storage tank 4, a hot water layer is formed at the top and a water layer is formed at the bottom. As hot water is supplied from the hot water storage tank 4, the upper hot water layer decreases, and when the upper layer portion of the hot water storage tank 4 becomes a water layer, the hot water runs out.

  The tank controller 5 determines that the hot water storage tank 4 is out of hot water when the detected temperature of the hot water storage thermistor 6 is lower than a preset boiling start temperature.

  Further, the tank controller 5 is configured so that the hot water supply variable valve 9 and the water supply variable valve 12 are set so that the detected temperature of the mixing thermistor 15 or the hot water supply outlet thermistor 18 becomes the target temperature when hot water supply is started in a state where no hot water has run out. Mixing temperature control is performed to control the degree of opening. At this time, the tank controller 5 opens the bypass valve 17 in the general hot water supply mode, and closes the bypass valve 17 in the hot water filling mode.

  On the other hand, when hot water supply is started in a state where hot water has run out, the tank controller 5 closes the hot water variable valve 9 and the bypass valve 17 and supplies all the water from the water supply pipe 7 to the combustion water heater 3. To do. In this case, in the combustion water heater 3, heating temperature adjustment control is performed by a water heater controller 32 described later.

  The combustion water heater 3 includes a water heater circuit 30, a gas burner 31, and a water heater controller 32 that are connected to an outgoing pipe 8 a and a return pipe 8 b that extend from the outlet pipe 8 of the tank unit 1.

  The water heater circuit 30 is branched from the water heater circuit 30, the heat exchanger 33 heated by the gas burner 31, the hot water supply bypass pipe 34 communicating with the upstream side and the downstream side of the heat exchanger 33 in the water heater circuit 30, and the water heater circuit 30. And a hot water pipe 35 connected to a bathtub (not shown).

  On the upstream side of the heat exchanger 33 in the water heater circuit 30, a water amount servo 36 that adjusts the flow rate of hot water supplied from the forward pipe 8 a, and a water heater flow sensor 37 that detects the flow rate of hot water passing through the water amount servo 36, A bypass servo 38 is provided for changing the distribution ratio between the flow rate of hot water supplied to the heat exchanger 33 side and the flow rate of hot water supplied to the hot water supply bypass pipe 34 side.

  On the downstream side of the hot water supply bypass pipe 34, a hot water heater thermistor 39 for detecting the temperature of the hot water toward the return pipe 8b or the hot water filling pipe 35 is provided. The hot water filling pipe 35 is provided with a hot water filling valve 40 for opening and closing the hot water filling pipe 35 and a hot water filling flow rate sensor 41 for detecting the flow rate of water flowing through the hot water filling pipe 35.

  A temperature detection signal from the water heater thermistor 39, a water flow rate detection signal from the water heater flow sensor 37, and a water flow rate detection signal from the hot water flow rate sensor 41 are input to the water heater controller 32. Further, the operation of the bypass servo 38, the water amount servo 36, the gas burner 31, and the hot water filling valve 40 is controlled by the control signal output from the water heater controller 32.

  The water heater controller 32 is connected so as to be communicable with the tank controller 5, and enters a heating permission state when a signal instructing heating permission is received from the tank controller 5. The heating temperature for controlling the combustion amount of the gas burner 31 so that the detected temperature of the hot water heater thermistor 39 becomes the target hot water temperature when water flow of a predetermined lower limit flow rate is detected by the hot water heater flow sensor 37. Execute adjustment control. Further, when a signal for instructing heating prohibition is received from the tank controller 5, the heating prohibiting state is entered, and execution of the heating temperature control is prohibited.

  In addition, the hot water supply controller 32 opens the hot water filling valve 40 and performs the hot water filling flow rate sensor 41 when performing the hot water filling operation for supplying a predetermined amount of hot water to a bathtub (not shown) (hot water filling mode). The amount of hot water supplied to the bathtub detected by is accumulated. When the cumulative amount of hot water supplied to the bathtub reaches the predetermined amount, the hot water filling valve 40 is closed and the hot water filling operation is terminated. Then, the water heater controller 32 transmits a hot water operation signal indicating the start and end of the hot water filling operation to the tank controller 5, and the tank controller 5 responds to the hot water filling operation signal to the heat pump controller 21. And send the boiling instructions.

  The operation of the tank controller 5 which is the gist of the present invention in the hot water supply system configured as described above will be described.

  The tank controller 5 sets the boiling temperature by the procedure shown in FIG. 2 by the boiling temperature setting means. That is, in STEP 1, the boiling temperature setting means determines whether or not the current time indicated by the clock means is a hot water preparation time zone. The hot water preparation time zone is a time zone set by the hot water preparation time zone setting means provided as a function of the tank controller 5. The boiling temperature setting means proceeds to STEP 2 when the current time is the hot water preparation time zone.

  When proceeding to STEP2, the boiling temperature setting means refers to the hot water filling set temperature set by the remote controller 19, and when the hot water filling set temperature is lower than 44 ° C., the process proceeds to STEP3.

  When proceeding to STEP 3, the boiling temperature setting means sets the boiling setting temperature to 45 ° C., and the tank controller 5 transmits a boiling permission signal together with the boiling setting temperature information to the heat pump controller 21 and returns to STEP 1.

  The heat pump controller 21 that has received the boiling permission signal refers to the temperature information of the hot water in the hot water storage tank 4 from the tank controller 5 and activates the circulation pump 28 when the hot water storage tank 4 has run out. The heat pump 20 is operated so that the hot water of the hot water storage tank 4 is heated so that the detected temperature of the circulating upstream thermistor 29 is 45 ° C., which is the set temperature for boiling.

  If the hot water filling set temperature is 44 ° C. or higher in STEP 2, proceed to STEP 4. When proceeding to STEP 4, the boiling temperature setting means sets the boiling setting temperature to 60 ° C., and the tank controller 5 transmits a boiling permission signal together with the boiling setting temperature information to the heat pump controller 21 and returns to STEP 1. And the heat pump controller 21 which received the boiling permission signal performs the boiling operation of the hot water of the hot water storage tank 4 by making 60 degreeC into a boiling preset temperature.

  As described above, when the current time is the hot water preparation time zone, the tank controller 5 sets the boiling temperature according to the hot water set temperature set by the user. As will be described in detail later, the hot water filling preparation time zone corresponds to the hot water filling scheduled time obtained by learning the user's life pattern, and the boiling of the hot water storage tank 4 is performed prior to the hot water filling scheduled time. In addition to completing the raising, the temperature of the hot water in the hot water storage tank 4 can be set to a temperature corresponding to the hot water setting temperature. Therefore, useless heat storage in the hot water storage tank 4 can be suppressed, and hot water in the hot water storage tank 4 can be used effectively in a hot water filling operation using a relatively large amount of hot water.

  If the current time is not in the hot water preparation time zone in STEP 1, the process proceeds to STEP 5. When proceeding to STEP 5, the boiling temperature setting means determines whether or not the current time indicated by the clock means is in the hot water supply operation time zone. The hot water supply operation time zone is a time zone set by the hot water supply operation time zone setting means provided as a function of the tank controller 5. The boiling temperature setting means proceeds to STEP 6 when the current time is the hot water supply operation time zone.

  When proceeding to STEP 6, the boiling temperature setting means refers to the hot water set temperature set by the remote controller 19, and proceeds to STEP 7 when the hot water set temperature is lower than 44 ° C.

  When proceeding to STEP 7, the boiling temperature setting means sets the boiling setting temperature to 45 ° C., and the tank controller 5 transmits a boiling permission signal together with the boiling setting temperature information to the heat pump controller 21 and returns to STEP 1.

  Also in this case, the heat pump controller 21 that has received the boiling permission signal refers to the temperature information of the hot water in the hot water storage tank 4 from the tank controller 5, and if the hot water storage tank 4 has run out, the circulation pump 28 is operated, and the heat pump 20 is operated so that the temperature detected by the circulating upstream thermistor 29 is 45 ° C., which is the preset heating temperature, and the hot water in the hot water storage tank 4 is heated.

  On the other hand, when the hot water supply set temperature is 44 ° C. or higher in STEP 6, the process proceeds to STEP 8. When proceeding to STEP 8, the boiling temperature setting means sets the boiling setting temperature to 60 ° C., and the tank controller 5 transmits a boiling permission signal together with the boiling setting temperature information to the heat pump controller 21 and returns to STEP 1. And the heat pump controller 21 which received the boiling permission signal performs the boiling operation of the hot water of the hot water storage tank 4 by making 60 degreeC into a boiling preset temperature.

  In STEP 5, when the current time is not the hot water supply operation time zone, that is, when the current time is neither the hot water preparation time zone nor the hot water supply operation time zone, it can be determined that the hot water supply or hot water supply operation is not performed. Therefore, the tank controller 5 proceeds to STEP 9 and transmits a signal prohibiting boiling to the heat pump controller 21 and returns to STEP 1. This eliminates unnecessary boiling operation in a time zone when neither hot water filling nor hot water supply operation is performed, and wasteful energy consumption can be saved.

  Note that the temperature values used in STEPs 2 to 4 and STEPs 6 to 8 in FIG. 2 are not limited to this, and it goes without saying that optimum temperature values are selected.

  Next, the setting of the time zone for the boiling operation in the tank controller 5 will be described. Referring to FIG. 3, tank controller 5 proceeds to STEP 11 when the current time indicated by the clock means in STEP 10 becomes 02:00.

  In the present embodiment, 02:00 to 01:59 is defined as one day, and the magnitude relationship of time is set to 02:00 <12:00 <0:00 <01:59 accordingly.

  Although not shown, the tank controller 5 includes storage means such as an EEPROM, and as shown in FIG. 4, time data for the past seven days including the current day (first hot water supply start time, hot water start time, last day of the day) The hot water supply operation end time) is stored in the storage means in a state of being stored in the date and time records for each day (record 0 to record 7 in FIG. 4). Note that the value of the time data in FIG. 4 shows an example.

  The hot water supply operation time zone setting means of the tank controller 5 collects the first hot water operation start time of the day and the last hot water operation end time of the day, stores them in the date / time record of the day, and sets the hot water preparation time zone of the tank controller 5 The means collects the hot water start time of the day and stores it in the date / time record of the day. Thus, the past 7 days and each time data of the day are stored in the storage means.

  Referring to FIG. 3, when proceeding from STEP 10 to STEP 11, the tank controller 5 updates the date / time record stored in the storage means. That is, as shown in FIG. 4, at time 01:59 on the previous day, each time data of record 0 collected on that day is updated as time data of record 1 when the current time becomes 02:00. Similarly, the time data of each record is updated by shifting one day for each record, and the time data stored in the record 7 seven days ago is deleted on the previous day. By performing this update, new data is always stored, and changes in the user's life pattern can be reflected.

  Note that the record 0 of the current day becomes unrecorded by updating the date / time record in STEP 11. In this record 0, the hot water supply operation start time of the day, the hot water start time of the day, and the last hot water supply of the day collected by the hot water supply operation time zone setting means and the hot water preparation time zone setting means of the tank controller 5 are recorded. The operation end time is stored.

  When the update of the date / time record in STEP 11 is completed, the hot water supply operation time zone setting means and the hot water preparation time zone setting means of the tank controller 5 are changed from the date / time record in STEP 12-1, STEP 12-2, and STEP 12-3, respectively. Each time data is extracted.

  In STEP12-1, the hot water supply operation time zone setting means of the tank controller 5 extracts the earliest hot water supply start time from the records 1 to 7 for the past seven days, and sets this as the scheduled hot water supply start time. Referring to FIG. 4, since the hot water supply start time one day before is the earliest in the updated record, this time 07:00 is set as the scheduled hot water supply start time. This scheduled hot water supply start time is the time when the user plans to start hot water supply. For this reason, it is necessary to complete the boiling operation of the hot water storage tank 4 before the user starts hot water supply.

  Therefore, in STEP 13-1, a desired time can be set from a time extracted in STEP 12-1 to a predetermined time (between 0 minutes and 120 minutes) in consideration of the time required for boiling the hot water storage tank 4 by the heat pump unit 2. This time is calculated as 30 minutes), and this time is preceded by the scheduled hot water supply start time, and the heat pump unit 2 is allowed to start the boiling operation for hot water supply. To do. Specifically, for example, 06:30, which is 30 minutes after time 07:00, is set as the boiling operation start permission time.

  On the other hand, in STEP 12-2, the hot water supply operation time zone setting means of the tank controller 5 extracts the latest hot water supply end time from records 1 to 7 in the past seven days, and sets this as the scheduled hot water supply end time. If FIG. 4 is referred, since the hot water supply end time five days ago is the latest in the record after the update, this time 22:45 is set as the scheduled hot water supply end time. This scheduled hot water supply end time is the time at which the user plans to end hot water supply. After the user finishes hot water supply, it is not necessary to supply hot water from the hot water storage tank 4. Therefore, if the hot water is stored in the hot water storage tank 4 after the user finishes the hot water supply, the heat is wasted.

  Therefore, in STEP 13-2, it is possible to set a desired time (between 0 minutes and 120 minutes) from the time extracted in STEP 12-2 in consideration of the time required for boiling the hot water storage tank 4 by the heat pump unit 2. In this embodiment, it is calculated as 60 minutes), and this time is set as a time at which the heating operation for hot water supply is prohibited with respect to the heat pump unit 2 prior to the scheduled hot water supply end time. . Specifically, for example, 21:45, which is 60 minutes after time 22:45, is set as the boiling operation prohibition time.

  The hot water supply operation time zone setting means of the tank controller 5 sets the hot water supply operation time zone in STEP 14-1 using the boiling operation start permission time and the boiling operation prohibition time obtained in this way. That is, the hot water supply operation time zone setting means of the tank controller 5 sets the hot water supply operation time zone from the time when the hot water heating operation is permitted to the time when the hot water heating operation is prohibited. In this embodiment, specifically, the time zone of 06:30 to 21:45 is set as the hot water supply operation time zone of the day.

  Further, in STEP 12-3, the hot water preparation time zone setting means of the tank controller 5 extracts the earliest hot water start time from the records 1 to 7 for the past seven days, and this is set as the hot water start scheduled time. To do. Referring to FIG. 4, since the hot water filling start time three days ago is the earliest in the updated record, this time 19:00 is set as the hot water filling start scheduled time (reference time in the present invention). This scheduled hot water start time is the time when the user plans to start hot water filling. Since a relatively large amount of hot water is used during hot water filling, it is necessary to complete the boiling operation of the hot water storage tank 4 before the user starts hot water filling.

  Therefore, in STEP13-3, a predetermined time (between 0 minutes and 120 minutes) from the time extracted in STEP12-3 (the reference time) to a time required for boiling the hot water storage tank 4 by the heat pump unit 2 is set. (In this embodiment, it is set to 60 minutes), and a time that is traced back is calculated, and this time is heated to the heat pump unit 2 prior to the hot water filling start time. The time when the operation start is permitted. Specifically, for example, 18:00 that goes back 60 minutes from time 19:00 is set as the boiling operation start permission time.

  The hot water preparation time zone setting means of the tank controller 5 sets the hot water preparation time zone in STEP 14-2. That is, the hot water filling preparation time zone setting means of the tank controller 5 sets the hot water filling preparation time zone from the time when the hot water boiling operation start permission time to the time when the hot water filling start is scheduled. In the present embodiment, specifically, the time zone from 18:00 to 19:00 is set as the hot water preparation time zone of the day.

  When the hot water preparation time zone set by the hot water preparation time zone setting means overlaps with any time of the hot water supply operation time zone set by the hot water supply operation time zone setting means, the tank controller 5 Priority is given to control in the preparation time zone.

  In this way, the tank controller 5 uses the latest time data extracted from the user's life pattern, and in the time zone in which the hot water supply operation is performed, raises the hot water supply according to the hot water set temperature set by the user. When the hot water storage tank 4 is heated by the heat pump unit 2 at the set temperature and it is necessary to prepare the hot water filling, the hot water filling temperature corresponding to the hot water filling temperature set by the user is set. Since the boiling operation of the hot water storage tank 4 by the heat pump unit 2 is performed, it is possible to perform hot water supply and hot water filling that prevent unnecessary energy consumption in accordance with the life pattern of the user.

  DESCRIPTION OF SYMBOLS 3 ... Combustion water heater, 4 ... Hot water storage tank, 5 ... Tank controller (boiling temperature setting means, hot water supply operation time zone setting means, hot water preparation time zone setting means, clock means), 6 ... Hot water storage thermistor (hot water temperature detection means) ), 7 ... Water supply pipe, 8 ... Hot water discharge pipe, 19 ... Remote controller (hot water supply temperature setting means, hot water filling temperature setting means), 20 ... Heat pump (tank heating means), 32 ... Heat pump controller (tank boiling control means) , 35 ... Hot water filled tube.

Claims (3)

  1. A hot water storage tank,
    Tank heating means for heating and boiling the hot water in the hot water storage tank;
    A tapping pipe for deriving hot water from the hot water storage tank;
    A water supply pipe for supplying water to each of the hot water storage tank and the hot water discharge pipe;
    Hot water storage temperature detecting means for detecting the temperature of hot water in the hot water storage tank;
    A combustion water heater that is interposed in the tapping pipe and heats hot water flowing through the tapping pipe by combustion of a burner;
    A hot water pipe connecting the outlet pipe and the bathtub and supplying hot water to the bathtub;
    Hot water temperature setting means for setting a desired hot water temperature by an input operation;
    A hot water temperature setting means for setting a desired hot water temperature by an input operation;
    A boiling temperature setting means for setting a boiling temperature as a target temperature when the tank heating means boils hot water in the hot water storage tank;
    When the detected temperature of the hot water storage temperature detection means is lower than a preset boiling start temperature, the heating temperature for the hot water storage tank is heated by the tank heating means with the boiling temperature set by the boiling temperature setting means as a target temperature. Tank boiling control means for performing boiling of the tank,
    A clock means indicating the current date and time;
    A hot water supply operation time zone setting means for setting a hot water supply operation time zone based on a scheduled time during which a hot water supply operation is performed in one day;
    A time range between a reference time and a time that goes back a predetermined time including completion of boiling of the hot water in the hot water storage tank, with a scheduled time at which hot water filling to the bathtub is started in one day as a reference time A hot water preparation time zone setting means for setting as a hot water preparation time zone,
    The boiling temperature setting means, when the current time indicated by the clock means is within the time zone set by the hot water preparation time zone setting means, based on the set temperature by the hot water temperature setting means A heating set temperature for the water is set, and the current time indicated by the clock means is within a time zone set by the hot water supply operation time zone setting means other than the time zone set by the hot water filling preparation time zone setting means. A hot water supply temperature setting for hot water supply is set based on the temperature set by the hot water supply temperature setting means.
  2.   The hot water filling preparation time zone setting means collects the hot water filling start time for each day of the past predetermined number of days including the day, and sets the earliest hot water filling start time among the hot water filling start times up to the previous day of collection, The hot water supply system according to claim 1, wherein the reference time of the day is set.
  3.   The hot water supply operation time zone setting means collects the first hot water supply operation start time and the last hot water supply operation end time of the day for each predetermined number of days in the past including the current day, and starts the hot water supply operation up to the previous day of collection. The hot water supply operation time zone is set based on the scheduled hot water supply time from the earliest hot water supply operation start time to the latest hot water supply operation end time among the time and the hot water supply operation end time. The hot water supply system according to claim 1 or 2.
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JP2013224764A (en) * 2012-04-20 2013-10-31 Rinnai Corp Heat supply device
JP2014070845A (en) * 2012-09-29 2014-04-21 Noritz Corp Heat pump type hot water supply system
JP2014134349A (en) * 2013-01-10 2014-07-24 Rinnai Corp Hot water supply system
JP2014238258A (en) * 2014-09-26 2014-12-18 リンナイ株式会社 Heat supply device
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JP2013224764A (en) * 2012-04-20 2013-10-31 Rinnai Corp Heat supply device
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