WO2021199433A1 - Hot water storage-type water heater - Google Patents

Hot water storage-type water heater Download PDF

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Publication number
WO2021199433A1
WO2021199433A1 PCT/JP2020/015345 JP2020015345W WO2021199433A1 WO 2021199433 A1 WO2021199433 A1 WO 2021199433A1 JP 2020015345 W JP2020015345 W JP 2020015345W WO 2021199433 A1 WO2021199433 A1 WO 2021199433A1
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WO
WIPO (PCT)
Prior art keywords
hot water
heating capacity
water storage
boiling
water heater
Prior art date
Application number
PCT/JP2020/015345
Other languages
French (fr)
Japanese (ja)
Inventor
直紀 柴崎
風間　史郎
利幸 佐久間
謙作 畑中
▲泰▼成 松村
雄斗 黒森
洋真 黒柳
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2022511485A priority Critical patent/JP7334850B2/en
Priority to PCT/JP2020/015345 priority patent/WO2021199433A1/en
Publication of WO2021199433A1 publication Critical patent/WO2021199433A1/en
Priority to JP2023056965A priority patent/JP2023078464A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters

Definitions

  • This disclosure relates to a hot water storage type water heater.
  • hot water storage type water heaters In hot water storage type water heaters, in order to concentrate the boiling operation during the midnight hours when electricity charges are cheap, it is common practice to boil the entire amount of hot water in the hot water storage tank to the maximum temperature that can be set during the midnight hours. ing. In a hot water storage type water heater, it is common to combine a hot water storage tank with a heating means having a heating capacity capable of completing boiling of the entire amount during the midnight hours.
  • Patent Document 1 describes a hot water storage type water heater whose heating capacity can be changed.
  • the boiling operation of the hot water storage type water heater described in Patent Document 1 in the midnight time zone the boiling operation is performed with a heating capacity capable of completing the boiling of the entire amount by the end time of the midnight time zone. If hot water is suddenly used during this boiling operation and it is determined that boiling of the required amount of hot water is not completed, the heating capacity is changed to a higher heating capacity.
  • the heating capacity of the boiling operation during the midnight hours is set to the heating capacity that can boil the entire amount of hot water in the hot water storage tank, and if it is not necessary to boil the entire amount of hot water in the hot water storage tank, On the contrary, there is a risk that energy efficiency will be low.
  • This disclosure is made to solve the above-mentioned problems, and is an improved hot water storage type water heater that can perform boiling operation with efficient heating capacity even when the total amount of boiling is not required.
  • the purpose is to provide.
  • the hot water storage type water heater has a heating means configured to change the heating capacity for heating water, a hot water storage tank capable of storing water heated by the heating means, and a heating capacity of the heating means. It is provided with a control device configured to control switching and to control a boiling operation in which water heated by a heating means is stored in a hot water storage tank.
  • the rated heating capacity of the heating means is lower than the heating capacity capable of completing the total boiling of the total amount of water in the hot water storage tank to the settable maximum hot water storage temperature during the low charge time period.
  • the boiling operation when the amount of heat that needs to be boiled is small, the boiling operation can be performed with an efficient heating capacity.
  • FIG. 1 is a diagram schematically showing an overall configuration of a hot water storage type water heater according to a first embodiment of the present disclosure.
  • the hot water storage type water heater 35 includes a tank unit 33, an HP (heat pump) unit 7, and a remote control device 44.
  • the HP unit 7 and the tank unit 33 are connected to each other via an HP going pipe 14, an HP returning pipe 15, and an electric wiring (not shown).
  • the tank unit 33 has a built-in control device 36.
  • the operation of various valves, pumps, etc. included in the tank unit 33 and the HP unit 7 is controlled by the control device 36 electrically connected to them.
  • the control device 36 and the remote control device 44 are connected by wire or wireless so that they can communicate with each other.
  • the remote control device 44 is an example of a user interface.
  • the remote controller 44 is equipped with a display unit that displays information such as the operating state of the hot water storage type water heater 35, an operation unit such as a switch operated by the user, a speaker, a microphone, and the like.
  • the operation unit receives the user's operation regarding the operation operation command of the hot water storage type water heater and the change of the set value.
  • the remote controller 44 may be installed on a wall such as a kitchen, a living room, or a bathroom.
  • a plurality of remote control devices 44 may be able to communicate with the control device 36.
  • a mobile terminal such as a smartphone may have a function as a user interface such as the remote control device 44.
  • the mobile terminal and the control device 36 may be configured to be able to communicate with each other via a network.
  • the HP unit 7 functions as a heating means for heating water.
  • the HP unit 7 constitutes a heat pump cycle by connecting the compressor 1, the water-refrigerant heat exchanger 3, the expansion valve 4, and the air heat exchanger 6 in an annular shape by the refrigerant pipe 5.
  • the water-refrigerant heat exchanger 3 is for exchanging heat between the refrigerant flowing through the refrigerant pipe 5 and the low-temperature water led from the tank unit 33.
  • the value of the heating capacity of the HP unit 7 by the refrigerant circuit can be changed.
  • the heating capacity of the HP unit 7 may be simply referred to as "heating capacity”.
  • the heating capacity corresponds to, for example, the amount of heat that the HP unit 7 gives to water per hour.
  • the unit of heating capacity is, for example, kW (kilowatt).
  • the tank unit 33 contains the following various parts and pipes.
  • the hot water storage tank 8 is for storing hot water.
  • a third water supply pipe 9c is connected to the water introduction port 8a provided at the lower part of the hot water storage tank 8.
  • the water supplied from a water source such as tap water 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.
  • the hot water supply pipe 21 for supplying the hot water stored in the hot water storage tank 8 to the outside of the hot water storage type water heater 35 and the hot water supply pipe 13 are connected to the hot water introduction outlet 8d provided in the upper part of the hot water storage tank 8. Has been done.
  • the hot water heated by the HP unit 7 flows into the hot water storage tank 8 from the hot water introduction outlet 8d.
  • the low temperature water from the third water supply pipe 9c flows into the hot water storage tank 8 from the water introduction port 8a.
  • hot water is stored in the hot water storage tank 8 so that a temperature difference occurs between the upper and lower parts.
  • a plurality of hot water storage temperature sensors 42, 43 are attached to the surface of the hot water storage tank 8 at different heights. By detecting the temperature distribution of the hot water in the hot water storage tank 8 with these hot water storage temperature sensors 42 and 43, the amount of remaining hot water in the hot water storage tank 8 is grasped, and based on this, the hot water in the hot water storage tank 8 is boiled by the HP unit 7. The start and stop of raising operation are controlled.
  • a heat source pump 12 and a bath heat exchanger 20 are built in the tank unit 33.
  • the heat source pump 12 is a pump for circulating hot water to various pipes described later in the tank unit 33, and is provided on the HP going pipe 14.
  • the bath heat exchanger 20 is a heat exchanger for heating the water to be heated (bathtub water, heating water, etc.) on the secondary side by using the high temperature hot water supplied from the hot water storage tank 8 or the HP unit 7. be.
  • a bath going pipe 27 and a bath returning pipe 28 for circulating hot water in the bathtub 30 will be illustrated and described.
  • the bath heat exchanger 20 is installed in the middle of the bath going pipe 27 and the bath returning pipe 28. Further, a bath circulation pump 29 for circulating bathtub water is installed in the middle of the bath return pipe 28.
  • the three-way valve 11 is a flow path switching means having an a port and a b port for hot water to flow in and a c port for hot water to flow out, and flows between two paths, ac and bc. You can switch routes.
  • the four-way valve 18 is a flow path switching means having b-ports and c-ports for hot water to flow in and a-ports and d-ports for hot water to flow out, and has four routes, ba, ca, b-. The flow path can be switched between d and cd.
  • the water outlet pipe 10 connects the water outlet 8b provided at the bottom of the hot water storage tank 8 with the a port of the three-way valve 11.
  • the HP going pipe 14 connects the c port of the three-way valve 11 to the inlet side of the HP unit 7.
  • the HP return pipe 15 connects the outlet side of the HP unit 7 and the c port of the four-way valve 18.
  • the hot water supply pipe 13 connects the d port of the four-way valve 18 and the hot water introduction outlet 8d at the upper part of the hot water storage tank 8.
  • the first bypass pipe 16 connects the a port of the four-way valve 18 and the hot water introduction port 8c provided between the central portion and the lower portion of the hot water storage tank 8.
  • the hot water introduction pipe 20a branches from the middle of the hot water supply pipe 13 and is connected to the primary side inlet of the bath heat exchanger 20.
  • the hot water outlet pipe 20b connects the primary side outlet of the bath heat exchanger 20 and the b port of the three-way valve 11.
  • the second bypass pipe 17 branches from between the heat source pump 12 in the HP going pipe 14 and the inlet side of the HP unit 7, and is connected to the b port of the four-way valve 18.
  • the first water supply pipe 9a is connected to a water source such as water supply, and the second water supply pipe 9b and the third water supply pipe 9c are connected to the other end of the first water supply pipe 9a via a pressure reducing valve 31.
  • the second water supply pipe 9b branches from the middle and is connected to the hot water supply mixing valve 22 and the bath mixing valve 23.
  • the hot water supply pipe 21 branches from the middle and is connected to the hot water supply mixing valve 22 and the bath mixing valve 23.
  • the first hot water supply pipe 24 is connected to the outlet of the hot water supply mixing valve 22, and the second hot water supply pipe 25 is connected to the outlet of the bath mixing valve 23.
  • a bath solenoid valve 26 for opening and closing the second hot water supply pipe 25 and a bath flow rate sensor 45 for detecting the flow rate of hot water passing through the second hot water supply pipe 25 are provided.
  • the hot water mixing valve 22 and the bath mixing valve 23 are remote control devices by the user by adjusting the flow rate ratio of the high temperature hot water supplied from the hot water supply pipe 21 and the low temperature water supplied from the second water supply pipe 9b. Generates hot water at the set temperature set in 44.
  • the hot water adjusted to the set temperature by the hot water supply mixing valve 22 is supplied from the first hot water supply pipe 24 to a faucet (not shown) such as a shower or a curan used by the user via a hot water tap 34.
  • the hot water adjusted to the set temperature by the bath mixing valve 23 is supplied from the second hot water supply pipe 25 to the bathtub 30 via the bath solenoid valve 26, the bath flow sensor 45, the bath going pipe 27, and the bath returning pipe 28. Will be done.
  • the heating capacity of the HP unit is 4.5 kW with respect to the tank capacity of 370 L
  • the heating capacity of the HP unit is 6.0 kW with respect to the tank capacity of 460 L.
  • the midnight time zone is exemplified as a time zone in which the electricity charge unit price is cheaper than other time zones among 24 hours a day, but the present invention is not limited to this, and the electricity charge unit price is one day.
  • the present disclosure can also be applied when there is a low-priced time zone within 24 hours, which is lower than other time zones.
  • the HP unit 7 of the hot water storage type water heater 35 has a rated heating capacity lower than the heating capacity capable of completing boiling in the middle of the night. That is, the rated heating capacity of the HP unit 7 in the present embodiment is lower than the heating capacity of the HP unit installed in the conventional hot water storage type water heater having the same capacity as the hot water storage tank 8.
  • the rated heating capacity corresponds to, for example, the heating capacity when operating under the performance evaluation conditions according to JIS.
  • the HP unit 7 has a rated heating capacity as a standard heating capacity, and a normal heating capacity is set to the rated heating capacity.
  • FIG. 2 is a diagram showing the relationship between the heating capacity of the HP unit 7 of the first embodiment and the amount of boiling water.
  • the hot water storage type water heater 35 according to the present embodiment, as shown in FIG. 2, for example, if the capacity of the hot water storage tank 8 is 370 L, the HP unit 7 having a rated heating capacity of 4.1 kW is combined to store hot water. If the capacity of the tank 8 is 460 L, the HP unit 7 having a rated heating capacity of 5.1 kW can be combined.
  • the combination of the capacity and the heating capacity of these hot water storage tanks is a combination in which the total amount of boiling may not be completed during the midnight time zone, for example, 8 hours.
  • the rated heating capacity of the HP unit 7 is set to be lower than that of the conventional one, so that the boiling amount is low during the midnight hours and during the daytime boiling operation. It can be operated with heating capacity and can improve COP.
  • the control device 36 controls the operation of the boiling operation.
  • the boiling operation is an operation in which low-temperature hot water is taken out from the lower part of the hot water storage tank 8, heated by the HP unit 7, and the heated high-temperature water flows into the hot water storage tank 8 from the upper part of the hot water storage tank 8.
  • the control device 36 predicts that the heating capacity of the HP unit 7 is insufficient, the control device 36 switches the heating capacity of the HP unit 7 from the rated heating capacity to a high heating capacity a2 higher than the rated heating capacity. ..
  • control device 36 controls to boil the hot water in the hot water storage tank 8 to the target hot water storage temperature every day during the midnight time zone. This is to concentrate the boiling operation in the midnight hours when the electricity rate is cheap.
  • the boiling operation performed in the midnight time zone is performed in one of two modes, the first mode and the second mode.
  • the first mode is a mode in which the boiling operation is performed with the target hot water storage temperature set to a temperature lower than the maximum hot water storage temperature.
  • the maximum hot water storage temperature is the highest temperature within the range that can be set as the hot water storage temperature.
  • the target hot water storage temperature in the first mode will also be referred to as a “low target temperature”.
  • the second mode is a mode in which the target hot water storage temperature is set as the maximum hot water storage temperature and the entire amount of hot water in the hot water storage tank 8 is boiled to the maximum hot water storage temperature.
  • the boiling in the second mode will also be referred to as "total boiling".
  • the second mode is a mode in which a larger amount of boiling is performed than in the first mode.
  • the maximum hot water storage temperature is 90 ° C. as an example, and in this case, the low target temperature is, for example, 85 ° C.
  • the control device 36 is configured to execute the boiling operation in the first mode in the midnight time zone at normal times.
  • the heating capacity of the HP unit 7 when boiling in the first mode is the rated heating capacity.
  • the control device 36 starts the boiling operation every day when the start time of the midnight time zone is reached, and the temperature of the hot water taken out from the lower part of the hot water storage tank 8 and flowing into the HP unit 7 reaches the low target temperature. The boiling operation is terminated at this stage.
  • the second mode it is determined that it is necessary to boil a larger amount of hot water during the midnight hours, for example, when it is expected that the amount of hot water used the next day will be higher than usual. It is done when When the total amount of heat is boiled in the second mode, if the heating capacity is expected to be insufficient for the total amount of heat required for boiling (hereinafter referred to as "required heating amount of heat"), the heating capacity of the HP unit 7 is increased. , The rated heating capacity can be switched to high heating capacity.
  • FIG. 3 is a diagram showing a change in the amount of boiling water when the heating capacity of the HP unit 7 is switched in the middle of boiling the entire amount in the midnight time zone.
  • the heating capacity is switched from the rated heating capacity to a higher heating capacity higher than the rated heating capacity at the timing 4 hours after the start of the midnight time zone, so that the entire amount is boiled during the midnight time zone. The raising can be completed.
  • the timing when switching the heating capacity in the second mode is calculated as follows. First, by subtracting the amount of remaining hot water in the hot water storage tank 8 (that is, the amount of heat storage) at the start time of the midnight time zone from the amount of heat when the total amount of hot water in the hot water storage tank 8 is set to the maximum hot water storage temperature, the amount of hot water in the hot water storage tank 8 is subtracted during the midnight time zone. The amount of heat that needs to be boiled The amount of heat that needs to be boiled is calculated.
  • the rated heating capacity is used so that the boiling is completed in the midnight time zone.
  • the control device 36 When boiling in the second mode, the control device 36 performs the boiling operation at the rated heating capacity during the first hour H1 from the start time of the midnight time zone, and at the time when the first hour H1 elapses. , The heating capacity of the HP unit 7 is switched from the rated heating capacity to the high heating capacity, and the boiling operation is continued. The control device 36 ends the boiling operation when the temperature of the hot water flowing into the HP unit 7 reaches the maximum hot water storage temperature. As a result, when the amount of hot water supplied during the daytime is large, a sufficient amount of hot water can be secured in the hot water storage tank 8. If the second time H2 calculated as described above is zero or less, it is expected that the entire amount of boiling can be completed at the rated heating capacity during the midnight time zone, so the heating capacity is not switched. ..
  • the hot water storage type water heater 35 in normal times, boiling is performed with a rated heating capacity lower than the heating capacity capable of completing boiling in the middle of the night. As a result, the energy efficiency of the hot water storage type water heater 35 can be increased, and when it is necessary to boil the entire amount, the heating capacity can be switched to the high heating capacity for the minimum time required to secure the amount of heat. As a result, it is possible to suppress the occurrence of insufficient hot water during the daytime.
  • the rated heating capacity is at least lower than the maximum heating capacity of the HP unit 7 and lower than the high heating capacity. Further, the rated heating capacity is set to at least the capacity that can complete the boiling at the low target temperature of the first mode within the midnight time zone.
  • the operating cost of the hot water storage type water heater 35 can be reduced and it is recognized as a nighttime heat storage type device by configuring the boiling water to a low target temperature by using the midnight time zone. If the rated heating capacity is set too low, the COP may decrease. Therefore, the rated heating capacity may be set to the capacity at which the COP is the best.
  • the heating capacity of the HP unit 7 is the rated heating capacity when boiling in the first mode.
  • COP can be improved.
  • the present invention is not limited to this, and for example, when the rated heating capacity is low and the heating capacity is expected to be insufficient even when boiling in the first mode, as in the case of the second mode, in the middle of the process. It may be configured to switch to a high heating capacity. As a result, the required amount of heat can be reliably secured.
  • the hot water storage type water heater 35 may have a configuration in which the user can set the heating capacity to be fixed to the rated heating capacity by the remote control device 44. While the control device 36 is set to be fixed at the rated heating capacity, the control device 36 does not change to the high heating capacity even when the entire amount is boiled at midnight, and the target hot water storage temperature is lowered while maintaining the rated heating capacity. Boil as the target temperature. For example, when the user attaches great importance to COP, the user's setting is prioritized, and the usability of the user of the hot water storage type water heater 35 can be improved.
  • the hot water storage type water heater 35 may have a configuration in which the user can set the heating capacity to be fixed to a high heating capacity by a remote control device. While the control device 36 is set to be fixed to a high heating capacity, the control device 36 is operated with a high heating capacity with the target hot water storage temperature as the maximum hot water storage temperature even when the boiling is executed in the first mode at midnight. I do. For example, when the user attaches great importance to preventing the shortage of hot water, the user's setting can be prioritized, and the usability of the user of the hot water storage type water heater 35 can be improved.
  • the hot water storage type water heater 35 may have a configuration in which the user can set the total amount of boiling in the midnight time zone by the remote control device 44.
  • the boiling operation in the midnight time zone is set to the second mode, and the total amount of boiling is executed.
  • the second time H2 which is the time for the boiling operation with the high heating capacity, is calculated as described above, and the end time of the midnight time zone is calculated.
  • the HP unit 7 is switched to a high heating capacity and boiling is performed. As a result, the amount of hot water stored by the user can be secured.
  • the hot water storage type water heater 35 may have a configuration in which the user can instruct the start of boiling the whole amount by the remote control device 44.
  • the remote controller device 44 may be provided with a "full tank” button for boiling the entire amount, and by pressing this button, the start of boiling the entire amount may be instructed.
  • the control device 36 When the remote control device 44 receives the instruction of "full tank”, the control device 36 immediately switches the heating capacity of the HP unit 7 to the high heating capacity and starts the operation in the second mode. As a result, it is possible to give priority to boiling quickly in response to the user's instruction.
  • the rated heating capacity is used. After the boiling of the above, the case where the boiling is performed with a high heating capacity for H2 for the second hour has been described. At the start of the midnight time zone, it is expected that there will be a lot of power usage by other devices. Therefore, from the start time of the midnight time zone to the first hour H1, the peak power consumption can be suppressed by carrying out the boiling operation with the rated heating capacity having low power consumption.
  • the hot water storage type water heater 35 is not limited to the configuration in which the operation at the rated heating capacity is performed first. In the case of boiling the whole amount, it is possible to continue the boiling operation by switching to the rated heating capacity after boiling with a high heating capacity during the above-mentioned second hour H2 from the start of the midnight time zone. good. By starting boiling with a high heating capacity at the start of the midnight time zone, it is possible to cope with a case where hot water is used in the middle and the amount of remaining hot water in the hot water storage tank 8 is reduced.
  • the operating time for boiling with a high heating capacity should be extended so that the required amount of heating heat is secured even after the hot water is used. Just do it.
  • the required amount of heat can be secured by switching to the high heating capacity again.
  • the user determines whether the boiling operation at the rated heating capacity is performed first or the boiling operation at the high heating capacity is performed first by the remote controller device 44. It may have a configuration that can be set.
  • the control device 36 is configured to switch the heating capacity in an order according to the user's selection when the whole amount is boiled.

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Abstract

A hot water storage-type water heater according to the present disclosure comprises: a heating means configured such that the heating capacity for heating water can be changed; a hot water storage tank capable of storing water heated by the heating means; and a control device configured so as to control switching of the heating capacity of the heating means and to control a boiling operation which stores water heated by the heating means in the hot water storage tank. During low-priced time periods, the rated heating capacity of the heating means is lower than a heating capacity capable of completing total boiling, which boils all of the water in the hot water storage tank to the maximum settable hot water temperature.

Description

貯湯式給湯機Hot water storage type water heater
　本開示は、貯湯式給湯機に関する。 This disclosure relates to a hot water storage type water heater.
　貯湯式給湯機では、電気料金が割安な深夜時間帯に沸き上げ運転を集中させるため、深夜時間帯に、貯湯タンク内の湯水の全量を、設定可能な最高温度に沸き上げることが一般に行われている。貯湯式給湯機では、貯湯タンクに対して、深夜時間帯の全量の沸き上げを完了できる加熱能力を有する加熱手段を組み合わるのが一般的である。 In hot water storage type water heaters, in order to concentrate the boiling operation during the midnight hours when electricity charges are cheap, it is common practice to boil the entire amount of hot water in the hot water storage tank to the maximum temperature that can be set during the midnight hours. ing. In a hot water storage type water heater, it is common to combine a hot water storage tank with a heating means having a heating capacity capable of completing boiling of the entire amount during the midnight hours.
　また、特許文献１には、加熱能力を変更することができる貯湯式給湯機が記載されている。特許文献１に記載の貯湯式給湯機における深夜時間帯の沸き上げ運転では、深夜時間帯の終了時刻までに全量の沸き上げを完了することができる加熱能力での沸き上げ運転が行われる。この沸き上げ運転中に突発的に湯が使用された場合、必要湯量の沸き上げが完了しないと判断される場合には、加熱能力はより高い加熱能力に変更される。 Further, Patent Document 1 describes a hot water storage type water heater whose heating capacity can be changed. In the boiling operation of the hot water storage type water heater described in Patent Document 1 in the midnight time zone, the boiling operation is performed with a heating capacity capable of completing the boiling of the entire amount by the end time of the midnight time zone. If hot water is suddenly used during this boiling operation and it is determined that boiling of the required amount of hot water is not completed, the heating capacity is changed to a higher heating capacity.
日本特開２０１０－１２７５６９号公報Japanese Patent Application Laid-Open No. 2010-127569
　深夜時間帯の沸き上げる運転の加熱能力が、貯湯タンクの全量の湯を沸き上げることができる加熱能力に設定されている場合、貯湯タンク内の湯水の全量を沸き上げる必要が無い場合には、却ってエネルギー効率が低くなる虞がある。 If the heating capacity of the boiling operation during the midnight hours is set to the heating capacity that can boil the entire amount of hot water in the hot water storage tank, and if it is not necessary to boil the entire amount of hot water in the hot water storage tank, On the contrary, there is a risk that energy efficiency will be low.
　本開示は、上記の課題を解決するためになされたもので、全量の沸き上げが必要ない場合にも効率的な加熱能力で沸き上げ運転を行うことができるように改良された貯湯式給湯機を提供することを目的とする。 This disclosure is made to solve the above-mentioned problems, and is an improved hot water storage type water heater that can perform boiling operation with efficient heating capacity even when the total amount of boiling is not required. The purpose is to provide.
　本開示に係る貯湯式給湯機は、水を加熱する加熱能力を変更可能に構成された加熱手段と、加熱手段により加熱された水を貯湯することができる貯湯タンクと、加熱手段の加熱能力の切り替えを制御すると共に、加熱手段により加熱した水を貯湯タンクに貯湯する沸き上げ運転を制御するように構成された制御装置と、を備える。加熱手段の定格加熱能力は、低料金時間帯の間に、貯湯タンクの水全量を設定可能な最高貯湯温度に沸き上げる全量沸き上げを完了できる加熱能力よりも、低い能力である。 The hot water storage type water heater according to the present disclosure has a heating means configured to change the heating capacity for heating water, a hot water storage tank capable of storing water heated by the heating means, and a heating capacity of the heating means. It is provided with a control device configured to control switching and to control a boiling operation in which water heated by a heating means is stored in a hot water storage tank. The rated heating capacity of the heating means is lower than the heating capacity capable of completing the total boiling of the total amount of water in the hot water storage tank to the settable maximum hot water storage temperature during the low charge time period.
　本開示によれば、沸き上げる必要がある熱量が小さい場合に、効率的な加熱能力で沸き上げ運転を行うことができる。 According to the present disclosure, when the amount of heat that needs to be boiled is small, the boiling operation can be performed with an efficient heating capacity.
本開示の実施の形態１に係る貯湯式給湯機の全体構成を模式的に示す図である。It is a figure which shows typically the whole structure of the hot water storage type water heater which concerns on Embodiment 1 of this disclosure. 本開示の実施の形態１に係る貯湯式給湯機のヒートポンプユニットの加熱能力と沸き上げ湯量との関係を示す図である。It is a figure which shows the relationship between the heating capacity of the heat pump unit of the hot water storage type water heater which concerns on Embodiment 1 of this disclosure, and the amount of boiling water. 本開示の実施の形態１に係る貯湯式給湯機における全量沸き上げの途中でヒートポンプユニット７の加熱能力を切り替えた場合の沸き上げ湯量の変化を示す図である。It is a figure which shows the change of the boiling water amount when the heating capacity of a heat pump unit 7 is switched in the middle of the whole amount boiling in the hot water storage type water heater which concerns on Embodiment 1 of this disclosure.
　以下、図面を参照して本開示の実施の形態について説明する。なお、各図において共通する要素には、同一の符号を付して、重複する説明を省略する。なお、本開示において、単に「水」または「湯」と記載した場合には、低温の水から、高温の湯まで、あらゆる温度の液体の水が含まれうる。また、本開示では、湯が持っている熱量を、所定温度の湯に換算した湯量として扱う場合がある。すなわち、本開示において、「湯量」との記載は実質的には熱量を意味する場合がある。 Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The elements common to each figure are designated by the same reference numerals, and duplicate description will be omitted. In the present disclosure, when the term "water" or "hot water" is simply used, liquid water of any temperature, from low-temperature water to high-temperature hot water, may be included. Further, in the present disclosure, the amount of heat possessed by hot water may be treated as the amount of hot water converted into hot water having a predetermined temperature. That is, in the present disclosure, the description of "the amount of hot water" may substantially mean the amount of heat.
実施の形態１．
　図１は、本開示の実施の形態１に係る貯湯式給湯機の全体構成を模式的に示す図である。貯湯式給湯機３５は、タンクユニット３３と、ＨＰ（ヒートポンプ）ユニット７と、リモコン装置４４とを備えている。ＨＰユニット７とタンクユニット３３とは、ＨＰ往き配管１４とＨＰ戻り配管１５と図示しない電気配線とを介して接続されている。 Embodiment 1.
FIG. 1 is a diagram schematically showing an overall configuration of a hot water storage type water heater according to a first embodiment of the present disclosure. The hot water storage type water heater 35 includes a tank unit 33, an HP (heat pump) unit 7, and a remote control device 44. The HP unit 7 and the tank unit 33 are connected to each other via an HP going pipe 14, an HP returning pipe 15, and an electric wiring (not shown).
　タンクユニット３３には制御装置３６が内蔵されている。タンクユニット３３およびＨＰユニット７が備える各種弁類、ポンプ類等の作動は、これらと電気的に接続された制御装置３６により制御される。 The tank unit 33 has a built-in control device 36. The operation of various valves, pumps, etc. included in the tank unit 33 and the HP unit 7 is controlled by the control device 36 electrically connected to them.
　制御装置３６とリモコン装置４４とは有線又は無線により、相互通信可能な状態で接続されている。リモコン装置４４は、ユーザーインターフェースの例である。図示を省略するが、リモコン装置４４は、貯湯式給湯機３５の運転状態等の情報を表示する表示部、使用者が操作するスイッチ等の操作部、スピーカ、マイク等が搭載されている。操作部は、貯湯式給湯機の運転動作指令及び設定値の変更などに関する使用者の操作を受け付ける。 The control device 36 and the remote control device 44 are connected by wire or wireless so that they can communicate with each other. The remote control device 44 is an example of a user interface. Although not shown, the remote controller 44 is equipped with a display unit that displays information such as the operating state of the hot water storage type water heater 35, an operation unit such as a switch operated by the user, a speaker, a microphone, and the like. The operation unit receives the user's operation regarding the operation operation command of the hot water storage type water heater and the change of the set value.
　リモコン装置４４は、例えば台所、リビング、浴室などの壁に設置されたものでもよい。複数のリモコン装置４４が制御装置３６に対して通信可能でもよい。また、例えばスマートフォンのような携帯端末がリモコン装置４４のようなユーザーインターフェースとしての機能を有する構成としてもよい。この場合、当該携帯端末と制御装置３６とが、ネットワークを介して通信可能な構成であってもよい。 The remote controller 44 may be installed on a wall such as a kitchen, a living room, or a bathroom. A plurality of remote control devices 44 may be able to communicate with the control device 36. Further, for example, a mobile terminal such as a smartphone may have a function as a user interface such as the remote control device 44. In this case, the mobile terminal and the control device 36 may be configured to be able to communicate with each other via a network.
　ＨＰユニット７は水を加熱するための加熱手段として機能する。ＨＰユニット７は、圧縮機１、水冷媒熱交換器３、膨張弁４、及び、空気熱交換器６を冷媒配管５にて環状に接続し、ヒートポンプサイクルを構成している。水冷媒熱交換器３は、冷媒配管５を流れる冷媒とタンクユニット３３から導かれた低温水との間で熱交換を行うためのものである。 The HP unit 7 functions as a heating means for heating water. The HP unit 7 constitutes a heat pump cycle by connecting the compressor 1, the water-refrigerant heat exchanger 3, the expansion valve 4, and the air heat exchanger 6 in an annular shape by the refrigerant pipe 5. The water-refrigerant heat exchanger 3 is for exchanging heat between the refrigerant flowing through the refrigerant pipe 5 and the low-temperature water led from the tank unit 33.
　本実施の形態では、ＨＰユニット７の冷媒回路による加熱能力の値を変更することができる。以下の説明では、ＨＰユニット７の加熱能力を単に「加熱能力」と呼ぶ場合がある。加熱能力は、例えば、ＨＰユニット７が時間当たりに水に与える熱量に相当する。加熱能力の単位は、例えば、ｋＷ（キロワット）である。 In this embodiment, the value of the heating capacity of the HP unit 7 by the refrigerant circuit can be changed. In the following description, the heating capacity of the HP unit 7 may be simply referred to as "heating capacity". The heating capacity corresponds to, for example, the amount of heat that the HP unit 7 gives to water per hour. The unit of heating capacity is, for example, kW (kilowatt).
　タンクユニット３３には、以下の各種部品や配管などが内蔵されている。貯湯タンク８は、湯水を貯留するためのものである。貯湯タンク８の下部に設けられた水導入口８ａには、第３給水配管９ｃが接続されている。水道等の水源から供給される水は、減圧弁３１で所定圧力に調圧された上で、第３給水配管９ｃを通って貯湯タンク８内に流入する。貯湯タンク８の上部に設けられた温水導入出口８ｄには、貯湯タンク８内に貯留された湯を貯湯式給湯機３５の外部へ供給するための給湯配管２１と、送湯配管１３とが接続されている。 The tank unit 33 contains the following various parts and pipes. The hot water storage tank 8 is for storing hot water. A third water supply pipe 9c is connected to the water introduction port 8a provided at the lower part of the hot water storage tank 8. The water supplied from a water source such as tap water 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. The hot water supply pipe 21 for supplying the hot water stored in the hot water storage tank 8 to the outside of the hot water storage type water heater 35 and the hot water supply pipe 13 are connected to the hot water introduction outlet 8d provided in the upper part of the hot water storage tank 8. Has been done.
　ＨＰユニット７を用いて加熱された高温湯は、温水導入出口８ｄから貯湯タンク８に流入する。一方、第３給水配管９ｃからの低温水は、水導入口８ａから貯湯タンク８に流入する。これにより貯湯タンク８には、上下部で温度差が生じるように湯水が貯留される。貯湯タンク８の表面には、複数の貯湯温度センサ４２，４３が高さを変えて取り付けられている。これら貯湯温度センサ４２，４３で貯湯タンク８内の湯水の温度分布を検出することにより、貯湯タンク８内の残湯量が把握され、これに基づいてＨＰユニット７による貯湯タンク８内の湯水の沸き上げ運転の開始、停止などが制御される。 The hot water heated by the HP unit 7 flows into the hot water storage tank 8 from the hot water introduction outlet 8d. On the other hand, the low temperature water from the third water supply pipe 9c flows into the hot water storage tank 8 from the water introduction port 8a. As a result, hot water is stored in the hot water storage tank 8 so that a temperature difference occurs between the upper and lower parts. A plurality of hot water storage temperature sensors 42, 43 are attached to the surface of the hot water storage tank 8 at different heights. By detecting the temperature distribution of the hot water in the hot water storage tank 8 with these hot water storage temperature sensors 42 and 43, the amount of remaining hot water in the hot water storage tank 8 is grasped, and based on this, the hot water in the hot water storage tank 8 is boiled by the HP unit 7. The start and stop of raising operation are controlled.
　タンクユニット３３内には、熱源ポンプ１２及びふろ用熱交換器２０が内蔵されている。熱源ポンプ１２は、タンクユニット３３内の後述する各種配管に湯水を循環させるためのポンプであり、ＨＰ往き配管１４上に設けられている。 A heat source pump 12 and a bath heat exchanger 20 are built in the tank unit 33. The heat source pump 12 is a pump for circulating hot water to various pipes described later in the tank unit 33, and is provided on the HP going pipe 14.
　ふろ用熱交換器２０は、貯湯タンク８又はＨＰユニット７から供給される高温湯を利用して、２次側の加熱対象水（浴槽水や暖房用水など）を加熱するための熱交換器である。本実施の形態では、ふろ用熱交換器２０の２次側の構成として、浴槽３０内の湯水を循環させるふろ往き配管２７とふろ戻り配管２８とを例示し説明する。ふろ用熱交換器２０は、ふろ往き配管２７とふろ戻り配管２８との途中に設置されている。また、ふろ戻り配管２８の途中には、浴槽水を循環させるためのふろ循環ポンプ２９が設置されている。 The bath heat exchanger 20 is a heat exchanger for heating the water to be heated (bathtub water, heating water, etc.) on the secondary side by using the high temperature hot water supplied from the hot water storage tank 8 or the HP unit 7. be. In the present embodiment, as a configuration on the secondary side of the bath heat exchanger 20, a bath going pipe 27 and a bath returning pipe 28 for circulating hot water in the bathtub 30 will be illustrated and described. The bath heat exchanger 20 is installed in the middle of the bath going pipe 27 and the bath returning pipe 28. Further, a bath circulation pump 29 for circulating bathtub water is installed in the middle of the bath return pipe 28.
　三方弁１１は、湯水が流入するａポート及びｂポートと、湯水が流出するｃポートと、を有する流路切替手段であり、２つの経路、ａ－ｃ、及び、ｂ－ｃの間で流路を切り替えることができる。四方弁１８は、湯水が流入するｂポート及びｃポートと、湯水が流出するａポート及びｄポートと、を有する流路切替手段であり、４つの経路、ｂ－ａ、ｃ－ａ、ｂ－ｄ、及び、ｃ－ｄの間で流路切替可能に構成されている。 The three-way valve 11 is a flow path switching means having an a port and a b port for hot water to flow in and a c port for hot water to flow out, and flows between two paths, ac and bc. You can switch routes. The four-way valve 18 is a flow path switching means having b-ports and c-ports for hot water to flow in and a-ports and d-ports for hot water to flow out, and has four routes, ba, ca, b-. The flow path can be switched between d and cd.
　水導出口配管１０は、貯湯タンク８の下部に設けられた水導出口８ｂと三方弁１１のａポートとを接続する。ＨＰ往き配管１４は、三方弁１１のｃポートとＨＰユニット７の入口側とを接続する。ＨＰ戻り配管１５は、ＨＰユニット７の出口側と四方弁１８のｃポートとを接続する。送湯配管１３は、四方弁１８のｄポートと、貯湯タンク８上部の温水導入出口８ｄとを接続する。第１バイパス配管１６は、四方弁１８のａポートと、貯湯タンク８の中央部から下部の間に設けられた温水導入口８ｃとを接続する。温水導入配管２０ａは、送湯配管１３の途中から分岐し、ふろ用熱交換器２０の１次側入口に接続される。温水導出配管２０ｂは、ふろ用熱交換器２０の１次側出口と三方弁１１のｂポートとを接続する。第２バイパス配管１７は、ＨＰ往き配管１４における熱源ポンプ１２とＨＰユニット７の入口側との間から分岐し、四方弁１８のｂポートに接続される。 The water outlet pipe 10 connects the water outlet 8b provided at the bottom of the hot water storage tank 8 with the a port of the three-way valve 11. The HP going pipe 14 connects the c port of the three-way valve 11 to the inlet side of the HP unit 7. The HP return pipe 15 connects the outlet side of the HP unit 7 and the c port of the four-way valve 18. The hot water supply pipe 13 connects the d port of the four-way valve 18 and the hot water introduction outlet 8d at the upper part of the hot water storage tank 8. The first bypass pipe 16 connects the a port of the four-way valve 18 and the hot water introduction port 8c provided between the central portion and the lower portion of the hot water storage tank 8. The hot water introduction pipe 20a branches from the middle of the hot water supply pipe 13 and is connected to the primary side inlet of the bath heat exchanger 20. The hot water outlet pipe 20b connects the primary side outlet of the bath heat exchanger 20 and the b port of the three-way valve 11. The second bypass pipe 17 branches from between the heat source pump 12 in the HP going pipe 14 and the inlet side of the HP unit 7, and is connected to the b port of the four-way valve 18.
　第１給水配管９ａの一端は水道等の水源に接続され、第１給水配管９ａの他端には減圧弁３１を介して第２給水配管９ｂ及び第３給水配管９ｃが接続されている。第２給水配管９ｂは、途中から分岐して給湯用混合弁２２とふろ用混合弁２３とに接続されている。給湯配管２１は、途中から分岐して給湯用混合弁２２とふろ用混合弁２３とに接続されている。給湯用混合弁２２の流出口には第１給湯配管２４が接続され、ふろ用混合弁２３の流出口には第２給湯配管２５が接続されている。第２給湯配管２５の途中には、第２給湯配管２５を開閉するふろ用電磁弁２６と、第２給湯配管２５を通る湯の流量を検出するふろ用流量センサ４５とが設けられている。 One end of the first water supply pipe 9a is connected to a water source such as water supply, and the second water supply pipe 9b and the third water supply pipe 9c are connected to the other end of the first water supply pipe 9a via a pressure reducing valve 31. The second water supply pipe 9b branches from the middle and is connected to the hot water supply mixing valve 22 and the bath mixing valve 23. The hot water supply pipe 21 branches from the middle and is connected to the hot water supply mixing valve 22 and the bath mixing valve 23. The first hot water supply pipe 24 is connected to the outlet of the hot water supply mixing valve 22, and the second hot water supply pipe 25 is connected to the outlet of the bath mixing valve 23. In the middle of the second hot water supply pipe 25, a bath solenoid valve 26 for opening and closing the second hot water supply pipe 25 and a bath flow rate sensor 45 for detecting the flow rate of hot water passing through the second hot water supply pipe 25 are provided.
　給湯用混合弁２２及びふろ用混合弁２３は、給湯配管２１から供給される高温湯と、第２給水配管９ｂから供給される低温水との流量比を調整することにより、使用者がリモコン装置４４にて設定した設定温度の湯を生成する。給湯用混合弁２２で設定温度に調整された湯は、第１給湯配管２４から給湯栓３４を経由して、使用者が使用するシャワーやカラン等の蛇口（図示しない）に供給される。一方、ふろ用混合弁２３で設定温度に調整された湯は、第２給湯配管２５からふろ用電磁弁２６、ふろ用流量センサ４５、ふろ往き配管２７、ふろ戻り配管２８を経て浴槽３０に供給される。 The hot water mixing valve 22 and the bath mixing valve 23 are remote control devices by the user by adjusting the flow rate ratio of the high temperature hot water supplied from the hot water supply pipe 21 and the low temperature water supplied from the second water supply pipe 9b. Generates hot water at the set temperature set in 44. The hot water adjusted to the set temperature by the hot water supply mixing valve 22 is supplied from the first hot water supply pipe 24 to a faucet (not shown) such as a shower or a curan used by the user via a hot water tap 34. On the other hand, the hot water adjusted to the set temperature by the bath mixing valve 23 is supplied from the second hot water supply pipe 25 to the bathtub 30 via the bath solenoid valve 26, the bath flow sensor 45, the bath going pipe 27, and the bath returning pipe 28. Will be done.
　ところで、従来の貯湯式給湯機においては、１日のうちで、他の時間帯に比べて電気料金単価の低い低料金時間帯である深夜時間帯、例えば２３時～翌日７時の８時間の内に、定格加熱能力で全量沸き上げを完了することができる能力を有するＨＰユニットが、貯湯タンクの容量に応じて、組み合わせられている。一例としては、タンク容量３７０Ｌに対し、ＨＰユニットの加熱能力が４．５ｋＷ、タンク容量４６０Ｌに対し、ＨＰユニットの加熱能力が６．０ｋＷである。この能力であれば、ＨＰユニットに入水する温度５℃の湯を最高貯湯温度９０℃とする全量沸き上げを、深夜時間帯の８時間以内に完了することができる。なお、本実施の形態の開示では、電気料金単価が１日２４時間のうちで他時間帯と比べて安い時間帯として深夜時間帯を例示したが、これに限らず、電気料金単価が１日２４時間のうちで他時間帯と比べて低い低料金時間帯がある場合にも、本開示を適用することができる。 By the way, in the conventional hot water storage type water heater, in the midnight time zone, which is a low charge time zone in which the unit price of electricity is lower than other time zones, for example, 8 hours from 23:00 to 7:00 the next day. Inside, HP units having the ability to complete boiling of the entire amount at the rated heating capacity are combined according to the capacity of the hot water storage tank. As an example, the heating capacity of the HP unit is 4.5 kW with respect to the tank capacity of 370 L, and the heating capacity of the HP unit is 6.0 kW with respect to the tank capacity of 460 L. With this ability, it is possible to complete the total boiling of hot water having a temperature of 5 ° C., which enters the HP unit, to a maximum hot water storage temperature of 90 ° C. within 8 hours in the midnight time zone. In the disclosure of the present embodiment, the midnight time zone is exemplified as a time zone in which the electricity charge unit price is cheaper than other time zones among 24 hours a day, but the present invention is not limited to this, and the electricity charge unit price is one day. The present disclosure can also be applied when there is a low-priced time zone within 24 hours, which is lower than other time zones.
　しかし、一般に、ＨＰユニットの加熱能力が低い方が効率（即ち、ＣＯＰ；Ｃｏｅｆｆｉｃｉｅｎｔ　Ｏｆ　Ｐｅｒｆｏｒｍａｎｃｅ）は良い傾向にあり、全量沸き上げの必要が無い場合にまで、全量沸き上げが可能な高い加熱能力での運転を実行することは、効率を低下させることとなる。 However, in general, the lower the heating capacity of the HP unit, the better the efficiency (that is, COP; Coefficient Of Performance), and even when it is not necessary to boil the entire amount, the heating capacity is high enough to boil the entire amount. Performing this operation will reduce efficiency.
　そこで、本実施の形態に係る貯湯式給湯機３５のＨＰユニット７は、その定格加熱能力が、深夜時間帯に全量沸き上げを完了できる加熱能力よりも低い能力のものとなっている。つまり本実施の形態でのＨＰユニット７の定格加熱能力は、貯湯タンク８と同一容量の貯湯タンクを有する従来の貯湯式給湯機に設置されるＨＰユニットの加熱能力よりも低くなっている。なお、定格加熱能力とは、例えばＪＩＳによる性能評価条件で運転するときの加熱能力に相当する。ＨＰユニット７は、定格加熱能力を標準の加熱能力とし、通常時の加熱能力は定格加熱能力に設定されている。 Therefore, the HP unit 7 of the hot water storage type water heater 35 according to the present embodiment has a rated heating capacity lower than the heating capacity capable of completing boiling in the middle of the night. That is, the rated heating capacity of the HP unit 7 in the present embodiment is lower than the heating capacity of the HP unit installed in the conventional hot water storage type water heater having the same capacity as the hot water storage tank 8. The rated heating capacity corresponds to, for example, the heating capacity when operating under the performance evaluation conditions according to JIS. The HP unit 7 has a rated heating capacity as a standard heating capacity, and a normal heating capacity is set to the rated heating capacity.
　図２は、実施の形態１のＨＰユニット７の加熱能力と沸き上げ湯量との関係を示す図である。本実施の形態に係る貯湯式給湯機３５では、図２に示されるように、例えば、貯湯タンク８の容量が３７０Ｌであれば、定格加熱能力が４．１ｋＷのＨＰユニット７が組み合わせられ、貯湯タンク８の容量が４６０Ｌであれば定格加熱能力が５．１ｋＷのＨＰユニット７が組み合わせられる。図２に示されるように、これらの貯湯タンクの容量と加熱能力との組み合わせは、深夜時間帯の例えば８時間の間には、全量沸き上げを完了できない可能性がある組み合わせである。 FIG. 2 is a diagram showing the relationship between the heating capacity of the HP unit 7 of the first embodiment and the amount of boiling water. In the hot water storage type water heater 35 according to the present embodiment, as shown in FIG. 2, for example, if the capacity of the hot water storage tank 8 is 370 L, the HP unit 7 having a rated heating capacity of 4.1 kW is combined to store hot water. If the capacity of the tank 8 is 460 L, the HP unit 7 having a rated heating capacity of 5.1 kW can be combined. As shown in FIG. 2, the combination of the capacity and the heating capacity of these hot water storage tanks is a combination in which the total amount of boiling may not be completed during the midnight time zone, for example, 8 hours.
　本実施の形態に係る貯湯式給湯機３５では、ＨＰユニット７の定格加熱能力を従来に比べ低いものとすることで、深夜時間帯の沸き上げ量が少ないとき及び昼間の沸き上げ運転で、低加熱能力で運転することができ、ＣＯＰを向上させることができる。 In the hot water storage type water heater 35 according to the present embodiment, the rated heating capacity of the HP unit 7 is set to be lower than that of the conventional one, so that the boiling amount is low during the midnight hours and during the daytime boiling operation. It can be operated with heating capacity and can improve COP.
　制御装置３６は、沸き上げ運転の動作を制御する。沸き上げ運転は、貯湯タンク８の下部から低温の湯水を取り出して、ＨＰユニット７にて加熱し、加熱した高温水を貯湯タンク８の上部から貯湯タンク８に流入させる運転である。沸き上げ運転に際し、制御装置３６は、ＨＰユニット７の加熱能力が不足すると予想した場合には、ＨＰユニット７の加熱能力を、定格加熱能力から、定格加熱能力よりも高い高加熱能力ａ２に切り替える。 The control device 36 controls the operation of the boiling operation. The boiling operation is an operation in which low-temperature hot water is taken out from the lower part of the hot water storage tank 8, heated by the HP unit 7, and the heated high-temperature water flows into the hot water storage tank 8 from the upper part of the hot water storage tank 8. In the boiling operation, when the control device 36 predicts that the heating capacity of the HP unit 7 is insufficient, the control device 36 switches the heating capacity of the HP unit 7 from the rated heating capacity to a high heating capacity a2 higher than the rated heating capacity. ..
　また、制御装置３６は、毎日、深夜時間帯の間に、貯湯タンク８内の湯水を目標貯湯温度に沸き上げる制御を行う。これは、電気料金が割安な深夜時間帯に沸き上げ運転を集中させるためである。 Further, the control device 36 controls to boil the hot water in the hot water storage tank 8 to the target hot water storage temperature every day during the midnight time zone. This is to concentrate the boiling operation in the midnight hours when the electricity rate is cheap.
　本実施の形態において、深夜時間帯に行われる沸き上げ運転は、第１モードと第２モードの２つのモードの何れかのモードで行われる。一方、第１モードは、目標貯湯温度を、最高貯湯温度よりも低い温度として沸き上げ運転を行うモードである。最高貯湯温度とは、貯湯温度として設定可能な範囲のなかでの最高の温度である。以下では、第１モードの目標貯湯温度を「低目標温度」とも称することとする。第２モードは、目標貯湯温度を最高貯湯温度とし、貯湯タンク８内の湯水の全量を最大貯湯温度に沸き上げるモードである。以下では、第２モードの沸き上げを、「全量沸き上げ」とも称することとする。言い換えると、第２モードは、第１モードよりも多めの沸き上げを行うモードである。なお、最高貯湯温度は、一例として、９０℃であり、この場合、低目標温度は、例えば８５℃である。 In the present embodiment, the boiling operation performed in the midnight time zone is performed in one of two modes, the first mode and the second mode. On the other hand, the first mode is a mode in which the boiling operation is performed with the target hot water storage temperature set to a temperature lower than the maximum hot water storage temperature. The maximum hot water storage temperature is the highest temperature within the range that can be set as the hot water storage temperature. Hereinafter, the target hot water storage temperature in the first mode will also be referred to as a “low target temperature”. The second mode is a mode in which the target hot water storage temperature is set as the maximum hot water storage temperature and the entire amount of hot water in the hot water storage tank 8 is boiled to the maximum hot water storage temperature. Hereinafter, the boiling in the second mode will also be referred to as "total boiling". In other words, the second mode is a mode in which a larger amount of boiling is performed than in the first mode. The maximum hot water storage temperature is 90 ° C. as an example, and in this case, the low target temperature is, for example, 85 ° C.
　制御装置３６は、通常時は、深夜時間帯に第１モードでの沸き上げ運転を実行するように構成されている。第１モードで沸き上げを行う場合のＨＰユニット７の加熱能力は、定格加熱能力である。制御装置３６は、毎日、深夜時間帯の開始時刻に達したときに、沸き上げ運転を開始し、貯湯タンク８の下部から取り出されＨＰユニット７に流入する湯水の温度が、低目標温度に達した段階で沸き上げ運転を終了とする。 The control device 36 is configured to execute the boiling operation in the first mode in the midnight time zone at normal times. The heating capacity of the HP unit 7 when boiling in the first mode is the rated heating capacity. The control device 36 starts the boiling operation every day when the start time of the midnight time zone is reached, and the temperature of the hot water taken out from the lower part of the hot water storage tank 8 and flowing into the HP unit 7 reaches the low target temperature. The boiling operation is terminated at this stage.
　第２モードの全量沸き上げは、例えば、翌日の給湯使用量が通常より多いことが予想される場合など、深夜時間帯のうちに通常より多くの湯量を沸き上げておく必要があると判断される場合に行われる。第２モードで全量沸き上げを行う場合、全量沸き上げに必要な熱量（以下「必要沸上熱量」）に対して、加熱能力の不足が予想される場合には、ＨＰユニット７の加熱能力が、定格加熱能力から高加熱能に切り替えられる。 In the second mode, it is determined that it is necessary to boil a larger amount of hot water during the midnight hours, for example, when it is expected that the amount of hot water used the next day will be higher than usual. It is done when When the total amount of heat is boiled in the second mode, if the heating capacity is expected to be insufficient for the total amount of heat required for boiling (hereinafter referred to as "required heating amount of heat"), the heating capacity of the HP unit 7 is increased. , The rated heating capacity can be switched to high heating capacity.
　図３は、深夜時間帯の全量沸き上げの途中でＨＰユニット７の加熱能力を切り替えた場合の、沸き上げ湯量の変化を示す図である。図３の例では、深夜時間帯の開始から４時間後のタイミングで、加熱能力が定格加熱能力から、定格加熱能力よりも高い高加熱能力に切り替えられることで、深夜時間帯のうちに全量沸き上げが完了可能となっている。 FIG. 3 is a diagram showing a change in the amount of boiling water when the heating capacity of the HP unit 7 is switched in the middle of boiling the entire amount in the midnight time zone. In the example of FIG. 3, the heating capacity is switched from the rated heating capacity to a higher heating capacity higher than the rated heating capacity at the timing 4 hours after the start of the midnight time zone, so that the entire amount is boiled during the midnight time zone. The raising can be completed.
　第２モードでの加熱能力の切り替える場合のタイミングは、以下のように算出される。まず、貯湯タンク８の全量の湯を最高貯湯温度にした場合の熱量から、深夜時間帯の開始時刻における貯湯タンク８の残湯量（即ち、蓄熱量）を差し引くことで、深夜時間帯のうちに沸き上げる必要がある熱量沸上熱量が算出される。 The timing when switching the heating capacity in the second mode is calculated as follows. First, by subtracting the amount of remaining hot water in the hot water storage tank 8 (that is, the amount of heat storage) at the start time of the midnight time zone from the amount of heat when the total amount of hot water in the hot water storage tank 8 is set to the maximum hot water storage temperature, the amount of hot water in the hot water storage tank 8 is subtracted during the midnight time zone. The amount of heat that needs to be boiled The amount of heat that needs to be boiled is calculated.
　次に、第１モードでの定格加熱能力による沸き上げ運転と、第２モードでの高加熱能力による沸き上げ運転とで、深夜時間帯のうちに沸き上げが完了するように、定格加熱能力での沸き上げである第１時間Ｈ１と高加熱能力での沸き上げ時間である第２時間Ｈ２とが設定される。より具体的には、例えば、低加熱能力の値をａ１、高加熱能力の値をａ２、深夜時間帯の長さをＨ０とすると、第１時間Ｈ１と第２時間Ｈ２とは、次式の関係を満たす用に設定される。
　　ａ１×Ｈ１＋ａ２×Ｈ２＝必要沸上熱量
　　Ｈ１＋Ｈ２＝Ｈ０ Next, in the boiling operation with the rated heating capacity in the first mode and the boiling operation with the high heating capacity in the second mode, the rated heating capacity is used so that the boiling is completed in the midnight time zone. The first time H1 which is the boiling time and the second time H2 which is the boiling time at a high heating capacity are set. More specifically, for example, assuming that the value of the low heating capacity is a1, the value of the high heating capacity is a2, and the length of the midnight time zone is H0, the first time H1 and the second time H2 are expressed by the following equations. Set to satisfy the relationship.
a1 x H1 + a2 x H2 = required boiling heat amount H1 + H2 = H0
　第２モードでの沸き上げを行う場合、制御装置３６は、深夜時間帯の開始時刻から第１時間Ｈ１の間、定格加熱能力での沸き上げ運転を行い、第１時間Ｈ１が経過した時刻に、ＨＰユニット７の加熱能力を定格加熱能力から高加熱能力に切り替えて、沸き上げ運転を続ける。制御装置３６は、ＨＰユニット７に流入する湯水の温度が、最高貯湯温度に達した段階で、沸き上げ運転を終了とする。これにより昼間時間帯の給湯使用量が多い場合に、十分な湯量を貯湯タンク８内に確保することができる。なお、上記のように算出される第２時間Ｈ２がゼロ以下である場合、深夜時間帯のうちに定格加熱能力で全量沸き上げを完了できることが予想されるため、加熱能力の切り替えは行われない。 When boiling in the second mode, the control device 36 performs the boiling operation at the rated heating capacity during the first hour H1 from the start time of the midnight time zone, and at the time when the first hour H1 elapses. , The heating capacity of the HP unit 7 is switched from the rated heating capacity to the high heating capacity, and the boiling operation is continued. The control device 36 ends the boiling operation when the temperature of the hot water flowing into the HP unit 7 reaches the maximum hot water storage temperature. As a result, when the amount of hot water supplied during the daytime is large, a sufficient amount of hot water can be secured in the hot water storage tank 8. If the second time H2 calculated as described above is zero or less, it is expected that the entire amount of boiling can be completed at the rated heating capacity during the midnight time zone, so the heating capacity is not switched. ..
　以上説明したように、本実施の形態に係る貯湯式給湯機３５によれば、通常時には、深夜時間帯に全量沸き上げを完了できる加熱能力よりも低い定格加熱能力での沸き上げが行われる。これにより、貯湯式給湯機３５のエネルギー効率を高くすることができる、また、全量沸き上げが必要な場合には、熱量の確保に必要な最低限の時間だけ、高加熱能力に切り替えられる。これにより昼間時間帯の湯量不足の発生を抑えることができる。 As described above, according to the hot water storage type water heater 35 according to the present embodiment, in normal times, boiling is performed with a rated heating capacity lower than the heating capacity capable of completing boiling in the middle of the night. As a result, the energy efficiency of the hot water storage type water heater 35 can be increased, and when it is necessary to boil the entire amount, the heating capacity can be switched to the high heating capacity for the minimum time required to secure the amount of heat. As a result, it is possible to suppress the occurrence of insufficient hot water during the daytime.
　なお本実施の形態において、定格加熱能力は、少なくともＨＰユニット７の最大加熱能力より低く、かつ高加熱能力よりも低い能力である。また、定格加熱能力は、少なくとも第１モードの低目標温度での沸き上げを深夜時間帯のうちに完了できる能力以上の能力に設定される。深夜時間帯を利用して低目標温度への湯の沸き上げを完了できる構成とすることで、貯湯式給湯機３５の運転コストを低減させることができるとともに、夜間蓄熱式機器として認められる。なお定格加熱能力を低くしすぎた場合、ＣＯＰは低下する場合がある。従って、定格加熱能力は、ＣＯＰが最も良くなる能力に設定する構成としてもよい。 In the present embodiment, the rated heating capacity is at least lower than the maximum heating capacity of the HP unit 7 and lower than the high heating capacity. Further, the rated heating capacity is set to at least the capacity that can complete the boiling at the low target temperature of the first mode within the midnight time zone. The operating cost of the hot water storage type water heater 35 can be reduced and it is recognized as a nighttime heat storage type device by configuring the boiling water to a low target temperature by using the midnight time zone. If the rated heating capacity is set too low, the COP may decrease. Therefore, the rated heating capacity may be set to the capacity at which the COP is the best.
　また、本実施の形態では、第１モードでの沸き上げを行う場合、ＨＰユニット７の加熱能力は定格加熱能力とする場合について説明した。これによりＣＯＰを向上させることができる。しかしこれに限られず、例えば、定格加熱能力が低く、第１モードでの沸き上げであっても加熱能力の不足が予想されるような場合には、第２モードの場合と同様に、途中で高加熱能力に切り替える構成としてもよい。これによって、必要熱量を確実に確保することができる。 Further, in the present embodiment, the case where the heating capacity of the HP unit 7 is the rated heating capacity when boiling in the first mode has been described. Thereby, COP can be improved. However, the present invention is not limited to this, and for example, when the rated heating capacity is low and the heating capacity is expected to be insufficient even when boiling in the first mode, as in the case of the second mode, in the middle of the process. It may be configured to switch to a high heating capacity. As a result, the required amount of heat can be reliably secured.
　また、本実施の形態に係る貯湯式給湯機３５は、ユーザーがリモコン装置４４により、加熱能力を定格加熱能力に固定する設定をできる構成を有するものであってもよい。定格加熱能力に固定する設定がされている間、制御装置３６は、深夜時間帯に全量沸き上げを行う場合でも高加熱能力への変更を行わず、定格加熱能力のまま、目標貯湯温度を低温目標温度として沸き上げを行う。例えば、ユーザーがＣＯＰを重視するような場合にユーザーの設定が優先され、貯湯式給湯機３５のユーザーの使用感を向上させることができる。 Further, the hot water storage type water heater 35 according to the present embodiment may have a configuration in which the user can set the heating capacity to be fixed to the rated heating capacity by the remote control device 44. While the control device 36 is set to be fixed at the rated heating capacity, the control device 36 does not change to the high heating capacity even when the entire amount is boiled at midnight, and the target hot water storage temperature is lowered while maintaining the rated heating capacity. Boil as the target temperature. For example, when the user attaches great importance to COP, the user's setting is prioritized, and the usability of the user of the hot water storage type water heater 35 can be improved.
　また、本実施の形態に係る貯湯式給湯機３５は、ユーザーがリモコン装置により、加熱能力を高加熱能力に固定する設定をできる構成を有するものであってもよい。高加熱能力に固定する設定がされている間、制御装置３６は、深夜時間帯に第１モードで沸き上げを実行する場合にも、目標貯湯温度を最高貯湯温度として高加熱能力で沸き上げ運転を行う。例えば、ユーザーが湯量不足を防止すること重視するような場合に、ユーザーの設定を優先することができ、貯湯式給湯機３５のユーザーの使用感を向上させることができる。 Further, the hot water storage type water heater 35 according to the present embodiment may have a configuration in which the user can set the heating capacity to be fixed to a high heating capacity by a remote control device. While the control device 36 is set to be fixed to a high heating capacity, the control device 36 is operated with a high heating capacity with the target hot water storage temperature as the maximum hot water storage temperature even when the boiling is executed in the first mode at midnight. I do. For example, when the user attaches great importance to preventing the shortage of hot water, the user's setting can be prioritized, and the usability of the user of the hot water storage type water heater 35 can be improved.
　また、本実施の形態に係る貯湯式給湯機３５は、ユーザーがリモコン装置４４により、深夜時間帯の沸き上げ量を全量とするように設定できる構成を有するものであってもよい。この設定がされている場合、深夜時間帯の沸き上げ運転は第２モードとされ、全量沸き上げが実行される。この場合にも、必要沸上熱量に対し加熱能力が不足する場合には、高加熱能力での沸き上げ運転の時間である第２時間Ｈ２が、上述のように算出され、深夜時間帯終了時刻の第２時間Ｈ２前の時点で、ＨＰユニット７が高加熱能力に切り替えられ沸き上げが行われる。これにより、ユーザーが所望する貯湯量を確保することができる。 Further, the hot water storage type water heater 35 according to the present embodiment may have a configuration in which the user can set the total amount of boiling in the midnight time zone by the remote control device 44. When this setting is made, the boiling operation in the midnight time zone is set to the second mode, and the total amount of boiling is executed. In this case as well, if the heating capacity is insufficient for the required heating capacity, the second time H2, which is the time for the boiling operation with the high heating capacity, is calculated as described above, and the end time of the midnight time zone is calculated. At the time before the second hour H2, the HP unit 7 is switched to a high heating capacity and boiling is performed. As a result, the amount of hot water stored by the user can be secured.
　また、本実施の形態に係る貯湯式給湯機３５は、ユーザーがリモコン装置４４により、全量沸き上げの開始を指示できる構成を有するものであってもよい。この場合、リモコン装置４４に、全量沸き上げを行う「満タン」のボタンを備え、このボタンを押すことにより、全量沸き上げの開始を指示できる構成としてもよい。リモコン装置４４が「満タン」の指示を受け付けた場合、制御装置３６は、直ちにＨＰユニット７の加熱能力を高加熱能力に切り替えて、第２モードでの運転を開始する。これにより、ユーザーの指示に対応して、早く沸き上げることを優先することができる。 Further, the hot water storage type water heater 35 according to the present embodiment may have a configuration in which the user can instruct the start of boiling the whole amount by the remote control device 44. In this case, the remote controller device 44 may be provided with a "full tank" button for boiling the entire amount, and by pressing this button, the start of boiling the entire amount may be instructed. When the remote control device 44 receives the instruction of "full tank", the control device 36 immediately switches the heating capacity of the HP unit 7 to the high heating capacity and starts the operation in the second mode. As a result, it is possible to give priority to boiling quickly in response to the user's instruction.
　本実施の形態では、深夜時間帯に全量沸き上げを行う場合であって、定格加熱能力では加熱能力が不足することが予想される場合には、まず第１時間Ｈ１の間、定格加熱能力での沸き上げを行ったあとで、第２時間Ｈ２だけ高加熱能力での沸き上げを行う場合について説明した。深夜時間帯の開始時点は他機器の電力利用も多いと想定される。従って、深夜時間帯の開始時刻から第１時間Ｈ１の間は、消費電力の低い定格加熱能力での沸き上げ運転を実施することで、消費電力のピークを抑制することができる。 In the present embodiment, when the whole amount is boiled in the midnight time zone and the heating capacity is expected to be insufficient with the rated heating capacity, first, during the first hour H1, the rated heating capacity is used. After the boiling of the above, the case where the boiling is performed with a high heating capacity for H2 for the second hour has been described. At the start of the midnight time zone, it is expected that there will be a lot of power usage by other devices. Therefore, from the start time of the midnight time zone to the first hour H1, the peak power consumption can be suppressed by carrying out the boiling operation with the rated heating capacity having low power consumption.
　但し、本実施の形態に係る貯湯式給湯機３５は、定格加熱能力での運転を先に行う構成に限定されない。全量沸き上げを行う場合に、深夜時間帯の開始から、上述の第２時間Ｈ２の間、高加熱能力で沸き上げを行ったあと、定格加熱能力に切り替えて沸き上げ運転を継続する構成としてもよい。深夜時間帯の開始時点において高加熱能力で沸き上げを開始することで、途中で湯を利用され、貯湯タンク８の残湯量が減少した場合に対応することができる。即ち、高加熱能力での沸き上げ中に、給湯による使用があった場合には、給湯使用後にも必要沸上熱量が確保されるように、高加熱能力での沸き上げの運転時間を延長すればよい。また、定格加熱能力に切り替え後に給湯による使用があった場合には、再び、高加熱能力に切り替えることで、必要熱量を確保することができる。 However, the hot water storage type water heater 35 according to the present embodiment is not limited to the configuration in which the operation at the rated heating capacity is performed first. In the case of boiling the whole amount, it is possible to continue the boiling operation by switching to the rated heating capacity after boiling with a high heating capacity during the above-mentioned second hour H2 from the start of the midnight time zone. good. By starting boiling with a high heating capacity at the start of the midnight time zone, it is possible to cope with a case where hot water is used in the middle and the amount of remaining hot water in the hot water storage tank 8 is reduced. That is, if hot water is used during boiling with a high heating capacity, the operating time for boiling with a high heating capacity should be extended so that the required amount of heating heat is secured even after the hot water is used. Just do it. In addition, if hot water is used after switching to the rated heating capacity, the required amount of heat can be secured by switching to the high heating capacity again.
　更に、本実施の形態に係る貯湯式給湯機３５は、ユーザーがリモコン装置４４により、定格加熱能力での沸き上げ運転を先に行うか、高加熱能力での沸き上げ運転を先に行うかを設定できる構成を有するものとしてもよい。この場合、制御装置３６は、全量沸き上げを行う場合には、ユーザーの選択に従った順序で加熱能力を切り替えるように構成される。 Further, in the hot water storage type water heater 35 according to the present embodiment, the user determines whether the boiling operation at the rated heating capacity is performed first or the boiling operation at the high heating capacity is performed first by the remote controller device 44. It may have a configuration that can be set. In this case, the control device 36 is configured to switch the heating capacity in an order according to the user's selection when the whole amount is boiled.
　　１　圧縮機、　　３　水冷媒熱交換器、　　４　膨張弁、　　５　冷媒配管、　　６　空気熱交換器、　　７　ＨＰユニット、　　８　貯湯タンク、　　８ａ　水導入口、　　８ｂ　水導出口、　　８ｃ　温水導入口、　　８ｄ　温水導入出口、　　９ａ　第１給水配管、　　９ｂ　第２給水配管、　　９ｃ　第３給水配管、　　１０　水導出口配管、　　１１　三方弁、　　１２　熱源ポンプ、　　１３　送湯配管、　　１４　ＨＰ往き配管、　　１５　ＨＰ戻り配管、　　１６　第１バイパス配管、　　１７　第２バイパス配管、　　１８　四方弁、　　２０　ふろ用熱交換器、　　２０ａ　温水導入配管、　　２０ｂ　温水導出配管、　　２１　給湯配管、　　２２　給湯用混合弁、　　２３　ふろ用混合弁、　　２４　第１給湯配管、　　２５　第２給湯配管、　　２６　ふろ用電磁弁、　　２７　ふろ往き配管、　　２８　ふろ戻り配管、　　２９　ふろ循環ポンプ、　　３０　浴槽、　　３１　減圧弁、　　３３　タンクユニット、　　３４　給湯栓、　　３５　貯湯式給湯機、　　３６　制御装置、　　４２，４３　貯湯温度センサ、　　４４　リモコン装置、　　４５　ふろ用流量センサ 1 compressor, 3 water refrigerant heat exchanger, 4 expansion valve, 5 refrigerant piping, 6 air heat exchanger, 7 HP unit, 8 hot water storage tank, 8a water inlet, 8b water outlet, 8c hot water inlet, 8d hot water Introductory outlet, 9a 1st water supply pipe, 9b 2nd water supply pipe, 9c 3rd water supply pipe, 10 water outlet pipe, 11 three-way valve, 12 heat source pump, 13 hot water supply pipe, 14 HP outbound pipe, 15 HP return pipe, 16 1st bypass pipe, 17 2nd bypass pipe, 18 4-way valve, 20 bath heat exchanger, 20a hot water introduction pipe, 20b hot water outlet pipe, 21 hot water supply pipe, 22 hot water supply mixing valve, 23 bath mixing valve, 24 1st hot water supply pipe, 25 2nd hot water supply pipe, 26 electromagnetic valve for bath, 27 bath going pipe, 28 bath return pipe, 29 bath circulation pump, 30 bathtub, 31 pressure reducing valve, 33 tank unit, 34 hot water tap, 35 hot water storage type Water heater, 36 control device, 42, 43 hot water storage temperature sensor, 44 remote control device, 45 bath flow sensor

Claims (10)

  1. 　水を加熱する加熱能力を変更可能に構成された加熱手段と、
    　前記加熱手段により加熱された水を貯湯することができる貯湯タンクと、
    　前記加熱手段の加熱能力の切り替えを制御すると共に、前記加熱手段により加熱した水を前記貯湯タンクに貯湯する沸き上げ運転を制御するように構成された制御装置と、
    　を備え、
    　前記加熱手段の定格加熱能力は、１日２４時間のうちで、電気料金単価が他の時間帯と比べて低い時間帯である低料金時間帯の間に、前記貯湯タンクの水全量を設定可能な最高貯湯温度に沸き上げる全量沸き上げを完了できる加熱能力よりも、低い能力であることを特徴とする貯湯式給湯機。     A heating means configured to change the heating capacity to heat water,
    A hot water storage tank capable of storing water heated by the heating means, and a hot water storage tank.
    A control device configured to control switching of the heating capacity of the heating means and to control a boiling operation of storing water heated by the heating means in the hot water storage tank.
    With
    The rated heating capacity of the heating means can set the total amount of water in the hot water storage tank during a low charge time zone in which the unit price of electricity is lower than other time zones within 24 hours a day. A hot water storage type water heater characterized by having a lower capacity than the heating capacity that can complete boiling of the entire amount of water that is boiled to the maximum hot water storage temperature.
  2. 　前記定格加熱能力は、エネルギー効率が最も良くなる加熱能力であることを特徴とする請求項１に記載の貯湯式給湯機。 The hot water storage type water heater according to claim 1, wherein the rated heating capacity is the heating capacity that maximizes energy efficiency.
  3. 　前記加熱手段は、前記定格加熱能力よりも高い高加熱能力で運転可能であり、
    　前記制御装置は、
    　前記低料金時間帯のうちに、前記全量沸き上げを行う場合、
    　前記定格加熱能力での沸き上げ運転では前記低料金時間帯の終了時刻までに前記全量沸き上げが完了しないと予想される場合には、前記低料金時間帯の終了時刻に前記全量沸き上げが終了するのに必要な時間だけ前記高加熱能力での前記沸き上げ運転を行う、
    　ように構成されていることを特徴とする請求項１又は２に記載の貯湯式給湯機。     The heating means can be operated with a high heating capacity higher than the rated heating capacity.
    The control device is
    When the whole amount is boiled during the low charge time zone
    If it is expected that the total amount of boiling will not be completed by the end time of the low charge time zone in the boiling operation at the rated heating capacity, the total amount of boiling will end at the end time of the low charge time zone. The boiling operation with the high heating capacity is performed for the time required for the operation.
    The hot water storage type water heater according to claim 1 or 2, wherein the water heater is configured as described above.
  4. 　前記制御装置は、
    　前記沸き上げ運転時の目標貯湯温度を前記最高貯湯温度より低い目標温度とする第１モードと、
    　前記沸き上げ運転時の目標貯湯温度を前記最高貯湯温度として前記全量沸き上げを行う第２モードと、を備え、
    　前記第１モードで沸き上げを行う場合には、前記加熱手段の加熱能力を、前記定格加熱能力として沸き上げ運転を行うように構成されている、
    　ことを特徴とする請求項３に記載の貯湯式給湯機。     The control device is
    The first mode in which the target hot water storage temperature during the boiling operation is set to a target temperature lower than the maximum hot water storage temperature, and
    A second mode in which the entire amount is boiled with the target hot water storage temperature during the boiling operation as the maximum hot water storage temperature is provided.
    When boiling is performed in the first mode, the heating capacity of the heating means is used as the rated heating capacity to perform the boiling operation.
    The hot water storage type water heater according to claim 3.
  5. 　前記加熱手段の加熱能力を前記定格加熱能力に固定するユーザーからの指令を受け付ける操作部を、更に備え、
    　前記制御装置は、前記操作部が、前記定格加熱能力に固定する指令を受け付けた場合、前記沸き上げ運転における前記加熱手段の加熱能力を、前記定格加熱能力とするように構成されている、
    　ことを特徴とする請求項３又は４に記載の貯湯式給湯機。     An operation unit that receives a command from a user to fix the heating capacity of the heating means to the rated heating capacity is further provided.
    The control device is configured such that when the operating unit receives a command to fix the rated heating capacity, the heating capacity of the heating means in the boiling operation is set to the rated heating capacity.
    The hot water storage type water heater according to claim 3 or 4.
  6. 　前記加熱手段の加熱能力を前記高加熱能力に固定するユーザーからの指令を受け付ける操作部を、更に備え、
    　前記制御装置は、前記操作部が、前記高加熱能力に固定する指令を受け付けた場合、前記沸き上げ運転における前記加熱手段の加熱能力を、前記高加熱能力とするように構成されている、
    　ことを特徴とする請求項３から５のいずれか１項に記載の貯湯式給湯機。     An operation unit that receives a command from a user to fix the heating capacity of the heating means to the high heating capacity is further provided.
    The control device is configured so that when the operating unit receives a command to fix to the high heating capacity, the heating capacity of the heating means in the boiling operation is set to the high heating capacity.
    The hot water storage type water heater according to any one of claims 3 to 5, characterized in that.
  7. 　前記全量沸き上げを開始するユーザーからの指令を受け付ける操作部を、更に備え、
    　前記制御装置は、前記操作部が前記全量沸き上げを開始する指令を受け付けた場合、前記高加熱能力で沸き上げ運転を実行するように構成されている、
    　ことを特徴とする請求項３から６のいずれか１項に記載の貯湯式給湯機。     Further equipped with an operation unit that receives a command from the user to start boiling the whole amount.
    The control device is configured to execute the boiling operation with the high heating capacity when the operating unit receives a command to start boiling the entire amount.
    The hot water storage type water heater according to any one of claims 3 to 6, characterized in that.
  8. 　前記制御装置は、前記低料金時間帯に前記全量沸き上げを行う場合、
    　前記定格加熱能力で沸き上げ運転を行った後、前記高加熱能力に切り替えるように構成されている、
    　ことを特徴とする請求項３から７のいずれか１項に記載の貯湯式給湯機。     When the control device performs the whole amount boiling during the low charge time zone,
    It is configured to switch to the high heating capacity after performing the boiling operation at the rated heating capacity.
    The hot water storage type water heater according to any one of claims 3 to 7, wherein the water heater is characterized by the above.
  9. 　前記制御装置は、前記低料金時間帯に前記全量沸き上げる場合、
    　前記高加熱能力で沸き上げ運転を行った後、前記定格加熱能力に切り替えるように構成されている、
    　ことを特徴とする請求項３から７のいずれか１項に記載の貯湯式給湯機。     When the control device boils the whole amount during the low charge time zone,
    It is configured to switch to the rated heating capacity after performing the boiling operation with the high heating capacity.
    The hot water storage type water heater according to any one of claims 3 to 7, wherein the water heater is characterized by the above.
  10. 　前記貯湯式給湯機の運転に関するユーザーからの指令を受け付けることができる操作部を、更に備え、
    　前記操作部は、前記全量沸き上げの途中で前記加熱手段の加熱能力を前記定格加熱能力と前記高加熱能力との間で切り替える場合に、前記定格加熱能力での沸き上げ運転を先に行うか、前記高加熱能力での沸き上げ運転を先に行うかの、ユーザーによる選択を受け付けることができるように構成され、
    　前記制御装置は、前記操作部が受け付けたユーザーの選択に従って、前記加熱能力を切り替えるように構成されている、
    　ことを特徴とする請求項３から７のいずれか１項に記載の貯湯式給湯機。     It is further equipped with an operation unit that can receive commands from the user regarding the operation of the hot water storage type water heater.
    When the operating unit switches the heating capacity of the heating means between the rated heating capacity and the high heating capacity in the middle of boiling the whole amount, does the operating unit first perform the boiling operation at the rated heating capacity? , It is configured to accept the user's choice as to whether to perform the boiling operation with the high heating capacity first.
    The control device is configured to switch the heating capacity according to the user's selection accepted by the operation unit.
    The hot water storage type water heater according to any one of claims 3 to 7, wherein the water heater is characterized by the above.
PCT/JP2020/015345 2020-04-03 2020-04-03 Hot water storage-type water heater WO2021199433A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007093113A (en) * 2005-09-29 2007-04-12 Sanyo Electric Co Ltd Heat pump type water heater
JP2007132594A (en) * 2005-11-10 2007-05-31 Corona Corp Reservoir type hot water supply device
JP2009047334A (en) * 2007-08-17 2009-03-05 Corona Corp Heat pump type water heater
WO2009057303A1 (en) * 2007-11-02 2009-05-07 Panasonic Corporation Hot water supply system
JP2010127569A (en) * 2008-11-28 2010-06-10 Daikin Ind Ltd Storage water heater

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007093113A (en) * 2005-09-29 2007-04-12 Sanyo Electric Co Ltd Heat pump type water heater
JP2007132594A (en) * 2005-11-10 2007-05-31 Corona Corp Reservoir type hot water supply device
JP2009047334A (en) * 2007-08-17 2009-03-05 Corona Corp Heat pump type water heater
WO2009057303A1 (en) * 2007-11-02 2009-05-07 Panasonic Corporation Hot water supply system
JP2010127569A (en) * 2008-11-28 2010-06-10 Daikin Ind Ltd Storage water heater

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