WO2023074478A1 - Electric water heater - Google Patents

Electric water heater Download PDF

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Publication number
WO2023074478A1
WO2023074478A1 PCT/JP2022/038843 JP2022038843W WO2023074478A1 WO 2023074478 A1 WO2023074478 A1 WO 2023074478A1 JP 2022038843 W JP2022038843 W JP 2022038843W WO 2023074478 A1 WO2023074478 A1 WO 2023074478A1
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WO
WIPO (PCT)
Prior art keywords
temperature
hot water
operation mode
heating rate
hot
Prior art date
Application number
PCT/JP2022/038843
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French (fr)
Japanese (ja)
Inventor
将広 林
良司 松村
和也 下坊
直樹 森野
公亮 荒巻
Original Assignee
パナソニックＩｐマネジメント株式会社
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Publication of WO2023074478A1 publication Critical patent/WO2023074478A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • 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
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/176—Improving or maintaining comfort of users
    • F24H15/18—Preventing sudden or unintentional change of fluid temperature
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric heaters
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature

Definitions

  • the present invention relates to an electric water heater having a set operation mode.
  • Patent Document 1 discloses an electric water heater that has a set operation mode in which hot water on the high temperature side and hot water on the low temperature side can be repeatedly discharged.
  • the present invention provides an electric hot water bath in which the hot water temperature in the set operation mode is moderated so that the user does not feel uncomfortable due to sudden temperature changes, and the hot water temperature can be changed quickly in response to the user's operation in the normal operation mode.
  • the purpose is to provide a boiler.
  • the electric water heater of the present invention is an electric water heater that heats water supplied from a water inlet portion 1 with an electric heater 2 and discharges the heated hot water from a hot water outlet portion 3, wherein the temperature
  • the first hot water in the set operation mode has a normal operation mode in which the temperature of the hot water to be discharged is changed by operating the setting unit 10a, and a set operation mode in which the temperature of the hot water to be discharged is determined according to a preset set temperature. set operation arrival times Ty1, Ty2, and Ty3 from warm to second hot water temperature, and normal operation arrival time Tx1 from the first hot water temperature to the second hot water temperature in the normal operation mode; It is characterized by being longer than Tx2 and Tx3.
  • a high temperature side set temperature and a low temperature side set temperature are set as the set temperature, and the high temperature side set temperature is set.
  • the high temperature side set temperature is set to the first hot water temperature
  • the low temperature side set temperature is set to the above It is characterized in that it is set to the second hot water temperature.
  • a high temperature side set temperature and a low temperature side set temperature are set as the set temperature, and the high temperature side set temperature is set.
  • the low temperature side set temperature is set to the first hot water temperature
  • the high temperature side set temperature is set to the above It is characterized in that it is set to the second hot water temperature.
  • the present invention according to claim 4 is the electric water heater according to claim 1 or claim 2, wherein the set operation mode is a cool-down operation in which the temperature of the hot water being used in the normal operation mode is lowered by a predetermined temperature. wherein the hot water temperature during use is set to the first hot water temperature, and the cool-down target hot water temperature obtained by lowering the predetermined temperature from the hot water temperature during use is set to the second hot water temperature. and
  • the present invention according to claim 5 is the electric water heater according to claim 1 or claim 3, wherein the set operation mode is a warm-up operation in which the temperature of the hot water being used in the normal operation mode is raised by a predetermined temperature.
  • the hot water temperature during use is set to the first hot water temperature
  • the warm-up target hot water temperature obtained by increasing the predetermined temperature from the hot water temperature during use is set to the second hot water temperature.
  • the present invention according to claim 6 is the electric water heater according to any one of claims 1 to 5, wherein a temperature detection unit 5 for detecting the temperature of the hot water heated by the electric heater 2, and a control unit 12 for controlling the electric heater 2.
  • the detected temperature detected by the temperature detection unit 5 and the target set by the operation in the temperature setting unit 10a or the set temperature The heating rate of the electric heater 2 is changed according to the temperature difference from the temperature, and the heating rate is at least a normal heating rate, a high heating rate faster than the normal heating rate, and a low heating rate slower than the normal heating rate.
  • a heating rate is set, and in the normal operation mode, the normal heating rate is set when the temperature difference is equal to or less than a predetermined value, and the high speed heating rate is set when the temperature difference exceeds the predetermined value, and in the set operation mode, and the low heating rate.
  • the change in hot water temperature in the set operation mode is moderated, and the user feels a sudden temperature change.
  • the hot water temperature can be quickly changed according to the user's operation in the normal operation mode without giving discomfort due to the change.
  • FIG. 1 is a schematic configuration diagram of an electric water heater according to an embodiment of the present invention
  • FIG. Explanatory diagram showing the operation state when the set operation mode of the same electric water heater is set to hot and cold operation mode
  • the electric water heater according to the first embodiment of the present invention has a normal operation mode in which the temperature of hot water to be discharged is changed by operating the temperature setting unit, and a setting in which the temperature of hot water to be discharged is determined by a preset temperature. and an operation mode, wherein the set operation reaching time from the first hot water temperature to the second hot water temperature in the set operation mode is set to the normal operating time from the first hot water temperature to the second hot water temperature in the normal operation mode. It is longer than the arrival time during operation.
  • the change in hot water temperature in the set operation mode becomes gradual, and the user feels a sudden change.
  • the hot water temperature can be changed quickly according to the user's operation without causing discomfort due to sudden temperature changes.
  • a high temperature side set temperature and a low temperature side set temperature are set as the set temperature. It has a hot and cold operation mode that changes the temperature of discharged hot water by repeating the temperature and the set temperature on the low temperature side. It is.
  • the temperature change from the high temperature side set temperature to the low temperature side set temperature can be moderated.
  • a high temperature side set temperature and a low temperature side set temperature are set as the set temperature, and the high temperature side set temperature is set.
  • the set temperature on the low temperature side is set as the first hot water temperature
  • the set temperature on the high temperature side is set as the second hot water temperature. It is.
  • the temperature change from the low temperature side set temperature to the high temperature side set temperature can be moderated.
  • the set operation mode is a cool-down operation mode in which a predetermined temperature is lowered from the hot water temperature in use in the normal operation mode.
  • the hot water temperature during use is set as the first hot water temperature
  • the cool-down target hot water temperature that is a predetermined temperature lower than the hot water temperature during use is set as the second hot water temperature. According to the present embodiment, it is possible to moderate the temperature drop in the cool-down operation mode.
  • the set operation mode is a warm-up operation mode in which the temperature of the hot water being used in the normal operation mode is raised to a predetermined temperature.
  • the hot water temperature during use is set as the first hot water temperature
  • the warm-up target hot water temperature raised by a predetermined temperature from the hot water temperature during use is set as the second hot water temperature.
  • the temperature rise can be moderated in the warm-up operation mode.
  • a temperature detecting section for detecting the temperature of hot water heated by the electric heater and a controller for controlling the electric heater are provided.
  • the control unit adjusts the heating rate of the electric heater according to the temperature difference between the detected temperature detected by the temperature detection unit and the target temperature set by the operation or set temperature in the temperature setting unit. is set as the heating rate, and at least the normal heating rate, the high-speed heating rate that is faster than the normal heating rate, and the low-speed heating rate that is slower than the normal heating rate are set.
  • the heating rate is normal, and when the temperature difference exceeds a predetermined value, the heating rate is high, and in the set operation mode, the heating rate is low.
  • the change in hot water temperature in the set operation mode is gradual, and the user does not feel uncomfortable due to a sudden change in temperature. can be changed.
  • FIG. 1 is a schematic configuration diagram of an electric water heater according to this embodiment.
  • the electric water heater according to this embodiment heats water supplied from a water inlet portion 1 with an electric heater 2 and discharges the heated hot water from a hot water outlet portion 3 .
  • a shower hose having, for example, a shower head at its end is connected to the hot water outlet 3 .
  • Water supplied from the water inlet 1 is led to the tank 4 and heated by the electric heater 2 inside the tank 4 .
  • the temperature detection unit 5 is provided in the hot water supply unit 3 and detects the temperature of hot water heated by the electric heater 2 .
  • the electric water heater comprises a first control board 7 , a second control board 8 and heater control elements 9 .
  • the first control board 7 has a transformer, converts AC power into DC power, and supplies power to the second control board 8 and the heater control element 9 .
  • the second control board 8 includes an operation section 10 , a display section 11 and a control section 12 .
  • the operation unit 10 has a temperature setting unit 10a and a mode operation unit 10b. The user changes the temperature of the hot water to be discharged by operating the temperature setting section 10a. Further, the user can set the set operation mode and issue an operation instruction by operating the mode operation unit 10b.
  • the display unit 11 displays hot water temperature and set operation mode.
  • the controller 12 controls the electric heater 2 via the heater control element 9 .
  • the electric water heater has a normal operation mode in which the temperature of hot water to be discharged is changed by operating the temperature setting unit 10a, and a set operation mode in which the temperature of hot water to be discharged is determined according to a preset temperature. Then, the set operation arrival time from the first hot water temperature to the second hot water temperature in the set operation mode is greater than the normal operation arrival time from the first hot water temperature to the second hot water temperature in the normal operation mode. is also longer.
  • the control unit 12 constantly takes in the detected temperature from the temperature detection unit 5 and performs PID feedback control of the electric power for heating up to the target temperature.
  • the control unit 12 changes the heating rate of the electric heater 2 according to the temperature difference between the detected temperature detected by the temperature detection unit 5 and the target temperature set by the operation or set temperature in the temperature setting unit 10a. .
  • the heating rate is adjusted by applying a constant gain to the temperature difference (deviation). A high gain results in a fast heating rate, and a low gain results in a slow heating rate.
  • by changing the gain at least a normal heating rate, a high-speed heating rate faster than the normal heating rate, and a low-speed heating rate slower than the normal heating rate are set as the heating rate.
  • the normal heating rate is set when the deviation is equal to or less than a predetermined value, and the high speed heating rate is set when the deviation exceeds the predetermined value.
  • a normal heating rate or a high heating rate is set in the normal operation mode, and a low heating rate is set in the set operation mode, so that the set operation arrival time can be made longer than the normal operation arrival time.
  • the normal heating rate is set when the deviation is less than or equal to a predetermined value, and the high speed heating rate is set when the deviation exceeds the predetermined value.
  • FIG. 2 is an explanatory diagram showing the operating state when the set operation mode is set to the warm/cold operation mode.
  • FIG. 2(a) shows hot water temperature change operation in the normal operation mode. As shown in FIG. 2(a), by operating the temperature setting unit 10a, the hot water temperature can be changed from 38.degree. C. to 36.degree. C. or from 36.degree.
  • FIG. 2(b) shows changes in hot water temperature when the hot water temperature shown in FIG. 2(a) is changed.
  • Tx1 indicates the time required for the water temperature to reach 36°C from 38°C during normal operation when the hot water temperature is changed from 38°C to 36°C. In this case, 38°C is the first hot water temperature and 36°C is the second hot water temperature.
  • Tx2 indicates the time required for the water temperature to reach 38°C from 36°C during normal operation when the hot water temperature is changed from 36°C to 38°C.
  • 36°C is the first hot water temperature
  • 38°C is the second hot water temperature.
  • FIG. 2(c) shows an instruction operation for the warm/cold operation mode as the set operation mode.
  • the high temperature side set temperature and the low temperature side set temperature are set to 38° C. and 36° C., respectively, and the high temperature side set temperature is set.
  • 38°C and 36°C which is the set temperature on the low temperature side
  • the temperature of the discharged hot water is changed.
  • the high temperature setting is set to the temperature of the hot water being used in the normal operation mode
  • the low temperature setting is 2°C lower than the high temperature setting. It is also possible to preset the temperature and the set temperature on the low temperature side. Also, the time at the high temperature setting temperature and the time at the low temperature setting temperature can be set in advance.
  • Ty1 indicates the set operation time until the hot water temperature reaches 36° C., which is the low temperature side set temperature, from 38° C., which is the high temperature side set temperature.
  • the high set temperature of 38° C. is the first hot water temperature
  • the low set temperature of 36° C. is the second hot water temperature.
  • Ty2 indicates the set operation time until the hot water temperature reaches 38° C., which is the high temperature side set temperature, from 36° C., which is the low temperature side set temperature.
  • the low set temperature of 36° C. is the first hot water temperature
  • the high set temperature of 38° C. is the second hot water temperature.
  • the set operation arrival time Ty1 is longer than the normal operation arrival time Tx1, and the set operation arrival time Ty2 is longer than the normal operation arrival time Tx2.
  • the set operation arrival time Ty1 longer than the normal operation arrival time Tx1
  • the temperature change from the high temperature set temperature to the low temperature set temperature can be moderated in the hot/cold operation mode.
  • the set operation arrival time Ty2 longer than the normal operation arrival time Tx2
  • the temperature change from the low temperature side set temperature to the high temperature side set temperature can be moderated in the hot/cold operation mode.
  • the change in hot water temperature in the hot/cold operation mode becomes gentle.
  • the temperature of the hot water can be quickly changed according to the user's operation in the normal operation mode without causing the user to feel uncomfortable due to the sudden temperature change.
  • FIG. 3 is an explanatory diagram showing an operation state when the set operation mode is the cool-down operation mode.
  • FIG. 3(a) shows hot water temperature changing operation in the normal operation mode. As shown in FIG. 3A, by operating the temperature setting unit 10a, the hot water temperature can be changed from 38.degree. C. to 36.degree.
  • FIG. 3(b) shows changes in hot water temperature when the hot water temperature shown in FIG. 3(a) is changed.
  • Tx1 indicates the time required for the water temperature to reach 36°C from 38°C during normal operation when the hot water temperature is changed from 38°C to 36°C. In this case, 38°C is the first hot water temperature and 36°C is the second hot water temperature.
  • FIG. 3(c) shows an instruction operation for the cool-down operation mode as the set operation mode.
  • the hot water temperature during use in the normal operation mode is lowered by a predetermined temperature.
  • FIG. 3(c) shows that the hot water temperature during use is 38° C. in the normal operation mode.
  • the predetermined temperature to be lowered in the cool-down operation mode is assumed to be 2°C. Therefore, since the hot water temperature during use is 38°C and the predetermined temperature is 2°C, the target hot water temperature for cooling down is 36°C.
  • FIG. 3(d) shows hot water temperature changes in the cool-down operation mode shown in FIG. 3(c).
  • Ty1 indicates the set operating time from 38° C., which is the hot water temperature in use, to 36° C., which is the cool-down target hot water temperature.
  • the hot water temperature during use of 38°C is the first hot water temperature
  • the cool-down target hot water temperature of 36°C is the second hot water temperature.
  • the set operation arrival time Ty1 is longer than the normal operation arrival time Tx1.
  • the temperature drop can be moderated in the cool-down operation mode.
  • the change in the hot water temperature in the cool-down operation mode becomes gentle, and the user feels a sudden change.
  • the hot water temperature can be changed quickly according to the user's operation without causing discomfort due to sudden temperature changes.
  • FIG. 4 is an explanatory diagram showing an operation state when the set operation mode is the warm-up operation mode.
  • FIG. 4(a) shows hot water temperature changing operation in the normal operation mode. As shown in FIG. 4A, by operating the temperature setting unit 10a, the hot water temperature can be changed from 38° C. to 40° C., for example.
  • FIG. 4(b) shows changes in hot water temperature when the hot water temperature shown in FIG. 4(a) is changed.
  • Tx3 indicates the time required for the water temperature to reach 40°C from 38°C during normal operation when the hot water temperature is changed from 38°C to 40°C. In this case, 38°C is the first hot water temperature, and 40°C is the second hot water temperature.
  • FIG. 4(c) shows an instruction operation for the warm-up operation mode as the set operation mode.
  • the hot water temperature during use in the normal operation mode is increased by a predetermined temperature.
  • FIG. 4(c) shows that the hot water temperature during use is 38° C. in the normal operation mode.
  • the predetermined temperature to be raised in the warm-up operation mode is assumed to be 2°C. Therefore, since the hot water temperature during use is 38°C and the predetermined temperature is 2°C, the warm-up target hot water temperature is 40°C.
  • FIG. 4(d) shows hot water temperature changes in the warm-up operation mode shown in FIG. 4(c).
  • Ty3 indicates the set operating time from 38° C., which is the hot water temperature in use, to 40° C., which is the warm-up target hot water temperature.
  • the first hot water temperature is 38° C., which is the hot water temperature during use
  • the second hot water temperature is 40° C., which is the warm-up target hot water temperature.
  • the set operation arrival time Ty3 is longer than the normal operation arrival time Tx3.
  • the temperature rise can be moderated in the warm-up operation mode.
  • the hot water temperature change in the warm-up operation mode becomes gradual, and the user feels a sudden change.
  • the hot water temperature can be changed quickly according to the user's operation without causing discomfort due to sudden temperature changes.
  • the present invention is particularly suitable for electric water heaters that can be used as showers.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

Provided is an electric water heater that heats water supplied from a water inlet portion (1) with an electric heater (2) and discharges the heated water from a hot-water outlet portion (3), the electric water heater having a normal operation mode in which the temperature of hot water to be discharged is changed by operating a temperature setting unit (10a), and a preset setting operation mode in which the temperature of hot water to be discharged is determined according to a preset temperature. The time (Ty1, Ty2, Ty3) required to reach a second hot-water temperature from a first hot-water temperature in the setting operation mode is longer than the time (Tx1, Tx2, Tx3) required to reach the second hot-water temperature from the first hot-water temperature in the normal operation mode. Thus, the hot-water temperature change in the setting operation mode is gradual so that a user does not feel discomfort due to a sudden temperature change, and in the normal operation mode, the hot-water temperature can be changed quickly in response to user operations.

Description

電気湯沸器electric water heater
　本発明は、設定運転モードを有する電気湯沸器に関するものである。 The present invention relates to an electric water heater having a set operation mode.
　特許文献１は、高温側温水と低温側温水とを繰り返して出湯できる設定運転モードを有する電気湯沸器を開示している。 Patent Document 1 discloses an electric water heater that has a set operation mode in which hot water on the high temperature side and hot water on the low temperature side can be repeatedly discharged.
特開２０１１－２０８８９８号公報JP 2011-208898 A
　しかし、高温側温水と低温側温水との温度変化が急激に起こることで、皮膚感覚が温度変化に追随できずに、使用者によっては不快に感じることがある。 However, due to the rapid temperature change between the hot water on the high temperature side and the hot water on the low temperature side, the skin sensation cannot follow the temperature change, and some users may feel uncomfortable.
　そこで本発明は、設定運転モードにおける湯温変化を緩やかにして使用者に急激な温度変化による不快感を与えず、通常運転モードでは、使用者の操作に応じて素早く湯温を変更できる電気湯沸器を提供することを目的とする。 Therefore, the present invention provides an electric hot water bath in which the hot water temperature in the set operation mode is moderated so that the user does not feel uncomfortable due to sudden temperature changes, and the hot water temperature can be changed quickly in response to the user's operation in the normal operation mode. The purpose is to provide a boiler.
　請求項１記載の本発明の電気湯沸器は、入水部１から供給される水を電気ヒータ２で加熱し、加熱された湯を出湯部３から吐出する電気湯沸器であって、温度設定部１０ａの操作によって吐出される湯温を変更する通常運転モードと、あらかじめ設定され設定温度によって吐出される前記湯温を決定する設定運転モードとを有し、前記設定運転モードにおける第１湯温から第２湯温に到達するまでの設定運転時到達時間Ｔｙ１、Ｔｙ２、Ｔｙ３を、前記通常運転モードにおける前記第１湯温から前記第２湯温に至るまでの通常運転時到達時間Ｔｘ１、Ｔｘ２、Ｔｘ３よりも長くしたことを特徴とする。
　請求項２記載の本発明は、請求項１に記載の電気湯沸器において、前記設定運転モードとして、前記設定温度には高温側設定温度と低温側設定温度とが設定され、前記高温側設定温度と前記低温側設定温度とを繰返すことで、吐出される前記湯温を変更する温冷運転モードを有し、前記高温側設定温度を前記第１湯温とし、前記低温側設定温度を前記第２湯温としたことを特徴とする。
　請求項３記載の本発明は、請求項１に記載の電気湯沸器において、前記設定運転モードとして、前記設定温度には高温側設定温度と低温側設定温度とが設定され、前記高温側設定温度と前記低温側設定温度とを繰返すことで、吐出される前記湯温を変更する温冷運転モードを有し、前記低温側設定温度を前記第１湯温とし、前記高温側設定温度を前記第２湯温としたことを特徴とする。
　請求項４記載の本発明は、請求項１または請求項２に記載の電気湯沸器において、前記設定運転モードとして、前記通常運転モードで使用中の前記湯温から所定温度低下させるクールダウン運転モードを有し、前記使用中の前記湯温を前記第１湯温とし、前記使用中の前記湯温から前記所定温度低下させたクールダウン目標湯温を前記第２湯温としたことを特徴とする。
　請求項５記載の本発明は、請求項１または請求項３に記載の電気湯沸器において、前記設定運転モードとして、前記通常運転モードで使用中の前記湯温から所定温度上昇させるウオームアップ運転モードを有し、前記使用中の前記湯温を前記第１湯温とし、前記使用中の前記湯温から前記所定温度上昇させたウオームアップ目標湯温を前記第２湯温としたことを特徴とする。
　請求項６記載の本発明は、請求項１から請求項５のいずれか１項に記載の電気湯沸器において、前記電気ヒータ２で加熱された前記湯温を検出する温度検出部５と、前記電気ヒータ２を制御する制御部１２とを備え、前記制御部１２では、前記温度検出部５で検出される検出温度と、前記温度設定部１０ａでの操作又は前記設定温度により設定された目標温度との温度差に応じて前記電気ヒータ２での加熱速度を変更し、前記加熱速度として、少なくとも、通常加熱速度と、前記通常加熱速度より速い高速加熱速度と、前記通常加熱速度より遅い低速加熱速度とが設定され、前記通常運転モードでは、前記温度差が所定値以下であれば前記通常加熱速度、前記温度差が前記所定値を超えるときは前記高速加熱速度とし、前記設定運転モードでは、前記低速加熱速度としたことを特徴とする。 The electric water heater of the present invention according to claim 1 is an electric water heater that heats water supplied from a water inlet portion 1 with an electric heater 2 and discharges the heated hot water from a hot water outlet portion 3, wherein the temperature The first hot water in the set operation mode has a normal operation mode in which the temperature of the hot water to be discharged is changed by operating the setting unit 10a, and a set operation mode in which the temperature of the hot water to be discharged is determined according to a preset set temperature. set operation arrival times Ty1, Ty2, and Ty3 from warm to second hot water temperature, and normal operation arrival time Tx1 from the first hot water temperature to the second hot water temperature in the normal operation mode; It is characterized by being longer than Tx2 and Tx3.
According to a second aspect of the present invention, in the electric water heater according to the first aspect, as the set operation mode, a high temperature side set temperature and a low temperature side set temperature are set as the set temperature, and the high temperature side set temperature is set. By repeating the temperature and the low temperature side set temperature, it has a hot and cold operation mode in which the hot water temperature to be discharged is changed, the high temperature side set temperature is set to the first hot water temperature, and the low temperature side set temperature is set to the above It is characterized in that it is set to the second hot water temperature.
According to a third aspect of the present invention, in the electric water heater according to the first aspect, as the set operation mode, a high temperature side set temperature and a low temperature side set temperature are set as the set temperature, and the high temperature side set temperature is set. By repeating the temperature and the low temperature side set temperature, it has a hot and cold operation mode in which the hot water temperature to be discharged is changed, the low temperature side set temperature is set to the first hot water temperature, and the high temperature side set temperature is set to the above It is characterized in that it is set to the second hot water temperature.
The present invention according to claim 4 is the electric water heater according to claim 1 or claim 2, wherein the set operation mode is a cool-down operation in which the temperature of the hot water being used in the normal operation mode is lowered by a predetermined temperature. wherein the hot water temperature during use is set to the first hot water temperature, and the cool-down target hot water temperature obtained by lowering the predetermined temperature from the hot water temperature during use is set to the second hot water temperature. and
The present invention according to claim 5 is the electric water heater according to claim 1 or claim 3, wherein the set operation mode is a warm-up operation in which the temperature of the hot water being used in the normal operation mode is raised by a predetermined temperature. The hot water temperature during use is set to the first hot water temperature, and the warm-up target hot water temperature obtained by increasing the predetermined temperature from the hot water temperature during use is set to the second hot water temperature. and
The present invention according to claim 6 is the electric water heater according to any one of claims 1 to 5, wherein a temperature detection unit 5 for detecting the temperature of the hot water heated by the electric heater 2, and a control unit 12 for controlling the electric heater 2. In the control unit 12, the detected temperature detected by the temperature detection unit 5 and the target set by the operation in the temperature setting unit 10a or the set temperature The heating rate of the electric heater 2 is changed according to the temperature difference from the temperature, and the heating rate is at least a normal heating rate, a high heating rate faster than the normal heating rate, and a low heating rate slower than the normal heating rate. A heating rate is set, and in the normal operation mode, the normal heating rate is set when the temperature difference is equal to or less than a predetermined value, and the high speed heating rate is set when the temperature difference exceeds the predetermined value, and in the set operation mode, and the low heating rate.
　本発明によれば、設定運転モードにおける設定運転時到達時間を通常運転モードにおける通常運転時到達時間よりも長くすることで、設定運転モードにおける湯温変化が緩やかになり、使用者に急激な温度変化による不快感を与えず、通常運転モードでは、使用者の操作に応じて素早く湯温を変更できる。 According to the present invention, by making the time to reach the set operation in the set operation mode longer than the time to reach the normal operation in the normal operation mode, the change in hot water temperature in the set operation mode is moderated, and the user feels a sudden temperature change. The hot water temperature can be quickly changed according to the user's operation in the normal operation mode without giving discomfort due to the change.
本発明の一実施例による電気湯沸器の概略構成図1 is a schematic configuration diagram of an electric water heater according to an embodiment of the present invention; FIG. 同電機湯沸器の設定運転モードを温冷運転モードとした時の動作状態を示す説明図Explanatory diagram showing the operation state when the set operation mode of the same electric water heater is set to hot and cold operation mode 同電機湯沸器の設定運転モードをクールダウン運転モードとした時の動作状態を示す説明図Explanatory diagram showing the operation state when the set operation mode of the same electric water heater is the cool-down operation mode. 同電機湯沸器の設定運転モードをウオームアップ運転モードとした時の動作状態を示す説明図Explanatory diagram showing the operation state when the set operation mode of the same electric water heater is the warm-up operation mode.
　本発明の第１の実施の形態による電気湯沸器は、温度設定部の操作によって吐出される湯温を変更する通常運転モードと、あらかじめ設定され設定温度によって吐出される湯温を決定する設定運転モードとを有し、設定運転モードにおける第１湯温から第２湯温に到達するまでの設定運転時到達時間を、通常運転モードにおける第１湯温から第２湯温に至るまでの通常運転時到達時間よりも長くしたものである。
　本実施の形態によれば、設定運転モードにおける設定運転時到達時間を通常運転モードにおける通常運転時到達時間よりも長くすることで、設定運転モードにおける湯温変化が緩やかになり、使用者に急激な温度変化による不快感を与えず、通常運転モードでは、使用者の操作に応じて素早く湯温を変更できる。 The electric water heater according to the first embodiment of the present invention has a normal operation mode in which the temperature of hot water to be discharged is changed by operating the temperature setting unit, and a setting in which the temperature of hot water to be discharged is determined by a preset temperature. and an operation mode, wherein the set operation reaching time from the first hot water temperature to the second hot water temperature in the set operation mode is set to the normal operating time from the first hot water temperature to the second hot water temperature in the normal operation mode. It is longer than the arrival time during operation.
According to the present embodiment, by making the time to reach the set operation in the set operation mode longer than the time to reach the normal operation in the normal operation mode, the change in hot water temperature in the set operation mode becomes gradual, and the user feels a sudden change. In the normal operation mode, the hot water temperature can be changed quickly according to the user's operation without causing discomfort due to sudden temperature changes.
　本発明の第２の実施の形態は、第１の実施の形態による電気湯沸器において、設定運転モードとして、設定温度には高温側設定温度と低温側設定温度とが設定され、高温側設定温度と低温側設定温度とを繰返すことで、吐出される湯温を変更する温冷運転モードを有し、高温側設定温度を第１湯温とし、低温側設定温度を第２湯温としたものである。
　本実施の形態によれば、温冷運転モードにおいて、高温側設定温度から低温側設定温度への温度変化を緩やかにすることができる。 According to a second embodiment of the present invention, in the electric water heater according to the first embodiment, as the set operation mode, a high temperature side set temperature and a low temperature side set temperature are set as the set temperature. It has a hot and cold operation mode that changes the temperature of discharged hot water by repeating the temperature and the set temperature on the low temperature side. It is.
According to the present embodiment, in the warm/cold operation mode, the temperature change from the high temperature side set temperature to the low temperature side set temperature can be moderated.
　本発明の第３の実施の形態は、第１の実施の形態による電気湯沸器において、設定運転モードとして、設定温度には高温側設定温度と低温側設定温度とが設定され、高温側設定温度と低温側設定温度とを繰返すことで、吐出される湯温を変更する温冷運転モードを有し、低温側設定温度を第１湯温とし、高温側設定温度を第２湯温としたものである。
　本実施の形態によれば、温冷運転モードにおいて、低温側設定温度から高温側設定温度への温度変化を緩やかにすることができる。 According to a third embodiment of the present invention, in the electric water heater according to the first embodiment, as the set operation mode, a high temperature side set temperature and a low temperature side set temperature are set as the set temperature, and the high temperature side set temperature is set. By repeating the temperature and the set temperature on the low temperature side, it has a hot and cold operation mode in which the temperature of the discharged hot water is changed, the set temperature on the low temperature side is set as the first hot water temperature, and the set temperature on the high temperature side is set as the second hot water temperature. It is.
According to the present embodiment, in the hot/cold operation mode, the temperature change from the low temperature side set temperature to the high temperature side set temperature can be moderated.
　本発明の第４の実施の形態は、第１または第２の実施の形態による電気湯沸器において、設定運転モードとして、通常運転モードで使用中の湯温から所定温度低下させるクールダウン運転モードを有し、使用中の湯温を第１湯温とし、使用中の湯温から所定温度低下させたクールダウン目標湯温を第２湯温としたものである。
　本実施の形態によれば、クールダウン運転モードにおいて温度低下を緩やかにすることができる。 According to a fourth embodiment of the present invention, in the electric water heater according to the first or second embodiment, the set operation mode is a cool-down operation mode in which a predetermined temperature is lowered from the hot water temperature in use in the normal operation mode. The hot water temperature during use is set as the first hot water temperature, and the cool-down target hot water temperature that is a predetermined temperature lower than the hot water temperature during use is set as the second hot water temperature.
According to the present embodiment, it is possible to moderate the temperature drop in the cool-down operation mode.
　本発明の第５の実施の形態は、第１または第３の実施の形態による電気湯沸器において、設定運転モードとして、通常運転モードで使用中の湯温から所定温度上昇させるウオームアップ運転モードを有し、使用中の湯温を第１湯温とし、使用中の湯温から所定温度上昇させたウオームアップ目標湯温を第２湯温としたものである。
　本実施の形態によれば、ウオームアップ運転モードにおいて温度上昇を緩やかにすることができる。 According to a fifth embodiment of the present invention, in the electric water heater according to the first or third embodiment, the set operation mode is a warm-up operation mode in which the temperature of the hot water being used in the normal operation mode is raised to a predetermined temperature. The hot water temperature during use is set as the first hot water temperature, and the warm-up target hot water temperature raised by a predetermined temperature from the hot water temperature during use is set as the second hot water temperature.
According to this embodiment, the temperature rise can be moderated in the warm-up operation mode.
　本発明の第６の実施の形態は、第１から第５のいずれかの実施の形態による電気湯沸器において、電気ヒータで加熱された湯温を検出する温度検出部と、電気ヒータを制御する制御部とを備え、制御部では、温度検出部で検出される検出温度と、温度設定部での操作又は設定温度により設定された目標温度との温度差に応じて電気ヒータでの加熱速度を変更し、加熱速度として、少なくとも、通常加熱速度と、通常加熱速度より速い高速加熱速度と、通常加熱速度より遅い低速加熱速度が設定され、通常運転モードでは、温度差が所定値以下であれば通常加熱速度、温度差が所定値を超えるときは高速加熱速度とし、設定運転モードでは、低速加熱速度としたものである。
　本実施の形態によれば、設定運転モードにおける湯温変化が緩やかになり、使用者に急激な温度変化による不快感を与えず、通常運転モードでは、使用者の操作に応じて素早く湯温を変更できる。 According to a sixth embodiment of the present invention, in the electric water heater according to any one of the first to fifth embodiments, a temperature detecting section for detecting the temperature of hot water heated by the electric heater and a controller for controlling the electric heater are provided. The control unit adjusts the heating rate of the electric heater according to the temperature difference between the detected temperature detected by the temperature detection unit and the target temperature set by the operation or set temperature in the temperature setting unit. is set as the heating rate, and at least the normal heating rate, the high-speed heating rate that is faster than the normal heating rate, and the low-speed heating rate that is slower than the normal heating rate are set. For example, the heating rate is normal, and when the temperature difference exceeds a predetermined value, the heating rate is high, and in the set operation mode, the heating rate is low.
According to the present embodiment, the change in hot water temperature in the set operation mode is gradual, and the user does not feel uncomfortable due to a sudden change in temperature. can be changed.
　以下、本発明の一実施例について、図面を参照しながら説明する。
　図１は本実施例による電気湯沸器の概略構成図である。
　本実施例による電気湯沸器は、入水部１から供給される水を電気ヒータ２で加熱し、加熱された湯を出湯部３から吐出する。出湯部３には、例えばシャワーヘッドを端部に備えたシャワーホースが接続される。
　入水部１から供給される水は、タンク４に導かれ、タンク４内で電気ヒータ２によって加熱される。温度検出部５は、出湯部３に備えられており、電気ヒータ２で加熱された湯温を検出する。
　入水部１からタンク４までの流路には、入水量を検出する流量検出部６を備えている。
　電気湯沸器は、第１制御基板７、第２制御基板８、及びヒータ制御素子９を備えている。
　第１制御基板７は、トランスを有し、ＡＣ電源をＤＣ電源に変換して第２制御基板８及びヒータ制御素子９に電力を供給する。
　第２制御基板８には、操作部１０、表示部１１、及び制御部１２を備えている。
　操作部１０には、温度設定部１０ａとモード操作部１０ｂとを有している。使用者は、温度設定部１０ａを操作することで吐出される湯温を変更する。また使用者は、モード操作部１０ｂを操作することで、設定運転モードの設定や運転指示を行える。
　表示部１１では、湯温や設定運転モードを表示する。
　制御部１２では、ヒータ制御素子９を介して電気ヒータ２を制御する。 An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram of an electric water heater according to this embodiment.
The electric water heater according to this embodiment heats water supplied from a water inlet portion 1 with an electric heater 2 and discharges the heated hot water from a hot water outlet portion 3 . A shower hose having, for example, a shower head at its end is connected to the hot water outlet 3 .
Water supplied from the water inlet 1 is led to the tank 4 and heated by the electric heater 2 inside the tank 4 . The temperature detection unit 5 is provided in the hot water supply unit 3 and detects the temperature of hot water heated by the electric heater 2 .
A flow path from the water inlet portion 1 to the tank 4 is provided with a flow rate detection portion 6 for detecting the amount of water entering.
The electric water heater comprises a first control board 7 , a second control board 8 and heater control elements 9 .
The first control board 7 has a transformer, converts AC power into DC power, and supplies power to the second control board 8 and the heater control element 9 .
The second control board 8 includes an operation section 10 , a display section 11 and a control section 12 .
The operation unit 10 has a temperature setting unit 10a and a mode operation unit 10b. The user changes the temperature of the hot water to be discharged by operating the temperature setting section 10a. Further, the user can set the set operation mode and issue an operation instruction by operating the mode operation unit 10b.
The display unit 11 displays hot water temperature and set operation mode.
The controller 12 controls the electric heater 2 via the heater control element 9 .
　電気湯沸器は、温度設定部１０ａの操作によって吐出される湯温を変更する通常運転モードと、あらかじめ設定され設定温度によって吐出される湯温を決定する設定運転モードとを有している。
　そして、設定運転モードにおける第１湯温から第２湯温に到達するまでの設定運転時到達時間は、通常運転モードにおける第１湯温から第２湯温に至るまでの通常運転時到達時間よりも長くしている。
　制御部１２は、温度検出部５からの検出温度を常に取り込み、目標温度まで加熱する電力をＰＩＤフィードバック制御している。制御部１２では、温度検出部５で検出される検出温度と、温度設定部１０ａでの操作又は設定温度により設定された目標温度との温度差に応じて電気ヒータ２での加熱速度を変更する。加熱速度は、温度差（偏差）に対して一定のゲインをかけて調整する。ゲインが高いと加熱速度は速く、ゲインが低いと加熱速度は遅くなる。本実施例では、ゲインを変更することで、加熱速度として、少なくとも、通常加熱速度と、通常加熱速度より速い高速加熱速度と、通常加熱速度より遅い低速加熱速度とが設定されている。通常運転モードでは、偏差が所定値以下であれば通常加熱速度、偏差が所定値を超えるときは高速加熱速度とし、設定運転モードでは、低速加熱速度とする。
　通常運転モードでは、通常加熱速度又は高速加熱速度とし、設定運転モードでは、低速加熱速度とすることで、設定運転時到達時間を通常運転時到達時間よりも長くすることができる。なお、通常運転モードでは、偏差が所定値以下であれば通常加熱速度、偏差が所定値を超えるときは高速加熱速度とすることで、使用者の操作に応じて素早く湯温を変更できる。 The electric water heater has a normal operation mode in which the temperature of hot water to be discharged is changed by operating the temperature setting unit 10a, and a set operation mode in which the temperature of hot water to be discharged is determined according to a preset temperature.
Then, the set operation arrival time from the first hot water temperature to the second hot water temperature in the set operation mode is greater than the normal operation arrival time from the first hot water temperature to the second hot water temperature in the normal operation mode. is also longer.
The control unit 12 constantly takes in the detected temperature from the temperature detection unit 5 and performs PID feedback control of the electric power for heating up to the target temperature. The control unit 12 changes the heating rate of the electric heater 2 according to the temperature difference between the detected temperature detected by the temperature detection unit 5 and the target temperature set by the operation or set temperature in the temperature setting unit 10a. . The heating rate is adjusted by applying a constant gain to the temperature difference (deviation). A high gain results in a fast heating rate, and a low gain results in a slow heating rate. In this embodiment, by changing the gain, at least a normal heating rate, a high-speed heating rate faster than the normal heating rate, and a low-speed heating rate slower than the normal heating rate are set as the heating rate. In the normal operation mode, the normal heating rate is set when the deviation is equal to or less than a predetermined value, and the high speed heating rate is set when the deviation exceeds the predetermined value.
A normal heating rate or a high heating rate is set in the normal operation mode, and a low heating rate is set in the set operation mode, so that the set operation arrival time can be made longer than the normal operation arrival time. In the normal operation mode, the normal heating rate is set when the deviation is less than or equal to a predetermined value, and the high speed heating rate is set when the deviation exceeds the predetermined value.
　図２は、設定運転モードを温冷運転モードとした時の動作状態を示す説明図である。
　図２（ａ）は、通常運転モードにおける湯温変更操作を示している。
　図２（ａ）に示すように、温度設定部１０ａを操作することで、例えば、湯温を３８℃から３６℃に変更し、又は湯温を３６℃から３８℃に変更することができる。
　図２（ｂ）は、図２（ａ）に示す湯温を変更した場合の湯温変化を示している。
　Ｔｘ１は、湯温を３８℃から３６℃に変更した場合に、３８℃から３６℃に到達するまでの通常運転時到達時間を示している。この場合には、３８℃が第１湯温であり、３６℃が第２湯温である。
　Ｔｘ２は、湯温を３６℃から３８℃に変更した場合に、３６℃から３８℃に到達するまでの通常運転時到達時間を示している。この場合には、３６℃が第１湯温であり、３８℃が第２湯温である。
　図２（ｃ）は、設定運転モードとして温冷運転モードの指示操作を示している。 FIG. 2 is an explanatory diagram showing the operating state when the set operation mode is set to the warm/cold operation mode.
FIG. 2(a) shows hot water temperature change operation in the normal operation mode.
As shown in FIG. 2(a), by operating the temperature setting unit 10a, the hot water temperature can be changed from 38.degree. C. to 36.degree. C. or from 36.degree.
FIG. 2(b) shows changes in hot water temperature when the hot water temperature shown in FIG. 2(a) is changed.
Tx1 indicates the time required for the water temperature to reach 36°C from 38°C during normal operation when the hot water temperature is changed from 38°C to 36°C. In this case, 38°C is the first hot water temperature and 36°C is the second hot water temperature.
Tx2 indicates the time required for the water temperature to reach 38°C from 36°C during normal operation when the hot water temperature is changed from 36°C to 38°C. In this case, 36°C is the first hot water temperature and 38°C is the second hot water temperature.
FIG. 2(c) shows an instruction operation for the warm/cold operation mode as the set operation mode.
　図２（ｃ）に示すように、モード操作部１０ｂを操作することで、設定温度として高温側設定温度と低温側設定温度とが３８℃と３６℃とに設定され、高温側設定温度である３８℃と低温側設定温度である３６℃とを繰返すことで、吐出される湯温を変更する。
　なお、本実施例では、高温側設定温度は通常運転モードで使用中の湯温とし、低温側設定温度を、高温側設定温度から２℃低い温度とした場合を示しているが、高温側設定温度と低温側設定温度とをあらかじめ設定しておくこともできる。また、高温側設定温度での時間と低温側設定温度での時間とを、あらかじめ設定することもできる。
　図２（ｄ）は、図２（ｃ）に示す温冷運転モードでの湯温変化を示している。
　Ｔｙ１は、湯温を高温側設定温度である３８℃から低温側設定温度である３６℃に到達するまでの設定運転時到達時間を示している。この場合には、高温側設定温度である３８℃が第１湯温であり、低温側設定温度である３６℃が第２湯温である。
　Ｔｙ２は、湯温を低温側設定温度である３６℃から高温側設定温度である３８℃に到達するまでの設定運転時到達時間を示している。この場合には、低温側設定温度である３６℃が第１湯温であり、高温側設定温度である３８℃が第２湯温である。 As shown in FIG. 2(c), by operating the mode operation unit 10b, the high temperature side set temperature and the low temperature side set temperature are set to 38° C. and 36° C., respectively, and the high temperature side set temperature is set. By repeating 38°C and 36°C, which is the set temperature on the low temperature side, the temperature of the discharged hot water is changed.
In this embodiment, the high temperature setting is set to the temperature of the hot water being used in the normal operation mode, and the low temperature setting is 2°C lower than the high temperature setting. It is also possible to preset the temperature and the set temperature on the low temperature side. Also, the time at the high temperature setting temperature and the time at the low temperature setting temperature can be set in advance.
FIG. 2(d) shows hot water temperature changes in the hot/cold operation mode shown in FIG. 2(c).
Ty1 indicates the set operation time until the hot water temperature reaches 36° C., which is the low temperature side set temperature, from 38° C., which is the high temperature side set temperature. In this case, the high set temperature of 38° C. is the first hot water temperature, and the low set temperature of 36° C. is the second hot water temperature.
Ty2 indicates the set operation time until the hot water temperature reaches 38° C., which is the high temperature side set temperature, from 36° C., which is the low temperature side set temperature. In this case, the low set temperature of 36° C. is the first hot water temperature, and the high set temperature of 38° C. is the second hot water temperature.
　図２に示すように、設定運転時到達時間Ｔｙ１は通常運転時到達時間Ｔｘ１よりも長くし、設定運転時到達時間Ｔｙ２は通常運転時到達時間Ｔｘ２よりも長くしている。
　設定運転時到達時間Ｔｙ１を通常運転時到達時間Ｔｘ１よりも長くすることで、温冷運転モードにおいて高温側設定温度から低温側設定温度への温度変化を緩やかにすることができる。
　また、設定運転時到達時間Ｔｙ２を通常運転時到達時間Ｔｘ２よりも長くすることで、温冷運転モードにおいて低温側設定温度から高温側設定温度への温度変化を緩やかにすることができる。
　このように、温冷運転モードにおける設定運転時到達時間Ｔｙ１、Ｔｙ２を通常運転モードにおける通常運転時到達時間Ｔｘ１、Ｔｘ２よりも長くすることで、温冷運転モードにおける湯温変化が緩やかになり、使用者に急激な温度変化による不快感を与えず、通常運転モードでは、使用者の操作に応じて素早く湯温を変更できる。 As shown in FIG. 2, the set operation arrival time Ty1 is longer than the normal operation arrival time Tx1, and the set operation arrival time Ty2 is longer than the normal operation arrival time Tx2.
By making the set operation arrival time Ty1 longer than the normal operation arrival time Tx1, the temperature change from the high temperature set temperature to the low temperature set temperature can be moderated in the hot/cold operation mode.
Further, by making the set operation arrival time Ty2 longer than the normal operation arrival time Tx2, the temperature change from the low temperature side set temperature to the high temperature side set temperature can be moderated in the hot/cold operation mode.
In this way, by making the set operation arrival times Ty1 and Ty2 in the hot/cold operation mode longer than the normal operation arrival times Tx1 and Tx2 in the normal operation mode, the change in hot water temperature in the hot/cold operation mode becomes gentle. The temperature of the hot water can be quickly changed according to the user's operation in the normal operation mode without causing the user to feel uncomfortable due to the sudden temperature change.
　図３は、設定運転モードをクールダウン運転モードとした時の動作状態を示す説明図である。
　図３（ａ）は、通常運転モードにおける湯温変更操作を示している。
　図３（ａ）に示すように、温度設定部１０ａを操作することで、例えば、湯温を３８℃から３６℃に変更することができる。
　図３（ｂ）は、図３（ａ）に示す湯温を変更した場合の湯温変化を示している。
　Ｔｘ１は、湯温を３８℃から３６℃に変更した場合に、３８℃から３６℃に到達するまでの通常運転時到達時間を示している。この場合には、３８℃が第１湯温であり、３６℃が第２湯温である。 FIG. 3 is an explanatory diagram showing an operation state when the set operation mode is the cool-down operation mode.
FIG. 3(a) shows hot water temperature changing operation in the normal operation mode.
As shown in FIG. 3A, by operating the temperature setting unit 10a, the hot water temperature can be changed from 38.degree. C. to 36.degree.
FIG. 3(b) shows changes in hot water temperature when the hot water temperature shown in FIG. 3(a) is changed.
Tx1 indicates the time required for the water temperature to reach 36°C from 38°C during normal operation when the hot water temperature is changed from 38°C to 36°C. In this case, 38°C is the first hot water temperature and 36°C is the second hot water temperature.
　図３（ｃ）は、設定運転モードとしてクールダウン運転モードの指示操作を示している。
　図３（ｃ）に示すように、モード操作部１０ｂを操作することで、通常運転モードで使用中の湯温から所定温度低下させる。図３（ｃ）では通常運転モードで使用中の湯温が３８℃であることを示している。
　なお、本実施例では、クールダウン運転モードにおいて低下させる所定温度を２℃として説明する。従って、使用中の湯温が３８℃で所定温度が２℃であるため、クールダウン目標湯温は３６℃である。
　図３（ｄ）は、図３（ｃ）に示すクールダウン運転モードでの湯温変化を示している。
　Ｔｙ１は、使用中の湯温である３８℃からクールダウン目標湯温である３６℃に到達するまでの設定運転時到達時間を示している。この場合には、使用中の湯温である３８℃が第１湯温であり、クールダウン目標湯温である３６℃が第２湯温である。 FIG. 3(c) shows an instruction operation for the cool-down operation mode as the set operation mode.
As shown in FIG. 3(c), by operating the mode operation unit 10b, the hot water temperature during use in the normal operation mode is lowered by a predetermined temperature. FIG. 3(c) shows that the hot water temperature during use is 38° C. in the normal operation mode.
In this embodiment, the predetermined temperature to be lowered in the cool-down operation mode is assumed to be 2°C. Therefore, since the hot water temperature during use is 38°C and the predetermined temperature is 2°C, the target hot water temperature for cooling down is 36°C.
FIG. 3(d) shows hot water temperature changes in the cool-down operation mode shown in FIG. 3(c).
Ty1 indicates the set operating time from 38° C., which is the hot water temperature in use, to 36° C., which is the cool-down target hot water temperature. In this case, the hot water temperature during use of 38°C is the first hot water temperature, and the cool-down target hot water temperature of 36°C is the second hot water temperature.
　図３に示すように、設定運転時到達時間Ｔｙ１は通常運転時到達時間Ｔｘ１よりも長くしている。
　設定運転時到達時間Ｔｙ１を通常運転時到達時間Ｔｘ１よりも長くすることで、クールダウン運転モードにおいて温度低下を緩やかにすることができる。
　このように、クールダウン運転モードにおける設定運転時到達時間Ｔｙ１を通常運転モードにおける通常運転時到達時間Ｔｘ１よりも長くすることで、クールダウン運転モードにおける湯温変化が緩やかになり、使用者に急激な温度変化による不快感を与えず、通常運転モードでは、使用者の操作に応じて素早く湯温を変更できる。 As shown in FIG. 3, the set operation arrival time Ty1 is longer than the normal operation arrival time Tx1.
By making the set operation arrival time Ty1 longer than the normal operation arrival time Tx1, the temperature drop can be moderated in the cool-down operation mode.
Thus, by making the set operation arrival time Ty1 in the cool-down operation mode longer than the normal operation arrival time Tx1 in the normal operation mode, the change in the hot water temperature in the cool-down operation mode becomes gentle, and the user feels a sudden change. In the normal operation mode, the hot water temperature can be changed quickly according to the user's operation without causing discomfort due to sudden temperature changes.
　図４は、設定運転モードをウオームアップ運転モードとした時の動作状態を示す説明図である。
　図４（ａ）は、通常運転モードにおける湯温変更操作を示している。
　図４（ａ）に示すように、温度設定部１０ａを操作することで、例えば、湯温を３８℃から４０℃に変更することができる。
　図４（ｂ）は、図４（ａ）に示す湯温を変更した場合の湯温変化を示している。
　Ｔｘ３は、湯温を３８℃から４０℃に変更した場合に、３８℃から４０℃に到達するまでの通常運転時到達時間を示している。この場合には、３８℃が第１湯温であり、４０℃が第２湯温である。 FIG. 4 is an explanatory diagram showing an operation state when the set operation mode is the warm-up operation mode.
FIG. 4(a) shows hot water temperature changing operation in the normal operation mode.
As shown in FIG. 4A, by operating the temperature setting unit 10a, the hot water temperature can be changed from 38° C. to 40° C., for example.
FIG. 4(b) shows changes in hot water temperature when the hot water temperature shown in FIG. 4(a) is changed.
Tx3 indicates the time required for the water temperature to reach 40°C from 38°C during normal operation when the hot water temperature is changed from 38°C to 40°C. In this case, 38°C is the first hot water temperature, and 40°C is the second hot water temperature.
　図４（ｃ）は、設定運転モードとしてウオームアップ運転モードの指示操作を示している。
　図４（ｃ）に示すように、モード操作部１０ｂを操作することで、通常運転モードで使用中の湯温から所定温度上昇させる。図４（ｃ）では通常運転モードで使用中の湯温が３８℃であることを示している。
　なお、本実施例では、ウオームアップ運転モードにおいて上昇させる所定温度を２℃として説明する。従って、使用中の湯温が３８℃で所定温度が２℃であるため、ウオームアップ目標湯温は４０℃である。
　図４（ｄ）は、図４（ｃ）に示すウオームアップ運転モードでの湯温変化を示している。
　Ｔｙ３は、使用中の湯温である３８℃からウオームアップ目標湯温である４０℃に到達するまでの設定運転時到達時間を示している。この場合には、使用中の湯温である３８℃が第１湯温であり、ウオームアップ目標湯温である４０℃が第２湯温である。 FIG. 4(c) shows an instruction operation for the warm-up operation mode as the set operation mode.
As shown in FIG. 4(c), by operating the mode operation unit 10b, the hot water temperature during use in the normal operation mode is increased by a predetermined temperature. FIG. 4(c) shows that the hot water temperature during use is 38° C. in the normal operation mode.
In this embodiment, the predetermined temperature to be raised in the warm-up operation mode is assumed to be 2°C. Therefore, since the hot water temperature during use is 38°C and the predetermined temperature is 2°C, the warm-up target hot water temperature is 40°C.
FIG. 4(d) shows hot water temperature changes in the warm-up operation mode shown in FIG. 4(c).
Ty3 indicates the set operating time from 38° C., which is the hot water temperature in use, to 40° C., which is the warm-up target hot water temperature. In this case, the first hot water temperature is 38° C., which is the hot water temperature during use, and the second hot water temperature is 40° C., which is the warm-up target hot water temperature.
　図４に示すように、設定運転時到達時間Ｔｙ３は通常運転時到達時間Ｔｘ３よりも長くしている。
　設定運転時到達時間Ｔｙ３を通常運転時到達時間Ｔｘ３よりも長くすることで、ウオームアップ運転モードにおいて温度上昇を緩やかにすることができる。
　このように、ウオームアップ運転モードにおける設定運転時到達時間Ｔｙ３を通常運転モードにおける通常運転時到達時間Ｔｘ３よりも長くすることで、ウオームアップ運転モードにおける湯温変化が緩やかになり、使用者に急激な温度変化による不快感を与えず、通常運転モードでは、使用者の操作に応じて素早く湯温を変更できる。 As shown in FIG. 4, the set operation arrival time Ty3 is longer than the normal operation arrival time Tx3.
By making the set operation arrival time Ty3 longer than the normal operation arrival time Tx3, the temperature rise can be moderated in the warm-up operation mode.
In this way, by making the set operation arrival time Ty3 in the warm-up operation mode longer than the normal operation arrival time Tx3 in the normal operation mode, the hot water temperature change in the warm-up operation mode becomes gradual, and the user feels a sudden change. In the normal operation mode, the hot water temperature can be changed quickly according to the user's operation without causing discomfort due to sudden temperature changes.
　以上のように、本発明は、特にシャワーとして利用できる電気湯沸器に適している。 As described above, the present invention is particularly suitable for electric water heaters that can be used as showers.
　１　入水部
　２　電気ヒータ
　３　出湯部
　４　タンク
　５　温度検出部
　６　流量検出部
　７　第１制御基板
　８　第２制御基板
　９　ヒータ制御素子
　１０　操作部
　１０ａ　温度設定部
　１０ｂ　モード操作部
　１１　表示部
　１２　制御部
　Ｔｘ１、Ｔｘ２、Ｔｘ３　通常運転時到達時間
　Ｔｙ１、Ｔｙ２、Ｔｙ３　設定運転時到達時間 REFERENCE SIGNS LIST 1 water inlet 2 electric heater 3 hot water outlet 4 tank 5 temperature detector 6 flow detector 7 first control board 8 second control board 9 heater control element 10 operation unit 10a temperature setting unit 10b mode operation unit 11 display unit 12 control unit Tx1, Tx2, Tx3 Arrival time during normal operation Ty1, Ty2, Ty3 Arrival time during set operation

Claims (6)

  1. 　入水部から供給される水を電気ヒータで加熱し、加熱された湯を出湯部から吐出する電気湯沸器であって、
    温度設定部の操作によって吐出される湯温を変更する通常運転モードと、
    あらかじめ設定され設定温度によって吐出される前記湯温を決定する設定運転モードと
    を有し、
    前記設定運転モードにおける第１湯温から第２湯温に到達するまでの設定運転時到達時間を、前記通常運転モードにおける前記第１湯温から前記第２湯温に至るまでの通常運転時到達時間よりも長くした
    ことを特徴とする電気湯沸器。     An electric water heater that heats water supplied from a water inlet portion with an electric heater and discharges the heated hot water from a hot water outlet portion,
    A normal operation mode in which the temperature of hot water discharged is changed by operating the temperature setting unit;
    a setting operation mode for determining the temperature of the hot water to be discharged according to the preset temperature,
    The set operation reaching time from the first hot water temperature to the second hot water temperature in the set operation mode is defined as the normal operation reaching time from the first hot water temperature to the second hot water temperature in the normal operation mode. An electric water heater characterized by being longer than time.
  2. 　前記設定運転モードとして、
    前記設定温度には高温側設定温度と低温側設定温度とが設定され、前記高温側設定温度と前記低温側設定温度とを繰返すことで、吐出される前記湯温を変更する温冷運転モードを有し、
    前記高温側設定温度を前記第１湯温とし、
    前記低温側設定温度を前記第２湯温とした
    ことを特徴とする請求項１に記載の電気湯沸器。     As the set operation mode,
    A high temperature side set temperature and a low temperature side set temperature are set as the set temperature, and by repeating the high temperature side set temperature and the low temperature side set temperature, a hot and cold operation mode in which the temperature of the discharged hot water is changed is performed. have
    The high temperature side set temperature is the first hot water temperature,
    2. The electric water heater according to claim 1, wherein the set temperature on the low temperature side is the second hot water temperature.
  3. 　前記設定運転モードとして、
    前記設定温度には高温側設定温度と低温側設定温度とが設定され、前記高温側設定温度と前記低温側設定温度とを繰返すことで、吐出される前記湯温を変更する温冷運転モードを有し、
    前記低温側設定温度を前記第１湯温とし、
    前記高温側設定温度を前記第２湯温とした
    ことを特徴とする請求項１に記載の電気湯沸器。     As the set operation mode,
    A high temperature side set temperature and a low temperature side set temperature are set as the set temperature, and by repeating the high temperature side set temperature and the low temperature side set temperature, a hot and cold operation mode in which the temperature of the discharged hot water is changed is performed. have
    The low-temperature side set temperature is the first hot water temperature,
    2. The electric water heater according to claim 1, wherein said high temperature set temperature is set to said second hot water temperature.
  4. 　前記設定運転モードとして、
    前記通常運転モードで使用中の前記湯温から所定温度低下させるクールダウン運転モードを有し、
    前記使用中の前記湯温を前記第１湯温とし、
    前記使用中の前記湯温から前記所定温度低下させたクールダウン目標湯温を前記第２湯温とした
    ことを特徴とする請求項１または請求項２に記載の電気湯沸器。     As the set operation mode,
    Having a cool-down operation mode in which the temperature of the hot water being used in the normal operation mode is lowered by a predetermined temperature,
    The hot water temperature during use is the first hot water temperature,
    3. The electric water heater according to claim 1, wherein the second hot water temperature is set as a cool-down target hot water temperature obtained by lowering the predetermined temperature from the hot water temperature during use.
  5. 　前記設定運転モードとして、
    前記通常運転モードで使用中の前記湯温から所定温度上昇させるウオームアップ運転モードを有し、
    前記使用中の前記湯温を前記第１湯温とし、
    前記使用中の前記湯温から前記所定温度上昇させたウオームアップ目標湯温を前記第２湯温とした
    ことを特徴とする請求項１または請求項３に記載の電気湯沸器。     As the set operation mode,
    Having a warm-up operation mode in which the temperature of the hot water being used in the normal operation mode is increased by a predetermined temperature,
    The hot water temperature during use is the first hot water temperature,
    4. The electric water heater according to claim 1 or 3, wherein the second hot water temperature is set as a warm-up target hot water temperature obtained by increasing the predetermined temperature from the hot water temperature during use.
  6. 　前記電気ヒータで加熱された前記湯温を検出する温度検出部と、
    前記電気ヒータを制御する制御部と
    を備え、
    前記制御部では、
    前記温度検出部で検出される検出温度と、前記温度設定部での操作又は前記設定温度により設定された目標温度との温度差に応じて前記電気ヒータでの加熱速度を変更し、
    前記加熱速度として、少なくとも、通常加熱速度と、前記通常加熱速度より速い高速加熱速度と、前記通常加熱速度より遅い低速加熱速度とが設定され、
    前記通常運転モードでは、前記温度差が所定値以下であれば前記通常加熱速度、前記温度差が前記所定値を超えるときは前記高速加熱速度とし、
    前記設定運転モードでは、前記低速加熱速度とした
    ことを特徴とする請求項１から請求項５のいずれか１項に記載の電気湯沸器。     a temperature detection unit that detects the temperature of the hot water heated by the electric heater;
    A control unit that controls the electric heater,
    In the control unit,
    changing the heating rate of the electric heater according to the temperature difference between the detected temperature detected by the temperature detection unit and the target temperature set by the operation of the temperature setting unit or the set temperature;
    As the heating rate, at least a normal heating rate, a high-speed heating rate faster than the normal heating rate, and a low-speed heating rate slower than the normal heating rate are set,
    In the normal operation mode, the normal heating rate is set when the temperature difference is equal to or less than a predetermined value, and the high speed heating rate is set when the temperature difference exceeds the predetermined value;
    6. The electric water heater according to any one of claims 1 to 5, wherein the low heating rate is set in the set operation mode.
PCT/JP2022/038843 2021-10-25 2022-10-19 Electric water heater WO2023074478A1 (en)

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PCT/JP2022/038843 WO2023074478A1 (en) 2021-10-25 2022-10-19 Electric water heater

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05265577A (en) * 1992-03-19 1993-10-15 Kubota Corp Hot water supply device
JPH06259147A (en) * 1993-03-08 1994-09-16 Matsushita Electric Ind Co Ltd Hot water combination controller and hot water supply controller
JPH0678644B2 (en) * 1986-10-21 1994-10-05 松下電器産業株式会社 Sanitary washing equipment
JP2005315434A (en) * 2004-04-27 2005-11-10 Toyotomi Co Ltd Hot water supply temperature control device for water heater
JP2009229007A (en) * 2008-03-24 2009-10-08 Panasonic Electric Works Co Ltd Hot water supply device
JP2011089692A (en) * 2009-10-22 2011-05-06 Panasonic Corp Water heater
JP2011208898A (en) * 2010-03-30 2011-10-20 Panasonic Corp Water heater

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0678644B2 (en) * 1986-10-21 1994-10-05 松下電器産業株式会社 Sanitary washing equipment
JPH05265577A (en) * 1992-03-19 1993-10-15 Kubota Corp Hot water supply device
JPH06259147A (en) * 1993-03-08 1994-09-16 Matsushita Electric Ind Co Ltd Hot water combination controller and hot water supply controller
JP2005315434A (en) * 2004-04-27 2005-11-10 Toyotomi Co Ltd Hot water supply temperature control device for water heater
JP2009229007A (en) * 2008-03-24 2009-10-08 Panasonic Electric Works Co Ltd Hot water supply device
JP2011089692A (en) * 2009-10-22 2011-05-06 Panasonic Corp Water heater
JP2011208898A (en) * 2010-03-30 2011-10-20 Panasonic Corp Water heater

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