JP2009115332A - Hot water storage type water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage type water heater capable of displaying energy consumption efficiency (COP) of the whole today. <P>SOLUTION: This hot water storage type water heater comprising a hot water storage tank 6 for storing hot water, a heating portion 2 for boiling up hot water in the hot water storage tank 6, and a remote controller 4 provided with a display portion 31, further comprises a consumption efficiency calculating portion 34 for calculating energy consumption efficiency of one day, an average value memorizing portion 38 for memorizing an average value of the energy consumption efficiency of the past several days by the day before calculated by the consumption efficiency calculating portion 34, a consumption efficiency comparing means 39 for calculating the energy consumption efficiency of all day today by the consumption efficiency calculating portion 34 and comparing the same with the average value of the average value memorizing portion 38, and a rate displaying means 40 for displaying a result of the comparison by a rate on the displaying portion 31 of the remote controller, thus the motivation to challenge energy-saving can be increased. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot water storage type hot water supply apparatus capable of displaying the energy consumption efficiency (hereinafter referred to as COP) of the day.

Conventionally, in this type, the power consumption detecting means for detecting the power consumption of a plurality of electrical loads such as a heating means is detected for each predetermined time period, and the detected power consumption is displayed. By displaying it on the screen, it is easy to know at what time zone the user used the power, and the user can see how the display shows to improve how to use hot water. It was reflected in what to do. (For example, refer to Patent Document 1.)
Japanese Patent Laid-Open No. 2003-14301

  By the way, with this conventional one, the awareness of saving electricity is certainly improved, but it must be confirmed every time electricity is used, and it is extremely troublesome, and there is no total way of thinking throughout the day. The final result was not known.

  In order to solve the above-described problems, the present invention has a hot water storage tank comprising a hot water storage tank for storing hot water, a heating unit for boiling hot water in the hot water storage tank, and a remote controller including a display unit. In a water heater, a consumption efficiency calculation unit for calculating the energy consumption efficiency of a day, and an average value storage for storing an average value of energy consumption efficiency for the past several days up to the previous day calculated by the consumption efficiency calculation unit And the consumption efficiency comparison means for calculating the energy consumption efficiency of the day by the consumption efficiency calculation unit and comparing it with the average value of the average value storage unit, and displaying the comparison result as a percentage on the display unit of the remote controller And a ratio display means.

  As described above, according to the present invention, the COP of today's day is displayed as a percentage in comparison with the average COP of the past week. It also leads to an improvement in the awareness of savings the next day, and by displaying the consumption efficiency in%, the efficiency is easy to understand and easy to get into the user's head. Can stir up.

Next, an embodiment of the present invention will be described with reference to the drawings.
1 is a hot water storage tank unit, 2 is a heating unit comprising a heat pump unit, 3 is a hot water tap, 4 is a remote controller, and 5 is a power source.

  The hot water storage tank unit 1 includes a hot water storage tank 6 for storing hot water, a hot water supply pipe 7 connected to the upper part of the hot water storage tank 4, a water supply pipe 8 connected to the lower part of the hot water storage tank 6, and a high temperature from the hot water supply pipe 7. A mixing valve 10 that mixes water and low-temperature water from the branch pipe 9 branched from the water supply pipe 8, a hot water supply pipe 11 connected downstream of the mixing valve 8, and a hot water supply temperature sensor 12 provided in the hot water supply pipe 11. And an overpressure relief valve for releasing overpressure in the hot water storage tank 6 branched from the hot water supply pipe 7 and connected to the hot water supply temperature sensor 14 provided in the hot water supply pipe 8. 15, a pressure reducing valve 16 for reducing the incoming water pressure provided in the water supply pipe 8, a plurality of hot water storage temperature sensors 17 provided in the vertical direction of the side surface of the hot water storage tank 6, and a microcomputer for controlling the hot water storage tank unit 1. Mainly composed A hot water supply control section 18 is configured by a heating circulation circuit 19 for circulating the hot water by connecting the hot water storage tank 6 and the heating unit 2.

  The heating unit 2 includes a compressor 20 that compresses carbon dioxide refrigerant, a refrigerant-water heat exchanger 21 as a condenser, a decompressor 22, and a heat pump circuit 24 that includes an air heat exchanger 23 as an evaporator, A blower 25 for blowing air to the air heat exchanger 23, a variable capacity circulation pump 26 provided in the middle of the heating circulation circuit 19, and a refrigerant-water heat exchanger 21 inlet side of the heating circulation circuit 19 are provided. A hot water inlet temperature sensor 27 for detecting the temperature of hot water flowing into the heat exchanger 21 and hot water flowing out of the refrigerant-water heat exchanger 21 are provided on the outlet side of the refrigerant-water heat exchanger 21 of the heating circuit 19. The heat exchange outlet temperature sensor 28 for detecting the temperature of the heating unit 28 and a heating control unit 29 mainly composed of a microcomputer for controlling the heating unit 2 are configured.

  Here, the power source 5 is an electric light according to the time zone, and it is set at a low power charge at night (from 23:00 to 7:00 here). The amount of stored hot water required for the day is boiled and used, and electric power is also supplied in the daytime (from 7 o'clock to 23 o'clock) with this hourly lamp. The power source 5 is connected to a hot water supply control unit 18, and a communication signal is superimposed from the hot water supply control unit 18 to the remote controller 4 and the heating control unit 29 (including power necessary for the heat pump circuit 24) in a wired manner. To be supplied.

  When the night time zone is reached, the hot water supply control unit 18 calculates the amount of hot water storage necessary for the next day, and instructs the heating control unit 29 to boil up the target hot water storage amount by the end of the night time zone. The circuit 24 is operated, and the driving of the circulation pump 25 of the heating circulation circuit 19 is started. Then, the hot water taken out from the lower part of the hot water storage tank 6 by driving the circulation pump 26 flows into the refrigerant-water heat exchanger 21 of the heating unit 2 and is heated and returned to the upper part of the hot water storage tank 6 through the heating circuit 19. As a result, hot water is stored.

  When the hot water storage temperature sensor 17 provided on the side surface of the hot water storage tank 6 detects that a predetermined amount of high-temperature water is stored, or when the heat exchange inlet temperature sensor 27 detects a predetermined temperature or higher, the hot water supply control is performed. The unit 18 commands the heating control unit 29 to stop the heating operation, the operations of the heat pump circuit 24 and the circulation pump 26 are stopped, and the hot water storage operation is completed by the end of the night time zone.

  Here, the amount of heat stored in the hot water storage tank 6 is calculated by the hot water supply control unit 18 as the target amount of heat stored in the hot water storage load for the past several days. Varies in the range of 60 ° C. to 90 ° C. depending on the season (or the feed water temperature detected by the feed water temperature sensor 14) and the amount of target hot water stored.

  The remote controller 4 includes an operation unit 30 including a switch for setting a hot water supply set temperature, a display unit 31 formed of a dot matrix type fluorescent display tube, and a display driver circuit 32 for controlling driving of the display unit 31. In addition to controlling the operation unit 30, the display unit 31, and the display driver circuit 32, the remote control unit 33 mainly composed of a microcomputer that communicates with the hot water supply control unit 18 is provided. The hot water supply set temperature and time information set by the operation unit 30 and the remaining hot water storage amount detected by the hot water storage temperature sensor 17 are displayed. The display unit 31 may be a dot matrix type liquid crystal display unit.

  Next, when the hot-water tap 3 is opened, the high-temperature water in the upper part of the hot water storage tank 6 is pushed out to the hot water discharge pipe 7 by the pressure from the water supply pipe 8, and the mixing pipe 10 controlled by the hot water supply control unit 18 controls the low temperature of the branch pipe 9. Water and hot water supply temperature sensor 12 are mixed so that the temperature detected by hot water supply temperature set by operation unit 30 of remote controller 4 is mixed and hot water is supplied through hot water supply pipe 11.

  If the amount of hot water supply becomes larger than usual, the hot water supply control unit 18 detects that the remaining hot water storage amount detected by the hot water storage temperature sensor 17 is reduced during the daytime electric power hours, and the hot water is stored in the hot water storage tank 6. When the hot water is expected to run out, the necessary amount of heat is increased using the daytime power at that time.

Next, this embodiment of the characteristic configuration of the present invention will be described based on the block diagram shown in FIG.
34 is a consumption efficiency calculation unit for calculating COP for one day. The embodiment will be described. This consumption efficiency calculation unit 34 is configured in the hot water supply control unit 17, and before mixing water is mixed in the mixing valve 10. From the hot water temperature sensor 35 for detecting the hot water temperature T1 and the hot water flow rate sensor 36 for counting the hot water flow rate provided in the hot water pipe 11, from the hot water temperature T1 and the hot water temperature sensor 14 from the hot water temperature sensor 35 for each hot water supply operation. , And the input current B detected by the current detector 37 provided in the middle of connecting the power source 5 and the hot water supply control unit 17 are input in advance. Stand-by power C of the appliance, there is no other calorie here, and the calculation of COP = (T1-T0) × (A + C) / (B × D) is sequentially performed from the power supply voltage D (200 V) The COP of that day is stored, the average value of the COP for the past seven days up to the previous day is calculated and stored in the average value storage unit 38, and the COP of this day and this average COP are compared with the consumption efficiency. The comparison means 40 has a ratio display means 40 for displaying the comparison result on the display unit 31 of the remote controller 4 via the display driver circuit 32.

The display of the display unit 31 represents the average COP with a dotted horizontal bar 41, which is 100%, and shows the percentage of the COP for the day today with respect to the average COP of 100%. The colored bar 42 is displayed as being 90% less efficient than the average lower than the average or 120% using hot water more efficiently than the average.
Further, this display can be performed by a special operation such as adding a new switch to the operation unit 30 or simultaneously pressing two existing switches.

  It should be noted that the COP for the past 7 days is extremely high, or conversely, the extremely low COP is deleted and is not used for the calculation. The oldest COP and the latest COP are replaced every day. Thus, the average COP is always calculated with new data.

  In this way, today's COP for the day is displayed as a percentage in comparison with the average COP for the past week, so you can see at a glance how much you saved today and whether you could use hot water efficiently. It also leads to an increase in awareness, and because consumption efficiency is displayed as a percentage, it is easy to understand the efficiency and is easy to get into the user's head, and can inspire the desire to further save energy It is.

The schematic block diagram of one Embodiment of this invention. The flowchart of the principal part.

Explanation of symbols

2 Heating unit 4 Remote controller 6 Hot water storage tank 31 Display unit 34 Consumption efficiency calculation unit 38 Average value storage unit 39 Consumption efficiency comparison unit 40 Ratio display unit

Claims (2)

  Consumption for calculating the energy consumption efficiency of a day in a hot water storage hot water supply apparatus having a hot water storage tank for storing hot water, a heating unit for boiling hot water in the hot water storage tank, and a remote controller having a display unit An efficiency calculation unit, an average value storage unit for storing an average value of energy consumption efficiency for the past several days up to the previous day calculated by the consumption efficiency calculation unit, and an energy consumption efficiency of the day by the consumption efficiency calculation unit The hot water storage type hot water supply apparatus comprising: a consumption efficiency comparing means for calculating an average value of the average value storage unit and a ratio display means for displaying the comparison result as a ratio on the display unit of the remote controller .   In a hot water storage hot water supply apparatus having a hot water storage tank for storing hot water, a heating unit for boiling hot water in the hot water storage tank, and a remote controller having a display unit, the hot water discharge temperature in the hot water storage tank is set. A hot water temperature sensor for detecting, a feed water temperature sensor for detecting the temperature of the feed water, a flow rate sensor for counting the amount of hot water used in the hot water storage tank, and a current detector for detecting the input current of the hot water supply device are provided. Hot water temperature from the sensor, feed water temperature from the feed water temperature sensor, amount of hot water used from the flow sensor, input current value from the current detector, standby power input in advance, or other heat sources such as reheating heat and heating heat A consumption efficiency calculation unit that calculates the energy consumption efficiency of a day from the amount of heat, power supply voltage, etc., and energy consumption efficiency for the past several days until the previous day calculated by the consumption efficiency calculation unit An average value storage unit that stores an average value, a consumption efficiency comparison unit that calculates the energy consumption efficiency of today's day by the consumption efficiency calculation unit and compares it with the average value of the average value storage unit, and the comparison result as a ratio A hot water storage type hot water supply apparatus comprising a ratio display means for displaying on a display unit of a remote controller.

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