JP2009121781A - Hot water supply apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water supply apparatus, accelerating energy-saving by allowing a user to fully realize the actual operating condition to a preset operation. <P>SOLUTION: Ideal operation is performed based on the stored operation data, and the achievement degree X1 of actual operation to the preset operation is calculated, and the calculated achievement degree X1 is displayed on display parts 71b, 72b of a kitchen remote controller 71 and a bathroom remote controller 72, so that the actual operating condition to the operation preset as the ideal operation can be easily confirmed. The user is allowed to fully realize the actual operating condition to the operation preset as the ideal operation, whereby energy saving can be accelerated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot water supply apparatus capable of displaying information such as past operation states on a display unit or the like of a remote controller.

Conventionally, this type of hot water supply apparatus includes a storage means for storing information on the amount of energy consumed when water is heated, and a display means for displaying information stored in the storage means. An apparatus that displays the amount of energy consumption for each predetermined period, such as every time unit, on a display means is known (for example, see Patent Document 1).
JP 2000-274809 A

  In the conventional hot water supply device, a display means is provided on a remote control provided on the wall of the kitchen or bathroom. For example, by displaying the power consumption of the day and the previous day on the display means, the awareness of saving can be improved. ing. However, the display means only displays the power consumption of the current day and the previous day, and it is impossible to realize the actual driving state with respect to the driving set as the most ideal driving.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide hot water supply that can promote energy saving by making the user feel the actual driving state with respect to the set driving. To provide an apparatus.

  In order to achieve the above-mentioned object, the present invention stores, in a hot water supply apparatus for heating supplied water, storage means for storing information relating to past operation, and achievement degree of actual operation for the set operation in the storage means. Calculation means for calculating based on the calculated information, and display means for displaying the result calculated by the calculation means.

  Thereby, since the achievement degree of the actual driving | operation with respect to the set driving | operation is displayed, confirmation of the actual driving | running state with respect to the set driving | operation becomes easy.

  According to the present invention, since the actual driving state with respect to the set driving can be confirmed, it is possible to promote energy saving by making the user feel the actual driving state with respect to the set driving. It becomes.

  FIGS. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a schematic configuration diagram of a hot water supply apparatus, and FIG. 2 is a display unit of a kitchen remote controller and a bathroom remote controller that display achievement levels.

  This hot water supply apparatus supplies heat to the heat pump unit 10 for heating water using electric power, the tank unit 20 for storing hot water heated in the heat pump unit 10, and the tank unit 20, the bathroom, and the kitchen. Water supply pipe 30, hot water supply pipe 40 for supplying hot water stored in the tank unit 20 to the bathroom and kitchen, and a first circulation circuit 50 for circulating water between the heat pump unit 10 and the tank unit 20. And a second circulation circuit 60 for circulating water in the bathtub 61 between the tank unit 20 and the bathtub 61 in the bathroom. This hot water supply apparatus stores the hot water heated in the heat pump unit 10 in the tank unit 20 and supplies the hot water stored in the tank unit 20 as hot water for washing in the kitchen or hot water for bathing in the bathroom. It is supplied as a heat source for reheating the hot water stored in 61.

  The heat pump unit 10 includes an electric compressor 11, a gas cooler 12, an expansion valve 13, and an evaporator 14, and a refrigerant circuit 10a is configured by sequentially connecting them with a pipe made of copper or stainless steel. In addition, the refrigerant circuit 10a is filled with carbon dioxide that is in a supercritical state on the high-pressure side as a refrigerant. The gas cooler 12 is a refrigerant-water heat exchanger, and the flow path on the water side is a part of the first circulation circuit 50. The evaporator 14 is a refrigerant-air heat exchanger, and in the vicinity thereof, a blower 14a for circulating air to exchange heat with the refrigerant is provided.

  The tank unit 20 includes a hot water storage tank 21, a hot water heat exchanger 22 for exchanging heat between the water in the bathtub 61 flowing through the second circulation circuit 60 and the hot water in the hot water storage tank 21, and the hot water storage tank 21. And a third circulation circuit 23 for circulating hot water between the heat exchanger 22 for use.

  The hot water storage tank 21 is made of stainless steel, fiber reinforced plastic (FRP) or the like, and the outside is covered with a heat insulating material such as glass wool or urethane foam in order to suppress heat dissipation of the stored hot water. The hot water storage tank 21 is a 370 liter tank in this embodiment.

  The additional heat exchanger 22 is a water-water heat exchanger, and one flow path is a part of the second circulation circuit 60 and the other flow path is a part of the third circulation circuit 23. It has become.

  The third circulation circuit 23 is configured by connecting an upper part of the hot water storage tank 21, a heat exchanger 22 for additional cooking, a circulation pump 23 a, and a lower part of the hot water storage tank 21 by a copper pipe or a stainless steel pipe. The hot water in the upper part of the hot water storage tank 21 flows through the reheating heat exchanger 22 and returns to the lower part of the hot water storage tank 21.

  The water supply pipe 30 includes a first water supply pipe 31 connected to the lower part of the hot water storage tank 21, a second water supply pipe 32 connected to the hot water supply pipe 40, and a third water supply pipe connected to the faucet A in the bathroom and kitchen. 33. The water supply pipe 30 upstream of the first water supply pipe 31, the second water supply pipe 32, and the third water supply pipe 33 is provided with a pressure reducing valve 30a for reducing the water supplied from the water supply to a predetermined pressure and circulating it. It has been.

  The hot water supply pipe 40 has one end connected to the upper part of the hot water storage tank 21, and the other end connected to the first mixing valve 40 a and the second mixing valve for mixing the hot water in the hot water storage tank 21 and the water flowing through the second water supply pipe 32. The first hot water supply pipe 41 connected to 40b, one end side connected to the first mixing valve 40a, the other end side connected to the bathroom and kitchen faucet A, and one end side the second mixing valve The third hot water supply pipe 43 is connected to the second circulation circuit 60 at the other end. The hot water in the upper part of the hot water storage tank 21 flows through the hot water supply pipe 40 by the pressure of the water flowing into the hot water storage tank 21 from the first water supply pipe 31. The third hot water supply pipe 43 is provided with an electromagnetic valve 43a for opening and closing the flow path.

  The first circulation circuit 50 is configured by connecting the lower part of the hot water storage tank 21, the circulation pump 51, the gas cooler 12, and the upper part of the hot water storage tank 21 in order by a copper pipe, a stainless steel pipe, a crosslinked polyethylene pipe or the like. The water in the lower part of the tank 21 flows through the gas cooler 12 and flows into the upper part of the hot water storage tank 21.

  The second circulation circuit 60 is configured by connecting the bathtub 61, the circulation pump 62, the additional heat exchanger 22, and the bathtub 61 in order by a copper pipe stainless pipe or a crosslinked polyethylene pipe. Hot water circulates through the additional heat exchanger 22 and is returned to the bathtub 61.

  In addition, electric power for operating the hot water supply apparatus is supplied from an electric power company, and electric power generated by a plurality of power generation methods such as thermal power generation, nuclear power generation, and hydroelectric power generation is combined and supplied. It is like that. The power supplied from the power company is supplied mainly by thermal power generation and nuclear power generation during the daytime (here, 7:00 to 23:00), and at night (here, 23: 0 to 7). : 00) is mainly supplied with electric power generated by nuclear power generation. Since the amount of carbon dioxide emitted during power generation by nuclear power generation is small compared to the amount of carbon dioxide emitted by power generation by thermal power generation, the amount of carbon dioxide emitted when generating power supplied at night The amount of carbon (for example, 0.260 kgCO2 / kWh) is smaller than the amount of carbon dioxide (for example, 0.357 kgCO2 / kWh) that is discharged when generating electric power supplied in the daytime. In addition, the electric power supplied from the electric power company is compared to the electricity rate (for example, 26 yen / kWh) during the daytime period (for example, 7: 00 to 23:00), and the night time period (23: 00 to 7: 00) (for example, 8 yen / kWh) is set at a low price.

  The hot water supply device is provided in the tank unit 20 and is provided in the control unit 70 for performing operation control, the kitchen and the bathroom, respectively, and the kitchen remote controller 71 for performing operation and setting, and the bathroom. And a remote control 72.

  The control unit 70 is constituted by a microcomputer, and the memory serving as the storage means calculates the achievement level of the actual operation with respect to the operation set for operation, the setting of the operation mode, and the operation set as an ideal operation, and the kitchen. A program to be displayed on a display unit (to be described later) of the remote controller 71 for bathroom and the remote controller for bathroom 72 is stored, and data relating to the operation state such as the amount of hot water supply in the past heating operation and the time zone in which the heating operation has been performed is stored. It has come to be remembered. In addition, the control unit 70 may select an optimal operation mode so as to perform an efficient operation from the actual hot water use state with respect to the past operation state such as the temperature of the hot water stored in the hot water storage tank 21. It can be done.

  A flow rate sensor 73 for measuring the amount of water heated by the heat pump unit 10 is connected to the controller 70, which is provided in the kitchen remote controller 71, the bathroom remote controller 72, and the first circulation circuit 50.

  The kitchen remote controller 71 and the bathroom remote controller 72 are each connected to the control unit 70 by a communication cable, and are used to set a switch for operation such as supply of hot water to the bathtub 61 and additional cooking, and the temperature of the supplied hot water. Temperature setting switch, priority switch for switching the priority of the remote control for kitchen and bathroom remote control, a plurality of switches 71a and 72a such as a call switch for conversation between the kitchen and bathroom, the operating state and set temperature, etc. Display portions 71b and 72b.

  The display on the display units 71b and 72b can be switched by the operation of the switches 71a and 72a. The degree of achievement of the actual driving with respect to the driving set as an ideal driving is shown in the middle of the day and The past 6 days can be displayed.

  In the hot water supply apparatus configured as described above, a boiling operation for heating water using late-night power or a boiling operation for additionally heating water when the amount of remaining hot water in the hot water storage tank 21 falls below a predetermined amount. When performing, the compressor 11, the air blower 14a, and the circulation pump 51 are operated. As a result, the refrigerant discharged from the compressor 11 flows through the gas cooler 12 and radiates heat, then flows into the evaporator 14 via the expansion valve 13, absorbs heat, and is sucked into the compressor 11. The water in the lower part of the hot water storage tank 21 flows through the first circulation circuit 50 by the circulation pump 51, is heated by exchanging heat with the refrigerant in the gas cooler 12, and is stored on the upper side of the hot water storage tank 21. When hot water having a preset temperature is stored in the hot water storage tank 21, the compressor 11, the blower 14a, and the circulation pump 51 are stopped.

  In the boiling operation, depending on the operation mode, the temperature of the hot water stored in the hot water storage tank 21 is set in the range of 65 ° C. to 90 ° C., and the amount of the hot water stored in the hot water storage tank 21 is set in the range of 370 l to 320 l. It has become. Further, in the boiling increase operation, the temperature of the hot water stored in the hot water storage tank 21 is set to the set temperature at the previous boiling operation.

  Regarding the boiling operation, the control unit 70 calculates the time when the boiling operation is back-calculated so as to end the boiling operation at the time when the supply of midnight power is stopped in order to reduce the release of heat from the hot water storage tank 21. Start with For example, when it takes 5 hours to fill the hot water storage tank 21 with water of a predetermined temperature by the boiling operation, the boiling operation starts at 2:00 and ends at 7:00.

  Moreover, the hot water supplied from the faucet A in the kitchen or bathroom is mixed with the water flowing through the first hot water supply pipe 41 through the first hot water supply pipe 41 and the second hot water supply pipe 32 in the first mixing valve 40a. Then, the hot water becomes the set temperature set in the kitchen remote controller 71 or the bathroom remote controller 72 and is supplied by circulating through the second hot water supply pipe 42.

  The hot water supplied when hot water is stored in the bathtub 61 is mixed with the water flowing through the first hot water supply pipe 41 through the first hot water supply pipe 41 and the second water supply pipe 32 in the second mixing valve 40b. Then, it becomes hot water having a set temperature set in the kitchen remote controller 71 or the bathroom remote controller 72 and is supplied by circulating through the third hot water supply pipe 43 and the second circulation circuit 60.

  Further, in the additional cooking operation, by operating the circulation pumps 23 a and 62, the hot water in the bathtub 61 is circulated through the second circulation circuit 60, and the hot water in the hot water storage tank 21 is circulated through the third circulation circuit 23. Thus, the hot water in the bathtub 61 is heated by exchanging heat with the hot water in the upper part of the hot water storage tank 21 in the additional heat exchanger 22 and returned to the bathtub 61.

  Here, a method for calculating the actual driving achievement level X1 with respect to the driving set as the ideal driving will be described. The achievement level X1 is a numerical value b (1 / l) per 1 liter from the numerical value 100 defined as an operation in which the boiling operation is set as an ideal operation, to the amount of water a (l) heated by the additional heating operation. And subtracting a numerical value obtained by multiplying the coefficient k related to the time zone during which the heating operation is performed (for example, k = 1, 23:00 to 7:00 is k = 0.3). Calculated.

  For example, when b = 0.5, k = 1 (7:00 to 23:00), 0.3 (23:00 to 7:00), it is 7:00 by the additional heating operation in units of 24 hours. When 50 liters of water is heated between ˜23: 00 and 30 liters of water is heated between 23:00 and 7:00, the achievement level X1 = 100−50 (l) × 0.5 (1 / l) × 1-30 (l) × 0.5 (1 / l) × 0.3 = 60.5. That is, the achievement level X1 is 100 when no boiling operation is performed during 24 hours, and decreases as the amount of water heated by the boiling operation increases. In addition, the achievement level X1 becomes lower when the heating operation is performed in the time zone of 7:00 to 23:00 than in the time zone of 23:00 to 7:00, even with the amount of heated water by the same heating operation.

  Here, the coefficient k differs depending on the time zone from 7:00 to 23:00 and the time zone from 23:00 to 7:00, but the difference in the electricity rate and the difference in carbon dioxide emissions during power generation by the time zone. It is taken into consideration. That is, in the time zone from 7:00 to 23:00, the electricity bill is high, and the amount of carbon dioxide emission during power generation increases. In addition, in the time zone from 23:00 to 7:00, the electricity charge is low, and the amount of carbon dioxide emission during power generation is small. Accordingly, when the time zone in which the electricity rate changes and the time zone in which the carbon dioxide emission amount during power generation changes, the coefficient k may be set according to the respective conditions.

  Further, the achievement level X1 calculated by the control unit 70 is displayed in a bar graph with the achievement level X1 being 100 as the maximum on the display units 71b and 72b, as shown in FIG. In this bar graph, achievement levels X1 of the past seven days are displayed side by side. Thereby, the achievement level X1 of the past seven days can be easily compared.

  Thus, according to the hot water supply apparatus of the present embodiment, the achievement level X1 of the actual operation with respect to the operation set as the ideal operation is calculated based on the stored operation data, and the calculated achievement level X1 is calculated. Since the display is made on the display units 71b and 72b of the kitchen remote controller 71 and the bathroom remote controller 72, it is possible to easily confirm the actual driving state with respect to the driving set as the ideal driving. It is possible to promote energy saving by making the user feel the actual driving state with respect to the driving set as driving.

  FIGS. 3 to 7 show a second embodiment of the present invention. FIG. 3 is a schematic configuration diagram of a hot water supply apparatus. FIG. 4 is a display unit of a kitchen remote control and a bathroom remote control for displaying the achievement rate. Display unit of kitchen remote control and bathroom remote control displaying the achievement rate of only boiling operation, FIG. 6 is a display unit of kitchen remote control and bathroom remote control displaying the achievement rate of only boiling operation, FIG. 7 is boiling up It is a display part of the remote controller for kitchens and the remote controller for bathrooms which displays the achievement rate of driving | running | working and heating-up operation side by side. In addition, the same code | symbol is attached | subjected and shown to the component similar to the said embodiment.

  The controller 70 of the water heater includes a first temperature sensor 74 for detecting the water temperature before being heated by the heat pump unit 10 and a second temperature provided in the heat pump unit 10 for detecting the temperature of the outside air. A sensor 75 is connected.

  The control unit 70 performs experiments on the power consumption W (Wh) of the heat pump unit 10 when heating the water F (l) having the water temperature Tb (° C.) to the target temperature Tc (° C.) at the outside temperature Ta (° C.). Data obtained from past operation results is stored in the memory, and water is supplied to the target temperature Tc (° C.) based on the detected temperature T1 of the first temperature sensor 74 and the detected temperature T2 of the second temperature sensor 75. A power consumption amount W (Wh) for heating is calculated.

  In addition, the control unit 70 determines the carbon dioxide emission amount C (kg) and the electric charge based on the power consumption W (Wh) during the heating operation and the heating operation and the time zone during which the heating operation is performed. R (yen) is calculated, and achievement rates X2 and X3 are calculated as actual driving achievement levels with respect to the most efficient driving for each of carbon dioxide emission C (kg) and electricity rate R (yen). It is like that. In addition, the control unit 70 displays the achievement rates X2 and X3 related to the carbon dioxide emission C (kg) and the electricity rate R (yen) on the display units 71b and 72b of the kitchen remote control 71 and the bathroom remote control 72. Yes.

  In the hot water supply apparatus configured as described above, the control unit 70 calculates the achievement rate X21 related to the boiling operation as follows. The controller 70 estimates when the water F1 (l) at the detection temperature T1 (° C.) of the first temperature sensor 74 is heated to the target temperature Tc1 (° C.) at the detection temperature T2 (° C.) of the second temperature sensor 75. Power consumption amount W1 (Wh) is calculated, and carbon dioxide emission amount C1 (kg) estimated to be generated during actual boiling operation based on the calculated power consumption amount W1 (Wh) (for example, 0.260 kg CO2 / KWh). Further, the control unit 70 is based on the detected temperature T1 (° C.) of the first temperature sensor 74 and the detected temperature T2 (° C.) of the second temperature sensor 75 (for example, a water temperature of 65 ° C.). Carbon dioxide emission Cmin (kg) estimated to be generated in the water storage amount 320 l) and carbon dioxide emission estimated to be generated during the most inefficient boiling operation (for example, water temperature 90 ° C., water storage amount 370 l) Cmax1 (kg) is calculated. Further, the control unit 70 determines the carbon dioxide emission amount C1 (kg) estimated to be generated during the actual boiling operation, the carbon dioxide emission amount Cmin (kg) estimated to be generated in the most efficient boiling operation, and the most. From the carbon dioxide emission amount Cmax1 (kg) estimated to be generated during the inefficient boiling operation, the achievement rate X21 = (Cmax1-C1) / (Cmax1-Cmin) × 100 related to the boiling operation is calculated.

  Moreover, the control part 70 calculates the achievement rate X22 regarding a heating increase operation as follows. During each heating operation, the control unit 70 supplies water F2 (l) detected at the temperature T1 (° C) detected by the first temperature sensor 74 at the target temperature Tc1 (° C) at the temperature T2 (° C) detected by the second temperature sensor 75. ) To calculate the estimated power consumption W2 (Wh) at the time of heating up to, and based on the calculated power consumption W2 (Wh), the carbon dioxide emission C2 (kg estimated to be generated during actual boiling operation) ) Is calculated. At this time, since the estimated carbon dioxide emission amount per unit power differs depending on the time zone in which the reheating operation is performed, it is estimated here that it occurs during the reheating operation performed in the time zone from 7:00 to 23:00. Carbon dioxide emission amount C21 (kg) (for example, 0.357 kgCO2 / kWh) and carbon dioxide emission amount C22 (estimated to be generated during the reheating operation performed in the time zone from 23:00 to 7:00. kg) (for example, 0.260 kg CO2 / kWh). Further, the control unit 70 is based on the detected temperature T1 (° C.) of the first temperature sensor 74 and the detected temperature T2 (° C.) of the second temperature sensor 75 at the time of the most inefficient heating operation (for example, 7:00). The carbon dioxide emission amount Cmax2 (kg) estimated to be generated in the boiling operation in the time zone of ˜23: 00 and the amount of boiling water 700 l) is calculated. Further, the control unit 70 estimates the carbon dioxide emissions C21 (kg) and C22 (kg) that are estimated to be generated during actual boiling operation, and the carbon dioxide emission Cmax that is estimated to be generated during the most inefficient heating operation. From (kg), the achievement rate X22 = ((Cmax2−C21−C22) / Cmax2) × 100 regarding the heating operation is calculated.

  Therefore, the achievement rate X2 regarding the carbon dioxide emission amount C (kg) that combines the boiling operation and the additional heating operation is X2 = ((Cmax1-C1) + (Cmax2-C21-C22)) / ((Cmax-Cmin) + Cmax2) × 100.

  Moreover, the control part 70 calculates the achievement rate X3 regarding the electricity bill R (yen) similarly to the achievement rate X2 regarding the carbon dioxide emission amount C (kg). The control unit 70 calculates the achievement rate X31 related to the boiling operation as follows. The controller 70 estimates when the water F1 (l) at the detection temperature T1 (° C.) of the first temperature sensor 74 is heated to the target temperature Tc1 (° C.) at the detection temperature T2 (° C.) of the second temperature sensor 75. The electric charge R1 (yen) (for example, 8 yen / kWh) estimated to be spent during actual boiling operation based on the calculated power consumption W1 (Wh) is calculated. calculate. Further, the control unit 70 is based on the detected temperature T1 (° C.) of the first temperature sensor 74 and the detected temperature T2 (° C.) of the second temperature sensor 75 (for example, a water temperature of 65 ° C.). Electricity rate Rmin (yen) estimated to be spent on the amount of stored water 320l) and electricity rate Rmax1 (yen) estimated to be spent on the most inefficient boiling operation (for example, water temperature 90 ° C., amount of stored water 370l) Is calculated. Furthermore, the control unit 70 determines the electric charge R1 (yen) estimated to be spent during the actual boiling operation, the electric charge Rmin (yen) estimated to be the most efficient boiling operation, and the least efficient boiling. From the electricity rate Rmax1 (yen) estimated to be incurred during the raising operation, the achievement rate X31 = (Rmax1-R1) / (Rmax1-Rmin) × 100 related to the boiling operation is calculated.

  Moreover, the control part 70 calculates the achievement rate X32 regarding a heating increase operation as follows. During each heating operation, the control unit 70 supplies water F2 (l) detected at the temperature T1 (° C) detected by the first temperature sensor 74 at the target temperature Tc1 (° C) at the temperature T2 (° C) detected by the second temperature sensor 75. ) To calculate the estimated electric power consumption W2 (Wh) when heating up to, and based on the calculated electric power consumption W2 (Wh), the electric charge R2 (yen) estimated to be spent during actual boiling operation is calculated. calculate. At this time, since the estimated electricity charge per unit power differs depending on the time zone in which the reheating operation is performed, it is estimated that the recharging operation is performed during the reheating operation performed in the time zone from 7:00 to 23:00. Electricity rate R21 (yen) (for example, 26 yen / kWh) and electricity rate R22 (yen) that is estimated to be spent at the time of reheating operation performed at 23:00 to 7:00 (for example, 8 yen) / KWh). Further, the control unit 70 is based on the detected temperature T1 (° C.) of the first temperature sensor 74 and the detected temperature T2 (° C.) of the second temperature sensor 75 at the time of the most inefficient heating operation (for example, 7:00). Electricity rate Rmax2 (yen) that is estimated to be required for additional heating in the time zone of ˜23: 00 and increased boiling water amount 700 l) is calculated. Furthermore, the control unit 70 calculates from the electric charges R21 (yen) and R22 (yen) estimated to be charged during actual heating operation and the electric charge Rmax (yen) estimated to be generated during the most inefficient heating operation. The achievement rate X32 = ((Rmax2−R21−R22) / Rmax2) × 100 related to the additional heating operation is calculated.

  Therefore, the achievement rate X3 related to the electricity rate R (yen) combining the heating operation and the heating operation is X3 = ((Rmax1-R1) + (Rmax-R21-R22)) / ((Rmax-Rmin) + Rmax2) It is calculated as x100.

  Further, as shown in FIG. 4, the calculated achievement levels X2 and X3 are displayed on a bar graph with an achievement rate X2 of 100% at maximum on the display portions 71b and 72b of the kitchen remote controller 71 and the bathroom remote controller 72. In this bar graph, achievement rates X2 and X3 of the past seven days are displayed side by side. Thereby, the achievement rates X2 and X3 of the past seven days can be easily compared. Further, instead of the achievement rates X2 and X3, as shown in FIGS. 5 and 6, the boiling operation achievement rates X21 and X31 and the boiling operation achievement rates X22 and X32 are displayed on the display units 71b and 72b, respectively. Alternatively, as shown in FIG. 7, the achievement rate X21, X31 of the boiling operation and the achievement rate X22, X32 of the boiling operation may be displayed side by side on the display units 71b, 72b.

  In addition, on the display portions 71b and 72b of the kitchen remote controller 71 and the bathroom remote controller 72, one of the achievement rate X2 related to the carbon dioxide emission amount C (kg) and the achievement rate X3 related to the electric charge R (yen) is displayed. The other achievement rates X2 and X3 are displayed by the operation of 72a.

  In addition, the control unit 70 displays a display that suggests an operation mode for reducing the temperature of the water stored in the hot water storage tank 21 during the boiling operation when the results of the achievement rates X22 and X32 related to the additional heating operation are equal to or greater than a predetermined value. , 72b or automatically switches the operation mode. Further, the control unit 70 achieves the achievement rate X2 when changing to the operation mode in which the temperature of the water stored in the hot water storage tank 21 during the boiling operation is increased when the results of the achievement rates X22 and X32 related to the boiling operation are equal to or less than a predetermined value. , X3 are calculated, and when it is determined that energy saving can be achieved comprehensively, the display for suggesting the change of the operation mode is displayed on the display units 71b and 72b, or the operation mode is automatically switched. If the results of the achievement rate X2 and the achievement rate X3 are different, whether the operation mode switching display or automatic switching is performed based on the achievement rate X2 or the achievement rate X3 by operating the switches 71a and 72a. Make a selection.

  Thus, according to the hot water supply apparatus of the present embodiment, the achievement rate X2 of the actual operation with respect to the operation set as the ideal operation is calculated based on the stored operation data, and the calculated achievement rate X2 is calculated. Since the display is made on the display units 71b and 72b of the kitchen remote controller 71 and the bathroom remote controller 72, it is possible to easily confirm the actual driving state with respect to the driving set as the ideal driving. It is possible to promote energy saving by making the user feel the actual driving state with respect to the driving set as driving.

  Further, the achievement rate X2 of the carbon dioxide emission amount in the actual operation with respect to the carbon dioxide emission amount estimated to be emitted during the operation set as the ideal operation is calculated, and the achievement rate X2 is used for the kitchen remote control 71 and the bathroom. Since the information is displayed on the display units 71b and 72b of the remote controller 72, the user can be made to confirm the actual driving state from the viewpoint of carbon dioxide emission, and the awareness of environmental protection can be improved.

  In addition, an achievement rate X3 of the actual electricity charge for the electricity charge estimated to be consumed during the operation set as an ideal operation is calculated, and the achievement rate X3 of the kitchen remote controller 71 and the bathroom remote controller 72 is calculated. Since the information is displayed on the display units 71b and 72b, the user can be made to confirm the actual driving state from an economical viewpoint, and the consciousness of saving can be improved.

  In addition, since the achievement rate X2 related to the carbon dioxide emission amount and the achievement rate X3 related to the electricity bill are switched and displayed on the display portions 71b and 72b of the kitchen remote control 71 and the bathroom remote control 72, according to the preference of the user. Thus, the achievement rate X2 related to the carbon dioxide emission amount or the achievement rate X3 related to the electricity bill can be displayed, and it becomes possible to further improve the user's awareness of energy saving.

  Moreover, since the achievement levels X2 and X3 of the past seven days are displayed side by side on the display units 71b and 72b of the kitchen remote control 71 and bathroom remote control 72, the past achievement levels X2 and X3 can be easily compared. It is possible to further improve the user's awareness of energy saving.

  Further, an optimum operation mode is selected based on the past achievement rates X2 and X3, and is displayed on the display portions 71b and 72b of the kitchen remote controller 71 and bathroom remote controller 72, or the operation mode is automatically switched. Therefore, the operation can be performed in the optimum operation mode, and energy saving can be further achieved.

Schematic block diagram of a hot water supply apparatus showing a first embodiment of the present invention Display unit for kitchen remote control and bathroom remote control that displays achievement The schematic block diagram of the hot water supply apparatus which shows 2nd Embodiment of this invention. Display unit for kitchen remote control and bathroom remote control that displays the achievement rate Display unit for kitchen remote control and bathroom remote control that displays the achievement rate of only boiling operation Display unit for remote control for kitchen and remote control for bathroom that displays the achievement rate of only heating operation Display unit for kitchen remote control and bathroom remote control that displays the achievement rate of boiling operation and boiling operation side by side.

Explanation of symbols

  70: Control unit, 71: Remote control for kitchen, 71a ... Switch, 71b ... Display unit, 72: Remote control for bathroom, 72a ... Switch, 72b ... Display unit, X1 ... Achievement, X2, X3 ... Achievement rate.

Claims (6)

In a water heater that heats the supplied water,
Storage means for storing information relating to past driving;
A calculation means for calculating the achievement degree of the actual driving with respect to the set driving based on the information stored in the storage means;
A hot water supply apparatus comprising: display means for displaying a result calculated by the calculation means. The said calculating means is comprised so that the achievement level of the carbon dioxide emission amount in the actual driving | operation with respect to the carbon dioxide emission estimated to be discharged | emitted at the time of the set driving | operation may be calculated. Hot water supply device. The said calculation means is comprised so that the achievement level of the charge of the energy consumption in an actual driving | operation may be calculated with respect to the charge of the energy consumption estimated to be consumed at the time of the set driving | operation. Hot water supply device. The calculation means calculates a degree of achievement of carbon dioxide emission in actual operation with respect to carbon dioxide emission estimated to be emitted during set operation, or is estimated to be consumed during set operation. Configure to calculate the degree of achievement of energy consumption charges in actual driving against energy consumption charges,
The hot water supply apparatus according to claim 1, further comprising display switching means for displaying on the display means the degree of achievement of carbon dioxide emissions or the degree of consumption of energy consumption so as to be switchable. The hot water supply apparatus according to any one of claims 1 to 4, wherein achievement levels of past predetermined periods are displayed side by side on the display means and displayed on the display means. Multiple operation modes with different amounts of water to be heated, water temperature, etc.
The hot water supply device according to any one of claims 1 to 5, further comprising a control unit that selects an optimum operation mode based on a past achievement level.

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