JP5319603B2 - Bath kettle with water heater - Google Patents

Description

  The present invention relates to a water heater with a hot water heater, and in particular, provides information to a user regarding which one to select in a water heater with a hot water heater that can be selected between an automatic reheating mode and a manual reheating mode. It relates to a hot water heater equipped with a water heater.

  2. Description of the Related Art There is a known hot water bath with a hot water heater that can be selected between an automatic reheating mode and a manual reheating mode.

  Here, the automatic reheating mode is an operation mode in which the control device provided in the bath tub repeats combustion and stop of the tub so that the temperature of the bath water can be maintained at a preset value. For example, by repeating the control of burning the bath pot every 30 minutes and stopping the combustion when the temperature of the bathtub water rises to a preset value after the start of combustion, or the temperature of the bathtub water is a predetermined temperature ( For example, a mode that repeats the control to stop the combustion when the temperature of the bathtub water rises to a preset value after the start of combustion is adopted, for example, when the bath is lowered by about 1.5 degrees Yes.

  In manual reheating mode, when the bath is in a state where combustion is stopped, when the user selects manual reheating, the bath starts burning and the user releases manual reheating, Alternatively, the control device is configured to stop the combustion when the temperature of the bathtub water rises to a preset value after the start of combustion.

  Currently, the hot water bath with water heater is designed to allow the user to select either the automatic chasing mode or the manual chasing mode. It is not intended to provide. For example, if there is a day when the mother and child bathe at 6:00 pm and the father is expected to bathe at 10 pm, the mother can choose the automatic chasing mode when leaving the bath, You should choose whether you should be able to bathe immediately at a comfortable temperature, or whether you want to select a manual reheating mode that stops burning the bath and starts burning the bath just before your father takes a bath. Must. This choice is currently only based on the experience of the mother.

  On the other hand, in a hot water bath with a hot water heater, a proposal has been made to improve the operation system from the viewpoint of energy saving. In Patent Literature 1, manual reheating is performed in a hot water bath with a hot water heater. If there is residual hot water in the bathtub when starting, calculate the amount of heat of the remaining hot water when the bathtub is set to the set amount of hot water or hot water, and it is more economical to use the remaining hot water or supply new hot water A bath tub with a water heater is described in which it is determined whether it is more economical to display the determined content on the display means. In other words, the control device provided in the hot water heater equipped with a hot water heater determines which one saves energy and informs the user.

JP-A-11-166664

  The bath pot described in Patent Document 1 is effective for energy-saving operation when the manual reheating mode is selected. However, no consideration is given to which of the automatic tracking mode and the manual tracking mode is preferable for the user.

  The present invention has been made in view of the above circumstances, and when the user goes out of the bath, selecting either the automatic chasing mode or the manual chasing mode saves energy (or reduces carbon dioxide emissions). Information can be provided to the user, so that the user prefers energy conservation at the expense of comfort or comfort. It is an object of the present invention to disclose a bath tub with a hot water heater that can easily select the operation mode.

  The first aspect of the hot water bath with water heater according to the present invention is based on the expected bathing time human power means for inputting the expected bathing time of the next bather, and the amount of heat of the bathtub water at the time when the predicted bathing time is input. Bath water temperature predicting means for predicting the temperature of the bath water at the predicted bathing time, and a first calculation for calculating the first energy consumption or carbon dioxide emission when automatic reheating is selected until the predicted bathing time Means, and a second calculation means for calculating a second energy consumption amount or carbon dioxide emission amount when selecting to manually chase from the expected bathing time without automatically chasing until the expected bathing time, Display means for displaying the first consumed energy amount or carbon dioxide emission amount and the second consumed energy amount or carbon dioxide emission amount simultaneously or separately. To.

  In addition, the second aspect of the bath with water heater according to the present invention includes an expected bathing time input means for inputting a predicted bathing time of the next bather, and an amount of heat of the bath water at the time when the predicted bathing time is input. The bath water temperature predicting means for predicting the temperature of the bath water at the predicted bathing time based on the above, and the first energy consumption or carbon dioxide when the automatic chasing mode for performing the automatic chasing until the predicted bathing time is selected The first calculation means for calculating the discharge amount, and the second energy consumption or carbon dioxide emission when the manual reheating mode for manually retreating from the expected bathing time without selecting the expected bathing time is selected. A second calculating means for calculating the amount; a comparing means for comparing the first consumed energy amount or carbon dioxide emission amount and the second consumed energy amount or carbon dioxide emission amount; Display means for displaying the mode is determined that a small energy consumption is low or carbon dioxide emissions by comparison means, characterized in that at least comprises a.

  In another form of the second aspect, the comparison means of the hot water bath with a hot water heater calculates a difference between the first energy consumption amount or carbon dioxide emission amount and the second energy consumption amount or carbon dioxide emission amount. An arithmetic means for calculating is further provided, and the display means displays the difference at the same time.

  The aspect of the bath tub with a hot water heater according to the present invention until the hot tub is filled is the same as that of a conventional bath tub with a water heater as described in Patent Document 1. After bathing, the person who has bathed first enters the predicted bathing time of the next bather into the expected bathing time input means when getting out of the bathtub.

  The bath water temperature predicting means is based on the amount of heat of the bath water at the time when the expected bathing time is input, and when the bath water is left as it is, that is, when the bath is stopped without performing automatic bathing, Predict the bath water temperature at the expected time. Here, the amount of heat possessed by the bathtub water is an amount obtained from the amount and temperature of the bathtub water. The bath water temperature predicting means calculates and predicts the temperature of the bath water after the elapse of a predetermined time until the expected bathing time, from the relationship between the amount of heat and the amount of heat released by the bath water. Note that the amount of heat released from the bath water becomes larger and smaller immediately after the hot water filling.

  The control device includes first calculation means and second calculation means.

  The first calculating means calculates a first energy consumption amount or carbon dioxide emission amount when the automatic chasing is selected until the expected bathing time. As described above, the automatic reheating here repeats the control for stopping the combustion when the temperature of the bath water rises to a preset value after the start of the combustion, for example, by burning the bath pot every 30 minutes. Or, when the temperature of the bath water drops by a predetermined temperature (for example, about 1.5 degrees), the bath is burned, and when the temperature of the bath water rises to a preset value after the start of combustion, the bath water is burned. In the operation mode in which the control device provided in the bath tub repeats the combustion of the bath tub and the combustion stop so that the temperature of the bath water can be maintained at a preset value, such as repeating the control to stop. is there. By appropriately selecting the time interval of combustion or the set temperature drop at the start of combustion, the number of retreats up to the expected bathing time varies, but by appropriately setting these values, the first computing means Calculates the first energy consumption required to maintain the bath water at a preset temperature until the expected bathing time, or the first carbon dioxide generated when using city gas, for example. The amount of discharge can be calculated.

  The second calculation means calculates a second energy consumption amount or carbon dioxide emission amount when it is selected to manually chase from the expected bathing time without automatically chasing until the expected bathing time. Here, manual reheating is a mode in which the user starts burning the bath at the predicted bathing time with respect to the bath that is in a state where combustion is stopped, and the bath water at the predicted bathing time is described above. From the predicted temperature and the amount of bath water, the second calculating means calculates the second energy consumption required for raising the temperature of the bath water to a preset temperature or the second carbon dioxide emission amount described above. be able to.

  In the bathtub with a water heater according to the first aspect of the present invention, display means for displaying the first consumed energy amount or carbon dioxide emission amount and the second consumed energy amount or carbon dioxide emission amount simultaneously or separately. And each value is displayed on the display means. When the user desires energy saving operation or low carbon dioxide emission operation, the user selects the lower one from the display results of the display means. As described above, the amount of heat released from the bath water is large and gradually decreases immediately after filling, so that generally, the manual reheating is selected as the energy saving operation or the low carbon dioxide emission operation. However, in this case, it takes some time for the temperature of the bath water to rise to the predetermined temperature after selecting manual reheating and starting the combustion of the bath, so the comfort point is somewhat sacrificed. become. On the other hand, in the automatic chasing operation, the hot water temperature can be maintained until the expected bathing time, for example, within a temperature fluctuation of, for example, about 1.5 degrees. It becomes.

  In the bathtub with a hot water heater according to the second aspect of the present invention, there is provided a comparing means for comparing the first consumed energy amount or carbon dioxide emission amount with the second consumed energy amount or carbon dioxide emission amount. Further, the display means is configured to display a mode in which the comparison means determines that the energy consumption is low or the carbon dioxide emission is small. Different from the kettle.

  In the bathtub with a hot water supply apparatus according to the second aspect, the display means displays not a numerical value but a mode in which it is determined that the energy consumption is low or the carbon dioxide emission amount is small as the automatic chasing mode or the manual chasing mode. Therefore, it becomes easier for the user to understand. However, the user knows how much energy saving can be achieved by simply displaying “automatic chasing mode” or “manual chasing mode” compared to the case of selecting the other mode. Therefore, it may happen that the user should choose between “automatic tracking mode” and “manual tracking mode”.

  In order to solve this problem, in another form of the second aspect, as described above, the comparison means includes the first consumed energy amount or carbon dioxide emission amount and the second consumed energy amount or carbon dioxide emission amount. And a display means for displaying the difference at the same time. In this mode, the user can know the difference in energy consumption or carbon dioxide emission between the two modes with specific numerical values, so that the “automatic mode” or “manual mode” mode can be used. It becomes possible to give information to the user more accurately as to which one should be selected.

  According to the present invention, in a bath with a hot water heater that allows the user to select automatic chasing or manual chasing, when the person who bathes first leaves the bathtub, the expected bathing time of the next bather is input. When either of them is selected, immediately whether the amount of energy consumed or the amount of carbon dioxide emission necessary for setting the temperature of the bath water to a preset temperature immediately after the expected bathing time or immediately after that is reduced. It becomes possible to visually recognize.

The figure for demonstrating the structure of the bathtub with a water heater. The flowchart at the time of driving | operation of the bathtub with a water heater. The figure which shows an example of the temperature change of the bathtub water in the case of manual reheating and automatic reheating.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a bathtub with a water heater and a bathtub.

  The water heater 1 is provided with a combustion unit 10, a heat exchanger 20, a water and hot water piping group, a control device 30, and an input / display unit 70. A part of the piping group forms a circulation pipeline with the bathtub 2. Each will be described below.

  The combustion unit 10 includes two main burners 11 and 12 and a reheating burner 13. The number of main burners may be one, or three or more burners may be provided side by side. The heat exchanger 20 includes a main heat exchanger 21 for the main burners 11 and 12 and a reheating heat exchanger 22 for the reheating burner 13.

  The combustion unit 10 includes a combustion air supply fan 14, and combustion air is supplied to all the burners 11, 12, and 13. Although not shown, the water whose temperature has been increased by heat exchange in either or both of the main heat exchanger 21 and the reheating heat exchanger 22 is circulated in a bathroom, a living room, etc., and used for indoor heating, drying, and the like. You can also.

  Water is sent from the water supply pipe 41 into the main heat exchanger 21. The water supply pipe 41 is provided with a flow rate adjustment valve 42. Combustion gas is supplied to the combustion unit 10 from the gas supply pipe 61, and combustion air is sent from the combustion air supply fan 14, and each burner burns to generate combustion gas. The combustion gas generated by the combustion of the main burners 11 and 12 heats the water by exchanging heat with the water flowing through the water supply pipe 41 in the main heat exchanger 21. The heated hot water is sent to a hot water tap (not shown) in a kitchen or a washroom through a hot water pipe 43 and a subsequent hot water pipe 44 for general hot water supply. In this example, the general hot water supply hot water pipe 44 is provided with a flow rate sensor 45.

  The gas supply pipe 61 is provided with an original gas solenoid valve 62, a gas proportional valve 63, and a switching solenoid valve 64. The original gas solenoid valve 62 supplies and stops gas from the gas supply source to the gas supply line 61, the gas proportional valve 63 controls the amount of gas supplied to the combustion unit 10, and the switching solenoid valve 64 is the combustion unit. Selection of 10 combustion regions, that is, burners 11, 12, 13 to which combustion gas is supplied are selected.

  From the upstream side of the flow rate sensor 45 of the hot water pipe 43, a hot water hot water pipe 48 branches off. The hot water hot water pipe 48 is connected to the hot water circulating pipe through a hot water solenoid valve 49 and a check valve 50. The hot water circulating pipe is connected to an outgoing pipe 51 through which the hot water is sent to the bathtub 2 through the reheating heat exchanger 22 and a return pipe 52 from which the hot water is returned from the bathtub 2 to the reheating heat exchanger 22. Composed. The hot water hot water pipe 48 is connected to the return pipe 52. The return pipe 52 is provided with a sensor 36 and a pump 53 that can measure the amount of water and hot water in the bathtub 2. When the pump 53 is activated, hot water circulates between the bathtub 2 and the reheating heat exchanger 22. The outgoing pipe 51 is provided with a temperature sensor 54. In the present invention, the forward pipe 51 and the return pipe 52 constitute a part of the hot water hot water pipe 48.

  The control device 30 is provided with control means for controlling the pipe group including the combustion section 10 and the valves, as well as a control device provided in a conventionally known bath with a hot water heater, and in addition, a prediction means described later. 31, a calculation means 34 including first and second calculation means 32 and 33, and a comparison means 35 that compares the calculation results of the first and second calculation means 32 and 33. As described above, the control device 30 includes the sensor 36 that can measure the water amount and the water temperature in the bathtub 2, and a signal from the sensor 36 is sent to the prediction means 31.

  The input / display unit 70 includes a time input unit 71 and a display unit 72 for displaying the calculation results of the first and second calculation units 32 and 33 or the comparison result of the comparison unit 35, and further includes an operation switch 73, An automatic retrace switch 74 and a manual retrace switch 75 are provided. The input / display unit 70 includes a time input unit 71 and a display unit 72 for displaying the calculation results of the first and second calculation units 32 and 33 or the comparison result of the comparison unit 35. The configuration may be the same as the input and display means provided in the conventional bath with water heater.

  The operation of the hot water bath 1 will be described. By turning ON the operation switch 73, the hot water heater-equipped bath 1 starts a normal hot water operation. In this state, the control device 30 opens the hot water solenoid valve 49 of the hot water hot water pipe 48 and burns the main burners 11 and 12. Thereby, the hot water heated by the main burners 11 and 12 is supplied to the bathtub 2 through the hot water hot water pipe 48, the return pipe 52 and the forward pipe 51. When hot water having a preset amount and temperature t1 (for example, 40 degrees) is stored in the bathtub 2, the control device 30 stops the combustion of the main burners 11 and 12, and also closes the pouring electromagnetic valve 49.

  The state is a state where bathing is possible, for example, a mother and a child bathe. Hereinafter, the subsequent operations will be described with reference to the flowchart of FIG. After bathing, the bather adjusts the amount of hot water and hot water to an appropriate amount D (L) and an appropriate temperature (t1) (for example, 40 degrees) by means such as supplying hot water from the hot water pipe 44 for general hot water supply as necessary. return. At the same time, a time x predicted to be bathed by the next person, for example, a father, is input to the time input means 71 (S101). For convenience of explanation, it is assumed that the predicted bathing time is 18:00 and the predicted bathing time x is 21:00. The input predicted bathing time is sent to the control device 30.

  The sensor 36 provided in the control device 30 detects information about the water amount D (L) and the temperature t1 of the bathtub 2 at the time when the predicted bathing time x is input (S102), and sends it to the prediction means 31. The predicting means 31 calculates the total amount of heat of the hot water in the bathtub 2 at that time based on the sent information. The predicting means 31 further includes a correlation chart between the passage of time and the amount of heat release in the bathtub 2, and the calculated total heat amount and the time y1 from the present to the predicted bathing time x obtained from the chart (that is, from 18:00) The hot water temperature t2 in the bathtub 2 at the predicted bathing time x is calculated and predicted from the amount of heat released during 3 hours until 21:00 (S103).

  On the other hand, the first calculation means 32 has a program for performing automatic tracking. In this example, the program burns the above-described reheating burner 13 and continuously operates the pump 53 when a predetermined time y2 (<y1) (for example, 30 minutes) has elapsed. Further, when the temperature in the bathtub 2 reaches a preset temperature t1 (for example, 40 degrees) by the hot water heated by the combustion of the reheating burner 13 circulating in the bathtub 2, the reheating burner The combustion of 13 is stopped. The first calculating means 32 calculates the amount of energy consumed by repeated combustion of the reheating burner 13 under the program (S104). In this example, the first calculation means 32 is the number of times of reversal of combustion and combustion stop from the present to time y1 until the bathing prediction time x, that is, y1 / y2 (in this example, 180 minutes / 30 minutes = 6 times). And the amount of energy E1 (D (L) × Δta × s: Δta = t1−t3) consumed by repetitive combustion at the time of automatic reheating from the bath water temperature t3 when y2 hours have passed. Then, the result is sent to the comparison means 35 described above.

  The second calculating means 33 consumes energy E2 required to raise the temperature of the hot water in the bathtub 2 that is the temperature t2 at the predicted bathing time x predicted in S103 to a preset temperature t1 (for example, 40 degrees). (D (L) × Δtb: Δtb = t1−t2) is calculated (S105). Then, the result is sent to the comparison means 35 described above.

  The comparison means 35 compares the energy consumption amount E1 calculated by the first calculation means 32 with the energy consumption amount E2 calculated by the second calculation means 33 (S106), and displays the result on the display means 72 (S107). ). As an example of the display, a mode in which it is determined that the amount of energy consumption is small between the manual chasing mode and the automatic chasing mode may be displayed, and the comparison unit may calculate the difference between the energy consumption amount E1 and the energy consumption amount E2. In addition to any mode display, the difference between the energy consumption amounts E1 and E2 may be displayed simultaneously as a numerical value.

  The user can actively select the one with less energy consumption by looking at the display result, and when the difference in energy consumption is small, the user is given priority to comfort and the automatic chasing mode is selected. Regardless of the amount of energy consumption, the automatic chasing mode can be selected with priority on comfort. In other words, by adopting the bath with a hot water heater according to the present invention, it is possible to give the user as visual and numerical information which manual chase mode or automatic chase mode should be selected.

  In another aspect of the above description, the energy consumption amount E1 calculated by the first calculation means 32 and the energy consumption amount E2 calculated by the second calculation means 33 are directly displayed without passing through the comparison means 35. It can also be displayed by means 72 (S108, S109).

  Next, an example of an actual operation state in the bath with a water heater according to the present invention will be described. In this specific example, FIG. 3 shows the fluctuation state of the hot water temperature in the bathtub when the automatic reheating mode is selected and when the manual reheating mode is selected. In this example, the amount of water D (L) in the bathtub 2 is 200 L, the time y1 until the next bather schedules bathing is 180 minutes, the set temperature t1 is 40 degrees, and in the automatic reheating mode, y2 = 30 minutes Combustion is repeated every time. And by leaving it for 30 minutes, the hot water temperature t3 changes from 40 degrees to 38.5 degrees. That is, Δta is 1.5 degrees. And by burning for 2 minutes, water temperature returns to 40 degree | times.

  On the other hand, when the manual reheating mode is selected, that is, when left for y1 = 180 minutes, the water temperature t2 in the bathtub is 35.4 degrees, and Δtb is 4.6 degrees.

  In this example, the energy consumption E1 when the automatic chasing mode is selected is 200 (L) × (40-38.5 degrees) × 6 times = 1800 (kcal), and when the manual chasing mode is selected. The consumed energy E2 is 200 (L) × (40-35.4 degrees) = 920 (kcal). That is, in this example, the heat amount of 880 (kcal) can be reduced when the manual reheating mode is selected than when the automatic reheating mode is selected. The display means displays both the energy consumptions E1 and E2 as numerical values, or displays that the amount of energy consumption is the manual reheating mode, together with a numerical value that is a difference in the amount of heat when necessary.

  The user looks at the display and selects the manual reheating mode when getting out of the hot water, or stops burning the bath once at that time, 180 minutes later, or a few minutes before that, Try to manually chase.

  In the above description, the consumed energy amount is adopted as the calculation amount or the comparison amount. However, the amount of carbon dioxide emission generated by combustion is calculated, and the carbon dioxide emission amount is displayed as the comparison amount and the display. It can also be used as a quantity.

1 ... Bath kettle with water heater,
2 ... tub,
10 ... combustion part,
11, 12 ... main burner,
13 ... Burning burner,
20 ... heat exchanger,
21 ... Main heat exchanger,
22 ... Reheating heat exchanger,
30 ... Control device,
31 ... Predictive means,
32. First calculating means,
33. Second calculating means,
34. Calculation means,
35 ... Comparison means,
36 ... a sensor capable of measuring the amount of water and temperature in the bathtub
70: Input and display means,
71: Time input means,
72. Display means

Claims (3)

The expected bathing time human input means to input the expected bathing time of the next bather,
Bath water temperature prediction means for predicting the temperature of the bath water at the predicted bathing time based on the amount of heat of the bath water at the time when the predicted bathing time is input,
First calculating means for calculating a first consumed energy amount or carbon dioxide emission amount when automatic reheating is selected until the expected bathing time;
A second calculating means for calculating a second energy consumption amount or carbon dioxide emission amount when it is selected to manually chase from the expected bathing time without automatically chasing until the expected bathing time;
Display means for displaying the first consumed energy amount or carbon dioxide emission amount and the second consumed energy amount or carbon dioxide emission amount simultaneously or separately;
A bath with a water heater equipped with at least. An expected bathing time input means for inputting an expected bathing time of the next bather;
Bath water temperature prediction means for predicting the temperature of the bath water at the predicted bathing time based on the amount of heat of the bath water at the time when the predicted bathing time is input,
First calculating means for calculating a first energy consumption amount or carbon dioxide emission amount when an automatic chasing mode for performing chasing automatically until the expected bathing time is selected;
Second calculating means for calculating a second energy consumption amount or carbon dioxide emission amount when the manual reheating mode for manually retreating from the predicted bathing time is selected without retreating until the expected bathing time;
Comparing means for comparing the first energy consumption or carbon dioxide emission and the second energy consumption or carbon dioxide emission;
Display means for displaying the mode determined by the comparing means that the amount of energy consumption is low or the amount of carbon dioxide emission is small;
A bath with a water heater equipped with at least.   The comparison means further includes calculation means for calculating a difference between the first energy consumption amount or carbon dioxide emission amount and the second energy consumption amount or carbon dioxide emission amount, and the display means simultaneously calculates the difference. The bath tub with a water heater according to claim 2, wherein the bath tub is displayed.

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