JP3726619B2 - Hot water storage water heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water storage type hot water supply apparatus, and more specifically, a so-called semi hot water storage type hot water storage tank is provided in a combustion can body, and hot water hot water supply, hot water heating, or reheating of a bath can be performed using the semi hot water storage tank. The present invention relates to a hot water storage type hot water supply apparatus.
[0002]
[Prior art]
Conventionally, in addition to a hot water supply circuit for supplying hot water to the kitchen or other places, a heating circuit or a bath reheating circuit is operated using one semi-hot water storage layer, so-called one can two circuits or one can three circuits semi hot water storage. A hot water supply apparatus is provided. In such a hot water supply apparatus, for example, the control for preventing excessive outflow on the hot water supply circuit side when the heating operation is performed at the same time is performed with the use capacity of the heating operation as a virtual fixed constant number. That is, during simultaneous operation, the number used for heating operation is always treated as a fixed constant number, and the remaining number obtained by subtracting the constant number for heating from the maximum combustion number of the burner of the hot water supply device, Overflow prevention control was performed.
[0003]
[Problems to be solved by the invention]
However, since the actual number of heating use is not constant, for example, the heating capacity is required in the initial stage of heating operation, and if it is used for a long time, the heating capacity is not so necessary. Therefore, if the number of used heating operation is fixed to a virtual constant number and the overflow prevention control of hot water supply operation is performed as before, the combustion number will become excessive and insufficient, and the total flow rate on the hot water supply side will be more than necessary. There is a possibility that hot water having a temperature lower than the desired temperature may be supplied due to lack of restriction of the total flow rate on the hot water supply side due to the restriction of excessive outflow.
[0004]
Therefore, the present invention eliminates the drawbacks of the conventional hot water storage type hot water supply apparatus, and even when the hot water supply operation is performed simultaneously with the heating operation or the bath reheating operation, the use capability (No. It is an object of the present invention to provide a hot water storage type hot water supply apparatus capable of grasping the number) and appropriately obtaining the ability (number) that can be used for hot water supply operation, and performing overflow prevention control without excess or deficiency.
[0005]
[Means for Solving the Problems]
  In order to achieve the above object, a hot water storage type hot water supply apparatus of the present invention is a hot water storage type hot water supply apparatus provided with a hot water storage tank heated by a burner and provided with a heating circuit in addition to a hot water supply circuit, on the hot water supply circuit side. Is provided with total flow rate adjusting means for limiting the total flow rate of hot water supply, and the controller is provided with heating capacity calculation means for calculating the use capacity on the heating circuit side during simultaneous operation of hot water supply and heating. Using the pre-calculated capacity on the heating circuit side, the maximum usable capacity on the hot water supply circuit side at the time of simultaneous operation is obtained, and this is corrected for overflow prevention.G _k And the number of corrections for preventing excessive outflowG _k Overflow prevention flow rate from the set hot water temperature and incoming water temperatureR _k By the following formulaThe total flow rate of the hot water supply circuitR _k The first feature is to perform overflow prevention control so as not to become above.
                Formula: R _k = G _k × 25 ° C / (Set hot water temperature-incoming water temperature)
  In addition to the first feature, the hot water storage type hot water supply apparatus of the present invention calculates the use capacity on the heating circuit side by the heating capacity calculation means based on at least the burner combustion number and the hot water supply output number. This is the second feature.
  The hot water storage type hot water supply apparatus of the present invention includes a hot water storage tank heated by a burner, and a hot water storage type hot water supply apparatus provided with a heating circuit in addition to the hot water supply circuit, wherein a total flow rate of hot water is supplied to the hot water supply circuit side. The controller is provided with a total flow rate control means for limiting, and the controller is provided with a heating capacity calculation means for calculating the use capacity on the heating circuit side during the single heating operation, and the heating circuit side use calculated in advance by the heating capacity calculation means Using the capacity, find the maximum usable capacity on the hot water supply circuit side during simultaneous operation of hot water supply and heating, and calculate this as the correction number for overflow preventionG _k And the number of corrections for preventing excessive outflowG _k Overflow prevention flow rate from the set hot water temperature and incoming water temperatureR _k By the following formulaThe total flow rate of the hot water supply circuitR _k The third feature is to perform overflow prevention control so as not to become above.
                Formula: R _k = G _k × 25 ° C / (Set hot water temperature-incoming water temperature)
  The hot water storage type hot water supply apparatus of the present invention includes a hot water storage tank heated by a burner, and a hot water storage type hot water supply apparatus provided with a bath replenishment circuit in addition to the hot water supply circuit. In addition to providing a total flow rate adjusting means for limiting the flow rate, the controller is provided with a bath replenishment capacity calculating means for calculating the use capacity of the bath reheating circuit side from the bath temperature. Obtain the maximum usable capacity on the hot water supply circuit side during simultaneous operation of hot water supply and bath reheating using the use capacity on the bath reheating circuit sideCorrection number G for overflow prevention _k And the correction number G for overflow prevention _k Overflow prevention flow rate R from the set hot water temperature and incoming water temperature _k Is obtained by the following equation, and the total flow rate of the hot water supply circuit is the overflow prevention flow rate R: _k Overflow prevention control so that it does not exceed the aboveThe fourth feature is to perform the above.
                Formula: R _k = G _k × 25 ° C / (Set hot water temperature-incoming water temperature)
[0006]
  According to the first feature, during the simultaneous operation of the hot water supply operation and the heating operation, for example, when both operations become stable, the actual use capacity on the heating circuit side is calculated by the heating capacity calculation means. . Then, using this calculated use capacity on the heating circuit side, the maximum usable capacity on the hot water supply circuit side is obtained.This is the correction number for preventing excessive outflow. The overflow prevention flow rate is obtained from this overflow prevention correction number, the set hot water temperature, and the incoming water temperature so that the total flow rate of the hot water supply circuit does not exceed the overflow prevention flow rate.Hot water overflow prevention control is performed.
  Therefore, according to the first feature, when the hot water supply operation and the heating operation are performed at the same time, using the ability actually used on the heating circuit side,Correction number for overflow prevention and overflow prevention flow rate are required,It is possible to supply hot water at a desired temperature at the maximum flow rate without unnecessarily squeezing.
[0007]
According to the second feature, in addition to the function and effect of the first feature, the calculation of the actual use capacity on the heating circuit side during the simultaneous operation by the heating capacity calculation means is, for example, a situation where both operations are stable. Is calculated by subtracting the number of hot water supply and hot water from the number of burners burned at that time.
[0008]
  According to the third feature, during the single operation of the heating operation, the actual use capacity on the heating circuit side is calculated by the heating capacity calculation means. Then, using the pre-calculated capacity on the heating circuit side, the maximum usable capacity on the hot water supply circuit side when the next simultaneous operation is performed is obtained.This is the correction number for preventing excessive outflow. The overflow prevention flow rate is obtained from this overflow prevention correction number, the set hot water temperature, and the incoming water temperature so that the total flow rate of the hot water supply circuit does not exceed the overflow prevention flow rate.Hot water overflow prevention control is performed.
  Therefore, according to the third feature, the overuse prevention control on the hot water supply circuit side during the simultaneous operation is performed using the actual use capacity on the heating circuit side calculated during the heating independent operation.,Maximum capacity currently availableBy calculating the overflow prevention flow rate from the overflow prevention correction numberIt is possible to supply hot water at a desired temperature at the maximum flow rate without unnecessarily squeezing.
[0009]
  According to the fourth feature, for example, during the simultaneous operation of the hot water supply operation and the bath chase operation, the actual use capacity on the bath chase circuit side is calculated by the bath chase capacity calculation means. Then, the maximum usable capacity on the hot water supply circuit side during simultaneous operation is calculated using the calculated usable capacity on the bath reheating circuit side.This is the correction number for preventing excessive outflow. The overflow prevention flow rate is obtained from this overflow prevention correction number, the set hot water temperature, and the incoming water temperature so that the total flow rate of the hot water supply circuit does not exceed the overflow prevention flow rate.Hot water overflow prevention control is performed.
  Therefore, according to the fourth feature, when the hot water supply operation and the bath reheating operation are performed simultaneously, the overflow prevention control on the hot water supply circuit side is performed using the ability actually used on the bath reheating circuit side.,Maximum capacity currently availableBy calculating the overflow prevention flow rate from the overflow prevention correction numberIt is possible to supply hot water at a desired temperature at the maximum flow rate without unnecessarily squeezing.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 is a schematic configuration diagram of a hot water storage type hot water supply apparatus according to an embodiment of the present invention, FIG. 2 is a flow chart of control for preventing excessive outflow of the hot water storage type hot water supply apparatus according to the first embodiment of the present invention, FIG. FIG. 4 is a flow chart of control for preventing an excessive outflow, explaining a second embodiment of the present invention, FIG. 4 is a schematic configuration diagram of a hot water storage type hot water supply apparatus according to a third embodiment of the present invention, and FIG. FIG. 6 is a diagram showing the relationship between bath temperature and bath output in the third embodiment.
[0011]
With reference to FIG. 1, the whole hot water storage type hot water supply apparatus is demonstrated first.
Reference numeral 10 denotes a combustion can body. The combustion chamber 11 includes a hot water storage tank 12 called a semi-hot water storage tank, and an oil burner 13 including a blower 13a and an oil spray nozzle 13b faces the combustion chamber 11. Has been provided.
The hot water storage tank 12 serves as a heat exchange medium tank, and the hot water in the hot water storage tank 12 is not provided for hot water supply. The hot water storage tank 12 is provided with a plurality of exhaust gas passages 14 penetrating in the vertical direction. The hot water storage tank 12 is provided with a hot water storage temperature sensor 12a.
[0012]
A hot water supply circuit 20 for hot water supply operation is provided for the hot water tank 12. The hot water supply circuit 20 includes a water inlet 21, a hot water heat exchange coil 22 as a hot water heat exchanger, a hot water outlet 23, a bypass 24 from the water inlet 21 to the hot water outlet 23, and the hot water outlet 23. A hot water mixing means 25 for mixing hot water from the bypass path 24, a hot water supply path 26 for leading the hot water flowing out from the hot water mixing means 25 to a hot water supply terminal 29 such as a hot water tap further downstream, and the hot water supply path 26 are branched. And a hot water supply passage 27 dedicated to the bathtub. The hot water supply heat exchanging coil 22 is soaked in the water storage tank 12 and is configured to be wound many times at a position near the outer periphery of the water storage tank 12.
The water inlet channel 21 is provided with a water inlet temperature sensor 21a and a water inlet flow rate sensor 21b, the hot water outlet channel 23 is provided with a hot water temperature sensor 23a, and the hot water supply channel 26 is provided with a hot water temperature sensor 26a.
The hot water supply passage 26 is provided with a total flow rate adjusting means 28. The total flow rate adjusting means 28 flows into the hot water supply passage 26 so that the hot water temperature does not reach the set hot water supply temperature even when the total amount of water flowing from the water inlet passage 21 is heat exchange heated. It is a flow control valve provided in order to regulate the total flow of water flow.
[0013]
A bath reheating circuit 30 for bath reheating operation is also provided for the hot water storage tank 12. The bath reheating circuit 30 has a bath heating path 31 and a heat exchange for heating the bath which is wound many times in the hot water storage tank 12 of the combustion can body 10 at a position inside the case of the heat exchange coil 22 for hot water supply. A coil 32 and a bath return path 33 are provided. The water in the bathtub (not shown) is guided into the hot water tank 12 by the circulation pump 34 and heated. A bypass path 36 is provided between the bath outward path 31 and the bath return path 33 via a three-way valve 35, and the bathtub dedicated hot water supply path 27 is provided in the bypass path 36 with an on-off valve 27 a, a flow sensor 27 b, and a check valve 27 c. Connected through.
The bath return path 33 is provided with a bath temperature sensor 33a and a bath water flow switch 33b.
[0014]
A heating circuit 40 for hot water heating operation is configured for the hot water storage tank 12. The heating circuit 40 is connected directly to the uppermost part of the hot water storage tank 12 with respect to the hot water storage tank 12 so that the hot water in the hot water storage tank 12 can be used directly. It is directly connected to the lower part of the tank 12. A circulation pump 44 is provided in the heating return path 43, and a heating low-temperature forward path 42 is branched from the middle of the downstream. A bypass passage 46 is connected to the heating return passage 43 from the upper part of the hot water storage tank 12 through a bypass valve 45. A small water storage section 47 is provided in the middle of the heating return path 43 to which the bypass path 46 is connected. The water storage section 47 has a water level detection sensor 47a for detecting the water level of the water storage tank 12 of the combustion can body 10, and a heating pressure relief valve 47b. Is provided. A reserve tank 48 replenishes water via the water storage section 47 when the amount of water decreases, for example, when the water level in the hot water tank 12 decreases.
[0015]
A controller 50 is connected to the hot water remote controller 51, the bath remote controller 52, and the heating remote controller 53, and controls each part of the apparatus.
[0016]
The hot water supply operation will be described based on the above configuration. Now, when the main switch of the hot water supply device is turned on by the hot water remote controller 51 or the like, the oil burner 13 is combusted as necessary regardless of whether the hot water supply is actually performed or not, and the combustion can body The water in the ten hot water storage tanks 12 is heated. Then, when the hot water supply terminal 29 is opened and the actual hot water supply is started, the water from the water inlet 21 is heated by the hot water in the hot water storage tank 12 by passing through the heat exchange coil 22 for hot water supply, and enters the hot water outlet 23. The hot water is discharged, and further flows through the hot water mixing means 25 to the hot water supply passage 26 and flows out from the hot water supply terminal 29.
When a heating operation is commanded by the heating remote controller 53, the circulation pump 44 is driven, the oil burner 13 is combusted as necessary, and the hot water in the hot water tank 12 circulates through the heating circuit 40 to perform heating. .
Similarly, when a bath reheating operation is commanded by the bath remote controller 52, the circulation pump 34 is driven, the oil burner 13 is burned as necessary, and the bath water circulates through the bath reheating circuit 30 and is heated.
[0017]
With reference to FIG. 2, the control for preventing the excessive outflow of the hot water storage type hot water supply apparatus according to the first embodiment of the present invention will be described.
When the heating operation is being performed (Yes in Step S1) and the hot water supply operation is being performed (Yes in Step S2), that is, when the hot water supply operation and the heating operation are simultaneously performed, the controller 50 Is the hot water storage temperature T detected by the hot water storage temperature sensor 12a of the hot water storage tank 12._cDoes not change more than 1 ° C. within 1 minute (Yes in Step S3), and the combustion number of the burner 13 does not change more than 0.5 within 1 minute (Yes in Step S4). Hot water temperature T detected by the hot water temperature sensor 23a of the hot water channel 23_sOn the condition that the temperature does not change by 1 ° C. or more within 1 minute (Yes in step S5), the actual usage capacity on the heating circuit 40 side in that state is the heating usage number G_d(Step S6).
And the capacity of use in the heating circuit 40 (number of heating use G_d) Is calculated, the controller 50 further calculates the calculated heating usage number G._dIs used to obtain the maximum capacity (number) that can be used on the hot water supply circuit 20 side, and this is calculated as a correction number G for overflow prevention._kThe obtained correction number G for overflow prevention obtained as_kOn the basis of this, overflow prevention control on the hot water supply circuit 20 side by the total flow rate adjusting means 28 is performed (step S7).
In the above, the number refers to the amount of heat that heats 1 liter of water at 25 ° C. per minute.
[0018]
In the above description, the usage capacity on the heating circuit 40 side is calculated by the heating capacity calculation means configured in the controller 50. That is, first, the hot water temperature T detected by the hot water temperature sensor 23a of the hot water supply circuit 20 is detected._sAnd the incoming water temperature T detected by the incoming water temperature sensor 21a._nAnd the hot water flow rate R flowing in the hot water outlet 23 calculated from the mixing ratio of the incoming water flow rate sensor 21b and the hot water mixing means 25._sAnd hot water supply output number G_sIs calculated by the following equation 1.
G_s= ((T_s-T_n) / 25 ° C) x R_s... Formula 1
And the burner number of burner 13 during operation (burner output number) G_bAnd the hot water supply output number G_sAnd the number G of heating use_dIs subtracted by Equation 2 and calculated.
G_d= G_b-G_s... Formula 2
Here, for example, the burner output number G_bNo. 24, hot water supply output number G_sIf the number is 20, the number G of heating use_dIs calculated as No. 4 (No. 24-20).
That is, during the simultaneous operation, the number actually used on the heating circuit 40 side is the heating number G_dIs calculated as
Therefore, the heating use number G_dIs calculated, the maximum output number G that can be burned by the burner 13 in the simultaneous operation of hot water supply and heating._bmaxIs determined, the overflow prevention correction number G_kIs calculated by the following formula 3, and the calculated correction number G for overflow prevention is calculated._kThe maximum possible flow rate corresponding to_kAnd is controlled by the total flow rate adjusting means 28 so that no further flow rate is generated.
G_k= G_bmax-G_d... Formula 3
Here, for example, burner maximum output number G_bmaxNo. 25 and the number G of heating use_d4 is the correction number G for overflow prevention._kIs calculated as No. 21 (No. 25-4).
R_k= G_kX 25 ° C / (set hot water temperature-incoming water temperature) ... Formula 4
[0019]
The condition in step S3 is a condition that the hot water storage temperature in the hot water tank 12 is stable, and is not limited to the condition specifically shown in step S3. Similarly, the condition shown in step S4 is a condition that the combustion number of the burner 13 is stable, and is not limited to the condition specifically shown in step S4. Furthermore, the condition shown in step S5 is that the temperature of the hot water in the hot water path 23 of the hot water supply circuit 20 is stable, and is not limited to the condition specifically shown in step S5.
Each of the above conditions of steps S3, S4, and S5 imposes a condition that, as a sum of them, the operation status during simultaneous operation of hot water supply and heating is stable. By obtaining the actual number of use on the hot water supply circuit 20 side in a state where the simultaneous operation is stably performed, a more accurate heating use number G_dTherefore, the more accurate correction number G for overflow prevention can be calculated._kThus, more appropriate overflow prevention can be performed.
[0020]
With reference to FIG. 3, the control for preventing the excessive outflow of the hot water storage type hot water supply apparatus according to the second embodiment of the present invention will be described.
When the heating operation is being performed independently (Yes in step S11), the controller 50 determines the hot water storage temperature T._cWhen the temperature is 75 ° C. or lower (Yes in step S12), combustion of the burner 13 is started and a combustion timer built in the controller 50 is started (step S13). In the case of this heating operation alone, the burner 13 burns at a constant burner output number G._b(Combustion capacity), for example, fixed to No. 10. And hot water storage temperature T_cWhen the temperature reaches 85 ° C. or higher (Yes in step S14), the combustion of the burner 13 is stopped, and the combustion time H during that time_onIs stored, and a combustion stop timer built in the controller 50 is started (step S15).
And the hot water storage temperature T_cWhen the temperature falls below 75 ° C. again (Yes in step S16), the combustion stop time H during that time_offIs stored (step S17), and the heating use number G_dIs updated and stored (step S18).
In the above, the output number G of the burner 13_bFixed to No. 10 above, burning time H_onFor example, 3 minutes, combustion stop time H_offFor example, assuming that 3 minutes, the actual number of heating use G_dCan be calculated by the following equation (5).
G_d= G_b× H_on/ (H_on+ H_off) ... Formula 5
That is, the actual heating use number G_dIs calculated as No. 5 (10 × 3/3 + 3).
[0021]
Number of heating use G_dIs calculated, the maximum output number G of the burner that can burn the burner 13 during the simultaneous operation of the next hot water supply and heating._bmaxWhen (for example, No. 25) is determined, the correction number G for excessive outflow prevention_kIs calculated by Equation 3 above, and the calculated correction number G for overflow prevention is calculated._kThe maximum possible flow rate corresponding to_kThe total flow rate adjusting means 28 controls the flow rate so that no further flow rate is generated.
In addition, the temperature conditions of the hot water storage tank 12 in the said step S12, S14 are not limited to the specific numerical value shown there, Other suitable temperature is used as the condition temperature for holding the hot water storage tank 12 at a preferable high temperature. Temperature can be employed.
Moreover, the calculation of the heating usage number in step S18 may be an average of a plurality of calculations.
Furthermore, the number G of heating use in step S18_dAs for the update of, when the values of the previous time and the current time are largely different, a measure not to update the values may be taken.
Number of actual heating use G on the heating circuit 40 side when heating alone_dBy calculating, the more accurate correction number G for overflow prevention at the time of simultaneous hot water supply and heating operation from the next time_kThus, more appropriate overflow prevention can be performed.
[0022]
A third embodiment of the present invention will be described with reference to FIGS. First, the configuration of the hot water storage type hot water supply apparatus of this embodiment will be described with reference to FIG.
60 is a combustion can body, 61 is a combustion chamber, and 62 is a hot water storage tank. The temperature of the hot water tank 62 is detected by a hot water temperature sensor 62a. 64 is an exhaust gas passage, and 65 is a safety valve.
The hot water supply circuit 70 includes a water inlet passage 71, a hot water outlet passage 73, a bypass passage 74, and a hot water supply passage 76 connected via hot water mixing means 75 for mixing hot water from the outlet hot water passage 73 and the bypass passage 74.
A water temperature sensor 71 a and a water flow rate sensor 71 b are provided in the water inlet path 71, a hot water temperature sensor 73 a is provided in the hot water path 73, and a hot water temperature sensor 76 a is provided in the hot water path 76. A total flow rate adjusting means 78 is provided in the hot water supply passage 76.
In this embodiment, the hot water is supplied directly from the hot water in the hot water storage tank 62 to the hot water supply, and water is replenished through the water inlet 71 by the amount of the reduced hot water in the hot water storage tank 62.
The bath reheating circuit 80 includes a bath forward path 81, a heat exchange coil 82 for heating a bath provided in the hot water storage tank 62 of the combustion can body 60, and a bath return path 83. The water in the bathtub 85 is led into the hot water storage tank 62 by the circulation pump 84 and heated.
The bath return path 83 is provided with a bath temperature sensor 83a.
A controller 90 is connected to the hot water remote controller 91 and the bath remote controller 92 for communication, and controls each part of the apparatus.
[0023]
The hot water supply operation will be described based on the above configuration. Now, in a state where the main switch of the hot water supply device is turned on by the hot water remote controller 91 or the like, the oil burner 63 is combusted as necessary regardless of whether hot water supply is actually performed or not, and a combustion can body The water in the 60 hot water storage tanks 62 is heated. Then, when a hot water supply terminal (not shown) is opened and actual hot water supply is started, hot water in the hot water storage tank 62 is discharged into the hot water supply passage 73 and mixed with water from the bypass passage 74 as necessary to the hot water supply passage 76. Supplied. When the amount of hot water in the hot water storage tank 62 decreases, water is replenished to the hot water storage tank 62 from the water inlet 71.
Similarly, when a bath reheating operation is commanded by the bath remote controller 92, the circulation pump 84 is driven, the oil burner 63 is combusted as necessary, and the bath water circulates through the bath reheating circuit 80 and is heated.
[0024]
With reference to FIG. 5, the control for preventing the excessive outflow of the hot water storage type hot water supply apparatus according to the third embodiment of the present invention will be described.
If the hot water supply terminal is opened and the hot water supply operation is started (Yes in Step S22) during the bath chasing operation (Yes in Step S21), the controller 90 determines the bath temperature T at the start of the hot water supply operation._fIs detected (step S23). And the detected bath temperature T_f, The number of use numbers in the bath chase circuit 80 at that time, that is, the number of bath use numbers G_fIs calculated (step S24).
And use capacity in bath chasing circuit 80 (number of bath use number G_f) Is calculated, the controller 90 further calculates the calculated actual use capacity (number of bath use G)._f), The maximum capacity that can be used on the hot water supply circuit 70 side (correction number G for overflow prevention)_k), And the obtained maximum usable capacity (correction number G for overflow prevention)_k) Based on the maximum possible flow rate that can be passed through the hot water supply circuit 70, that is, the excessive outflow prevention flow rate R_kIs calculated (step S25).
And the obtained overflow prevention flow rate R_kBased on the above, the excessive flow prevention control on the hot water supply circuit 70 side by the total flow rate adjusting means 78 is performed (step S26). When the hot water supply operation is stopped (Yes in step S27), the process returns to step S21.
[0025]
Bath temperature T detected in step S24_fNumber of bath use from G_fReferring to FIG. 6, the bath temperature T is calculated in advance by experiments or the like._fAnd bath use number G_fThis relationship is obtained by storing the relationship in the controller 90 as a relational expression or table. That is, when the hot water supply operation is started, the bath temperature T_f, And the detected bath temperature T_fThe number of bath use G corresponding to the controller 90_fGet.
Next, an excessive flow prevention flow rate R in step S25_kFirst, calculate the number of bath use numbers G_fIs used to correct the excessive outflow prevention correction number G, which is the maximum number of hot water supply outputs that can be actually used on the hot water supply circuit 70 side during simultaneous operation._kIs determined by Equation 6. G in the calculation of Equation 6_bmaxIs the maximum output number of the burner that the burner 63 can burn out during simultaneous operation of the bath and hot water supply.
G_k= G_bmax-G_f... Formula 6
Here, for example, burner maximum output number G_bmaxNo. 25 and the calculated number of bath use G_fIf the number is 8, the correction number G for overflow prevention_kIs calculated as No. 17 (No. 25-8).
And the calculated correction number G for overflow prevention_kTo prevent excessive outflow R_kCan be calculated by the above equation 4.
Therefore, the maximum flow rate of the hot water flow that can flow to the hot water supply circuit 70 by the total flow rate adjusting means 78 is the excessive outflow prevention flow rate R._kIt is controlled to become.
[0026]
In the above, when the hot water supply operation is started during the bath chasing operation, the number of bath use numbers G until the hot water supply operation is completed._fBy preventing the change in the temperature, the hot water supply circuit 70 side prevents the temperature of the mixing hot water from rising due to an increase in the flow rate during mixing or an increase in the amount of hot water during mixing, thereby stabilizing the hot water supply. It can be carried out.
In the above, the bath temperature T stored in the controller 90_fAnd bath use number G_fThe bath temperature T detected by the bath temperature sensor 83a provided at a position near the bathtub 85 with a constant distance from the bathtub 85._fBy using the data, it is possible to capture a state that is more appropriate to the actual state of the bath, and it is possible to prevent a shortage of calculated hot water supply output regardless of the state of piping installation of the bath.
[0027]
In the first and second embodiments described above, in the hot water supply apparatus having one can and three circuits shown in FIG. 1, excessive outflow prevention on the hot water supply circuit side when two operations of the hot water supply operation and the heating operation are simultaneously performed. Although the control has been described, the same applies to the case where the hot water supply operation and the bath reheating operation are performed simultaneously instead of the hot water supply operation and the heating operation.
That is, in the first embodiment and the second embodiment, the bath rebirth operation corresponding to each word, numerical value, symbol, etc. regarding the heating operation used in the flowcharts of FIG. 2 and FIG. If it is replaced with the words, numerical values, and symbols, the overflow prevention control on the hot water supply circuit side in the simultaneous operation of the hot water supply operation and the bath chasing operation is performed as it is.
[0028]
Further, in the hot water supply apparatus shown in FIG. 1, the excessive outflow prevention control in the hot water supply circuit when the hot water supply operation, the heating operation, and the bath reheating operation are simultaneously performed can be similarly performed.
In this case, in the first embodiment, when the hot water supply operation, the heating operation, and the bath reheating operation are simultaneously performed, the burner output number G is obtained when the operation becomes stable._bAnd hot water supply output number G_sFrom the above, the total number of use in the remaining heating operation and bathing operation is obtained, and this total number is used as the heating use number G._dIs used in place of, and is applied to Equations 2 to 4 to correct overflow prevention correction number G_kAnd overflow prevention flow rate R_kAnd the overflow prevention by the total flow rate adjusting means 28 may be performed.
In the second embodiment, the heating use number G is used when the heating operation is performed alone._dAnd the temperature is stored in the controller 50. Similarly, the bath temperature T in the case where the bath chasing operation is performed independently._fAnd bath use number G_fIs obtained as a relational expression or table as described in FIG. 6 in the third embodiment, for example, and stored in the controller 50, so that three operations of a hot water supply operation, a heating operation, and a bath retreat operation are performed. Are operated at the same time, the heating use number G_dAnd bath use number G_fThe total number of heating, the number of heating use G_dIs used in place of, and is applied to Equations 2 to 6 to prevent overrun prevention correction number G_kAnd overflow prevention flow rate R_kAnd the overflow prevention by the total flow rate adjusting means 28 may be performed.
[0029]
【The invention's effect】
  The present invention has the above-described configuration and operation, and according to the hot water storage type hot water supply apparatus according to claim 1, the hot water storage type hot water supply apparatus includes a hot water storage tank heated by a burner and is provided with a heating circuit in addition to the hot water supply circuit. The hot water supply circuit side is provided with total flow rate adjusting means for limiting the total flow rate of hot water supply, and the controller has a heating capacity calculation means for calculating the use capacity of the heating circuit side during simultaneous operation of hot water supply and heating. The maximum usable capacity on the hot water supply circuit side during simultaneous operation is obtained by using the use capacity on the heating circuit side calculated in advance by the heating capacity calculation means, and this is corrected for overflow preventionG _k And the number of corrections for preventing excessive outflowG _k Overflow prevention flow rate from the set hot water temperature and incoming water temperatureR _k By the following formulaThe total flow rate of the hot water supply circuitR _k Since the overrun prevention control was performed so as not to exceed the above,
                Formula: R _k = G _k × 25 ° C / (Set hot water temperature-incoming water temperature)
  When hot water supply operation and heating operation are performed at the same time, using the capacity actually used on the heating circuit side, the correction number for overflow prevention and the overflow prevention flow rate are obtained, and hot water at a desired temperature is It is possible to supply at the maximum flow rate without reducing it unnecessarily.
  Further, according to the hot water storage type hot water supply apparatus of claim 2, in addition to the effect of the configuration of claim 1, the calculation of the use capacity on the heating circuit side by the heating capacity calculation means is at least the number of burners burned Because it was calculated based on the hot water supply output number,
  Calculation of the actual usage capacity on the heating circuit side during simultaneous operation by the heating capacity calculation means is calculated by subtracting the number of hot water and hot water from the burner combustion number at that time, for example, when both operations become stable Can be easily done.
  Further, according to the hot water storage type hot water supply apparatus according to claim 3, the hot water storage type hot water supply apparatus includes a hot water storage tank heated by a burner and provided with a heating circuit in addition to the hot water supply circuit. A total flow rate adjusting means for limiting the total flow rate of the hot water supply is provided, and the controller is provided with a heating capacity calculation means for calculating the use capacity on the heating circuit side during the single heating operation, and is calculated in advance by the heating capacity calculation means. Using the use capacity on the heating circuit side, find the maximum usable capacity on the hot water supply circuit side during simultaneous operation of hot water supply and heating, and calculate this as a correction number for overflow preventionG _k And the number of corrections for preventing excessive outflowG _k Overflow prevention flow rate from the set hot water temperature and incoming water temperatureR _k By the following formulaThe total flow rate of the hot water supply circuitR _k Since the overrun prevention control was performed so as not to exceed the above,
                Formula: R _k = G _k × 25 ° C / (Set hot water temperature-incoming water temperature)
  Using the actual use capacity on the heating circuit side calculated during heating independent operation, the overflow prevention control on the hot water supply circuit side during simultaneous operation is the maximum capacity that can be used at present. By obtaining the excessive outflow prevention flow rate from the number, it becomes possible to supply hot water at a desired temperature at the maximum flow rate without unnecessarily restricting it.
  Further, according to the hot water storage type hot water supply apparatus according to claim 4, the hot water storage type hot water supply apparatus includes a hot water storage tank heated by a burner and provided with a bath reheating circuit in addition to the hot water supply circuit. Is provided with a total flow rate adjusting means for limiting the total flow rate of hot water supply, and the controller is provided with a bath replenishment capacity calculating means for calculating the use capacity on the side of the bath reheating circuit from the bath temperature. Calculate the maximum usable capacity on the hot water supply circuit side at the time of simultaneous operation of hot water supply and bath reheating using the pre-calculated use capacity on the hot water supply circuit side, and calculate this as the correction number for overflow preventionG _k And the number of corrections for preventing excessive outflowG _k Overflow prevention flow rate from the set hot water temperature and incoming water temperatureR _k By the following formulaThe total flow rate of the hot water supply circuitR _k Since the overrun prevention control was performed so as not to exceed the above,
                Formula: R _k = G _k × 25 ° C / (Set hot water temperature-incoming water temperature)
  When hot water supply operation and bath reheating operation are performed at the same time, the overflow prevention control on the hot water supply circuit side is the maximum capacity that is actually usable. By obtaining the excessive outflow prevention flow rate from the correction number for outflow prevention, it becomes possible to supply hot water at a desired temperature at the maximum flow rate without unnecessary restriction.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a hot water storage type hot water supply apparatus according to an embodiment of the present invention.
FIG. 2 is a flow chart of control for preventing excessive outflow of the hot water storage type hot water supply apparatus according to the first embodiment of the present invention.
FIG. 3 is a flow chart of control for preventing excessive outflow, explaining a second embodiment of the present invention.
FIG. 4 is a schematic configuration diagram of a hot water storage type hot water supply apparatus according to a third embodiment of the present invention.
FIG. 5 is a flowchart of control for preventing excessive outflow according to the third embodiment.
FIG. 6 is a diagram showing a relationship between bath temperature and bath output in the third embodiment.
[Explanation of symbols]
10 Combustion can body
11 Combustion chamber
12 Hot water tank
12a Hot water storage temperature sensor
13 Oil burner
20 Hot water supply circuit
21 waterway
21a Water temperature sensor
21b Incoming water flow sensor
22 Heat exchange coil for hot water supply
23 Hot Spring
23a Hot water temperature sensor
24 Bypass
25 Hot water mixing means
26 Hot water supply path
26a Hot water temperature sensor
28 Total flow control means
29 Hot water supply terminal
30 Bath chasing circuit
40 Heating circuit
50 controller
51 Hot water remote control
52 Bath remote control
53 Heating remote control
60 Burning can
61 Combustion chamber
62 Hot water tank
63 Oil burner
70 Hot water supply circuit
71 waterway
71a Water temperature sensor
71b Incoming water flow sensor
73 Hot Spring
73a Hot water temperature sensor
76 Hot water supply path
76a Hot water temperature sensor
78 Total flow control means
80 Bath chasing circuit
83a Bath temperature sensor
90 controller
91 Hot water remote control
92 Bath remote control

Claims (4)

A hot water storage type hot water supply apparatus provided with a hot water storage tank heated by a burner, and provided with a heating circuit in addition to the hot water supply circuit, provided with a total flow rate adjusting means for limiting the total flow rate of hot water supply on the hot water supply circuit side, The controller is provided with a heating capacity calculation means for calculating the usage capacity on the heating circuit side during simultaneous operation of hot water supply and heating, and at the time of simultaneous operation using the usage capacity on the heating circuit side calculated in advance by the heating capacity calculation means This seeking maximum usable capacity of the hot water supply circuit side is corrected scale number G _k for preventing excessive runoff in, over-spill prevention and a correction scale number G _k for該過outflow prevention configuration hot water supply temperature and the incoming water temperature flow R _k the seeking from the following formula, storage type hot water supply apparatus total flow rate of the hot water supply circuit and performing an over-spill prevention control so as not to be the over-spill prevention rate R _k or more.
Formula: R _k = G _k × 25 ° C./(set hot water supply temperature−incoming water temperature)   The hot water storage type hot water supply apparatus according to claim 1, wherein the calculation of the usage capacity on the heating circuit side by the heating capacity calculation means is calculated based on at least the combustion number of the burner and the hot water supply output number. A hot water storage type hot water supply apparatus provided with a hot water storage tank heated by a burner, and provided with a heating circuit in addition to the hot water supply circuit, provided with a total flow rate adjusting means for limiting the total flow rate of hot water supply on the hot water supply circuit side, The controller is provided with a heating capacity calculation means for calculating the usage capacity on the heating circuit side during the heating independent operation, and the hot water supply and the heating are simultaneously operated using the usage capacity on the heating circuit side calculated in advance by the heating capacity calculation means. This seeking maximum usable capacity of the hot water supply circuit side is corrected scale number G _k for preventing excessive runoff when, over-spill prevention and a correction scale number G _k for該過outflow prevention configuration hot water supply temperature and the incoming water temperature flow R the _k and calculated by the following equation, storage type hot water supply apparatus and performs over-spill prevention control such that the total flow rate of the hot water supply circuit does not become the over spill prevention rate R _k or more.
Formula: R _k = G _k × 25 ° C./(set hot water supply temperature−incoming water temperature) A hot water storage type hot water supply apparatus provided with a hot water storage tank heated by a burner and provided with a bath reheating circuit in addition to the hot water supply circuit, and provided with a total flow rate adjusting means for limiting the total flow rate of the hot water supply on the hot water supply circuit side In addition, the controller is provided with a bath replenishment capacity calculation means for calculating the use capacity on the side of the bath reheating circuit from the bath temperature, and the use capacity on the side of the bath reheating circuit calculated in advance by the bath replenishment capacity calculation means is used. hot water supply and the over-spill prevention correction scale number G _k this seeking maximum usable capacity of the hot water supply circuit side at the time of simultaneous operation of the bath reheating, a correction scale number G _k for該過outflow prevention configuration hot water supply temperature and Te excessive outflow preventing flow R _k from the incoming water temperature determined by the following equation, storage-type total flow rate of the hot water supply circuit and performing an over-spill prevention control so as not to be the over-spill prevention rate R _k over Hot water supply device.
Formula: R _k = G _k × 25 ° C./(set hot water supply temperature−incoming water temperature)

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