JP2002228262A - Hot water storage type warm water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage type water heater for suitably controlling a temperature of its warm water in the water heater such as, for example, a hot water storage type water heater, a hot water storage type bath system, a hot water storage type warm water heater or the like. SOLUTION: The hot water storage type water heater comprises a hot water storage tank 10 for storing hot water, and a heating means for heating hot water in the tank 10. The water heater further comprises a hot water temperature detecting means 43 for detecting a hot water temperature in the tank, and a heating control means for controlling the heating means to maintain the hot water temperature in the tank. In this case, the control means decides a hysteresis temperature for turning on, off an operation for heating by the heating means according to a changing degree of the temperature detected by the storage tank temperature sensor 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage device such as a hot water supply type hot water supply device, a hot water storage type bath device, a hot water storage type hot water heating device, and the like. The purpose is to provide hot water equipment.

[0002]

2. Description of the Related Art As a conventional hot water storage type hot water device, a schematic configuration of a hot water device shown in FIG. 1 is already known. FIG. 1 shows a hot water supply type hot water supply apparatus. This apparatus 1 includes hot water supply circuits 31, 32, 33, and 34 for heating water and discharging hot water, reheating circuits 51, 52, and 53 for reheating hot water in a bathtub, and hot water supply. A dropping circuit 37 is provided for branching hot water from the circuit into a bathtub. In addition, the hot water supply type hot water supply device 1 includes:
A hot water storage tank 10 for storing hot water is provided, and a combustion chamber 11 is disposed below the hot water storage tank 10. Hot combustion gas in the combustion chamber passes through a combustion smoke pipe 13 and is exhausted from an exhaust unit. The hot water in the hot water storage tank 10 is heated by the heat of combustion in the combustion chamber 11 and when the combustion gas passes through the combustion tube 13.

In controlling the temperature of hot water in the hot water storage tank 10, oil fuel is sprayed from a nozzle 22 so as to maintain a predetermined temperature, and the fuel is heated in a combustion chamber. Specifically, for example, when the temperature in the hot water storage tank 10 is monitored by the hot water storage temperature sensor 43 and the temperature is to be maintained at Tx degrees, the combustion is stopped when the temperature in the hot water storage tank reaches Tx + a degrees. Then, when the temperature in the hot water storage tank decreases to Tx-a degree, combustion heating is performed again, and the combustion heating and the combustion stop are repeated between the hysteresis width of Tx-a degree and Tx + a degree, and the temperature is reduced to substantially Tx degree. The temperature of the hot water in the hot water storage tank is maintained.

[0004]

Conventionally, there is such a hot water storage type hot water apparatus, but the conventional apparatus has the following problems. In the prior art, in order to accurately maintain the temperature of the hot water in the hot water storage tank 10, if the temperature width of the hysteresis for turning on and off the combustion heating is reduced, the combustion heating is frequently turned on and off. There is a problem that the durability of the resin is reduced. Also, if the combustion is turned on and off frequently, the noise generated at that time will be bothersome,
When igniting or extinguishing, NOx and CO are likely to be generated and low N
This is contrary to the demand for realizing Ox. In addition, in such a hot water storage type hot water appliance, the accuracy of the temperature of the hot water used when the appliance is used is required. On the other hand, when the accuracy of the hot water storage temperature of the hot water stored when the appliance is not used is reduced to some extent, there is practically no trouble. Does not occur. Rather, when the combustion is frequently turned on and off when the equipment is not in use, the combustion and the combustion stop operation are frequently repeated even though they are not being used, which may be misunderstood by the user as abnormal combustion. Such a situation is undesirable. Therefore, the present invention has been made in view of the above-described problems, and has a hot-water storage type in which control of combustion heating on / off of a hot-water storage type hot water device is realized under optimum conditions according to a state of the hot-water storage type hot water device. The purpose is to provide hot water equipment.

[0005]

According to a first aspect of the present invention, there is provided a hot-water storage type hot water heater comprising a hot water storage tank for storing hot water and a heating means for heating the hot water in the hot water storage tank. Hot water temperature detecting means for detecting a hot water temperature in the hot water storage tank, a heating control means for controlling the heating means to maintain the hot water temperature in the hot water storage tank, and a heating control means for detecting the temperature of the hot water storage tank temperature sensor The temperature at which the heating means reheats is determined according to the degree of change. According to a second aspect of the present invention, there is provided a hot water storage type hot water device comprising a hot water storage tank for storing hot water and heating means for heating the hot water in the hot water storage tank. Detecting means, heating control means for controlling the heating means in order to maintain the temperature of the hot water in the hot water storage tank, and the heating control means heats the heating means in accordance with the degree of change in the temperature detected by the hot water tank temperature sensor. It is characterized in that the temperature at which the operation is stopped is determined. According to a third aspect of the present invention, there is provided a hot water storage type hot water device comprising a hot water storage tank for storing hot water and heating means for heating the hot water in the hot water storage tank. Detecting means;
A heating control means for controlling the heating means to maintain the hot water temperature in the hot water storage tank; and the heating control means turns on and off an operation of heating by the heating means according to a degree of change in temperature detected by the hot water storage tank temperature sensor. The hysteresis temperature range is determined. 5. A hot water storage device comprising: a hot water storage tank for storing hot water according to claim 4; and a heating means for heating the hot water in the hot water storage tank. Heating control means for controlling the heating means to maintain the temperature of the hot water inside, the heating control means by measuring the temperature which drops during a predetermined time when the heating means has stopped heating, the It is characterized in that a hysteresis temperature at which the heating means turns on and off the heating operation is determined. A hot water storage type hot water device according to claim 5, wherein in the hot water storage type hot water device provided with a hot water storage tank for storing hot water and a heating means for heating the hot water in the hot water storage tank, a hot water temperature for detecting the temperature of the hot water in the hot water storage tank. Detecting means, heating control means for controlling the heating means to maintain the temperature of the hot water in the hot water storage tank, and the heating control means are necessary for lowering the predetermined temperature when the heating means stops heating. The hysteresis temperature for turning on and off the heating operation of the heating means is determined by measuring the appropriate time.

[0006] According to the hot water storage type hot water equipment of claim 1,
The degree of change in the hot water temperature in the hot water storage tank is monitored by a hot water storage temperature sensor, and the temperature for combustion and heating is determined according to the degree of change. Thereby, on / off of combustion heating optimal for each hot water storage type hot water device is performed. According to the hot water storage type hot water device of the second aspect, the degree of change in the hot water temperature in the hot water storage tank is monitored by the hot water storage temperature sensor, and the temperature at which combustion is stopped during combustion heating is determined according to the change degree. I do. Thereby, on / off of combustion heating optimal for each hot water storage type hot water device is performed. According to the third aspect of the present invention, the degree of change of the hot water temperature in the hot water storage tank is monitored by the hot water storage temperature sensor, and the ON / OFF hysteresis temperature width of the combustion heating operation is determined according to the change degree. I do.
Thereby, on / off of combustion heating optimal for each hot water storage type hot water device is performed. According to the hot water storage type hot water appliance of the fourth aspect, the degree of change in the temperature of the hot water in the hot water storage tank is monitored by the hot water storage temperature sensor, and combustion heating is performed according to the degree of change in the temperature of the hot water in the hot water storage tank after the combustion is stopped. The on / off hysteresis temperature of the operation is determined. Thereby, on / off of combustion heating optimal for each hot water storage type hot water device is performed.
According to the hot water storage type hot water device of the fifth aspect, the degree of change in the hot water temperature in the hot water storage tank is monitored by the hot water storage temperature sensor, and it is necessary for the temperature of the hot water in the hot water storage tank to decrease by a predetermined temperature after the combustion is stopped. The time is measured to determine the on-off hysteresis temperature. Thereby, on / off of combustion heating optimal for each hot water storage type hot water device is performed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. As an example of the hot water storage type hot water equipment, a hot water storage type hot water supply device having a hot water supply function, a bath function and a heating function will be described. First, the hot water supply type hot water supply apparatus of FIG. 1 is a hot water supply type hot water supply apparatus of a type in which hot water for hot water supply is directly supplied from a hot water storage tank.

Reference numeral 10 denotes a hot water storage tank for storing hot water, which has a combustion chamber 11 below the hot water storage tank. On the hot water storage tank 10, an exhaust gas collecting chamber 12 is provided. A plurality of flue pipes 13 are communicated between the combustion chamber 11 and the exhaust gas collecting chamber 12, and high-temperature exhaust gas generated in the combustion chamber 11 is guided to the exhaust gas collecting chamber 12 through the flue pipe 13 and further out of the apparatus. Is discharged. The hot water in the hot water storage tank 10 is also heated by the exhaust gas passing through the smoke tube 13. Reference numeral 20 denotes a burner provided with a blower 21 and a nozzle 2
Liquid fuel is sprayed from 2 and burned in the combustion chamber 11.
Note that gas fuel may be used instead of the liquid fuel. The type of fuel and the manner of burning are not particularly limited.

The hot water storage tank 10 is provided with a hot water supply pipe 31, a hot water supply pipe 33, and a hot water supply pipe 34 as a hot water supply circuit. The water from the water inlet pipe 31 enters the hot water storage tank 10, where it is indirectly heat-exchanged with the hot water in the hot water storage tank 10 by the hot water supply heat exchange coil 32, heated and discharged through the hot water pipe 33, and further mixed with hot and cold water The water is mixed with the water supplied through the branch pipe 31a of the water inlet pipe 31 by the means 35 as required, and flows into the hot water supply pipe 34. The flow rate of the hot water flowing through the hot water supply pipe 34 is controlled by an overflow prevention flow controller 3 which is a flow control means.
6, the maximum possible flow rate (restricted flow rate) is adjusted. The hot water flowing through the hot water supply pipe 34 is supplied to hot water from a hot water supply curan or the like. Hot water is supplied to the bath tub through a hot water filling pipe 37 for the bath tub. The water inlet pipe 31 is provided with an incoming water temperature sensor 41 and an incoming water flow rate sensor 42. The hot water storage tank 10
Is provided with a hot water storage temperature sensor 43 for detecting the temperature of hot water in the hot water storage tank 10. The tapping pipe 33 is provided with a tapping temperature sensor 44 for detecting tapping temperature of hot water. Further, the hot water supply pipe 34 is provided with a hot water temperature sensor 45 for detecting a hot water temperature. In the hot water storage tank 10,
A bath pipe 51, a bath heating coil 52, and a bath return pipe 53 are connected as a bath reheating circuit. Further, a heating return circuit 61 and a heating going circuit 62 are connected as a heating circuit.

Reference numeral 70 denotes a controller, and reference numeral 80 denotes a remote controller. The controller 70 has a built-in microcomputer, obtains information from the sensors of the apparatus in accordance with a command from the remote controller 80, and issues a predetermined control command to each section of the apparatus in advance according to built-in software or the like.

Next, the hot water supply operation will be described. In the hot water supply operation, the hot water supplied from the hot water storage tank 10 is mixed by the hot water supplied from the hot water storage tank 10 with the hot water supplied from the water inlet pipe 31. The hot water is supplied from the hot water supply pipe 34 at a desired temperature set in advance. The hot and cold water mixing means 35 at the time of hot water supply includes an incoming water temperature sensor 41 of the incoming water pipe 31 and an incoming water flow rate sensor 4.
The mixing ratio of the hot and cold water mixing means 35 is determined based on the detection content of No. 2 and the detection content of the hot water storage temperature sensor 43 that detects the temperature of the hot water in the hot water storage tank 10. The mixing ratio of the hot and cold water mixing means 35 is feedback-controlled to the hot water supply pipe 34 based on the detection content of the hot water supply temperature sensor 45 for detecting the hot water supply temperature. At this time, the maximum possible flow rate (restricted flow rate) is adjusted by the overflow prevention flow rate regulator 36 in order to secure the amount of hot water that can be supplied at a desired temperature after mixing.

The operation of the bath function on the bath side is a reheating operation of the bathtub. When the temperature of the hot water in the bathtub is lowered or the hot water temperature is desired to be increased, the reheating operation is started and the circulation pump 54 is operated. Turn on the bath return pipe 51, bath heating coil 5
2. Hot water in the bathtub is circulated through the bath pipe 53, and at this time, heat is exchanged with hot water in the hot water storage tank 10 by the bath heating coil 52, and reheating is performed. When the hot water in the bath tub rises to a desired temperature, the circulation pump 54 stops, and the reheating operation ends. In the operation of the heating function on the heating side, hot water in the hot water storage tank 10 is sent from the heating outgoing pipe 62 to a heating terminal (not shown), and returned from the heating terminal to the heating return pipe 61 to perform heating. At this time, the hot water in the hot water storage tank 10
Once mixed with the hot water returned from the heating return pipe 61 in the mixing section 63, the temperature of the hot water is lowered to an appropriate temperature, and sent out to the heating terminal from the heating going pipe 62.

Next, the operation of heating the hot water in the hot water storage tank, which is a characteristic part of the present invention, will be described with reference to the flowchart of FIG. When the operation switch (not shown) is turned on (step S1), the operation of the hot water supply type hot water supply apparatus is started, and firstly, the detection temperature of the hot water storage temperature sensor 43 for detecting the temperature of the hot water in the hot water storage tank 10, and the combustion chamber. (Step S2), and if the detected temperature of the hot water storage temperature sensor 43 is lower, the combustion is started, and the hot water temperature in the hot water storage tank 10 is reduced. The heating is performed (step S3). As a result of the comparison between the detected temperature of the hot water storage temperature sensor 43 and the combustion stop temperature, when the detected temperature of the hot water storage temperature sensor 43 rises to the combustion stop temperature,
The combustion is temporarily stopped (step S4). Then, the detection temperature of the hot water storage temperature sensor 43 is monitored, and the time during which the detection temperature decreases by 0.5 degrees is measured (step S5). If the measured time is within a predetermined time (for example, one minute), the temperature of the hot water in the hot water storage tank is rapidly reduced, and thus the hot water in the hot water storage tank is immediately heated to a desired temperature. It needs to be maintained (step S6). Therefore, in order to increase the combustion start temperature, the combustion start temperature is set to the combustion stop temperature minus 0.5.
The degree is set (step S7). And hot water storage tank 1
It is determined whether or not the temperature within 0 has decreased to the combustion start temperature. If the temperature has not decreased, the state of stopping the combustion of the hot water in the hot water storage tank 10 is maintained. If the temperature has decreased, the process returns to step S2 and shifts to step S3. Then, the combustion is started again to start the combustion heating of the hot water in the hot water storage tank.

In step S6, hot water storage temperature sensor 4
As a result of monitoring the detected temperature of No. 3 and measuring the time when the detected temperature decreases by 0.5 degree, if the measured time takes a predetermined time (for example, 1 minute) or more, the hot water storage type hot water supply device 1 Since the temperature maintenance state of the hot water storage tank 10 is good and the degree of use is low, it is considered that the temperature accuracy required at present is not high. Therefore, there is no problem even if the interval between the combustion and the combustion stop is increased. -Set to 3 times (step S9). Thereby, the number of times of combustion on / off can be reduced.

Steps S6, S9, and S10 are repeated until the temperature of the hot water storage temperature sensor drops to the combustion start temperature. When the temperature drops to the combustion start temperature, the process returns to step S2, moves to step S3, and starts combustion. The hot water in the hot water storage tank 10 is heated. Step S
6, even when step S9 and step S10 are repeated, the hot water storage temperature sensor 43 monitors the temperature of the hot water in the hot water storage tank 10, and a temperature decrease of 0.5 ° C. for a predetermined time (for example, 1
If it occurs within minutes, the process proceeds to step S7, and the temperature of the hot water in the hot water storage tank 10 is accurately maintained with a hysteresis width of 0.5 degrees (steps S7 and S8). This is because it can be determined that the use of hot water supply or the like whose use has been stopped is used again and a control operation at a temperature with high accuracy is required.

Next, a modified example of the operation of FIG. 2 will be described with reference to FIG. In the operation shown in FIG. 3, steps S15 and S16 are different from those in FIG. In FIG.
When the operation switch (not shown) is turned on (step S11), the operation of the hot water supply type hot water supply apparatus is started, and firstly, the detected temperature of the hot water storage temperature sensor 43 for detecting the temperature of the hot water in the hot water storage tank and the temperature of the combustion chamber. (Step S12), and if the temperature detected by the hot water storage temperature sensor 43 is lower, the combustion is started.
The temperature of the hot water in the hot water storage tank 10 is increased by heating (step S
13). As a result of the comparison between the detected temperature of the hot water storage temperature sensor 43 and the combustion stop temperature, when the detected temperature of the hot water storage temperature sensor 43 rises to the combustion stop temperature, the combustion is temporarily stopped (step S14). Then, the temperature detected by the hot water storage temperature sensor 43 is monitored, and the temperature at which the hot water storage temperature decreases for a predetermined time (for example, one minute) is monitored (step S15). If the measured decrease temperature is equal to or higher than a predetermined temperature (for example, 0.4 ° C.), it is often used and the temperature of the hot water in the hot water storage tank rapidly decreases. It is necessary to maintain the hot water temperature at a desired temperature (step S1).
6). Therefore, in order to raise the combustion start temperature, the combustion start temperature is set to the combustion stop temperature minus 0.5 degrees (step S17). Then, it is determined whether or not the temperature in the hot water storage tank 10 has decreased to the combustion start temperature. If the temperature has not decreased, the state of stopping the combustion of the hot water in the hot water storage tank 10 is maintained. The process proceeds to S3, in which combustion is started again, and combustion heating of hot water in the hot water storage tank is started.

In step S16, the temperature detected by the hot water storage temperature sensor 43 is monitored, and the temperature that decreases during a predetermined time (for example, one minute) is monitored. Since the temperature maintenance state of the hot water storage tank 10 is good and the degree of use is low, it is considered that the temperature accuracy required at present is not high. Therefore, there is no problem even if the interval between the combustion and the combustion stop is large. The temperature is set to -3 degrees (step S19). Thereby, the number of times of combustion on / off can be reduced.

Steps S16 and S1 until the hot water storage temperature sensor 43 drops to the combustion start temperature.
9. Step S20 is repeated, and when the temperature has decreased to the combustion start temperature, the process returns to Step S12 and proceeds to Step S13.
The combustion is started to heat the hot water in the hot water storage tank 10. Step S16, step S19, step S20
Is repeated, the hot-water storage temperature sensor 43 monitors the hot-water temperature in the hot-water storage tank 10 for a predetermined time (for example, 1 to 1).
If the hot water storage temperature drops by 0.4 degrees or more within minutes, the process proceeds to step S17 and the temperature of the hot water in the hot water storage tank 10 is set to 0.
Maintain accuracy with a hysteresis width of 5 degrees (step S
17, S18). This is because it can be determined that the use of hot water supply or the like whose use has been stopped is used again and a control operation at a temperature with high accuracy is required.

Next, another embodiment of the hot water apparatus to which the present invention is applied will be described. FIG. 4 shows another type of hot water storage type hot water equipment. Unlike the hot water supply type hot water supply device 1 shown in FIG. 1, this hot water supply type hot water device does not have a heating function, has a hot water supply function and a bath function, uses the hot water storage as it is on the hot water supply side, and uses the hot water storage on the bath side. Indirect heating type. The numbers common to FIG. 1 are assigned the same numbers. The configuration includes a hot water supply circuit 31, 33, 34 for performing a hot water supply function, a bath circuit 51, 52, 53 for performing a bath function for a main body portion having a hot water storage tank 10 and a combustion chamber 11, and these components. And a remote controller 80 for remotely controlling these various functions.

First, the hot water supply operation will be described. Water inlet 3
The water that has entered from 1 is branched, and a part is
The hot water is supplied from the hot-water storage tank 10 to the hot-water mixing means 35 through the tapping pipe 33. On the other hand, the other water branched from the water inlet pipe 31 directly reaches the hot water mixing means 35,
The hot water pipe 3 is mixed at the hot water setting temperature by the hot water mixing means 35.
The hot water is supplied at 4, or the hot water is poured into the bathtub at the bathing temperature by the hot water pipe 37.

Next, the operation of the bath function will be described.
At the time of reheating of the bath, the circulation pump 54 of the bath circuit is driven to return hot water from the bathtub to the return pipe 51, the bath heating coil 52,
Circulates through the outgoing pipe 53, and the bath heating coil 5
By 2, the hot water in the hot water storage tank 10 is heated by indirect heating to reheat the hot water in the bathtub. Then, the temperature control of the hot water in the hot water storage tank is performed by the operation shown in FIG. 2 or the operation of FIG. 3 shown as a modification thereof, and the hysteresis of on / off of the combustion heating is determined according to the use state of the hot water equipment. By changing this, appropriate combustion on / off control is performed.

Next, another embodiment of the hot water appliance to which the present invention is applied will be described. FIG. 5 shows another type of hot-water storage type hot water appliance according to the third embodiment. This hot water supply type hot water supply device is a single-function hot water supply type hot water supply device having only a hot water supply function unlike the hot water supply type hot water supply device 1 shown in FIG. The numbers common to FIG. 1 are assigned the same numbers. Its configuration is a hot water storage tank 1
0, a hot water supply circuit 31, 34 for performing a hot water supply function for the main body portion having the combustion chamber 11, and a controller 70 for controlling the function and operation.

First, the hot water supply operation will be described. In the hot water supply operation, hot water in the hot water storage tank 10 is directly supplied through the hot water pipe 34. Then, the hot water stored in the hot water storage tank 10 is maintained by replenishing the reduced hot water in the hot water storage tank 10 with water from the water supply pipe 31. The reduced hot water temperature in the hot water storage tank 10 due to the replenishment of water is heated by heating and burning in the combustion chamber 11. Then, the temperature control of the hot water in the hot water storage tank 10 is performed by the operation shown in FIG. 2 or the operation of FIG. 3 shown as a modified example thereof. By changing the hysteresis of combustion heating on / off according to the usage condition of this water heater,
Perform appropriate combustion on / off control. The temperature control of the hot water in the hot water storage tank is performed by the operation shown in FIG. 2 or the operation shown as a modified example thereof. Appropriate combustion on / off control is performed by changing the on / off hysteresis of combustion heating in accordance with the usage state of the hot water appliance. 4 and 5
In the case of the hot water supply type hot water supply device shown in FIG. 1, the hot water in the hot water storage tank 10 is directly supplied with hot water, so that the combustion on / off operation of the present invention is particularly effective. That is, when hot water is being used, the hot water in the hot water storage tank 10 is directly supplied. Therefore, it is highly necessary to maintain the temperature of the hot water in the hot water storage tank 10 more accurately. 31
, Water in the hot water storage tank 10 decreases in a shorter time. Therefore, the change of the hot water temperature in the hot water storage tank 10 (in this case, a decrease) is monitored, and when the change of the hot water temperature is large, the hysteresis width of the on / off of the heating and combustion is reduced, so that the hot water storage tank 10 The temperature of the hot water inside is accurately maintained.

In the above embodiment, in steps S7 and S9 in FIG. 2 and steps S17 and S19 in FIG.
Although only the combustion start temperature is determined, it goes without saying that both the combustion start temperature and the combustion stop temperature may be determined and changed. In the above embodiment, steps S7 and S9 in FIG. 2 and step S1 in FIG.
7. In S19, only the combustion start temperature is determined, but the combustion stop temperature is determined and changed,
The combustion start temperature may be fixed. In this case, the combustion start temperature is previously set to a predetermined temperature (for example, 80 degrees).
The temperature which drops during a predetermined time is monitored. If the temperature drops below a predetermined temperature, the combustion stop temperature is set to a predetermined temperature close to the combustion start temperature (for example, 80.5 degrees). If it is small, the temperature may be set to a predetermined temperature (for example, 82 degrees) which is lower than the combustion start temperature. As described above, the setting of the combustion start temperature, the setting of the combustion stop temperature, or the method of taking the hysteresis may be appropriately selected and adopted depending on the type of various types of hot water equipment, and the various temperatures shown in the above embodiment are examples. It is not limited to these.

[0025]

As described above, according to the hot water storage type hot water device of the first aspect, the degree of change in the hot water temperature in the hot water storage tank is monitored by the hot water storage temperature sensor, and combustion heating is performed according to the change degree. Be sure to determine the temperature at which to run. Thus, there is an effect that the combustion heating can be turned on / off optimally for each hot water storage type hot water appliance. According to the hot water storage type hot water device of the second aspect, the degree of change in the hot water temperature in the hot water storage tank is monitored by the hot water storage temperature sensor, and the temperature at which combustion is stopped during combustion heating is determined according to the change degree. I do.
Thus, there is an effect that the combustion heating can be turned on / off optimally for each hot water storage type hot water appliance. According to the third aspect of the present invention, the degree of change of the hot water temperature in the hot water storage tank is monitored by the hot water storage temperature sensor, and the on / off hysteresis temperature of the combustion heating operation is determined according to the change degree. . Thus, there is an effect that the combustion heating can be turned on / off optimally for each hot water storage type hot water appliance. According to the hot water storage type hot water device of claim 4, the degree of change of the hot water temperature in the hot water storage tank is monitored by the hot water storage temperature sensor,
The on / off hysteresis temperature of the combustion heating operation is determined according to the degree of change in the temperature of the hot water in the hot water storage tank after the combustion is stopped. Thus, there is an effect that the combustion heating can be turned on / off optimally for each hot water storage type hot water appliance. According to the hot water storage type hot water device of the fifth aspect, the degree of change in the hot water temperature in the hot water storage tank is monitored by the hot water storage temperature sensor, and it is necessary for the temperature of the hot water in the hot water storage tank to decrease by a predetermined temperature after the combustion is stopped. The time is measured to determine the on-off hysteresis temperature. Thus, there is an effect that the combustion heating can be turned on / off optimally for each hot water storage type hot water appliance.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a hot water storage type hot water device of the present invention.

FIG. 2 is a flowchart showing the operation of the present invention.

FIG. 3 is a flowchart showing another operation.

FIG. 4 is an explanatory diagram of another hot water storage type hot water device.

FIG. 5 is an explanatory view of another hot water storage type hot water appliance.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot water storage type hot water equipment 10 Hot water storage tank 11 Combustion chamber 12 Exhaust gas collecting cylinder 13 Smoke tube 20 Burner 43 Hot water storage temperature sensor 45 Hot water supply temperature sensor 70 Controller 80 Remote control

Claims (5)

[Claims] A hot water storage device comprising a hot water storage tank for storing hot water and heating means for heating the hot water in the hot water storage tank, a hot water temperature detecting means for detecting a hot water temperature in the hot water storage tank,
Heating control means for controlling the heating means in order to maintain the temperature of the hot water in the hot water storage tank, and the heating control means determines the temperature at which the heating means is reheated by the degree of change in the temperature detected by the hot water storage tank temperature sensor. Hot water storage type hot water equipment characterized by being determined. 2. A hot water storage type hot water device comprising a hot water storage tank for storing hot water and heating means for heating the hot water in the hot water storage tank, a hot water temperature detecting means for detecting a hot water temperature in the hot water storage tank,
Heating control means for controlling the heating means to maintain the temperature of the hot water in the hot water storage tank, and the heating control means determines the temperature at which the heating means stops heating by the degree of change in the temperature detected by the hot water storage tank temperature sensor. Hot water storage type hot water equipment characterized by being determined. 3. A hot water storage type hot water device comprising a hot water storage tank for storing hot water and heating means for heating the hot water in the hot water storage tank, a hot water temperature detecting means for detecting a hot water temperature in the hot water storage tank,
A heating control means for controlling the heating means to maintain the hot water temperature in the hot water storage tank; and the heating control means turns on and off an operation of heating by the heating means according to a degree of change in temperature detected by the hot water storage tank temperature sensor. A hot-water storage type hot water device characterized by determining a hysteresis temperature width to perform. 4. A hot water storage type hot water device comprising a hot water storage tank for storing hot water and heating means for heating the hot water in the hot water storage tank, a hot water temperature detecting means for detecting a hot water temperature in the hot water storage tank,
Heating control means for controlling the heating means to maintain the temperature of the hot water in the hot water storage tank; and the heating control means measures a temperature which decreases during a predetermined time when the heating means stops heating. Determining a hysteresis temperature at which the heating means turns on and off the heating operation. 5. A hot water storage type hot water device comprising a hot water storage tank for storing hot water and heating means for heating the hot water in the hot water storage tank, a hot water temperature detecting means for detecting a hot water temperature in the hot water storage tank,
A heating control means for controlling the heating means to maintain the hot water temperature in the hot water storage tank; and the heating control means measures a time required for a predetermined temperature decrease when the heating means stops heating. Thereby determining a hysteresis temperature at which the heating means turns on and off the heating operation.