JP5322532B2 - Hot water heating method - Google Patents

Description

The present invention relates to a warm water heating method, and more particularly to a warm water heating method in which warm water in a warm water tank is heated by a heat medium heated by a solar heat collector.

A heat exchanger provided in the hot water tank is connected to a solar heat collector that heats the heat medium, and the heat medium heated by the solar heat collector is circulated between the solar heat collector and the heat exchanger. When heating the hot water in the hot water tank, a temperature detector for measuring the temperature of the heating medium is attached to the solar heat collector. Here, the solar heat collector is usually installed on the roof of a building, so maintenance work such as inspection, repair, and replacement of the temperature detector becomes troublesome, and the temperature detector is used for extraneous noise such as lightning. There is a problem that it is easily affected by. Thus, it has been proposed to provide a temperature detector for measuring the temperature of the heat medium in a heat medium supply pipe that supplies the heat medium from the solar heat collector to the heat exchanger (see, for example, Patent Document 1).

JP 2004-44952 A

However, in the invention described in Patent Document 1, since the temperature detector is installed at a location away from the solar heat collector, it is provided in the heat medium return pipe that returns the heat medium from the heat exchanger to the solar heat collector. The circulating pump is operated to circulate the heat medium between the solar collector and the heat exchanger, the temperature of the heating medium heated by the solar collector is measured by the temperature detector, and the solar collector is used. It must be determined whether or not the hot water in the hot water tank can be heated with the heated heat medium. Here, the determination of whether or not the hot water in the hot water tank can be heated by the heat medium is performed by, for example, simply operating the circulation pump periodically using a timer, and therefore the influence of seasonal changes and weather changes is taken into consideration. Even when the possibility of heating the hot water in the hot water tank by the heat medium is low, whether or not the hot water can be heated is determined. As a result, a wasteful heat recovery operation in which the heat medium is circulated between the solar heat collector and the heat exchanger is performed, resulting in a problem that energy saving is reduced.
In addition, by changing the setting of the timer in response to seasonal changes and weather changes, it is possible to determine whether hot water heating is possible or not when the hot water heating possibility is high, but the timer setting change It must be done frequently and is not realistic.

The present invention has been made in view of such circumstances, and only when the hot water in the hot water tank can be heated with the heat medium heated by the solar heat collector, the heat medium is exchanged between the solar heat collector and the heat exchanger. It aims at providing the warm water heating method which can be circulated between and can perform efficient heat recovery.

The hot water heating method according to the first aspect of the present invention is a heat exchanger (heat exchange section, coil) provided in a hot water tank through which a heat medium passes and a solar heat collector that heats the heat medium with solar heat. In the hot water heating method of heating the hot water in the hot water tank by circulating a heating medium heated by the solar heat collector between the solar heat collector and the heat exchanger,
A continuous heat collection judgment time zone including a time zone in which the heat collection operation in which the hot water in the hot water tank is heated with the heat medium heated by the solar heat collector is possible, and in the heat collection judgment time zone, When the heat collecting operation is stopped, it is determined whether or not the heat collecting operation can be performed at regular intervals, and when it is determined that the heat collecting operation is possible, the heat medium heated by the solar heat collector is heated. is circulated between the exchanger and the solar heat collector have row hot water heating in the hot water tank,
Before the heat collection operation is actually performed in the heat collection determination time zone, the heat collection start actual time which is the earliest time at which the heat collection operation is started and the heat collection operation are performed over a plurality of days. A heat collection end result time that is the latest end time is obtained, and a time earlier by a predetermined time from the earliest time among the heat collection start result times is set as a heat collection determination start time, and the heat collection end result time The time later than the latest time by the predetermined time is set as the heat collection determination end time, and the time from the heat collection determination start time to the heat collection determination end time is set in advance as the heat collection determination time zone,
When the time earlier by the predetermined time from the earliest time in the heat collection start actual time is earlier than 6:00 am, the heat collection determination start time is 6:00 am, the earliest among the heat collection start actual times. If the time earlier than the time by 10 am is later than 10:00 am, the heat collection determination start time is 10:00 am, and the time later by the predetermined time from the latest heat collection end time is If it is later than 6 o'clock, the heat collection determination end time is 6 pm, and if the time later by the predetermined time is earlier than 2 pm from the latest time among the heat collection end performance times, the heat collection determination ends. Set the time to 2pm each .

By setting a time earlier by a predetermined time (for example, 10 minutes or more and 30 minutes or less) from the earliest time among the heat collection start actual times as the heat collection determination start time, By setting the time later than a later time by a predetermined time (for example, 10 minutes or more and 30 minutes or less) as the heat collection determination end time, the heat collection operation is surely started in a time zone in which the heat collection operation was possible. Can do.

By setting the heat collection determination start time as early as 6:00 am and as late as 10 am, the heat collection determination end time as early as 2:00 pm and as late as 6:00 pm, the solar heat collector can receive sunlight. It is possible to set a time zone where there is a high possibility of being reliably hit as the heat collection determination time zone.

A hot water heating method according to a second aspect of the present invention that connects the heat exchanger provided in the hot water tank and through which the heat medium passes and a solar heat collector that heats the heat medium with solar heat, In the hot water heating method of heating the hot water in the hot water tank by circulating the heating medium heated by the solar heat collector between the solar heat collector and the heat exchanger,
A continuous heat collection judgment time zone including a time zone in which the heat collection operation in which the hot water in the hot water tank is heated with the heat medium heated by the solar heat collector is possible, and in the heat collection judgment time zone, When the heat collecting operation is stopped, it is determined whether or not the heat collecting operation can be performed at regular intervals, and when it is determined that the heat collecting operation is possible, the heat medium heated by the solar heat collector is heated. Circulating between the exchanger and the solar heat collector to heat the hot water in the hot water tank,
Before the heat collection operation is actually performed in the heat collection determination time zone, the heat collection start actual time which is the earliest time at which the heat collection operation is started and the heat collection operation are performed over a plurality of days. A heat collection end result time that is the latest end time is obtained, and a time earlier by a predetermined time from the earliest time among the heat collection start result times is set as a heat collection determination start time, and the heat collection end result time The time later than the latest time by the predetermined time is set as the heat collection determination end time, and the time from the heat collection determination start time to the heat collection determination end time is set in advance as the heat collection determination time zone,
When the time earlier than the predetermined time A is earlier than the earliest time among the heat collection start actual times, the heat collection determination start time is set to the predetermined time A and the heat collection start actual time is When the time earlier than the earliest time by the predetermined time is later than the predetermined time B, which is a time later than the predetermined time A, the heat collection determination start time is set to the predetermined time B, and the heat collection end result time When the time later than the latest time by the predetermined time is later than the predetermined time C, the heat collection determination end time is set to the predetermined time C, and the heat collection end result time is further from the latest time by the predetermined time. When the later time is earlier than the predetermined time D that is earlier than the predetermined time C, the heat collection determination end time is set to the predetermined time D, respectively.
In the hot water heating method according to the first and second inventions, when the heat collection operation is actually performed in the heat collection determination time zone, it is determined that the heat collection operation is not possible, and the time is the heat collection determination. When the end time has passed, the heat collection start result time is set as a new heat collection start result time, and the heat collection end result time is set as a new heat collection end result time. The oldest heat collection start performance time is deleted from the start performance time, and the new heat collection start performance time is added to form a heat collection start performance time group. The oldest heat collection end time is deleted from the new heat collection end result time to form a heat collection end result time group, and the predetermined time is further counted from the earliest time in the heat collection start result time group. A new heat collection in the heat collection judgment time zone that is earlier by the time Constant start time, it is preferable to further slow time for the predetermined time period from the latest time in the heat collecting finished actual time group is set as a new heat collecting determining the end time of the heat collector determined time zone.

In the hot water heating method according to the first and second inventions, a heat medium feed pipe for sending a heat medium heated by the solar heat collector to the heat exchanger, and a pump, the heat medium being provided with the heat medium. A bypass passage communicating with a portion upstream of the pump of the heat medium return pipe is connected to the heat medium feed pipe via a three-way valve, and the solar heat is supplied from the three-way valve. A state where a heat medium temperature detector for measuring the temperature of the heat medium is installed on the heat collector side, and the three-way valve is operated to connect the heat medium feed pipe and the heat medium return pipe via the bypass path. The temperature of the heating medium is measured by the heating medium temperature detector while the pump is operated to flow the heating medium, and the temperature of the hot water is measured by the hot water temperature detector provided in the hot water tank. If the temperature difference of hot water is 5 ° C or more, the heat collection operation is deemed acceptable. It is preferable to.
If the difference between the temperature of the heating medium heated by the solar heat collector and the hot water is 5 ° C. or higher, preferably 7 ° C. or higher, the hot water can be efficiently heated by the heating medium. The heat collection operation was made possible when the difference in temperature was 5 ° C or higher, preferably 7 ° C or higher.

In the hot water heating method according to the first and second inventions, when it is determined that the heat collecting operation is possible, the three-way valve is operated to supply a heat medium to the heat exchanger via the heat medium feed pipe. And when it determines with the said heat collection operation being no, it is preferable to maintain the communication state of the said heat-medium feed piping and the said heat-medium return piping via the said bypass path.

In the hot water heating method according to the first and second inventions, when it is determined that the heat collection operation is possible in the heat collection determination time zone, a heat medium is circulated between the solar heat collector and the heat exchanger. Since the hot water in the hot water tank is heated, a wasteful heat recovery operation can be prevented, efficient heat recovery can be performed, and energy saving can be improved.

In the hot water heating method according to the first and second inventions, the actual heat collection start time and the heat collection end actual time obtained over a plurality of days before the heat collection operation is actually performed in the heat collection determination time zone. Therefore, the heat collection determination time zone can be set to a time zone with a high possibility of heat collection operation.
Here, 6 am at the earliest the heat collection determination start time, at 10 o'clock at the latest the morning, 2:00 in the afternoon and early collector determination end time, when even late set at 6:00 pm, sunshine can be expected The heat collection determination time zone can be set in the time zone, and when the heat collection operation cannot be performed, the useless heat recovery operation can be immediately terminated. In addition, by setting the actual heat collection start time to 10:00 am at the latest, even if rainy or cloudy days continue for days when heat collection operation is not possible, it is possible to heat the hot water in the hot water tank when it clears The heat collection operation can be performed at a high time. Since it is determined whether or not the heat collecting operation can be performed at 2 pm, which is a time when the hot water in the hot water tank is likely to be heated, a wasteful heat recovery operation is performed when the possibility of heating the hot water in the hot water tank is low. Can be prevented.

Further, when the heat collection operation is actually performed in the heat collection determination time zone, when it is determined that the heat collection operation is not performed, and the time has passed the heat collection determination end time, a new heat collection start actual time and calculated collector End actual time each newly by setting the heat collecting judgment start time and the heat collecting determined end time, respectively, sets an optimum heat collecting judgment time period in consideration of the recent weather conditions on the basis of this it can.

In the hot water heating method according to the first and second inventions, the temperature of the heating medium is detected while flowing the heating medium heated by the solar heat collector from the heating medium feed pipe to the heating medium return pipe through the bypass path. In the case of measuring with a heater, it is possible to prevent the wasteful heat recovery operation of circulating the heat medium between the solar heat collector and the heat exchanger, and to determine whether or not the heat collection operation is possible.
Then, only if the heat collecting operation is determined Yes, that heat medium is supplied to the heat exchanger from the solar heat collector, it is possible to perform the hot water heating in the hot water tank efficiently.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is an explanatory view of a hot water heating apparatus to which a hot water heating method according to an embodiment of the present invention is applied, FIG. 2 is a flowchart showing the same hot water heating method, and FIGS. 3 and 4 are the same hot water heating method. FIG. 5 is a flowchart of the heat collection operation in the same hot water heating method.

As shown in FIG. 1, a hot water heating apparatus 10 to which a hot water heating method according to an embodiment of the present invention is applied includes a hot water tank 11 and an antifreeze liquid that is provided in the hot water tank 11 and is an example of a heat medium. Has a heat exchanger 12 that passes through and a solar heat collector 13 that heats the antifreeze with solar heat. Further, the hot water heating device 10 is connected to a heat medium feed pipe 17 provided in the heat exchanger 12, and collects the antifreeze liquid heated by the solar heat collector 13 from the solar heat collector 13 to the heat exchanger 12. A collector-side heat medium return pipe 15 connected to the side heat medium feed pipe 14 and a heat medium return pipe 19 provided in the heat exchanger 12 to return the antifreeze liquid from the heat exchanger 12 to the solar heat collector 13; A solar pump (an example of a pump) 18 that is provided in the heat medium return pipe 19 and circulates the antifreeze liquid between the heat exchanger 12 and the solar heat collector 13 and an antifreeze liquid provided in the heat collector side heat medium return pipe 15. And an expansion tank (not shown) that absorbs the volume change due to the expansion and contraction due to the heat. Furthermore, the hot water heating device 10 performs the heat collection operation in the heat collection determination time zone set as the time zone in which the heat collection operation for heating the hot water in the hot water tank 11 with the antifreeze liquid heated by the solar heat collector 13 is possible. When stopping, it is determined whether or not the heat collecting operation is possible every certain time (for example, 15 minutes), and the antifreeze heated by the solar heat collector 13 is converted into a heat exchanger only when it is determined that the heat collecting operation is possible. 12 and a control means 16 for heating the hot water in the hot water tank 11 by circulating between the solar heat collector 13 and the solar heat collector 13.

One end side of the bypass path 20 is connected to a portion of the heat medium return pipe 19 upstream of the solar pump 18, and the other end side of the bypass path 20 is connected to the heat medium feed pipe 17 via a three-way valve 21. In the heat medium feed pipe 17, an example of a heat medium temperature detector that measures the temperature of the antifreeze liquid sent from the solar heat collector 13 to the solar heat collector 13 side from the portion where the three-way valve 21 is attached. A heat medium outlet side thermistor 22 is installed, and in the heat medium return pipe 19, an example of a heat medium temperature detector that measures the temperature of the antifreeze liquid returning to the solar heat collector 13 is located downstream of the solar pump 18. A certain heat transfer medium thermistor 23 is installed. Here, a water supply pipe 24 for supplying water into the hot water tank 11 is connected to the lower end of the hot water tank 11, and a hot water extraction pipe 25 for taking out hot water from the hot water tank 11 is connected to the upper end of the hot water tank 11. ing. The heat exchanger 12 is arranged on the lower side in the hot water tank 11, and a lower hot water thermistor 26 for measuring the temperature of the hot water near the heat exchanger 12 is provided in the lower part of the hot water tank 11. Further, the heat medium outlet side thermistor 22, the heat medium inlet side thermistor 23, and the lower warm water thermistor 26 are connected to the control means 16, and the on / off of the solar pump 18 and the valve switching operation of the three-way valve 21 are performed from the control means 16. This is done by a control signal.

The control means 16 measures the current time, and when the current time is in the preset heat collection determination time zone, when the heat collection operation is stopped, the solar pump 18 is turned on at regular intervals, The antifreeze heated by the solar heat collector 13 is transferred from the solar heat collector 13 to the collector side heat medium feed pipe 14, a part of the heat medium feed pipe 17, the three-way valve 21, the bypass path 20, and the heat medium return pipe 19. The temperature of the antifreeze liquid is measured by the heat medium outlet side thermistor 22 provided in the heat medium feed pipe 17 while circulating a part and the heat collector side heat medium return pipe 15 using the path, and is provided in the hot water tank 11. The difference between the temperature of the warm water in the warm water tank 11 measured by the lower warm water thermistor 26 is determined, and when the temperature difference is 5 ° C. or more, it is determined that the heat collecting operation is possible, and the temperature difference is less than 5 ° C. It has the 1st function judged as heat collection operation failure. Further, when the control means 16 determines that the heat collecting operation is possible, the control means 16 operates the three-way valve 21 to bring the bypass passage 20 and the heat medium feed pipe 17 into a non-communication state, and the antifreeze liquid is passed through the heat medium feed pipe 17. When the heat exchanger 12 is supplied and it is determined that the heat collecting operation is rejected, it has a second function of maintaining the communication state between the bypass 20 and the heat transfer pipe 17 and turning off the solar pump 18. . The control means 16 can be formed, for example, by mounting a program that develops the first and second functions on a microcomputer.

Then, the warm water heating method which concerns on one embodiment of this invention is demonstrated.
As shown in FIG. 2, a hot water heating method according to an embodiment of the present invention includes a heat exchanger 12 provided in a hot water tank 11 through which antifreeze liquid passes and a solar heat collector 13 that heats the antifreeze liquid by solar heat. And the antifreeze heated by the solar heat collector 13 is circulated between the solar heat collector 13 and the heat exchanger 12 to heat the hot water in the hot water tank 11 and heated by the solar heat collector 13. When the heat collection operation time zone in which the hot water in the hot water tank 11 is heated with the antifreeze liquid is set as the heat collection judgment time zone and the current time is in the heat collection judgment time zone, the heat collection operation is stopped In addition, it is determined whether or not the heat collection operation is possible at regular intervals, and if it is determined that the heat collection operation is possible, the antifreeze heated by the solar heat collector 13 is transferred between the heat exchanger 12 and the solar heat collector 13. The hot water in the hot water tank 11 is heated by circulating in If the operation is determined to not and does not circulate antifreeze between the bypass passage 20 and the heat medium feed to maintain the communication with the pipe 17 heat exchanger 12 and the solar heat collector 13. Details will be described below.

First, before the heat collection operation is actually performed in the heat collection determination time zone, the hot water tank 11 is made of antifreeze heated by the solar heat collector 13 over a plurality of preset days (for example, seven days). The actual heat collection start time is obtained by respectively obtaining the actual heat collection start time that is the earliest time at which the heat collection operation for heating the hot water is completed and the latest heat collection end time that is the latest time at which the heat collection operation ends. The time that is earlier than the earliest time by a predetermined time (10 minutes to 30 minutes, for example, 15 minutes) is set as the heat collection determination start time, and is further predetermined from the latest heat collection end time. A heat collection determination time zone is set with a time (10 minutes to 30 minutes, for example, 15 minutes) later as the heat collection determination end time (S1). Hereinafter, the determination of the heat collection determination time zone will be described with reference to FIGS. 3 and 4.

First, in the range from 6:00 am to 6:00 pm, for example, a time zone from 7:00 am to 5:00 pm is set as an initial heat collection determination time zone (S1-1). Then, the time is confirmed by the control device 16 (S1-2), and when the current time reaches the initial heat collection determination start time (that is, 7:00 am), the solar pump 18 is turned on (S1-3). If the current time is before the initial heat collection determination start time, the process waits until the initial heat collection determination start time is reached. The solar pump 18 is turned on, and the antifreeze liquid in the solar heat collector 13 is removed from the collector side heat medium feed pipe 14, a part of the heat medium feed pipe 17, the three-way valve 21, the bypass path 20, and the heat medium return pipe 19. And a time required for the antifreeze liquid heated by the solar heat collector 13 to reach the heat medium outlet side thermistor 22 (circulation time). (S1-4), the temperature of the antifreeze liquid is measured by the heat medium outlet side thermistor 22, and the temperature difference from the temperature of the hot water in the hot water tank 11 measured by the lower hot water thermistor 26 is 5 ° C. or more. Is determined to be capable of collecting heat (S1-5).

When the control device 16 determines that the heat collecting operation is possible, the control device 16 sets the three-way valve 21 to the hot water tank 11 side (that is, the bypass passage 20 and the heat medium feed pipe 17 are not in communication) to heat the antifreeze liquid. While supplying to the heat exchanger 12 via the medium feed piping 17, the time at this time is memorize | stored as heat collection start performance time (S1-6). As a result, the antifreeze liquid heated by the solar heat collector 13 is always supplied to the heat exchanger 12, and the hot water in the hot water tank 11 is heated by the antifreeze liquid via the heat exchanger 12. It becomes a state. During the heat collecting operation, the control device 16 constantly checks whether or not the temperature difference between the antifreeze liquid temperature and the hot water temperature in the hot water tank 11 is 5 ° C. or more. When the temperature difference becomes less than 5 ° C., the control device 16 determines that the heat collection operation is not possible (S1-7), and stores the time when it is determined that the heat collection operation is impossible as the heat collection end result time (S1-8). The three-way valve 21 is set to the bypass path 20 side (that is, the bypass path 20 and the heat medium feed pipe 17 are in communication), and the solar pump 18 is stopped (S1-9). If the controller 16 determines that the heat collecting operation is not performed after the circulation time has elapsed (S1-5), the three-way valve 21 is maintained in the state of the bypass path 20 (that is, the bypass path 20 and the heat medium). The communication state of the feed pipe 17 is maintained), and the solar pump 18 stops (S1-9).

The control device 16 then reaches the initial heat collection determination end time in the initial heat collection determination time zone after the standby time corresponding to a certain time has elapsed since the solar pump 18 was stopped (S1-10). (S1-11), if the current time has not reached the initial heat collection determination end time, the solar pump 18 is turned on (S1-3) to determine whether or not the heat collection operation is possible The above procedure is repeated (S1-3 to S1-11). When the current time has reached the initial heat collection determination end time, the control device 16 determines whether or not the heat collection operation has been determined over a preset number of days (S1-12). If the thermal operation availability determination has not been performed over the set number of days, the heat collection operation availability determination is repeated until the set number of days is reached (S1-2 to S1-12). When the determination of whether or not the heat collection operation is possible is performed over the set number of days, the earliest heat collection start actual time among the stored heat collection start actual times is the initial heat collection determination start time (7:00 am). It is determined whether it is between the time when the standby time (for example, t minutes) is added to the initial heat collection determination start time (7: t am, hereinafter referred to as change determination time) (S1-13), and the earliest heat collection It is determined whether the start actual time is earlier than the change determination time and the latest heat collection end actual time among the stored heat collection end actual times is later than the initial heat collection determination end time (5 pm) (S1- 14) When the latest heat collection end time is later than the initial heat collection determination end time, a predetermined time, for example, 30 minutes earlier than the earliest heat collection start time is reset as the initial heat collection determination start time, A predetermined time from the latest heat collection end time, for example, 30 minutes slow time to re-set to the initial heat collecting determination end time (S1-15).

If the earliest heat collection start time is later than the change determination time and the latest heat collection end time is later than the initial heat collection determination end time (S1-16), the initial heat collection determination start time should be changed. First, a time that is 30 minutes later than the latest heat collection end result time is reset as the initial heat collection determination end time (S1-17). On the other hand, when the earliest heat collection start time is later than the change determination time (S1-13) and the latest heat collection end result time is earlier than the initial heat collection determination end time (S1-16), the initial heat collection determination start time. The initial heat collection determination end time is not changed. Furthermore, when the earliest heat collection start result time is earlier than the change determination time (S1-13) and the latest heat collection end result time is earlier than the initial heat collection determination end time (S1-14), the earliest heat collection start result A predetermined time, for example, 30 minutes earlier than the time is reset as the initial heat collection determination start time (S1-18), and the initial heat collection determination end time is not changed.

Then, the initial heat collection determination start time is set to the heat collection determination start time of the heat collection determination time zone when performing the heat collection operation, and the initial heat collection determination end time is collected to the heat collection determination time zone when performing the heat collection operation. The heat determination end time is set (S1-19). When the heat collection determination start time is earlier than 6:00 am, the heat collection determination start time is set to 6:00 am, and when the heat collection determination start time is later than 10 am, the heat collection determination start time is set to 10:00 am. Further, when the heat collection determination end time is later than 6:00 pm, the heat collection determination end time is set to 6:00 pm, and when the heat collection determination end time is earlier than 2:00 pm, the heat collection determination end time is set to 2:00 pm.

As shown in FIGS. 2 and 5, when the heat collection determination time zone is determined and the heat collection operation is actually performed (S2), the control device 16 always checks the time and the current time is the heat collection determination time zone. When the heat collection determination start time is reached (S2-1), the solar pump 18 is turned on (S2-2). The solar pump 18 is turned on, and the antifreeze liquid in the solar heat collector 13 is removed from the heat collector side heat medium feed pipe 14, a part of the heat medium feed pipe 17, the three-way valve 21, the bypass path 20, and the heat medium return pipe 19. And the circulation time required for the antifreeze liquid heated by the solar heat collector 13 to reach the heat medium outlet side thermistor 22 is circulated using a part of the heat collector side heat medium return pipe 15. (S2-3), the temperature of the antifreeze liquid is measured by the heat medium outlet side thermistor 22, and it is determined whether the temperature difference with the temperature of the warm water in the warm water tank 11 measured by the lower warm water thermistor 26 is 5 ° C. or more. When the temperature difference is 5 ° C. or more, it is determined that the heat collection operation is possible (S2-4).

When it is determined by the control device 16 that the heat collecting operation is possible, the control device 16 sets the three-way valve 21 to the hot water tank 11 side, makes the bypass passage 20 and the heat medium feed pipe 17 in a non-communication state, and supplies the antifreeze liquid to the heat medium feed pipe. It supplies to the heat exchanger 12 through 17, and memorize | stores the time at this time as heat collection start performance time (S2-5). As a result, the antifreeze liquid heated by the solar heat collector 13 is supplied to the heat exchanger 12, and the hot water in the hot water tank 11 is heated by the antifreeze liquid via the heat exchanger 12. During the heat collecting operation, the control device 16 constantly checks whether or not the temperature difference between the antifreeze liquid temperature and the hot water temperature in the hot water tank 11 is 5 ° C. or more. When the temperature difference becomes less than 5 ° C., the control device 16 determines that the heat collection operation is not possible (S2-6), and stores the time when it is determined that the heat collection operation is impossible as the heat collection end result time (S2-7). Then, the three-way valve 21 is set to the bypass path 20 side so that the bypass path 20 and the heat medium feed pipe 17 are in communication with each other, and the solar pump 18 is stopped (S2-8). When the control device 16 determines that the heat collecting operation is not performed after the circulation time has elapsed (S2-4), the three-way valve 21 is maintained in the state on the bypass path 20 side (that is, the bypass path 20 and the heat medium feed pipe). 17 is maintained), the solar pump 18 is stopped (S2-8).

Then, after the standby time corresponding to a certain time has elapsed after the solar pump 18 is stopped (S2-9), the control device 16 has reached the heat collection determination end time in the heat collection determination time zone. (S2-10) If the current time has not reached the heat collection determination end time, the solar pump 18 is turned on (S2-2), and the above procedure for determining whether or not the heat collection operation is possible is performed. Repeat (S2-2 to S2-10). On the other hand, when it is determined that the heat collection operation is not performed and the time has passed the heat collection determination end time (S2-10), the heat collection start record time is set to the new heat collection start record time, the heat collection end record time. Are set as new heat collection end time.

Next, as shown in FIG. 2, the oldest heat collection start performance time is deleted from the heat collection start performance times obtained up to the previous day, and a new heat collection start performance time is added to form a heat collection start performance time group. In addition, the oldest heat collection end result time is deleted from the heat collection end result times obtained up to the previous day, and a new heat collection end result time is added to form a heat collection end result time group. The time earlier by the predetermined time from the earliest time in the start performance time group is delayed by the predetermined time from the latest time in the heat collection determination time zone and the latest time in the heat collection end time group. The time is set as a new heat collection determination end time in the heat collection determination time zone (S3). Thereby, a new heat collection determination time zone is set, and the determination of the heat collection operation on the next day is performed in this new heat collection determination time zone. When the new heat collection determination start time is earlier than 6 am, the heat collection determination start time is 6 am, and when the new heat collection determination start time is later than 10 am, the heat collection determination start time is 10 am Set at time. If the new heat collection determination end time is later than 6:00 pm, the heat collection determination end time is 6:00 pm, and if the new heat collection determination end time is earlier than 2:00 pm, the heat collection determination end time is 2 pm Set at time

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included.

It is explanatory drawing of the warm water heating apparatus with which the warm water heating method which concerns on one embodiment of this invention is applied. It is a flowchart which shows the same warm water heating method. It is a flowchart which determines the heat collection determination time slot | zone in the same warm water heating method. It is a flowchart which determines the heat collection determination time slot | zone in the same warm water heating method. It is a flowchart of the heat collection operation | movement in the same warm water heating method.

10: Hot water heating device, 11: Hot water tank, 12: Heat exchanger, 13: Solar heat collector, 14: Heat collector side heat medium feed pipe, 15: Heat collector side heat medium return pipe, 16: Control means 17: Heat medium feed pipe, 18: Solar pump, 19: Heat medium return pipe, 20: Bypass path, 21: Three-way valve, 22: Heat medium outlet side thermistor, 23: Heat medium inlet side thermistor, 24: For water supply Piping, 25: Hot water extraction pipe, 26: Lower hot water thermistor

Claims (5)

A heat exchanger provided in the hot water tank and through which the heat medium passes and a solar heat collector that heats the heat medium with solar heat are connected, and the heat medium heated by the solar heat collector is connected to the solar heat collector In the warm water heating method of heating the warm water in the warm water tank by circulating between the heat exchanger and the heat exchanger,
A continuous heat collection judgment time zone including a time zone in which the heat collection operation in which the hot water in the hot water tank is heated with the heat medium heated by the solar heat collector is possible, and in the heat collection judgment time zone, When the heat collecting operation is stopped, it is determined whether or not the heat collecting operation can be performed at regular intervals, and when it is determined that the heat collecting operation is possible, the heat medium heated by the solar heat collector is heated. is circulated between the exchanger and the solar heat collector have row hot water heating in the hot water tank,
Before the heat collection operation is actually performed in the heat collection determination time zone, the heat collection start actual time which is the earliest time at which the heat collection operation is started and the heat collection operation are performed over a plurality of days. A heat collection end result time that is the latest end time is obtained, and a time earlier by a predetermined time from the earliest time among the heat collection start result times is set as a heat collection determination start time, and the heat collection end result time The time later than the latest time by the predetermined time is set as the heat collection determination end time, and the time from the heat collection determination start time to the heat collection determination end time is set in advance as the heat collection determination time zone,
When the time earlier by the predetermined time from the earliest time in the heat collection start actual time is earlier than 6:00 am, the heat collection determination start time is 6:00 am, the earliest among the heat collection start actual times. If the time earlier than the time by 10 am is later than 10:00 am, the heat collection determination start time is 10:00 am, and the time later by the predetermined time from the latest heat collection end time is If it is later than 6 o'clock, the heat collection determination end time is 6 pm, and if the time later by the predetermined time is earlier than 2 pm from the latest time among the heat collection end performance times, the heat collection determination ends. A hot water heating method, characterized in that each time is set at 2 pm . A heat exchanger provided in the hot water tank and through which the heat medium passes and a solar heat collector that heats the heat medium with solar heat are connected, and the heat medium heated by the solar heat collector is connected to the solar heat collector In the warm water heating method of heating the warm water in the warm water tank by circulating between the heat exchanger and the heat exchanger,
A continuous heat collection judgment time zone including a time zone in which the heat collection operation in which the hot water in the hot water tank is heated with the heat medium heated by the solar heat collector is possible, and in the heat collection judgment time zone, When the heat collecting operation is stopped, it is determined whether or not the heat collecting operation can be performed at regular intervals, and when it is determined that the heat collecting operation is possible, the heat medium heated by the solar heat collector is heated. is circulated between the exchanger and the solar heat collector have row hot water heating in the hot water tank,
Before the heat collection operation is actually performed in the heat collection determination time zone, the heat collection start actual time which is the earliest time at which the heat collection operation is started and the heat collection operation are performed over a plurality of days. A heat collection end result time that is the latest end time is obtained, and a time earlier by a predetermined time from the earliest time among the heat collection start result times is set as a heat collection determination start time, and the heat collection end result time The time later than the latest time by the predetermined time is set as the heat collection determination end time, and the time from the heat collection determination start time to the heat collection determination end time is set in advance as the heat collection determination time zone,
When the time earlier than the predetermined time A is earlier than the earliest time among the heat collection start actual times, the heat collection determination start time is set to the predetermined time A and the heat collection start actual time is When the time earlier than the earliest time by the predetermined time is later than the predetermined time B, which is a time later than the predetermined time A, the heat collection determination start time is set to the predetermined time B, and the heat collection end result time When the time later than the latest time by the predetermined time is later than the predetermined time C, the heat collection determination end time is set to the predetermined time C, and the heat collection end result time is further from the latest time by the predetermined time. The hot water heating method, wherein when the later time is earlier than a predetermined time D that is earlier than the predetermined time C, the heat collection determination end time is set to the predetermined time D, respectively . The hot water heating method according to claim 1 or 2 , wherein when the heat collection operation is actually performed in the heat collection determination time zone, it is determined that the heat collection operation is not possible, and the time is the heat collection determination end time. When the heat collection start result time is set as the new heat collection start result time and the heat collection end result time is set as the new heat collection end result time, the heat collection start result obtained up to the previous day is set. The oldest heat collection start performance time is deleted from the time, and the new heat collection start performance time is added to form a heat collection start performance time group. Delete the old heat collection end result time and add the new heat collection end result time to form a heat collection end result time group, and further the predetermined time from the earliest time in the heat collection start result time group The new time for the heat collection judgment time zone Start time, hot water heating method characterized by further slow time for the predetermined time period from the latest time in the heat collecting finished actual time group is set as a new heat collecting determining the end time of the heat collector determined time zone. The hot water heating method according to any one of claims 1 to 3 , wherein the heat exchanger includes a heat medium feed pipe that sends a heat medium heated by the solar heat collector to the heat exchanger, and a pump. A heat medium return pipe returning to the solar heat collector, and connecting a bypass path communicating with a portion upstream of the pump of the heat medium return pipe to the heat medium feed pipe via a three-way valve, and the three-way A heat medium temperature detector that measures the temperature of the heat medium from the valve to the solar heat collector side is installed, and the three-way valve is operated to connect the heat medium feed pipe and the heat medium return pipe via the bypass path. While operating the pump in a connected state, the temperature of the heating medium is measured with the heating medium temperature detector while flowing the heating medium, and the temperature of the hot water is measured with the hot water temperature detector provided in the hot water tank. When the difference between the temperature of the medium and the temperature of the hot water is 5 ° C. or more, the heat collection Water heating method characterized by determining a rolling variable and. 5. The hot water heating method according to claim 4 , wherein when it is determined that the heat collection operation is possible, the three-way valve is operated to supply a heat medium to the heat exchanger via the heat medium feed pipe, and When it is determined that thermal operation is not possible, the hot water heating method is characterized in that the communication state of the heat medium feed pipe and the heat medium return pipe via the bypass path is maintained.

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