JP5416265B2 - Hot water storage water heater - Google Patents

Description

The present invention comprises an auxiliary heating means for heating hot water sent from a hot water tank and flowing through a hot water supply path,
A hot water temperature detecting means for detecting a hot water temperature from the hot water storage tank;
Water mixing means for mixing the water from the water supply passage into the hot water supply passage portion located between the auxiliary heating means and the hot water storage tank;
Hot water detection means for detecting the hot water state from the hot water supply path;
When the hot water detection means detects hot water, the auxiliary heating means and the auxiliary heating means so that the hot water temperature discharged from the hot water supply path becomes a set target temperature based on the detection information of the hot water temperature detection means. And a control means for operating the water mixing means,
The control means is
When the relationship between the target temperature and the tapping temperature is such that the hot water at the target temperature can be tapped from the hot water supply passage in a state where the operation of the auxiliary heating means is stopped, the hot water temperature is the target temperature. Controlling the water mixing means so as to be, and executing a stop mode operation process for stopping the auxiliary heating means, and
When the relationship between the target temperature and the tapping temperature is an auxiliary heating necessary state in which the auxiliary heating unit needs to be operated, the auxiliary heating unit is operated to heat the hot water to the target temperature, and the auxiliary heating unit is operated. The present invention relates to a hot water storage type hot water supply apparatus configured to execute a heating operation mode operation process for controlling the water mixing means so as to suppress the hot water supply temperature from becoming higher than the target temperature by heating the heating means. .

  Such a hot water storage type hot water supply apparatus supplies hot water through hot water supply passages to hot water consumption points such as currants and showers. When the relationship between the target temperature and the tapping temperature of hot water supplied from the hot water storage tank is in a state where the auxiliary heating means is stopped and the operation of the auxiliary heating means is stopped and the hot water at the target temperature can be discharged from the hot water supply path, the stop mode When the operation process is executed and the relationship between the target temperature and the hot water temperature is an auxiliary heating necessary state in which the auxiliary heating means needs to be operated, the heating operation operation process is executed to discharge hot water from the hot water supply passage. The hot water supply temperature is controlled to the target temperature (see, for example, Patent Document 1).

Incidentally, as a form of discrimination when the auxiliary heating is required and when the auxiliary heating is not required, in Patent Document 1, the difference between the tapping temperature and the target temperature is equal to or less than a set value for determination (for example, 2 ° C.). If this is the case, it is determined that the auxiliary heating is necessary, and if the difference between the tapping temperature and the target temperature is larger than the setting value for determination (for example, 2 ° C.), a mode for determining that the auxiliary heating is unnecessary is adopted. Yes. Incidentally, as the setting value for discrimination, 0 ° C. can be used instead of 2 ° C. However, if a value larger than 0 ° C. such as 2 ° C. is used, the hot water supply passage portion from the hot water storage tank to the auxiliary heating means is Even when the temperature of the hot water discharged from the hot water tank is lowered in a long case, the hot water can be supplied after being heated to the target temperature by the auxiliary heating means.
Moreover, as a form of discrimination when the auxiliary heating is necessary and when the auxiliary heating is not necessary, in addition to the form described in Patent Document 1, for example, the difference between the tapping temperature and the target temperature is for heating discrimination. If it is less than the set value (for example, 2 ° C.), it is determined that the auxiliary heating is necessary, and the difference between the tapping temperature and the target temperature is larger than the set value for determining the heating (for example, 2 ° C.). For example, if the temperature is 3 ° C. or higher, it is possible to determine that the auxiliary heating is not necessary. In this case, the auxiliary heating is necessary and the heating operation mode operation process is performed once. Is started, the heating operation mode operation process is performed until the difference between the tapping temperature and the target temperature becomes equal to or greater than the unnecessary determination setting value (eg, 3 ° C.) that is greater than the heating determination setting value (eg, 2 ° C.). Because it will be continued, A stop mode operation process and a heating operation mode operation processing becomes what can suppress the frequent cutting 換Ru.

When the explanation of the control of the water mixing means in the heating operation mode operation processing is added, the auxiliary heating means has a minimum heating amount in the heating operation, and when the difference between the tapping temperature and the target temperature is small, When the hot water in the hot water tank is directly heated by the auxiliary heating means, the temperature of the hot water heated by the auxiliary heating means may be higher than the target temperature even if the auxiliary heating means is operated at its minimum heating amount, For this reason, the water mixing means is controlled so as to suppress the hot water supply temperature from becoming higher than the target temperature. That is, the temperature of the hot water supplied to the auxiliary heating means is lowered below the target temperature by mixing the water from the hot water tank with the hot water from the hot water tank, and the water from the water supply path is mixed. In general, the amount is often controlled so that the hot water at the target temperature is supplied when the auxiliary heating means is operated at the minimum heating amount.
In addition, even if the difference between the hot water temperature and the target temperature becomes large and the hot water in the hot water tank is heated by the auxiliary heating means as it is, the temperature of the hot water heated by the auxiliary heating means may become higher than the target temperature. When there is no more water, that is, when the hot water in the hot water tank can be heated to the target temperature by the auxiliary heating means, the mixing of water from the water supply channel is generally stopped, but the water from the water supply channel is stopped. Mixing may be continued.

JP 2006-010115 A

As described above, when the heating operation mode operation process is being performed, the temperature of the hot water supplied to the auxiliary heating means is lowered from the target temperature by mixing the hot water from the hot water tank with the water from the water supply channel. However, when the heating operation mode operation process is being executed in such a state, the target temperature is changed to the lower side, and the relationship between the tapping temperature and the target temperature becomes an auxiliary heating unnecessary state. Thus, the state where the heating operation mode operation process is executed may be switched to the state where the stop mode operation process is executed. In this way, when switching from the state in which the heating operation mode operation process is performed to the state in which the stop mode operation process is performed, immediately after that, the heating operation mode operation process is located in the hot water supply channel portion between the water mixing unit and the auxiliary heating unit. The hot water is obtained by mixing the hot water from the hot water tank with the water from the water supply channel, and there is a possibility that the temperature of the hot water is lower than the changed target temperature.
For this reason, when it switches from the state which performs heating operation mode operation processing to the state in which stop mode operation processing is performed, it is located in the hot-water supply channel part between water mixing means and auxiliary heating means immediately after that. Due to the fact that low-temperature hot water is supplied without being heated by the auxiliary heating means, hot water that is lower than the changed target temperature is supplied, which may cause discomfort to the user. It was desired.

  The present invention has been made in view of the above circumstances, and its purpose is to suppress the supply of hot water that is lower than the changed target temperature and to give the user an unpleasant feeling. The point is to provide a hot water storage type hot water supply apparatus that can be avoided.

The first characteristic configuration of the hot water storage type hot water supply apparatus of the present invention is:
Auxiliary heating means for heating hot water sent from the hot water tank and flowing through the hot water supply path;
A hot water temperature detecting means for detecting a hot water temperature from the hot water storage tank;
Water mixing means for mixing the water from the water supply passage into the hot water supply passage portion located between the auxiliary heating means and the hot water storage tank;
Hot water detection means for detecting the hot water state from the hot water supply path;
When the hot water detection means detects hot water, the auxiliary heating means and the auxiliary heating means so that the hot water temperature discharged from the hot water supply path becomes a set target temperature based on the detection information of the hot water temperature detection means. And a control means for operating the water mixing means,
The control means is
When the relationship between the target temperature and the tapping temperature is such that the hot water at the target temperature can be tapped from the hot water supply passage in a state where the operation of the auxiliary heating means is stopped, the hot water temperature is the target temperature. Controlling the water mixing means so as to be, and executing a stop mode operation process for stopping the auxiliary heating means, and
When the relationship between the target temperature and the tapping temperature is an auxiliary heating necessary state in which the auxiliary heating unit needs to be operated, the auxiliary heating unit is operated to heat the hot water to the target temperature, and the auxiliary heating unit is operated. In one configured to execute a heating operation mode operation process for controlling the water mixing means so as to suppress the hot water supply temperature from becoming higher than the target temperature by heating the heating means,
The control means is
When the difference between the tapping temperature and the target temperature is equal to or less than the heating determination set value, it is determined that the auxiliary heating is necessary, and the difference between the tapping temperature and the target temperature is larger than the heating determination setting value. It is configured to determine that the auxiliary heating is not required when the unnecessary determination setting value is exceeded, and
When the hot water supply from the hot water supply passage is stopped during the heating operation mode operation process, when the hot water supply from the hot water supply passage is started within the set time after the hot water supply stop, the unnecessary determination setting value is set. It is characterized in that it is configured to change the set amount to a large value.

  In other words, if the difference between the tapping temperature and the target temperature falls below the heating discrimination set value, it is determined that the auxiliary heating is necessary, and the difference between the tapping temperature and the target temperature is larger than the heating discrimination setting value. Since it is configured to determine that the auxiliary heating is not required when the value is equal to or higher than the value, once the heating operation mode operation process is started after the auxiliary heating is required, the tapping temperature and the target temperature are set. Since the heating operation mode operation process is continued until the difference between the two is greater than the heating determination setting value, the heating operation mode operation process is continued. Therefore, the stop mode operation process and the heating operation mode operation process are frequently switched. Therefore, it becomes easy to stabilize the hot water supply temperature.

  When hot water from the hot water supply passage is stopped during the heating operation mode operation process, when the hot water discharge from the hot water supply passage is started within the set time after the hot water supply is stopped, the setting value for determining the needlessness is set. Because it is configured to change to a large value, even if the target temperature is changed and set to the lower side until the set time elapses after temporarily stopping hot water supply, When the amount of change of the target temperature to the lower side is smaller than the set amount for changing the unnecessary determination setting value, the heating operation mode operation process is continued, and as a result, the hot water supply path between the water mixing means and the auxiliary heating means It is possible to avoid that hot water having a temperature lower than the target temperature that has been changed and set is avoided by avoiding that hot water that is located in the portion is not heated by the auxiliary heating means without being heated.

  By the way, since the heating operation mode operation process is continued by changing the unnecessary determination setting value to a large value, the water from the water supply channel is mixed with the hot water from the hot water tank and used as an auxiliary heating means. It goes without saying that the water mixing means is controlled so as to suppress the hot water supply temperature from becoming higher than the target temperature by lowering the temperature of the supplied hot water.

  Therefore, when hot water supply is temporarily stopped, the target temperature is changed to the lower side, and hot water is supplied again, hot water lower than the changed target temperature is prevented from being supplied, and the user feels uncomfortable. The hot water storage type hot water supply apparatus which can avoid giving water is provided.

In addition to the first feature configuration, the second feature configuration of the hot water storage type hot water supply apparatus of the present invention includes:
When the target temperature is changed to a low temperature side, the control means changes the unnecessary determination setting value to a value larger by a set amount, and changes the unnecessary determination setting value when the tapping temperature rises. It is characterized by not being configured.

That is, when the target temperature is changed to a low temperature side when the unnecessary determination setting value is changed to a value larger than the set amount and the heating operation mode operation process is continued, hot water that is lower than the changed target temperature is supplied. In order to suppress this, the unnecessary determination setting value is changed to a value larger than the set amount so that the heating operation mode operation process is easily performed, but when the hot water temperature is changed to a high temperature side, the hot water is discharged from the hot water tank. In order to suppress wasteful energy consumption such as waste caused by mixing a large amount of water with hot water and waste by operating auxiliary heating means, change the unnecessary discrimination setting value to a larger value. Instead, the stop mode operation process is easily performed.
That is, the heating operation mode operation process is easily continued only when the target temperature is changed to the low temperature side, and the stop mode operation process is easily executed when the tapping temperature changes to the high temperature side. Thus, wasteful energy consumption is suppressed while suppressing discomfort to the user by supplying hot water lower than the changed target temperature.

  In other words, when the target temperature is changed and set, the temperature of the hot water to be supplied is not suitable for the user and the temperature of the hot water to be supplied is not suitable for the user. Because it is a time to be strongly conscious, if the temperature of the hot water to be supplied falls below the intended temperature at this time, there is a risk of giving the user a great discomfort, but without changing the target temperature, Even if the temperature of the hot water to be supplied decreases when the hot water to be used is continuously used, the user is not conscious of the temperature of the hot water to be supplied. In view of the fact that there is little possibility of giving great discomfort, when the target temperature is changed to the low temperature side, it is possible to accurately suppress the supply of hot water lower than the changed target temperature. In the heating operation mode operation process, When the tapping temperature has changed to the high temperature side, the stop mode operation process is easily performed without continuing the heating operation mode operation process in order to suppress wasteful energy consumption. is there.

Therefore, in addition to the operational effects of the first characteristic configuration, a hot water storage type hot water supply apparatus that can avoid giving the user unpleasantness while suppressing wasteful energy consumption has been provided.

In addition to the first or second characteristic configuration described above, the third characteristic configuration of the hot water storage type hot water supply apparatus of the present invention includes:
In the case where the control means changes the target temperature to the low temperature side and the rise of the tapping temperature occurs at the same time, the magnitude of the decrease of the target temperature to the low temperature side is the tapping temperature. If it is equal to or greater than the magnitude of the increase to the high temperature side, the setting value for determining unnecessary is changed to a large value by a set amount, and the magnitude of the decrease in the target temperature to the low temperature side increases to the high temperature side of the tapping temperature. If it is less than the magnitude of the increase, the unnecessary determination setting value is not changed.

That is, when the target temperature is changed to the low temperature side and the tapping temperature rises at the same time, the magnitude of the decrease of the target temperature to the low temperature side is the magnitude of the rise of the tapping temperature to the high temperature side. If the temperature is equal to or greater than this, in order to prevent hot water having a temperature lower than the changed target temperature from being supplied, the unnecessary determination setting value is changed to a value larger than the set amount, and the heating operation mode operation process is performed. Although it is easy to execute, if the magnitude of the decrease in the target temperature to the low temperature side is less than the magnitude of the rise in the hot water temperature to the high temperature side, a large amount of water is mixed with the hot water discharged from the hot water tank. Stop mode operation processing is executed without changing the unnecessary determination setting value to a large value in order to suppress wasteful energy consumption such as waste that would otherwise be caused or by operating the auxiliary heating means. To make it easier
That is, when the target temperature is changed to the low temperature side and the tapping temperature rises simultaneously, the magnitude of the decrease in the target temperature to the low temperature side is the increase in the tapping temperature to the high temperature side. If it is greater than or equal to the magnitude, the heating operation mode operation process is easily continued, and if the magnitude of the decrease in the target temperature to the low temperature side is less than the magnitude of the rise in the hot water temperature to the high temperature side, By facilitating the execution of the stop mode operation process, wasteful energy consumption is suppressed while suppressing discomfort to the user by supplying hot water lower than the changed target temperature. is there.

Therefore, in addition to the operational effects of the first or second characteristic configuration, the hot water storage type hot water supply that can prevent hot water having a temperature lower than the changed target temperature from being supplied and avoid discomfort to the user can be avoided. The device has been provided.

The fourth characteristic configuration of the hot water storage type hot water supply apparatus according to the present invention is:
Auxiliary heating means for heating hot water sent from the hot water tank and flowing through the hot water supply path;
A hot water temperature detecting means for detecting a hot water temperature from the hot water storage tank;
Water mixing means for mixing the water from the water supply passage into the hot water supply passage portion located between the auxiliary heating means and the hot water storage tank;
Hot water detection means for detecting the hot water state from the hot water supply path;
When the hot water detection means detects hot water, the auxiliary heating means and the auxiliary heating means so that the hot water temperature discharged from the hot water supply path becomes a set target temperature based on the detection information of the hot water temperature detection means. And a control means for operating the water mixing means,
The control means is
When the relationship between the target temperature and the tapping temperature is such that the hot water at the target temperature can be tapped from the hot water supply passage in a state where the operation of the auxiliary heating means is stopped, the hot water temperature is the target temperature. Controlling the water mixing means so as to be, and executing a stop mode operation process for stopping the auxiliary heating means, and
When the relationship between the target temperature and the tapping temperature is an auxiliary heating necessary state in which the auxiliary heating unit needs to be operated, the auxiliary heating unit is operated to heat the hot water to the target temperature, and the auxiliary heating unit is operated. In one configured to execute a heating operation mode operation process for controlling the water mixing means so as to suppress the hot water supply temperature from becoming higher than the target temperature by heating the heating means,
The control means is
When the difference between the tapping temperature and the target temperature is equal to or less than the heating determination set value, it is determined that the auxiliary heating is necessary, and the difference between the tapping temperature and the target temperature is larger than the heating determination setting value. It is configured to determine that the auxiliary heating is not required when the unnecessary determination setting value is exceeded, and
When the target temperature is changed to a lower temperature during the heating operation mode operation process, the unnecessary determination setting value is changed to a value larger by a set amount.

  In other words, if the difference between the tapping temperature and the target temperature falls below the heating discrimination set value, it is determined that the auxiliary heating is necessary, and the difference between the tapping temperature and the target temperature is larger than the heating discrimination setting value. Since it is configured to determine that the auxiliary heating is not required when the value is equal to or higher than the value, once the heating operation mode operation process is started after the auxiliary heating is required, the tapping temperature and the target temperature are set. Since the heating operation mode operation process is continued until the difference between the two is greater than the heating determination setting value, the heating operation mode operation process is continued. Therefore, the stop mode operation process and the heating operation mode operation process are frequently switched. Therefore, it becomes easy to stabilize the hot water supply temperature.

  When the target temperature is changed to the low temperature side during the heating operation mode operation process, the unnecessary determination setting value is changed to a larger set amount. When the target temperature is changed to the lower side during the mode operation process and the change amount to the lower target temperature is smaller than the changed setting value for unnecessary determination, the heating operation mode operation process is performed. As a result of this, the target temperature is changed and set so that the low-temperature hot water located in the hot water supply portion between the water mixing means and the auxiliary heating means is not heated by the auxiliary heating means without being heated. Therefore, it is possible to avoid the supply of hot water lower than that.

  By the way, since the heating operation mode operation process is continued by changing the unnecessary determination setting value to a large value, the water from the water supply channel is mixed with the hot water from the hot water tank and used as an auxiliary heating means. It goes without saying that the water mixing means is controlled so as to suppress the hot water supply temperature from becoming higher than the target temperature by lowering the temperature of the supplied hot water.

  Therefore, when the target temperature is changed and set to the lower side during the heating operation mode operation process, hot water lower than the changed target temperature is prevented from being supplied, and the user is uncomfortable. The hot water storage type hot water supply apparatus which can avoid giving has come to be provided.

In addition to the fourth characteristic configuration, the fifth characteristic configuration of the hot water storage type hot water supply apparatus of the present invention includes:
When the target temperature is changed to a low temperature side, the control means changes the unnecessary determination setting value to a value larger by a set amount, and changes the unnecessary determination setting value when the tapping temperature rises. It is characterized by not being configured.

That is, when the target temperature is changed to a low temperature side when the unnecessary determination setting value is changed to a value larger than the set amount and the heating operation mode operation process is continued, hot water that is lower than the changed target temperature is supplied. In order to suppress this, the unnecessary determination setting value is changed to a value larger than the set amount so that the heating operation mode operation process is easily performed, but when the hot water temperature is changed to a high temperature side, the hot water is discharged from the hot water tank. In order to suppress wasteful energy consumption such as waste caused by mixing a large amount of water with hot water and waste by operating auxiliary heating means, change the unnecessary discrimination setting value to a larger value. Instead, the stop mode operation process is easily performed.
That is, the heating operation mode operation process is easily continued only when the target temperature is changed to the low temperature side, and the stop mode operation process is easily executed when the tapping temperature changes to the high temperature side. Thus, wasteful energy consumption is suppressed while suppressing discomfort to the user by supplying hot water lower than the changed target temperature.

  In other words, when the target temperature is changed and set, the temperature of the hot water to be supplied is not suitable for the user and the temperature of the hot water to be supplied is not suitable for the user. Because it is a time to be strongly conscious, if the temperature of the hot water to be supplied falls below the intended temperature at this time, there is a risk of giving the user a great discomfort, but without changing the target temperature, Even if the temperature of the hot water to be supplied decreases when the hot water to be used is continuously used, the user is not conscious of the temperature of the hot water to be supplied. In view of the fact that there is little possibility of giving great discomfort, when the target temperature is changed to the low temperature side, it is possible to accurately suppress the supply of hot water lower than the changed target temperature. In the heating operation mode operation process, When the tapping temperature has changed to the high temperature side, the stop mode operation process is easily performed without continuing the heating operation mode operation process in order to suppress wasteful energy consumption. is there.

Therefore, in addition to the operational effects of the fourth feature configuration, a hot water storage type hot water supply apparatus that can avoid giving the user unpleasant feeling while suppressing wasteful energy consumption has been provided.

In addition to the fourth or fifth characteristic configuration described above, the sixth characteristic configuration of the present invention includes:
In the case where the control means changes the target temperature to the low temperature side and the rise of the tapping temperature occurs at the same time, the magnitude of the decrease of the target temperature to the low temperature side is the tapping temperature. If it is equal to or greater than the magnitude of the increase to the high temperature side, the setting value for determining unnecessary is changed to a large value by a set amount, and the magnitude of the decrease in the target temperature to the low temperature side increases to the high temperature side of the tapping temperature If it is less than the magnitude of the increase, the unnecessary determination setting value is not changed.

That is, when the target temperature is changed to the low temperature side and the tapping temperature rises at the same time, the magnitude of the decrease of the target temperature to the low temperature side is the magnitude of the rise of the tapping temperature to the high temperature side. If the temperature is equal to or greater than this, in order to prevent hot water having a temperature lower than the changed target temperature from being supplied, the unnecessary determination setting value is changed to a value larger than the set amount, and the heating operation mode operation process is performed. Although it is easy to execute, if the magnitude of the decrease in the target temperature to the low temperature side is less than the magnitude of the rise in the hot water temperature to the high temperature side, a large amount of water is mixed with the hot water discharged from the hot water tank. Stop mode operation processing is executed without changing the unnecessary determination setting value to a large value in order to suppress wasteful energy consumption such as waste that would otherwise be caused or by operating the auxiliary heating means. To make it easier
That is, when the target temperature is changed to the low temperature side and the tapping temperature rises simultaneously, the magnitude of the decrease in the target temperature to the low temperature side is the increase in the tapping temperature to the high temperature side. If it is greater than or equal to the magnitude, the heating operation mode operation process is easily continued, and if the magnitude of the decrease in the target temperature to the low temperature side is less than the magnitude of the rise in the hot water temperature to the high temperature side, By facilitating the execution of the stop mode operation process, wasteful energy consumption is suppressed while suppressing discomfort to the user by supplying hot water lower than the changed target temperature. is there.

Accordingly, in addition to the operational effects of the fourth or fifth characteristic configuration, the hot water storage type hot water supply that can prevent hot water having a temperature lower than the changed target temperature from being supplied and avoid discomfort to the user can be avoided. The device has been provided.

In addition to any of the first to sixth feature configurations described above, the seventh feature configuration of the present invention includes:
When the control unit changes the unnecessary determination set value to a large set amount, when the heating operation mode operation process is executed, the auxiliary heating unit is set to a set heating amount larger than the minimum heating amount. The water mixing unit is controlled so that the hot water supply temperature becomes the target temperature when operated.

In other words, when the heating operation mode operation process is executed when the unnecessary determination setting value is changed to a large setting amount, the hot water supply temperature is set to the target temperature by operating at a setting heating amount larger than the minimum heating amount. Therefore, even if the temperature of the hot water supplied by the auxiliary heating means changes due to a change in the hot water temperature or a change in the target temperature, the auxiliary heating means As a result, the hot water at the target temperature is discharged from the hot water, so that the hot water at the target temperature can be supplied.
That is, the hot water temperature from the hot water tank changes due to various factors such as turbulence of hot water stored in the hot water tank and detection error of the hot water temperature detecting means, and is used for controlling the water mixing means. Is accompanied by a delay time. For this reason, in the case where the heating operation mode operation process is executed, if the hot water is supplied to the auxiliary heating means so that the hot water supply temperature becomes the target temperature by operating at the minimum heating amount, the temperature of the tapping water changes. The temperature of the hot water supplied by the auxiliary heating means may become higher than the target temperature at the minimum heating amount due to the change of the target temperature or the target temperature. The supplied hot water temperature is higher than the target temperature, which gives the user discomfort, but it is possible to avoid giving the user discomfort in this way.

Therefore, in addition to the operational effects of any one of the first to sixth characteristic configurations, the hot water storage can be used as much as possible to avoid discomfort to the user by allowing the target temperature to be appropriately supplied even when the tapping temperature changes. It came to provide the type hot water supply device.

In addition to any of the first to seventh feature configurations, the eighth feature configuration of the present invention includes:
Even when the auxiliary heating unit is operated at the minimum heating amount when the control unit executes the heating operation mode operation process when the unnecessary determination setting value is changed to a large setting amount, the hot water supply When it is determined that the temperature is higher than the target temperature, the stop mode operation process is performed.

In other words, when the heating operation mode operation process is executed when the unnecessary determination setting value is changed to a larger value, the hot water supply temperature is higher than the target temperature even if the auxiliary heating means is operated at the minimum heating amount. When it becomes higher, the stop mode operation process is executed.
In other words, when the heating operation mode operation process is executed when the unnecessary determination setting value is changed to a value larger than the set amount, the temperature of the hot water discharged from the hot water tank is increased, and water is supplied from the water supply channel. The temperature of hot water obtained by controlling the water mixing means causes the auxiliary heating means to operate at the minimum heating amount due to the rise of the water temperature and the change of the target temperature to the low temperature side. However, there is a risk that the hot water supply temperature becomes a temperature that becomes higher than the target temperature. In such a case, the heating operation mode operation process is stopped and the stop mode operation process is executed. Thus, hot water having a temperature higher than the target temperature is prevented from being supplied.

Therefore, in addition to the operational effects of any of the first to seventh characteristic configurations, when the heating operation mode operation process is executed when the unnecessary determination setting value is changed to a large setting amount, the hot water is discharged from the hot water storage tank. Hot water storage type hot water supply device that can prevent hot water hotter than the target temperature from being supplied even if the temperature of the hot water to be supplied rises or the temperature of the water supplied from the water supply channel rises It came to offer.

In addition to any of the first to eighth feature configurations described above, the ninth feature configuration of the present invention includes:
In the heating operation mode operation process, the control unit controls the water mixing unit so that the hot water supply temperature becomes the target temperature by operating the auxiliary heating unit with a set heating amount larger than the minimum heating amount. It is characterized by being configured to do so.

That is, when the heating operation mode operation process is executed, hot water that causes the hot water supply temperature to become the target temperature by operating at a set heating amount larger than the minimum heating amount is supplied to the auxiliary heating means. Therefore, even if the temperature of the hot water supplied by the auxiliary heating means changes due to a change in the hot water temperature, the hot water at the target temperature is discharged from the auxiliary heating means, so that the hot water at the target temperature can be supplied. It becomes a thing.
That is, the hot water temperature from the hot water tank changes due to various factors such as turbulence of hot water stored in the hot water tank and detection error of the hot water temperature detecting means, and is used for controlling the water mixing means. Is accompanied by a delay time. For this reason, in the case where the heating operation mode operation process is executed, if the hot water is supplied to the auxiliary heating means so that the hot water supply temperature becomes the target temperature by operating at the minimum heating amount, the temperature of the tapping water changes. Therefore, the temperature of the hot water supplied by the auxiliary heating means may become higher than the target temperature at the minimum heating amount. As a result, when hot water is supplied, the hot water is discharged from the auxiliary heating means. The hot-water supply temperature to be supplied in this way becomes higher than the target temperature and gives the user an unpleasant feeling, but it is possible to avoid giving the user an unpleasant feeling in this way.

Therefore, in addition to the operational effects of any one of the first to eighth characteristic configurations, the hot water storage can avoid the user from being uncomfortable as much as possible by appropriately supplying the target temperature even if the hot water temperature changes. It came to provide the type hot water supply device.

Schematic configuration diagram of a hot water storage hot water supply system Block diagram showing control configuration Diagram showing opening adjustment of water mixing means The figure which shows the relationship between the heating command by the difference between the tapping temperature and target temperature in 1st Embodiment, and a stop command The flowchart which shows the control content in 1st Embodiment. The figure which shows the relationship between the heating command by the difference of the tapping temperature and target temperature in 2nd Embodiment, and a stop command. The flowchart which shows the control content in 2nd Embodiment. The flowchart which shows the control content in 2nd Embodiment. The figure which shows the relationship between the heating instruction | command by the difference of the tapping temperature and target temperature in 3rd Embodiment, and a stop instruction | command. The flowchart which shows the control content in 3rd Embodiment.

[First Embodiment]
Hereinafter, a first embodiment which is a reference embodiment of the present invention will be described with reference to the drawings .
As shown in FIG. 1, a hot water storage type hot water supply device is provided in which hot water from a hot water tank 1 is supplied to a hot water consumption point 3 such as a hot water tap through a hot water supply path 2.
And the auxiliary heating means A which heats the hot water sent out from the hot water tank 1 and flows through the hot water supply path 2, and the hot water supply passage portion located between the auxiliary heating means A and the hot water storage tank from the water supply path 4 The water mixing means B for mixing the water is provided so that the hot water temperature discharged from the hot water supply passage 2 is adjusted to the set target temperature M, as will be described later. In general, the water supply channel 4 is configured to supply tap water.

The hot water tank 1 is configured to store hot water recovered from exhaust heat generated by the power generation apparatus G provided with the gas engine 5. That is, a liquid heat exchange type cooling water heat exchanger 7 through which the cooling water flows through the cooling water circulation path 6 connected to the cooling water jacket 5A of the gas engine 5 and the cooling water circulation pump 8 are provided. The exhaust heat of the engine 5 is configured to be supplied to the cooling water heat exchanger 7. The hot water in the hot water tank 1 is circulated through the cooling water heat exchanger 7 through the hot water circulation path 10 connected to the bottom and top of the hot water tank 1 and provided with the hot water circulation pump 9. The heated hot water is stored so as to form a temperature stratification.
The water supply path 4 is connected to the bottom of the hot water tank 1, and the hot water in the hot water tank 1 is supplied to the hot water path 2 by the water pressure of the water supply path 4.

As shown in FIG. 2, a hot water storage operation for storing hot water in the hot water storage tank 1 and a hot water storage control means D for controlling the operation of the water mixing means B are provided. The hot water storage control means D is configured by using a microcomputer, and in order to perform hot water storage operation in the operation time zone instructed by the remote controller R, the operation command is instructed to the power generator G, and the cooling water circulation pump 8, And hot water storage operation control which operates hot water circulation pump 9 and stores hot water in hot water storage tank 1 is performed.
Further, the hot water storage control means D commands the auxiliary heating means A with a target temperature M determined based on the value commanded by the remote controller R, a heating command indicating the necessity of the heating operation, and a stop command indicating the stop of the heating operation. Further, a hot water temperature adjustment process for controlling the operation of the water mixing means B is executed, and details will be described later.
In addition, the operation time zone for executing the hot water storage operation control is managed by managing the time-series performance data of the electric load and the hot water supply load instead of instructing by the remote controller R as described above. Based on the predicted load data based on the predicted load data, a time zone with high driving merit such as energy saving may be obtained, and the time zone may be set as the operating time zone.

  The auxiliary heating means A is configured using a well-known instantaneous water heater, and will be briefly described with its detailed description omitted. As shown in FIG. 1, the auxiliary heating means A is for heating hot water through which hot water flows. Heat exchanger 11, heating burner 12 for heating the hot water supply heating heat exchanger 11, gas fuel adjusting valve 13 for adjusting the amount of gas fuel supplied to the heating burner 12, and gas fuel for the heating burner 12 A gas on-off valve 15 that opens and closes the supply passage 14 to intermittently supply gas fuel to the heating burner 12, a water flow detection sensor 16 that detects the amount of hot water flow, and hot water flowing into the hot water heating heat exchanger 11 A water temperature sensor 17 for detecting the temperature, a hot water temperature sensor 18 for detecting the temperature of the hot water discharged from the hot water heating / heat exchanger 11, and an ignition igniter, an ignition detection thermocouple, etc., although not illustrated. And shown in FIG. Thus, the combustion control which controls the combustion of the burner 12 for heating so that the heating control means 19 comprised using a microcomputer heats the hot water flowing through the target temperature M commanded from the hot water storage control means D Is configured to do.

As described above, when a heating command indicating the necessity of the heating operation is instructed from the hot water storage control means D, the heating control means 19 executes the combustion control, and the hot water storage control means D issues a stop command indicating the stop of the heating operation. If it does, combustion control will not be performed.
The combustion control executed by the heating control means 19 will be described. When the water flow detected by the water flow detection sensor 16 exceeds the water flow for ignition, the heating burner 12 is supplied with the gas fuel amount for ignition supplied. When combustion is started and the water flow rate becomes equal to or less than the water flow rate for ignition, combustion of the heating burner 12 is stopped.
After the combustion of the heating burner 12 is started, so-called feedforward control based on the water flow detected by the water flow detection sensor 16, the temperature of hot water detected by the incoming water temperature sensor 17, and the target temperature M is performed. And the so-called feedback control based on the hot water temperature detected by the hot water temperature sensor 18 and the target temperature M, the target combustion amount of the heating burner 12 is determined and burned at the determined target combustion amount. In addition, the amount of gas fuel supplied to the heating burner 12 is controlled.
When determining the target combustion amount, when the calculated target combustion amount is smaller than the minimum combustion amount corresponding to the minimum heating amount of the auxiliary heating means A, the minimum combustion amount is determined as the target combustion amount.

  As shown in FIG. 1, the water mixing means B includes a hot water supply path side adjustment valve 20 that adjusts the amount of hot water flowing through the hot water supply path 2 and a water supply path side adjustment valve 21 that adjusts the amount of water flowing through the water supply path 4. Thus, as shown in FIG. 3, the hot water storage control means D adjusts the opening degree of the water supply path side adjustment valve 21 from fully closed to fully open in a state where the opening degree of the hot water supply path side adjustment valve 20 is fully opened, and then continues to the water supply path side. The amount of hot water flowing through the hot water supply passage 2 and the amount of water flowing through the water supply passage 4 in a form in which the opening of the hot water supply passage side adjustment valve 20 is fully opened to fully closed while the opening of the adjustment valve 21 is fully open. It is configured to adjust the ratio.

The hot water storage control means D is a hot water temperature detecting means for detecting the hot water temperature N from the hot water storage tank 1,
The detection information of the upper temperature sensor 22 that detects the upper temperature of the hot water tank 1 and the detection information of the water amount sensor 23 that detects the water flow rate W of the hot water supply passage 2 as hot water detection means for detecting the hot water supply state from the hot water supply passage 2. Based on the detection information of the upper temperature sensor 22, the hot water supply temperature discharged from the hot water supply path 2 is determined based on the detection information of the upper temperature sensor 22 when the water flow sensor 23 is in a water flow state greater than the set water flow rate. The auxiliary heating means A and the water mixing means B are operated so that the set target temperature M is reached.

In other words, the hot water storage control means D does not require auxiliary heating so that hot water of the target temperature M can be discharged from the hot water supply passage 2 in a state where the relationship between the target temperature M and the hot water temperature N stops the operation of the auxiliary heating means A. In the state, the water mixing means B is controlled so that the hot water supply temperature becomes the target temperature M, and the stop mode operation process is executed to stop the auxiliary heating means A by instructing the auxiliary heating means A to stop. become.
Further, the hot water storage control means D instructs the auxiliary heating means A to send a heating command when the relationship between the target temperature M and the tapping temperature N is an auxiliary heating necessary state where the auxiliary heating means A needs to be operated. Heating for controlling the water mixing means so as to suppress the hot water supply temperature from becoming higher than the target temperature M by operating A to heat the hot water to the target temperature M and heating the auxiliary heating means A. The operation mode operation process is executed.
Then, as shown in FIG. 4, the hot water storage control means D is in the auxiliary heating necessary state when the difference S between the hot water temperature N and the target temperature M becomes equal to or less than the heating determination set value K (for example, 2 ° C.). When the difference S between the tapping temperature N and the target temperature M is equal to or higher than the unnecessary determination setting value J (eg, 3 ° C.) that is larger than the heating determination setting value K, it is determined that the auxiliary heating is not required. It is configured.

Furthermore, when the hot water storage control means D starts to execute the heating operation mode operation process, the hot operation mode operation process is performed even if the auxiliary heating is not required while hot water from the hot water supply passage 2 continues. When the hot water supply from the hot water supply passage 2 is stopped during the execution of the heating operation mode operation process, the hot water from the hot water supply passage 2 is discharged within a set time (for example, 3 minutes) after the hot water supply stop. When started, the heating operation mode operation process is executed even when the auxiliary heating is not required.
Then, when the target temperature M is changed to the low temperature side and the auxiliary heating is unnecessary, the hot water storage control means D executes the heating operation mode operation process, and the hot water temperature N changes to the high temperature side. As a result, when the auxiliary heating is not required, the stop mode operation process is executed.

Further, even when the hot water storage control means D is in a state where the auxiliary heating is not required, when the heating operation mode operation process is executed, the hot water supply temperature is higher than the target temperature M even if the auxiliary heating means A is operated at the minimum heating amount. When it is determined that the temperature becomes higher, the stop mode operation process is executed. In addition, the water supply path 4 is provided with a water temperature detection sensor 25 for detecting the temperature of the supplied water.
And the temperature of the water detected by the water temperature detection sensor 25, the tapping temperature N detected by the upper temperature sensor 22, the water flow amount W detected by the water amount detection sensor 23, the target temperature M, and the minimum heating Based on the amount, it is determined whether or not the hot water supply temperature becomes higher than the target temperature M even if the auxiliary heating means A is operated at the minimum heating amount.
That is, in order to make the hot water supply temperature become the target temperature M when the auxiliary heating means A is operated at the minimum heating amount, the target mixing temperature L obtained by mixing hot water with the water mixing means B is obtained, If the mixing temperature V of hot water obtained when the water mixing means B is adjusted to the lowest temperature side is higher than the target mixing temperature L, the hot water supply temperature can be maintained even if the auxiliary heating means A is operated at the minimum heating amount. It is determined that the temperature is higher than the target temperature M.
That is, the target mixing temperature L = target temperature M− (minimum heating amount / water flow amount W), and the mixing temperature V of hot water obtained when the water mixing means B is adjusted to the lowest temperature side is the target temperature. When the temperature is higher than the mixing temperature L, it is determined that the hot water supply temperature becomes higher than the target temperature M even if the auxiliary heating means A is operated at the minimum heating amount.
Incidentally, in this embodiment, the adjustment state on the coldest side of the water mixing means B is a state in which the opening degree of the water supply path side adjustment valve 21 is fully opened and the opening degree of the hot water supply path side adjustment valve 20 is fully closed. Since it corresponds, the temperature of the water detected by the water temperature detection sensor 25 corresponds to the mixing temperature V of hot water obtained when the water mixing means B is adjusted to the lowest temperature side.

In addition, the hot water storage control means D sets the auxiliary heating means A to the minimum heating amount when executing the heating operation mode operation process even if the auxiliary temperature is not required due to the target temperature M being changed to the low temperature side. It is configured to control the water mixing means B so that the hot water supply temperature becomes the target temperature M by operating at a larger set heating amount H.
Then, as described above, the hot water storage control means D is not limited to the case where the heating operation mode operation processing is executed even when the auxiliary heating is not required due to the change of the target temperature M to the low temperature side. In this case, the water mixing unit B is always controlled so that the hot water supply temperature becomes the target temperature M by operating the auxiliary heating unit A at a set heating amount H larger than the minimum heating amount.

When the hot water temperature adjusting process executed by the hot water storage control means D is described, as shown in FIG. 1, immediately after the water mixing location of the hot water supply path 2, a mixed temperature detection sensor 24 that detects the temperature of the hot water after mixing. Is provided.
In the stop mode operation process, the hot water storage control means D controls the water mixing means B so that the mixing temperature V detected by the mixing temperature detection sensor 24 becomes the target temperature M.
In the heating operation mode operation process, the water amount sensor 23 sets the target mixing temperature L at which the hot water supply temperature becomes the target temperature M by operating the auxiliary heating means A at a set heating amount H larger than the minimum heating amount. The hot water storage control means D is calculated based on the detected water flow amount W, the target temperature M, and the set heating amount H so that the mixed temperature V detected by the mixed temperature detection sensor 24 becomes the target mixed temperature L. Controls the water mixing means B.
Incidentally, since the target mixing temperature L = target temperature M− (set heating amount H / water flow amount W), the target mixing temperature L is obtained based on this relational expression.

Next, the control content of the hot water storage control means D will be described with reference to the flowchart of FIG.
First, it is determined whether or not the hot water has started, that is, whether or not W detected by the water amount sensor 23 is greater than or equal to the set water flow amount (# 1). If it is the start of the hot water, it is determined whether it is within the set time from the previous stop, that is, within 3 minutes (# 2), and if it is within 3 minutes from the previous stop, the previous heating operation mode Is determined (# 3).
When the last time is the heating operation mode, it is determined whether or not the difference S between the tapping temperature N and the target temperature M is equal to or greater than the unnecessary determination setting value J (# 4), and the difference S is used for unnecessary determination. If it is greater than or equal to the set value J, it is determined whether or not the target temperature M has been lowered (# 5). When the difference S is not equal to or greater than the unnecessary determination setting value J or when the target temperature M is decreased even if the difference S is equal to or greater than the unnecessary determination setting value J, the heating operation mode operation process is executed. (# 6).
Next, it is determined whether or not the hot water supply temperature is higher than the target temperature M even when the auxiliary heating means A is operated at the minimum heating amount (# 7). In other words, it is determined whether or not W detected by the water amount sensor 23 is equal to or greater than the set water flow amount (# 1). If not, stop processing such as stopping the operation of the water mixing means B and stopping the operation of the auxiliary heating means A is executed (# 9).

If it is determined in # 2 that it is not within the set time from the previous stop, or if it is determined in # 3 that the previous time is not the heating operation mode, the difference S between the tapping temperature N and the target temperature M Is determined to be equal to or less than the heating determination set value K (# 10), and if the difference S is equal to or less than the heating determination set value K, the heating operation mode operation process of # 6 is executed. If the difference S is larger than the heating determination set value K, stop mode operation processing is executed (# 11).
Next, it is determined whether or not the hot water is being discharged, that is, whether or not the water flow rate W detected by the water amount sensor 23 is equal to or greater than the set water flow rate (# 12). Returning to the process, if the hot water is not being discharged, the stop process of # 9 is executed.

  If it is determined in # 5 that the target temperature is not lowered or if it is determined in # 7 that the hot hot water is discharged, # 11 stop mode operation processing is executed. .

[Second Embodiment]
Next, 2nd Embodiment which is embodiment of this invention is described based on drawing. The second embodiment corresponds to the first to third feature configurations and the seventh to ninth feature configurations.
In the second embodiment, the control content of the hot water storage control means D is different from that of the first embodiment described above, and other configurations are the same as those of the first embodiment. The control contents will be described, and other descriptions will be omitted.

The hot water storage control means D uses the detection information of the upper temperature sensor 22 for detecting the upper temperature of the hot water tank 1 as the hot water temperature N from the hot water tank 1, and the water flow rate W of the hot water path 2 as the hot water state from the hot water path 2. Based on the detection information of the water amount sensor 23 to be detected, when the water amount sensor 23 is in a water flow state equal to or greater than the set water flow amount, that is, when hot water is detected, hot water supply is performed based on the detection information of the upper temperature sensor 22. The auxiliary heating means A and the water mixing means B are operated so that the hot water supply temperature discharged from the passage 2 becomes the set target temperature M.

In other words, the hot water storage control means D does not require auxiliary heating so that hot water of the target temperature M can be discharged from the hot water supply passage 2 in a state where the relationship between the target temperature M and the hot water temperature N stops the operation of the auxiliary heating means A. In the state, the water mixing means B is controlled so that the hot water supply temperature becomes the target temperature M, and the stop mode operation process is executed to stop the auxiliary heating means A by instructing the auxiliary heating means A to stop. become.
Further, the hot water storage control means D instructs the auxiliary heating means A to send a heating command when the relationship between the target temperature M and the tapping temperature N is an auxiliary heating necessary state where the auxiliary heating means A needs to be operated. Heating for controlling the water mixing means so as to suppress the hot water supply temperature from becoming higher than the target temperature M by operating A to heat the hot water to the target temperature M and heating the auxiliary heating means A. The operation mode operation process is executed.
Then, as shown in FIG. 6, the hot water storage control means D is in the auxiliary heating necessary state when the difference S between the tapping temperature N and the target temperature M becomes equal to or less than a heating determination set value K (for example, 2 ° C.). When the difference S between the tapping temperature N and the target temperature M is equal to or higher than the unnecessary determination setting value J (eg, 3 ° C.) that is larger than the heating determination setting value K, it is determined that the auxiliary heating is not required. It is configured.

Further, when the hot water supply from the hot water supply passage 2 is stopped during the execution of the heating operation mode operation process, the hot water storage control means D performs the hot water supply from the hot water supply passage within a set time (for example, 3 minutes) after the hot water supply is stopped. Is started, the unnecessary determination setting value J is changed to a large setting amount Q (for example, 5 ° C.).
Then, the hot water storage control means D changes the unnecessary determination setting value J to a value Q having a large set amount when the target temperature M is changed to a low temperature side, and when the hot water temperature rises, the unnecessary determination setting value. J is configured not to change.
In addition, when the target temperature M is changed to the low temperature side and the hot water temperature N is increased at the same time, the hot water storage control means D determines the magnitude of the decrease in the target temperature M to the low temperature side. When the temperature N is greater than the magnitude of the increase to the high temperature side, the unnecessary determination setting value J is changed to a large value Q, and the magnitude of the decrease in the target temperature M to the low temperature side is the tapping temperature N. If it is less than the magnitude of the increase to the high temperature side, the unnecessary determination setting value J is not changed.

Further, when the hot water storage control means D changes the unnecessary determination setting value J to the value Q having a large setting amount and executes the heating operation mode operation process, the auxiliary heating means A is operated at the minimum heating amount. When it is determined that the hot water supply temperature is higher than the target temperature M, a stop mode operation process is executed.
That is, in order to make the hot water supply temperature become the target temperature M when the auxiliary heating means A is operated at the minimum heating amount, the target mixing temperature L obtained by mixing hot water with the water mixing means B is obtained, If the mixing temperature V of hot water obtained when the water mixing means B is adjusted to the lowest temperature side is higher than the target mixing temperature L, the hot water supply temperature can be maintained even if the auxiliary heating means A is operated at the minimum heating amount. Although it is determined that the temperature is higher than the target temperature M, the specific configuration is the same as that of the first embodiment, and thus detailed description thereof is omitted.

In addition, the hot water storage control means D sets the auxiliary heating means A larger than the minimum heating amount when changing the unnecessary determination setting value J to the large setting value Q and executing the heating operation mode operation process. By operating at the heating amount H, the water mixing means B is controlled so that the hot water supply temperature becomes the target temperature M.
Further, the hot water storage control means D is not limited to executing the heating operation mode operation process by changing the unnecessary determination setting value J to the set value large value Q and always executing the heating operation mode operation process. The water mixing unit B is controlled so that the hot water supply temperature becomes the target temperature M by operating the auxiliary heating unit A at a set heating amount H larger than the minimum heating amount.

  The hot water temperature adjustment processing executed by the hot water storage control means D is the same as that in the first embodiment, and the description thereof is omitted.

Next, the control content of the hot water storage control means D will be described with reference to the flowcharts of FIGS.
First, it is determined whether or not the hot water has started, that is, whether or not the water flow rate W detected by the water volume sensor 23 is equal to or greater than the set water flow rate (# 21). If it is the start of hot water, it is determined whether it is within the set time from the previous stop, that is, within 3 minutes (# 22). If it is within 3 minutes from the previous stop, the previous heating operation mode is set. Is determined (# 23).
And when it is not within 3 minutes from the previous stop, or within 3 minutes from the previous stop, when the previous is not in the heating operation mode, the difference S between the hot water temperature N and the target temperature M is: It is determined whether or not it is equal to or less than the heating determination set value K (# 33). In the following cases, the heating operation mode operation processing is executed (# 36). Is executed (# 34).

  After executing the heating operation mode operation process in # 36, it is determined whether the hot water is being discharged, that is, whether or not the water flow amount W detected by the water amount sensor 23 is equal to or larger than the set water flow amount (# 37). ) When the hot water is being discharged, it is determined whether or not the difference S between the hot water temperature N and the target temperature M is equal to or higher than the unnecessary determination setting value J (# 38). Returning to the heating operation mode operation process step 36, and in the above case, the process proceeds to the stop mode operation process step # 34. If the hot water is not being discharged in # 37, stop processing such as stopping the operation of the water mixing means B is executed (# 31).

  After executing the stop mode operation process in # 34, it is determined whether the hot water is being discharged, that is, whether or not the water flow amount W detected by the water amount sensor 23 is equal to or greater than the set water flow amount (# 35). If the hot water is being discharged, the process returns to the process of # 33. If the hot water is not being discharged, a stop process such as stopping the operation of the water mixing means B is executed (# 31).

  If it is determined by # 22 and # 23 that the previous time is the heating operation mode within 3 minutes from the previous stop, the difference S between the tapping temperature N and the target temperature M is determined as unnecessary. It is determined whether or not the value Q is greater than the set value J greater than the set value J (# 24), and if the difference S is greater than or equal to the value Q greater than the set amount, the stop mode operation processing step # 34 is performed. Transition.

If the difference S between the tapping temperature N and the target temperature M is not equal to or greater than the set value large value Q, it is determined whether or not the difference S is equal to or greater than the unnecessary determination setting value J (# 25). Is equal to or greater than the unnecessary determination setting value J, it is determined whether or not the hot water temperature is raised and the target temperature is lowered (# 26), the hot water temperature is raised and the target temperature is lowered. If it is in the state, it is determined whether the magnitude of the decrease in the target temperature is greater than the magnitude of the rise in the tapping temperature (# 32), and the magnitude of the rise in the tapping temperature is greater. In this case, the process proceeds to the stop mode operation process of # 34.
If it is determined at # 26 that the tapping temperature has risen and the target temperature has not been lowered, it is determined whether or not the target temperature has decreased (# 27). If not, the process proceeds to the stop mode operation process of # 34.

  If it is determined at # 25 that the difference S is not equal to or greater than the unnecessary determination setting value J, it is determined at # 32 that the target temperature decrease is greater than the tapping temperature increase. If it is determined, and if it is determined in # 27 that the target temperature has decreased, the heating operation mode operation process is executed (# 28).

  Next, it is determined whether or not the hot water supply temperature is higher than the target temperature M even when the auxiliary heating means A is operated at the minimum heating amount (# 29). That is, it is determined whether or not the water flow rate W detected by the water flow sensor 23 is greater than or equal to the set water flow rate (# 30). If the hot water is not being discharged, stop processing such as stopping the operation of the water mixing means B is executed (# 31).

Incidentally, the hot water storage control means D, when starting the hot water, within 3 minutes from the previous stop and when it is determined that the previous time is the heating operation mode, at # 24, the hot water temperature N It is determined whether or not the difference S from the target temperature M is greater than or equal to a value Q that is larger than the unnecessary determination setting value J. The process proceeds to the stop mode operation processing step, and performing such processing corresponds to changing the unnecessary determination setting value J to a value Q having a large setting amount.
In the second embodiment, when the target temperature M is changed to the low temperature side, the hot water storage control means D changes the unnecessary determination setting value J to a value Q that is larger by a set amount, and when the hot water temperature N rises. Since the unnecessary determination setting value J is not changed, when it is determined that the target temperature M is changed to the low temperature side by the determination of # 27, the heating operation mode operation process is executed. Otherwise, that is, when it is determined that the hot water temperature N has risen to the high temperature side, stop mode operation processing is executed.

  In addition, in the second embodiment, the hot water storage control means D moves to the low temperature side of the target temperature M when the target temperature M is changed to the low temperature side and the hot water temperature N rises at the same time. If the magnitude of the decrease is equal to or greater than the magnitude of the hot water temperature N rising to the high temperature side, the unnecessary determination setting value J is changed to a large value Q, and the target temperature M decreases to the low temperature side. If the magnitude of the hot water temperature is less than the magnitude of the rise of the hot water temperature N to the high temperature side, the unnecessary discrimination setting value J is not changed, so that the target temperature is determined by the discrimination of # 26 and # 32. When M is changed to the low temperature side and the hot water temperature N is raised at the same time, the magnitude of the decrease of the target temperature M to the low temperature side is the magnitude of the rise of the hot water temperature N to the high temperature side. If it is determined that the above is true, the heating operation mode operation process is executed. If not, that is, if it is determined that the magnitude of the decrease in the target temperature M to the low temperature side is less than the magnitude of the rise in the hot water temperature N to the high temperature side, the stop mode operation process is executed. Will be.

[Third Embodiment]
Next, 3rd Embodiment which is embodiment of this invention is described based on drawing. The third embodiment corresponds to the fourth to ninth feature configurations.
In the third embodiment, the control content of the hot water storage control means D is different from that of the first embodiment described above, and the other configuration is the same as that of the first embodiment. The control contents will be described, and other descriptions will be omitted.

The hot water storage control means D detects the hot water temperature N from the hot water tank 1 as the hot water temperature N from the hot water tank 1, the detection information of the upper temperature sensor 22 that detects the upper temperature of the hot water tank 1, and the hot water state from the hot water path 2. Based on the detection information of the water amount sensor 23, when the water amount sensor 23 is in a water flow state that is equal to or greater than the set water flow amount, that is, when hot water is detected, the hot water supply channel 2 is detected based on the detection information of the upper temperature sensor 22. The auxiliary heating means A and the water mixing means B are operated so that the hot water supply temperature discharged from the hot water reaches the set target temperature M.

In other words, the hot water storage control means D does not require auxiliary heating so that hot water of the target temperature M can be discharged from the hot water supply passage 2 in a state where the relationship between the target temperature M and the hot water temperature N stops the operation of the auxiliary heating means A. In the state, the water mixing means B is controlled so that the hot water supply temperature becomes the target temperature M, and the stop mode operation process is executed to stop the auxiliary heating means A by instructing the auxiliary heating means A to stop. become.
Further, the hot water storage control means D instructs the auxiliary heating means A to send a heating command when the relationship between the target temperature M and the tapping temperature N is an auxiliary heating necessary state where the auxiliary heating means A needs to be operated. Heating for controlling the water mixing means so as to suppress the hot water supply temperature from becoming higher than the target temperature M by operating A to heat the hot water to the target temperature M and heating the auxiliary heating means A. The operation mode operation process is executed.
Then, as shown in FIG. 9, when the difference S between the hot water temperature N and the target temperature M becomes equal to or less than the heating discrimination set value K (for example, 2 ° C.), the hot water storage control means D is in the auxiliary heating necessary state. When the difference S between the tapping temperature N and the target temperature M is equal to or higher than the unnecessary determination setting value J (eg, 3 ° C.) that is larger than the heating determination setting value K, it is determined that the auxiliary heating is not required. It is configured.

Further, when the target temperature M is changed to the low temperature side when the heating operation mode operation process is executed, the hot water storage control means D changes the unnecessary determination setting value J to a larger value P (for example, 5 ° C.). Is configured to do.
When the target temperature M is changed to a low temperature side, the hot water storage control means D changes the unnecessary determination setting value J to a value P having a large set amount, and when the hot water temperature rises, the unnecessary determination setting value. J is configured not to change.
In addition, when the target temperature M is changed to the low temperature side and the hot water temperature N is increased at the same time, the hot water storage control means D determines the magnitude of the decrease in the target temperature M to the low temperature side. When the temperature N is higher than the magnitude of the increase to the high temperature side, the unnecessary determination setting value J is changed to a large value P for the set amount, and the magnitude of the decrease of the target temperature M to the low temperature side is the tapping temperature N. If it is less than the magnitude of the increase to the high temperature side, the unnecessary determination setting value J is not changed.

Further, when the hot water storage control means D changes the unnecessary determination setting value J to the setting value large value P and executes the heating operation mode operation process, the auxiliary heating means A is operated at the minimum heating amount. When it is determined that the hot water supply temperature is higher than the target temperature M, a stop mode operation process is executed.
That is, in order that the hot water supply temperature becomes the target temperature M when the auxiliary heating means A is operated at the minimum heating amount, a target mixing temperature L obtained by mixing hot water with the water mixing means B is obtained, If the mixing temperature V of hot water obtained when the mixing means B is adjusted to the lowest temperature side is higher than the target mixing temperature L, the hot water supply temperature is the target even if the auxiliary heating means A is operated at the minimum heating amount. Although it is determined that the temperature is higher than the temperature M, the specific configuration is the same as that of the first embodiment, and thus detailed description thereof is omitted.

In addition, the hot water storage control means D sets the auxiliary heating means A larger than the minimum heating amount when changing the unnecessary determination setting value J to the value P having a large setting amount and executing the heating operation mode operation process. By operating at the heating amount H, the water mixing means B is controlled so that the hot water supply temperature becomes the target temperature M.
Further, the hot water storage control means D is not limited to the case where the unnecessary determination setting value J is changed to the set value large value P and the heating operation mode operation processing is executed, but the heating operation mode operation processing is always performed. The water mixing unit B is controlled so that the hot water supply temperature becomes the target temperature M by operating the auxiliary heating unit A at a set heating amount H larger than the minimum heating amount.

  The hot water temperature adjustment processing executed by the hot water storage control means D is the same as that in the first embodiment, and the description thereof is omitted.

Next, the control content of the hot water storage control means D will be described with reference to the flowchart of FIG.
First, it is determined whether or not the hot water has started, that is, whether or not the water flow rate W detected by the water volume sensor 23 is equal to or greater than the set water flow rate (# 51). When it is the start of the hot water, it is determined whether or not the difference S between the hot water temperature N and the target temperature M is equal to or less than the heating determination set value K (# 52). An operation process is executed (# 53), and if not the following, a stop mode operation process is executed (# 64).

  After executing the stop mode operation process in # 64, it is determined whether the hot water is being discharged, that is, whether or not the water flow amount W detected by the water amount sensor 23 is equal to or greater than the set water flow amount (# 65). If the hot water is being discharged, the process returns to the process of # 52. If the hot water is not being discharged, a stop process such as stopping the operation of the water mixing means B is executed (# 63).

  After the heating operation mode operation process is executed in # 53, it is determined whether or not the difference S between the tapping temperature N and the target temperature M is equal to or greater than a value P that is larger than the unnecessary determination setting value J. (# 55) When the difference S is equal to or larger than the set amount large value P, the process proceeds to the stop mode operation process of # 64.

If the difference S between the tapping temperature N and the target temperature M is not equal to or greater than the set amount large value P, it is determined whether or not the difference S is equal to or greater than the unnecessary determination setting value J (# 56). Is equal to or higher than the unnecessary determination setting value J, it is determined whether or not the hot water temperature is raised and the target temperature is lowered (# 57), the hot water temperature is raised and the target temperature is lowered. If it is in the state, it is determined whether or not the magnitude of the decrease in the target temperature is larger than the magnitude of the rise in the hot water temperature (# 58), and the magnitude of the decrease in the hot water temperature is larger. In this case, the process proceeds to the stop mode operation process of # 64.
If it is determined at # 58 that the tapping temperature has risen and the target temperature has not been lowered, it is determined whether or not the target temperature has decreased (# 59). If not, the process proceeds to the stop mode operation process of # 63.

  If it is determined at # 56 that the difference S is not equal to or greater than the unnecessary determination setting value J, it is determined at # 58 that the decrease in the target temperature is greater than the increase in the tapping temperature. If it is determined, and if it is determined in # 59 that the target temperature has dropped, the heating operation mode operation process is executed (# 60).

  Next, it is determined whether or not the hot water supply temperature is higher than the target temperature M even if the auxiliary heating means A is operated at the minimum heating amount (# 61). That is, it is determined whether or not the water flow rate W detected by the water flow sensor 23 is equal to or larger than the set water flow rate (# 62). If the hot water is not being discharged, stop processing such as stopping the operation of the water mixing means B is executed (# 63).

Incidentally, after the hot water storage control means D starts executing the heating operation mode operation process of # 53, the difference S between the hot water temperature N and the target temperature M is greater than the unnecessary determination setting value J in # 56. It is determined whether or not the set amount is a large value P or more. If the difference S is greater than or equal to, the process proceeds to the stop mode operation process of # 64, and such a process can be performed. This corresponds to changing the unnecessary determination setting value J to the value P having a large setting amount.
In the third embodiment, when the target temperature M is changed to the low temperature side, the hot water storage control means D changes the unnecessary determination setting value J to a value Q having a larger set amount, and when the hot water temperature N rises. Since the unnecessary determination setting value J is not changed, when it is determined by the determination of # 59 that the target temperature M has been changed to the low temperature side, the heating operation mode operation process is executed. Otherwise, that is, when it is determined that the hot water temperature N has risen to the high temperature side, stop mode operation processing is executed.

  In addition, in the third embodiment, the hot water storage control means D moves to the low temperature side of the target temperature M when the target temperature M is changed to the low temperature side and the hot water temperature N rises at the same time. If the magnitude of the decrease is equal to or greater than the magnitude of the hot water temperature N rising to the high temperature side, the unnecessary determination setting value J is changed to a large value Q, and the target temperature M decreases to the low temperature side. If the magnitude of the hot water temperature is less than the magnitude of the rise of the hot water temperature N to the high temperature side, the unnecessary judgment setting value J is not changed, so that the target temperature is determined based on the judgments of # 57 and # 58. When M is changed to the low temperature side and the hot water temperature N is raised at the same time, the magnitude of the decrease of the target temperature M to the low temperature side is the magnitude of the rise of the hot water temperature N to the high temperature side. When it is determined that the above is true, the heating operation mode operation process is executed. If this is not the case, that is, if it is determined that the magnitude of the decrease of the target temperature M to the low temperature side is less than the magnitude of the rise of the tap water temperature N to the high temperature side, the stop mode operation process is executed. Will be.

[Another embodiment]
Hereinafter, another embodiment in which each part of the above embodiment is changed will be described.

  In the first to third embodiments, the hot water storage control means D is configured to issue a heating command and a stop command to the heating control means 19 of the auxiliary heating means A, so that the auxiliary heating means A and water are mixed. The control means for controlling the means B is exemplified by the case where the hot water storage control means D is the main part and is constituted by the hot water storage control means D and the heating control means 19, but the hot water storage control means D is the auxiliary heating means A. It is good also as a structure which controls the action | operation of.

  In the said 1st-3rd embodiment, although the upper temperature sensor 22 which detects the upper temperature of the hot water storage tank 1 was illustrated as a tapping temperature detection means, it flows through the part connected to the hot water storage tank 1 in the hot water supply channel 2. A temperature sensor that detects the temperature of the hot water may be provided.

  In the first to third embodiments, the water flow sensor 23 for detecting the water flow rate of the hot water supply channel 2 is exemplified as the hot water detection means. However, the water flow rate of the water supply channel 4 may be detected. Instead of a sensor that detects the amount of water, a water flow switch that detects whether or not the water flow rate is greater than or equal to a set amount may be provided.

  In the first to third embodiments, when the heating operation mode operation process is performed, the hot water supply temperature becomes the target temperature M by operating the auxiliary heating means A at a set heating amount H larger than the minimum heating amount. Although the case where the water mixing means B is controlled as described above is exemplified, the water mixing means B is controlled so that the hot water supply temperature becomes the target temperature M by operating the auxiliary heating means A with the minimum heating amount. May be.

  In the said 1st-3rd embodiment, although the case where the water mixing means B was comprised from two valves of the hot water supply path side adjustment valve 20 and the water supply path side adjustment valve 21, it illustrated on the hot water supply path side by one valve body. You may comprise with one valve of the form which adjusts an opening degree and the opening degree by the side of a water supply path.

  In the second embodiment, when the target temperature M is changed to the low temperature side, the unnecessary determination setting value J is changed to a value Q having a large setting amount, and when the tapping temperature N rises, the unnecessary determination setting value is set. Although the configuration is such that J is not changed, the unnecessary determination setting value J may be changed to a value Q having a large setting amount even when the tapping temperature N rises.

  In the second embodiment, when the target temperature M is changed to the low temperature side and the tapping temperature N rises at the same time, the magnitude of the decrease of the target temperature M to the low temperature side is the tapping temperature. If it is equal to or greater than the magnitude of the increase of N to the high temperature side, the unnecessary determination setting value J is changed to a large value Q for the set amount, and the magnitude of the decrease in the target temperature M to the low temperature side is When it is less than the magnitude of the increase to the high temperature side, the case where the unnecessary determination setting value J is not changed is exemplified, but the target temperature M is changed to the low temperature side and the tapping temperature N is When the increase occurs at the same time, the unnecessary determination setting value J may be changed to a value Q having a large setting amount.

  In the third embodiment, when the target temperature M is changed to the low temperature side, the unnecessary determination setting value J is changed to a value P having a large set amount, and when the tapping temperature N rises, the unnecessary determination setting value is set. Although the configuration is such that J is not changed, the unnecessary determination setting value J may be changed to a value P having a large setting amount even when the tapping temperature N rises.

  In the third embodiment, when the target temperature M is changed to the low temperature side and the tapping temperature N rises at the same time, the magnitude of the decrease in the target temperature M to the low temperature side is the tapping temperature. If it is equal to or greater than the magnitude of the increase of N to the high temperature side, the unnecessary determination setting value J is changed to a large value P for the set amount, and the magnitude of the decrease in the target temperature M to the low temperature side is the tapping temperature N When it is less than the magnitude of the increase to the high temperature side, the unnecessary determination setting value J is not changed, but the target temperature M is changed to the low temperature side and the tapping temperature N is increased. If both occur simultaneously, the unnecessary determination setting value J may be changed to a value P having a large setting amount.

  In the second and third embodiments, when the heating operation mode operation process is executed when the unnecessary determination setting value J is changed to a large setting value Q or P, the auxiliary heating means A is set to the minimum heating amount. Although the water mixing means B is controlled so that the hot water supply temperature becomes the target temperature M by operating at a larger set heating amount H, the unnecessary determination setting value J is set to a larger value Q or When changing to P, when the heating operation mode operation process is executed, the water mixing unit B is controlled so that the hot water supply temperature becomes the target temperature M by operating the auxiliary heating unit A with the minimum heating amount. You may comprise as follows.

  In the second and third embodiments, as a specific configuration for changing the unnecessary determination setting value J to the large setting amount value Q or P, the setting value J is added to the unnecessary determination setting value J to obtain a large value Q or A configuration in which P is obtained or a configuration in which a large value Q or P is stored in advance and the stored large value Q or P is used can be employed.

  As means for heating the hot water stored in the hot water tank 1, various means such as a combustion heat source, a heat pump, an electric heater, a fuel cell, etc. may be used in place of the power generator G provided with the gas engine 5. it can.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Hot water supply path 4 Water supply path 22 Hot water detection means 23 Hot water detection means A Auxiliary heating means B Water mixing means D Control means H Set heating amount J Setting value for unnecessary determination K Setting value M for heating determination Target temperature N Hot water Temperature P Large set value Q Large set amount S Difference

Claims (9)

Auxiliary heating means for heating hot water sent from the hot water tank and flowing through the hot water supply path;
A hot water temperature detecting means for detecting a hot water temperature from the hot water storage tank;
Water mixing means for mixing the water from the water supply passage into the hot water supply passage portion located between the auxiliary heating means and the hot water storage tank;
Hot water detection means for detecting the hot water state from the hot water supply path;
When the hot water detection means detects hot water, the auxiliary heating means and the auxiliary heating means so that the hot water temperature discharged from the hot water supply path becomes a set target temperature based on the detection information of the hot water temperature detection means. And a control means for operating the water mixing means,
The control means is
When the relationship between the target temperature and the tapping temperature is such that the hot water at the target temperature can be tapped from the hot water supply passage in a state where the operation of the auxiliary heating means is stopped, the hot water temperature is the target temperature. Controlling the water mixing means so as to be, and executing a stop mode operation process for stopping the auxiliary heating means, and
When the relationship between the target temperature and the tapping temperature is an auxiliary heating necessary state in which the auxiliary heating unit needs to be operated, the auxiliary heating unit is operated to heat the hot water to the target temperature, and the auxiliary heating unit is operated. A hot water storage type hot water supply apparatus configured to execute a heating operation mode operation process for controlling the water mixing means so as to suppress the hot water supply temperature from becoming higher than the target temperature by heating the heating means. There,
The control means is
When the difference between the tapping temperature and the target temperature is equal to or less than the heating determination set value, it is determined that the auxiliary heating is necessary, and the difference between the tapping temperature and the target temperature is larger than the heating determination setting value. It is configured to determine that the auxiliary heating is not required when the unnecessary determination setting value is exceeded, and
When the hot water supply from the hot water supply passage is stopped during the heating operation mode operation process, when the hot water supply from the hot water supply passage is started within the set time after the hot water supply stop, the unnecessary determination setting value is set. A hot water storage type hot water supply device configured to change the set amount to a large value.   When the target temperature is changed to a low temperature side, the control means changes the unnecessary determination setting value to a value larger by a set amount, and changes the unnecessary determination setting value when the tapping temperature rises. The hot water storage type hot water supply apparatus according to claim 1, wherein the hot water storage type hot water supply apparatus is configured not to be used.   In the case where the control means changes the target temperature to the low temperature side and the rise of the tapping temperature occurs at the same time, the magnitude of the decrease of the target temperature to the low temperature side is the tapping temperature. If it is equal to or greater than the magnitude of the increase to the high temperature side, the setting value for determining unnecessary is changed to a large value by a set amount, and the magnitude of the decrease in the target temperature to the low temperature side increases to the high temperature side of the tapping temperature. The hot water storage type hot water supply apparatus according to claim 1 or 2, wherein the unnecessary determination setting value is not changed when it is less than the magnitude of the increase. Auxiliary heating means for heating hot water sent from the hot water tank and flowing through the hot water supply path;
A hot water temperature detecting means for detecting a hot water temperature from the hot water storage tank;
Water mixing means for mixing the water from the water supply passage into the hot water supply passage portion located between the auxiliary heating means and the hot water storage tank;
Hot water detection means for detecting the hot water state from the hot water supply path;
When the hot water detection means detects hot water, the auxiliary heating means and the auxiliary heating means so that the hot water temperature discharged from the hot water supply path becomes a set target temperature based on the detection information of the hot water temperature detection means. And a control means for operating the water mixing means,
The control means is
When the relationship between the target temperature and the tapping temperature is such that the hot water at the target temperature can be tapped from the hot water supply passage in a state where the operation of the auxiliary heating means is stopped, the hot water temperature is the target temperature. Controlling the water mixing means so as to be, and executing a stop mode operation process for stopping the auxiliary heating means, and
When the relationship between the target temperature and the tapping temperature is an auxiliary heating necessary state in which the auxiliary heating unit needs to be operated, the auxiliary heating unit is operated to heat the hot water to the target temperature, and the auxiliary heating unit is operated. A hot water storage type hot water supply apparatus configured to execute a heating operation mode operation process for controlling the water mixing means so as to suppress the hot water supply temperature from becoming higher than the target temperature by heating the heating means. There,
The control means is
When the difference between the tapping temperature and the target temperature is equal to or less than the heating determination set value, it is determined that the auxiliary heating is necessary, and the difference between the tapping temperature and the target temperature is larger than the heating determination setting value. It is configured to determine that the auxiliary heating is not required when the unnecessary determination setting value is exceeded, and
A hot water storage type hot water supply apparatus configured to change the setting value for unnecessary determination to a value larger by a set amount when the target temperature is changed to a low temperature side during execution of the heating operation mode operation process.   When the target temperature is changed to a low temperature side, the control means changes the unnecessary determination setting value to a value larger by a set amount, and changes the unnecessary determination setting value when the tapping temperature rises. The hot water storage type hot water supply apparatus according to claim 4, wherein the hot water storage type hot water supply apparatus is configured not to be used.   In the case where the control means changes the target temperature to the low temperature side and the rise of the tapping temperature occurs at the same time, the magnitude of the decrease of the target temperature to the low temperature side is the tapping temperature. If it is equal to or greater than the magnitude of the increase to the high temperature side, the setting value for determining unnecessary is changed to a large value by a set amount, and the magnitude of the decrease in the target temperature to the low temperature side increases to the high temperature side of the tapping temperature. The hot water storage type hot water supply apparatus according to claim 4 or 5, wherein the unnecessary determination setting value is not changed when it is less than a rising magnitude.   When the control unit changes the unnecessary determination set value to a large set amount, when the heating operation mode operation process is executed, the auxiliary heating unit is set to a set heating amount larger than the minimum heating amount. The hot water storage type hot water supply apparatus according to any one of claims 1 to 6, wherein the water mixing means is controlled so that the hot water supply temperature becomes the target temperature by being operated.   Even when the auxiliary heating unit is operated at the minimum heating amount when the control unit executes the heating operation mode operation process when the unnecessary determination setting value is changed to a large setting amount, the hot water supply The hot water storage type hot water supply apparatus according to any one of claims 1 to 7, wherein when the temperature is determined to be higher than the target temperature, the stop mode operation process is executed.   In the heating operation mode operation process, the control unit controls the water mixing unit so that the hot water supply temperature becomes the target temperature by operating the auxiliary heating unit with a set heating amount larger than the minimum heating amount. The hot water storage type hot water supply apparatus according to any one of claims 1 to 8, wherein the hot water storage type hot water supply apparatus is configured to perform.

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