JP2007218518A - Hot water storage type water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an efficient operation while preventing an unnecessary boiling-up operation by controlling a start and stop of the boiling-up operation under conditions based on actual use feeling regardless of dimensions of a hot water storage tank. <P>SOLUTION: This hot water storage type water heater comprises a hot-water outage available hot water quantity setting means 34 for setting a start available hot water quantity for hourly determining the start of a hot-water outage boiling operation to optional values, the hot-water outage available hot water quantity setting means 34 has a learning control means 48 for changing the start available hot water quantity on the basis of a use history in a prescribed period, and the heating means 14 is started on the basis of the start available hot water quantity set by the hot-water outage available hot water quantity setting means 34 and the available hot water quantity calculated by the available hot water quantity calculating means 45. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a remaining hot water amount calculation device in a hot water storage type hot water supply apparatus that uses electric power to boil hot water.

  Conventionally, in hot water storage water heaters that use midnight power to boil the entire tank, all the water filled in the hot water tank is boiled in the midnight hours when electricity charges are cheap, and the daytime The general idea was to cover the hot water used. For this reason, the capacity of the hot water storage tank has been selected in accordance with the upper limit of the amount of hot water used in one day.

  And as a means for confirming how much hot water is stored in the hot water storage tank, a plurality of temperature detectors for detecting the internal temperature of the hot water storage tank, a lower limit temperature for hot water temperature, and lower than the lower limit temperature for water temperature Each detected temperature having an upper limit temperature and detected by the temperature detector is compared with the lower limit temperature and the upper limit temperature, and each detected temperature is equal to or higher than the lower limit temperature, between the lower limit and the upper limit temperature, or the upper limit temperature. In some cases, each detected temperature is displayed for each installation position of each of the temperature detectors (see, for example, Patent Document 1).

  In addition, ratio calculation means for calculating each detected temperature of the plurality of hot water storage temperature sensors as a ratio to the boiling target temperature, and graph information creation for graphing the remaining hot water amount based on each ratio calculated by the ratio calculation means And the graph information created by the graph information creating means are displayed in a graph on the display unit of the remote controller. Furthermore, a residual heat amount calculating means for calculating the residual heat amount in the hot water storage tank from the detected temperatures of a plurality of hot water storage temperature sensors, and a residual heat amount ratio calculation for calculating a ratio of the residual heat amount calculated by the residual heat amount calculating means to the target hot water storage heat amount And a ratio calculated by the remaining hot water amount ratio calculating means are displayed on the display unit of the remote controller as the remaining hot water amount (for example, see Patent Document 2).

Furthermore, in addition to the full-boiling operation during the midnight hours, a heat pump type hot water supply device that performs the boiling-out boiling operation during the daytime hours and performs the boiling operation to compensate for the lack of hot water during the full-boiling operation. Has been proposed. (For example, refer to Patent Document 3).
Japanese Utility Model Publication No. 4-50353 Japanese Patent Laid-Open No. 2004-360956 JP 2003-161545 A

  However, in the conventional hot water storage type hot water supply apparatus, a large hot water storage tank adapted to the upper limit of the amount of hot water used, for example, 360L or 420L is used to boil up using cheap late-night power of the electricity bill supplied at night, In general, there is a use form in which a large amount of hot water boiled with midnight electric power covers the amount of hot water used for one day.

  Therefore, as shown in Patent Documents 1 and 2 above, the remaining hot water display of the hot water storage tank is also displayed as it is at the detected temperature at each position of the hot water storage tank, displayed as a percentage of the target temperature, and further converted to the remaining heat amount. However, even if the state of the amount of hot water remaining in the hot water storage tank is displayed as it is, for example, it is displayed as a ratio to the target residual heat amount, there is no particular sense of incongruity.

However, in the configuration having a large hot water storage tank as in the conventional hot water storage type hot water supply apparatus, the outer shape of the product becomes large, a wide installation space is required, and installation in a narrow space in an apartment house or the like becomes difficult. In particular, there is a problem that the range of use is limited, especially when the trend toward a declining birthrate and a decrease in the number of families as in recent years, and the amount of hot water used per day does not require a large amount of hot water as in the past. In order to cope with this, the hot water storage type hot water supply apparatus in which the volume of the hot water storage tank is reduced and the equipment is miniaturized has been commercialized.

  In that case, the amount of hot water storage is drastically reduced compared to the conventional method, so that the amount of hot water used in the day cannot be covered with only the amount of hot water heated up in the middle of the night. It is necessary to secure a certain amount of hot water by frequently performing hot water boiling operation in the time zone.

  For this reason, since the hot water storage tank is in a hot water storage form that is almost always boiling, only a small amount of water remains in the hot water storage tank in the hot water tank during the midnight hours when the power charge is cheap. The ratio of boiling during high daytime hours increases, causing the problem of increased running costs.

  Furthermore, since the conditions for starting and stopping the conventional hot water boiling operation are determined using the amount of remaining effective hot water determined based on a predetermined reference temperature, the amount of heat retained by the amount of remaining effective hot water is determined. Regardless of the amount held, there was a problem that an unnecessary hot water boiling operation was performed in some cases.

  Further, when the volume of the hot water storage tank is reduced, the state of the hot water remaining in the hot water storage tank is displayed as it is to check the remaining hot water amount. For example, when the tank capacity is 100 L, a standard bathtub (200 L) is used. ), The user feels uncomfortable with the illusion that the amount of hot water is insufficient. Actually, since hot hot water is stored, there is no shortage of hot water, but the method of displaying the amount of hot water based on the tank capacity (100 L) is misleading to the user. In addition, the change in the amount of remaining hot water during the additional boiling operation or use of hot water during the daytime period can not be confirmed until the hot water temperature in the hot water storage tank has stabilized, It was inconvenient in terms of usability.

  The present invention solves the above problems, and based on the amount of heat stored in the hot water storage tank, the amount of heat used on the load side, and the amount of heat supplied from the heating means, respectively, the amount of hot water at the standard operating temperature under the same conditions. Convert, subtract and add to determine the latest available hot water volume in real time, and use the available hot water volume to boil out hot water based on the start / stop conditions that are set to reflect actual usage results By judging the start and stop of operation, unnecessary hot water boiling operation is prevented, and regardless of the size of the hot water storage tank, the user can intuitively just look at the value of the available hot water volume It is an object of the present invention to provide a hot water storage type hot water supply apparatus that can grasp the use state of hot water remaining in a hot water storage tank.

In order to achieve the above object, the present invention has a hot water storage tank, a load path for supplying hot water in the hot water storage tank to a load side, a heating means for heating the hot water in the hot water storage tank, and hot water in the hot water storage tank. Hot water amount calculating means for calculating the amount of hot water that can be used at a predetermined temperature from the amount of heat, usage amount calculating means for calculating the amount of hot water converted to a predetermined temperature from the amount of heat flowing out of the load path, and a predetermined temperature from the amount of heat flowing in from the heating means Supply amount calculating means for calculating the additional usable amount converted into the amount of usable hot water for calculating the amount of available hot water based on the amount of hot water determined from the calculation results of the hot water amount calculating means, the used amount calculating means, and the supply amount calculating means A calculation means is provided, and a time zone for performing a full-boiling operation is set, and when the predetermined usable hot water amount is calculated by the usable hot water amount calculation means, A hot water storage type hot water supply apparatus that is set to perform a hoisting operation, and has hot water useable hot water amount setting means for setting the startable hot water amount for determining the start of the hot water boiling operation to an arbitrary value according to time. The hot water useable hot water amount setting means has a learning function for changing the startable hot water amount based on the usage record for a predetermined period, and the startable hot water amount set by the hot water useable hot water amount setting means. The heating means is started and stopped based on the usable hot water amount calculated by the usable hot water amount calculating means.

  According to the above invention, the amount of heat held by the hot water stored in the hot water storage tank is obtained, and how much hot water can be used when the hot water is continuously discharged from the amount of heat that is normally used (for example, 40 ° C.). Therefore, it is easy to determine how much hot water can be used under standard operating conditions with the amount of hot water stored, regardless of the size of the hot water tank. It can be used appropriately according to the amount of hot water that can be used. In addition, the amount of heat consumed by the hot water supply curan, bath hot water circuit, and bath reheating circuit connected to the load path is obtained, and the hot water temperature (for example, 40 ° C.) under the same conditions as when the usable hot water amount is obtained from the heat amount. The amount of hot water used is converted into the amount of hot water used to indicate the amount of hot water used, so by subtracting the amount of hot water used from the amount of hot water available, the current usage is linked to the consumption status of the load path. The change in the amount of hot water can be confirmed in real time, and the user can easily confirm how much can be used while observing the change, thereby improving the usability. Furthermore, when the amount of stored hot water is reduced and the heating means is operated and the additional boiling operation is started, the amount of heat supplied from the heating means is obtained, and the hot water temperature under the same conditions as when the amount of usable hot water is obtained from the amount of heat ( For example, 40 degrees Celsius) is converted into an additional usable hot water amount that indicates how much hot water has been supplied. Therefore, the heating means is heated up by adding the additional usable hot water amount to the usable hot water amount. In response to the change in the amount of hot water that can be used in real time, the user can easily check how much can be used while observing the change and can improve the ease of use. .

  Then, with respect to the usable heat amount converted from the stored heat amount of the hot water storage tank, the current usable hot water amount obtained by subtracting / adding the used hot water amount and the supplied hot water amount calculated by the used amount calculating means and the supplied amount calculating means is calculated. Using the actual usage within a predetermined period by reflecting the learning control and comparing it with the startable hot water amount set by the hot water available hot water amount setting means, so as to determine the start of the hot water boiling operation Therefore, the user can determine whether or not the hot water boiling operation is necessary as if he / she actually used hot water. The problem that unnecessary hot water boiling operation is performed in the case of hot water can be solved, and the set value of the amount of hot water that can be used for starting is set as the starting condition. Since it is set based on the actual usage record for each hour in the time zone, even if the hot water storage tank is downsized to reduce the installation space and initial cost, the daily hot water usage will be changed It is possible to secure the optimal amount of hot water that can be used, and to ensure an efficient boiling operation without wasteful hot water boiling operation. Problems such as running out of hot water and remaining hot water due to changes in hot water usage can be solved.

  Furthermore, the required amount of hot water can be secured in advance corresponding to the hot water filling operation in which a large amount of hot water is used, and the hot water after the hot water filling operation is started early by starting the hot water boiling operation during the hot water filling operation. The cutting phenomenon can be eliminated. In other words, boiling during the daytime power supply time is minimized to prevent running out of hot water, and water that should be boiled during the midnight hours can be secured in the hot water storage tank, thus minimizing the running cost increase. Can do. And when optimizing the installation space, initial cost and running cost, the running cost increase due to the miniaturization of the hot water storage tank can be reduced, so the capacity of the hot water storage tank can be reduced and the total cost reduction In addition, the installation can be improved.

As described above, based on the amount of heat stored in the hot water storage tank, the amount of heat used on the load side, and the amount of heat supplied from the heating means, it is converted into the amount of hot water at the standard operating temperature under the same conditions, and subtracted / added. Performs processing to obtain the latest available hot water volume in real time, and uses the available hot water volume to determine the start of hot water boiling operation based on the start conditions set by reflecting the actual usage within a predetermined period by learning control In this way, unnecessary hot water boiling operation can be prevented, and regardless of the size of the hot water storage tank, the current usable hot water volume can be known as a temperature condition or a value close to it. Since the person can intuitively grasp the usage state of the hot water remaining in the hot water storage tank by simply looking at the value, the usability can be greatly improved.

  Therefore, even if the capacity of the hot water storage tank is, for example, about 100 L smaller than a general bathtub volume (200 L), the available hot water volume can be calculated as 300 L, and the value can be displayed. Can see that the value of the hot water can be filled in the bathtub, and after the hot water filling in the bathtub is finished, it can be confirmed in real time that the amount of available hot water has decreased to 100L. When the raising operation is started, it is possible to confirm in real time that the amount of hot water that can be used gradually increases from 100 L, and in particular, as a remaining hot water amount confirmation device for a hot water storage hot water supply device having a small hot water storage tank capacity. It is the best one.

  According to the present invention, based on the amount of heat stored in the hot water storage tank, the amount of heat used on the load side, the amount of heat supplied from the heating means, each is converted into the amount of hot water at the standard operating temperature under the same conditions, Addition processing is performed to obtain the latest available hot water volume in real time, and it is unnecessary to use the available hot water volume to determine the start of hot water boiling operation based on the conditions set based on the actual usage record. It is possible to know the current amount of hot water that can be used as a temperature condition or a value close to it, regardless of the size of the hot water storage tank, and the user sees that value. It is possible to intuitively grasp the usage status of hot water remaining in the hot water storage tank, so that the usability can be dramatically improved. In particular, it is optimal as a remaining hot water amount confirmation device for a hot water storage type hot water supply device having a small hot water storage tank capacity.

  1st invention is a predetermined temperature from the hot water storage tank, the load path which supplies the hot water of the said hot water storage tank to the load side, the heating means which heats the hot water of the said hot water storage tank, and the amount of heat which the hot water of the said hot water storage tank holds Hot water amount calculating means for calculating the amount of hot water available, usage amount calculating means for calculating the amount of hot water converted to a predetermined temperature from the amount of heat flowing out of the load path, and additional use converted to a predetermined temperature from the amount of heat flowing from the heating means A supply amount calculating means for calculating a possible amount; and a usable hot water amount calculating means for calculating a usable hot water amount based on the amount of hot water determined from the calculation results of the hot water amount calculating means, the used amount calculating means and the supply amount calculating means, A time zone for performing the total boiling operation is set, and when the predetermined usable hot water amount is calculated by the usable hot water calculation means, the hot water boiling operation is performed. A hot water storage type hot water supply apparatus, comprising: a hot water useable hot water amount setting means for setting a startable hot water amount for determining the start of the hot water boiling operation to an arbitrary value by time, and the hot water use The available hot water volume setting means has a learning function for changing the startable hot water volume based on the usage results for a predetermined period, and the startable hot water volume set by the hot water available hot water volume setting means and the available hot water volume calculation The heating means is activated based on the amount of usable hot water calculated by the means.

The amount of heat held by the hot water stored in the hot water storage tank can be obtained, and the amount of hot water that can be used when the hot water is discharged continuously at the standard hot water temperature (eg 40 ° C) can be used. Since it is converted to the amount of hot water, it can be easily determined and used regardless of the size of the hot water storage tank, and the amount of hot water stored can be used under standard operating conditions. Appropriate usage according to the amount of hot water becomes possible. In addition, the amount of heat consumed by the hot water supply curan, bath hot water circuit, and bath reheating circuit connected to the load path is obtained, and the hot water temperature (for example, 40 ° C.) under the same conditions as when the usable hot water amount is obtained from the heat amount. The amount of hot water used is converted into the amount of hot water used to indicate the amount of hot water used, so by subtracting the amount of hot water used from the amount of hot water available, the current usage is linked to the consumption status of the load path. A change in the amount of hot water can be confirmed in real time, and the user can easily confirm how much can be used while observing the change, thereby improving usability. Furthermore, when the amount of stored hot water is reduced and the heating means is operated and the additional boiling operation is started, the amount of heat supplied from the heating means is obtained, and the hot water temperature under the same conditions as when the amount of usable hot water is obtained from the amount of heat ( For example, 40 degrees Celsius) is converted into an additional usable hot water amount that indicates how much hot water has been supplied. Therefore, the heating means is heated up by adding the additional usable hot water amount to the usable hot water amount. In response to the change in the amount of hot water that can be used in real time, the user can easily check how much can be used while observing the change and can improve the ease of use. .

  Then, with respect to the usable heat amount converted from the stored heat amount of the hot water storage tank, the current usable hot water amount obtained by subtracting / adding the used hot water amount and the supplied hot water amount calculated by the used amount calculating means and the supplied amount calculating means is calculated. Using the actual usage within a predetermined period by reflecting the learning control and comparing it with the startable hot water amount set by the hot water available hot water amount setting means, so as to determine the start of the hot water boiling operation Therefore, the user can determine whether or not the hot water boiling operation is necessary as if he / she actually used hot water. The problem that unnecessary hot water boiling operation will be performed in the case of hot water can be solved, and the set value of the amount of hot water that can be used for startup is set in the time zone when hot water boiling operation is performed. Each time is set based on actual usage results, so even if the hot water storage tank is downsized to reduce the installation space and initial cost, it is optimal for the daily hot water usage. The amount of hot water that can be used can be secured, and efficient boiling operation can be ensured without wasteful hot water boiling operation. Problems such as running out of hot water and remaining hot water due to the change of the temperature can be solved. Furthermore, the required amount of hot water can be secured in advance corresponding to the hot water filling operation in which a large amount of hot water is used, and the hot water after the hot water filling operation is started early by starting the hot water boiling operation during the hot water filling operation. The cutting phenomenon can be eliminated. In other words, boiling during the daytime power supply time is minimized to prevent running out of hot water, and water that should be boiled during the midnight hours can be secured in the hot water storage tank, thus minimizing the running cost increase. Can do. And when optimizing the installation space, initial cost and running cost, the running cost increase due to the miniaturization of the hot water storage tank can be reduced, so the capacity of the hot water storage tank can be reduced and the total cost reduction In addition, the installation can be improved.

  As described above, based on the amount of heat stored in the hot water storage tank, the amount of heat used on the load side, and the amount of heat supplied from the heating means, it is converted into the amount of hot water at the standard operating temperature under the same conditions, and subtracted / added. Performs processing to obtain the latest available hot water volume in real time, and uses the available hot water volume to determine the start of hot water boiling operation based on the start conditions set by reflecting the actual usage within a predetermined period by learning control In this way, unnecessary hot water boiling operation can be prevented, and regardless of the size of the hot water storage tank, the current usable hot water volume can be known as a temperature condition or a value close to it. Since the person can intuitively grasp the usage state of the hot water remaining in the hot water storage tank by simply looking at the value, the usability can be greatly improved.

Therefore, even if the capacity of the hot water storage tank is, for example, about 100 L smaller than a general bathtub volume (200 L), the available hot water volume can be calculated as 300 L, and the value can be displayed. Can see that the value of the hot water can be filled in the bathtub, and after the hot water filling in the bathtub is finished, it can be confirmed in real time that the amount of available hot water has decreased to 100L. When the raising operation is started, it is possible to confirm in real time that the amount of hot water that can be used gradually increases from 100 L, and in particular, as a remaining hot water amount confirmation device for a hot water storage hot water supply device having a small hot water storage tank capacity. It is the best one.

  In a second aspect of the invention, in particular, in the first aspect of the invention, the hot water amount calculating means can be used by obtaining the amount of heat held for each layer from the temperatures detected by a plurality of temperature detectors provided in the hot water storage tank and converting it to a predetermined temperature. The hot water amount is calculated, and when the temperature detected by the temperature detector is equal to or lower than a predetermined determination temperature, it is determined that there is no remaining hot water and is not added to the usable hot water amount. .

  And in the stacked type hot water storage system that circulates the water in the lower part of the hot water storage tank to the upper part and heats it in the circulation process to store hot water in layers from the upper part of the tank, By determining the amount of heat stored in each layer based on the temperature detected by the temperature detector, the stored heat amount of the hot water storage tank can be accurately detected, and it can be used at the standard temperature from the stored heat amount The amount of hot water can be determined. In addition, when it is determined that the temperature detected by the temperature detector is low and is not suitable as a standard operating temperature, it is not added to the amount of hot water that can be used, so the amount of hot water that can be used in a predetermined operating condition is accurately obtained. be able to.

  The third invention is characterized in that, in particular, in the first or second invention, the hot water amount calculating means calculates the usable hot water amount while leaving a predetermined hot water amount above the hot water storage tank.

  And since the predetermined amount at the upper part of the hot water storage tank is not added to the amount of hot water that can be used, even if an error occurs during the heat amount calculation, the error amount is covered by the amount of hot water at the upper part of the tank, so that the calculation result with the hot water amount is obtained. On the other hand, the situation where there is no actual amount of hot water can be avoided.

  According to a fourth aspect of the invention, in particular, in any of the first to third aspects of the invention, the hot water amount calculating means has / without remaining hot water based on a temperature detected by the temperature detector and a determination temperature for determining the presence or absence of the remaining hot water. When it is detected that the information has been switched, the amount of usable hot water is calculated.

  When it is determined that the temperatures detected by the plurality of temperature detectors provided in the hot water storage tank are not suitable as standard operating temperatures, or when it is determined that the temperature has returned to an appropriate temperature, the hot water storage tank is again used at that time. The amount of heat that is stored is calculated and converted to a usable hot water amount that indicates how much hot water can be used when the hot water is used at the standard hot water temperature. It is possible to verify the change in the amount of hot water that can be used at a predetermined timing when the hot water is used or when the boiling operation is performed, and the amount of hot water that can be used can be accurately obtained.

  In a fifth aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, the usage amount calculating means flows out from a flow rate and a tapping temperature detected by a flow rate detector and a tapping temperature detector provided in the load path. The amount of heat is calculated and the amount used is converted to a predetermined temperature, and the amount of usable hot water obtained by the hot water amount calculating means is subtracted and corrected.

Then, based on the flow rate and the hot water temperature detected by the flow rate detector and the hot water temperature detector provided in the hot water supply circuit connected to the currant constituting the load path and the bath hot water circuit connected to the bathtub water circulation circuit, the hot water supply and bath Since the amount of heat used during hot water filling is calculated and converted to the amount of hot water used under the same temperature conditions as when the amount of hot water that can be used is calculated from that amount of heat, the amount of hot water used in the load path can be obtained accurately. By using this amount of hot water to perform subtraction correction of the available hot water amount obtained by the hot water amount calculation means, the current available hot water amount can be obtained in real time. Since changes can be confirmed, usability can be improved.

  In a sixth aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, the usage amount calculation means obtains the usage amount converted to a predetermined temperature by obtaining the amount of heat used in the bath reheating circuit provided in the load path. In addition to the calculation, subtraction correction of the available hot water amount obtained by the hot water amount calculating means is performed.

  And the flow rate of the circulation pump provided in the bath reheating circuit that is configured by arranging the bath heat exchanger that exchanges heat with the bath water in the middle of the circulation path that returns the hot water taken out from the upper part of the hot water tank, and the hot water tank The amount of heat used in the bath heat exchanger is obtained from the outlet temperature and return temperature from the air, and converted to the amount of hot water used under the same temperature conditions as when the amount of usable hot water is obtained from the amount of heat. The hot water equivalent value used in the bath chase circuit to be configured can be obtained with high accuracy, and by subtracting the usable hot water amount calculated by the hot water amount calculation means using this hot water equivalent value, the current available hot water amount can be obtained. Can be obtained in real time, and the user can confirm the change in the amount of hot water that can be used in conjunction with the bath-chasing operation state, so that the usability can be improved.

  In a seventh aspect of the present invention, in particular, in any one of the first to fourth aspects of the invention, the supply amount calculation means obtains the amount of boiling every predetermined time when the boiling operation is started, and supplies the converted amount to a predetermined temperature. While calculating the amount of hot water, addition correction of the amount of usable hot water obtained by the hot water amount calculating means is performed.

  Then, when the heating operation by the heating means is started, the amount of boiling for each predetermined time is determined from the heating capacity, the boiling temperature and the feed water temperature at that time, and the amount of usable hot water is determined from the amount of boiling. Since it is converted to the amount of hot water that can be used for additional hot water under the same temperature conditions, the amount of hot water that can be additionally used supplied from the heating means can be obtained with high accuracy. By adding and correcting the available hot water amount obtained by the means, the current available hot water amount can be obtained in real time, and the user should confirm the change in the available hot water amount linked to the heating operation state by the heating means. Therefore, usability can be improved.

  According to an eighth aspect of the invention, particularly in the seventh aspect of the invention, the supply amount calculating means changes the heating capacity in accordance with the temperature of incoming water to the variable capacity heating means, obtains the amount of boiling every predetermined time, and sets it to the predetermined temperature. The converted hot water volume is calculated.

  And when the heating capacity is changed according to the incoming water temperature, such as decreasing the heating capacity as the incoming water temperature supplied to the heating means increases and increasing the heating capacity as the incoming water temperature decreases. Because the boiling amount is calculated based on the changed heating capacity, and the amount of hot water that can be used is calculated from the amount of boiling, the amount of hot water that can be additionally used in the same temperature condition is converted into the amount of hot water that can be used. The amount of additional usable hot water supplied from the heating means can be obtained with high accuracy, and the current amount of available hot water can be determined by performing addition correction of the amount of usable hot water obtained by the hot water amount calculating means using this additional usable hot water amount. It can be obtained in real time, and the user can check the change in the amount of hot water that can be used in conjunction with the heating operation state by the heating means, thus improving usability Door can be.

According to a ninth aspect of the invention, in the seventh aspect of the invention, in particular, the supply amount calculating means changes the heating capacity in accordance with the heating operation mode of the variable capacity heating means, obtains the amount of heating per predetermined time, and determines the predetermined temperature. It is characterized in that the amount of supplied hot water converted into the above is calculated.

  And according to the boiling operation mode, the total boiling-up operation performed at a specific time zone at night is the normal capacity, and the additional boiling operation performed when the remaining hot water volume is reduced during the daytime period is the high power capability. When the heating capacity is changed, the amount of boiling water is calculated based on the changed heating capacity, and the amount of hot water supplied becomes the amount of additional hot water that can be used under the same temperature conditions as when the amount of usable hot water is calculated from the amount of boiling. Since the conversion is performed, the amount of additional usable hot water supplied from the heating means can be obtained with high accuracy, and by using this additional usable hot water amount, addition correction of the usable hot water amount obtained by the hot water amount calculating means is performed. The amount of hot water that can be used can be obtained in real time, and the user can check the change in the amount of hot water that can be used in conjunction with the heating operation by the heating means. Because, it is possible to improve the usability of.

  According to a tenth aspect of the invention, in particular, in any one of the first to ninth aspects of the invention, the usable hot water amount calculating means is a usage amount determined by the usage amount calculating means with respect to the usable hot water amount determined by the hot water amount calculating means. The present invention is characterized in that the current usable hot water amount is constantly updated by performing subtraction correction and addition correction with the amount of hot water obtained by the supply amount calculating means.

  Based on the amount of heat stored in the hot water storage tank, the amount of heat used on the load side, and the amount of heat supplied from the heating means, it is converted into the amount of hot water at the standard operating temperature under the same conditions, and subtraction / addition processing is performed. Since the latest available hot water volume is calculated in real time, regardless of the size of the hot water storage tank, the current available hot water volume can be known as the actual temperature condition or a value close to it. The usage status of the hot water remaining in the hot water tank can be grasped intuitively only by looking at the value, so that the usability can be dramatically improved.

  In the eleventh aspect of the invention, in particular, in any one of the first to tenth aspects of the invention, the hot water useable hot water amount setting means can be used for start-up as the frequency of use within a predetermined period falls below the amount of hot water available for start-up. It has a learning function of changing so that the amount of hot water increases.

  And, in the time period from morning to evening when the amount of hot water used is small, the startable hot water amount that is the start condition of the hot water boiling operation is set to the minimum value, and the condition that makes it difficult to enter the boiling operation is set. If the frequency that falls below the set value increases within the period, learning control is performed so as to change the value higher, and the amount of hot water that can be used in accordance with the actual use is set, thereby suppressing unnecessary boiling operation. Also, in the time zone that includes the bath filling operation from the evening when the amount of hot water used increases, the startable hot water amount that is the start condition of the hot water boiling operation is set to the maximum value, and the condition that makes it easy to enter the heating operation is set At the same time, as described above, the learning control is performed so that if the frequency falls below the set value within a predetermined period increases, the learning control is performed so that the amount of hot water that can be used for starting is set in accordance with the actual use condition. The hot water boiling operation during the tensioning operation can be performed reliably, and the hot water phenomenon after the hot water tensioning operation can be eliminated.

  In a twelfth aspect of the invention, in particular, in any one of the first to tenth aspects of the invention, the hot water useable hot water volume setting means changes the time for setting the amount of hot water that can be used for activation based on the usage record for a predetermined period. It is characterized by having.

  And, in the preset start / stop condition pattern by time, when the life pattern changes, the time to change the amount of hot water available for start-up according to the life pattern is determined by learning control based on the usage record for a predetermined period It is designed to adjust the amount of hot water in accordance with the actual usage.

  In a thirteenth aspect of the invention, particularly in any one of the first to twelfth aspects of the invention, the hot water useable hot water amount setting means is set so that the maximum usable amount of activation is maximized in a time zone in which a bath hot water filling operation is performed. It is characterized by that.

  Then, in the time period when the bath hot water filling operation in which a large amount of hot water is used is performed, the startable hot water amount that is the start condition of the hot water boiling operation is set to the maximum value, and the condition that makes it easy to enter the boiling operation is set. Therefore, the amount of hot water necessary for the hot water filling operation can be secured, and the hot water boiling operation during the hot water filling operation can be surely performed to eliminate the hot water phenomenon after the hot water filling operation is completed. it can.

  In a fourteenth aspect of the invention, in particular, in any one of the first to thirteenth aspects of the invention, the heating means is a heat pump cycle in which a compressor, a radiator, an expansion valve, and an evaporator are connected by piping. The capacity of the compressor is increased during the hot water boiling operation.

  And when the amount of remaining hot water decreases and it becomes necessary to secure the required amount of hot water urgently, it is possible to store a predetermined amount of hot water in a short time by increasing the capacity of the compressor and performing a hot water boiling operation. it can.

  In a fifteenth aspect of the invention, particularly in any one of the first to fourteenth aspects of the invention, the heating means is a heat pump cycle in which a compressor, a radiator, an expansion valve, and an evaporator are connected by piping, and is used for the heat pump cycle. The refrigerant is carbon dioxide, and the high pressure side is operated in a state exceeding the critical pressure.

  Further, hot water close to 90 ° C. can be stored, and hot water of about 65 ° C. considering Legionella bacteria can be stored at a high COP.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is a block diagram showing an overall configuration of a hot water storage type hot water supply apparatus according to a first embodiment of the present invention.

  A hot water supply pipe 2 for supplying high-temperature hot water to a plurality of loads is provided at the upper part of the hot water storage tank 1. The hot water supply pipe 2 a serves as a hot water supply path to the currant 24, and the hot water supply pipe 2 b serves as a hot water supply path to the hot water filling circuit 19 a. A hot water discharge pipe 2c is provided as a hot water supply route to the circuit 29a. A hot water storage tank 1 has a water supply pipe 3 connected to a pressure reducing valve 3a and a check valve 3b.

  The hot water supplied from the hot water discharge pipe 2 a is mixed with the water supplied from the water supply pipe 3 and the hot water mixing valve 20 to the set temperature, and then discharged from the currant 24. The flow rate discharged from the hot water is detected by the flow rate detector 22, the hot water temperature after mixing is detected by the hot water temperature detector 21, and the detected data is fed back to the mixing control of the hot water supply mixing valve 20 to thereby set the hot water at the set temperature. Like to get. In addition, it is possible to calculate the amount of heat used at the time of Karan hot water using the detection data.

The hot water supplied from the hot water outlet pipe 2b is mixed with the water supplied from the water supply pipe 3 and the set temperature by the bath mixing valve 15 by opening the opening / closing valve 17, and then the bath water circulation path 31 is supplied from the bath hot water filling circuit 19a. It is supplied to the bathtub 30 via. At this time, the flow rate of the hot water filling circuit 19a is detected by the flow rate detector 18, the hot water temperature after mixing is detected by the hot water temperature detector 16, and this detection data is fed back to the mixing control of the bath mixing valve 15. While obtaining hot water of set temperature, the amount of hot water supplied to the bathtub 30 is calculated | required. It is also possible to calculate the amount of heat used when bathing with the detection data.

  Hot water supplied from the tapping pipe 2c is returned to the lower part of the hot water storage tank 1 through a recirculation circuit 29a by a circulation pump 27 through a recirculation circuit 29a. The bath reheating operation is performed by exchanging heat with the bathtub water flowing through the water circulation path 31. At this time, the outlet temperature of the bath heat exchanger 26 is detected by the temperature detector 28, and the inlet temperature is substituted with the temperature detected by the temperature detector 7 d attached to the uppermost part of the hot water storage tank 1. Furthermore, the circulation flow rate can be substituted by using the control data of the circulation pump 27, and the amount of heat used in the bath reheating operation can be obtained from the above inlet temperature, outlet temperature, and circulation flow rate.

  As described above, the hot water stored in the hot water storage tank 1 is supplied from the hot water discharge pipes 2 a, 2 b, 2 c and consumed by the load circuit composed of the hot water supply means 25, the bath hot water filling means 19, and the bath reheating means 29. The

  Next, the structure of the hot water storage tank 1 will be described. The lower part and the upper part of the hot water storage tank 1 are communicated with each other by a boiling pipe 4, and the water in the lower part of the hot water storage tank 1 is led to a heat exchanger 6 by a boiling pump 5. Then, it is heated by the heat exchanger 6 to become hot water, and is led to the upper part of the hot water storage tank 1. When the hot water is discharged from the hot water discharge pipe 2, water is supplied from the water supply pipe 3 into the hot water storage tank 1, and in the hot water storage tank 1, the hot water is separated into the upper part and the water is separated into the lower part due to the difference in specific gravity. Accumulated in layers.

  The hot water storage tank 1 is provided with a plurality of remaining hot water temperature detectors 7 for detecting the hot water temperature from the lower part of the hot water storage tank 1 at each position. Here, the remaining hot water temperature detector 7 a disposed at the bottom of the hot water storage tank 1, the remaining hot water temperature detector 7 b disposed above the remaining hot water temperature detector 7 a, and the uppermost portion of the hot water storage tank 1 are disposed. The remaining hot water temperature detector 7d and a remaining hot water temperature detector 7c disposed below the remaining hot water temperature detector 7d are provided. For example, if the total capacity of the hot water storage tank 1 is 150L, the remaining hot water temperature detector 7a is disposed at a position of 130L, and when the remaining hot water temperature detector 7a detects the hot water temperature above a predetermined temperature, the hot water storage tank 1 has a remaining hot water amount detection function for determining that 130 L or more is stored as the available hot water amount. Similarly, the remaining hot water temperature detector 7b is disposed at a position of 100L, and when the remaining hot water temperature detector 7b detects a hot water temperature of a predetermined temperature or higher, the amount of hot water that can be used in the hot water storage tank 1 is 100L or higher. Judged to be stored. Further, the remaining hot water temperature detector 7c is disposed at a position of 50L and the remaining hot water temperature detector 7d is disposed at a position of 20L, and outputs signals for determining whether 50L and 20L are stored as the remaining hot water amounts, respectively. As a criterion for determining the amount of remaining effective hot water, for example, it is determined that there is no remaining hot water when each of the remaining hot water temperature detectors 7a, 7b, 7c, 7d falls below 45 ° C, and the detected temperature is, for example, 60 ° C or higher or When the set temperature is reached, it is determined that there is a remaining amount of hot water. That is, the remaining hot water temperature detectors 7a, 7b, 7c, and 7d are installed positions of the remaining hot water amount detectors 7d, 7c, 7b, and 7a arranged at the respective positions when the detected temperature is, for example, 60 ° C. or higher or the set temperature. There is hot water until it falls below 45 ° C, and it is determined that there is no hot water. Chattering is prevented by using 45 ° C. and 60 ° C. or a set temperature as a judgment temperature.

  Next, the heating means 14 constituting the heat source will be described. The heating means 14 is constituted by a heat pump cycle in which the compressor 10, the radiator 6, the expansion valve 12, and the evaporator 11 are connected by piping. This heat pump cycle preferably uses carbon dioxide as a refrigerant and is operated in a state exceeding the critical pressure on the high pressure side. By using such a heat pump cycle, hot water close to 90 ° C. can be stored, and hot water storing about 65 ° C. considering Legionella bacteria can be stored at a high COP.

  An incoming water temperature detector 13 a is provided in the boiling pipe 4 leading to the heat exchanger 6, and a tapping temperature detector 13 b is provided in the boiling pipe 4 on the outlet side of the heat exchanger 6. Moreover, the hot water storage type hot water supply apparatus according to the present embodiment includes an outside air temperature detector 13c that detects the outside air temperature. The three-way valve 8 connected to the heating pipe 4 changes the heating path. When the hot water temperature is not rising at the beginning of the heating, the heating path is switched to the lower part of the hot water storage tank 1 to circulate the hot water. When the temperature detector 13b detects a predetermined temperature, the three-way valve 8 is switched to the upper part of the hot water storage tank 1 to store hot water at a set temperature. The three-way valve 8 can also be used for anti-freezing operation by switching to the lower part of the hot water storage tank 1 and circulating it when the outside air temperature is extremely low.

  In the above configuration, during the boiling operation, the boiling pump 5 and the compressor 10 are operated.

  For example, when the boiling temperature is 90 ° C., the boiling pump 5 is adjusted to an appropriate flow rate and controlled so that the temperature of the tapping temperature detector 13b becomes 90 ° C. The temperature of the tapping water can also be controlled by controlling the heat pump cycle such as the rotational speed of the compressor 10 and the opening degree of the expansion valve 12. With the above operation, hot water of 90 ° C. is stored in the hot water storage tank 1 in order from the top, and when the incoming water temperature detector 13a detects a predetermined temperature, for example, 60 ° C., the hot water of 90 ° C. has reached the lower part of the hot water storage tank 1. Judgment is made, the boiling pump 5 and the compressor 10 are stopped, and the boiling operation is finished.

  Moreover, in the hot water storage type hot water supply apparatus according to the present embodiment, a first predetermined time zone and a second predetermined time zone are set. The first predetermined time zone is, for example, a midnight time zone from 23:00 to 7 o'clock, which includes a time zone in which the heating means 14 is operated and the whole amount heating operation is performed, and includes a peak shift time zone. . The peak shift time zone is a time zone in which the entire amount boiling operation is waited. The second predetermined time zone is, for example, a daytime time zone from 7 o'clock to 23 o'clock, and as a general rule is a time zone during which no full-boiling operation is performed. In this peak shift time zone and the second predetermined time zone, the hot water boiling operation is performed when it is determined that the amount of hot water is insufficient in the full-boiling operation performed in the first predetermined time zone.

  The hot water storage type hot water supply apparatus of the present embodiment is based on the data of the remaining hot water temperature detecting means 32 for obtaining the temperature at each position of the tank by a plurality of temperature detectors 7 provided in the hot water storage tank 1 and the data of the remaining hot water temperature detecting means 32. The hot water amount calculating means 40 for determining the amount of hot water available when the amount of available hot water in the tank is converted into a predetermined temperature, and the amount of hot water when converted into the predetermined temperature from the amount of heat consumed on the load side are determined. Use amount calculation means 47, supply amount calculation means 44 for determining the amount of hot water supplied when the amount of heat supplied by the heating means 14 is converted to a predetermined temperature, and calculation of use amount for the available hot water amount determined by the hot water amount calculation means 40 A usable hot water amount calculating means 45 for subtracting the amount of hot water obtained by the means 47 and adding the amount of hot water obtained by the supply amount calculating means 44 to obtain a current usable hot water amount; Set by the hot water use available hot water amount setting means 34 for setting the available hot water amount as a reference for determining start and stop, and the current available hot water amount obtained by the available hot water amount calculation means 45 and the hot water available hot water quantity setting means 34. The heat source machine temperature for obtaining the temperature detected by the various temperature sensors provided in the heating means 14 and the hot water boiling operation discriminating means 35 for comparing the measured reference value and determining the start and stop of the hot water boiling operation. And detecting means 36. Detailed description of the hot water amount calculating means 40, the used amount calculating means 47, the supply amount calculating means 44, and the usable hot water amount calculating means 45 will be described later.

The hot water temperature / capacity level changing means 38 sets the boiling hot water temperature based on the signals from the hot water boiling operation discriminating means 35 and the heat source device temperature detecting means 36 and sets the capacities of the boiling pump 5 and the compressor 10. I do. The boiling operation control unit 39 controls the capacities of the boiling pump 5 and the compressor 10 based on the set contents in the hot water temperature / capacity level changing unit 38. The operation unit 37 has setting means for various operation modes, and the user can arbitrarily set a desired operation condition. For example, when the setting is input by the bath automatic setting means, the hot water temperature / capacity level A setting signal is output to the changing means 33 and an operation start signal is output to the bath filling means 19 and the bath reheating means 29. For the bath hot water filling means 19, hot water stored from the upper part of the hot water storage tank 1 and cold water from the water supply pipe 3 are mixed so that the hot water temperature is set in advance. To supply. Thereafter, a heat retaining operation or the like is performed on the bath chasing means 29 so as to maintain a preset bath temperature.

  The hot water useable hot water volume setting means 34 arbitrarily sets the startable hot water volume or the stop hot water volume or the startable hot water volume and the stop hot water volume according to time, and runs out during the daytime period and the peak shift time period. The start condition and stop condition of the boiling operation are set in a pattern. Here, the amount of hot water that can be used for starting is a set value of the amount of hot water that can be used to start boiling water boiling operation. Start cutting and boiling operation. Specifically, a boiling start signal is output when the current usable hot water amount signal output from the usable hot water amount calculation means 45 falls below the activation usable hot water amount signal set by the hot water usable water amount setting means 34. .

  Moreover, the amount of hot water that can be used for stoppage is a set value of the amount of hot water that can be used for stopping the hot water boiling operation, and can be obtained by adding the amount of hot water calculated by the boiling water amount calculation means 44 during the boiling operation. When the amount of hot water exceeds the amount of hot water that can be stopped, the hot water boiling operation is stopped. Specifically, when the usable hot water amount signal output from the usable hot water amount calculating unit 45 exceeds the stop usable hot water amount signal set by the hot water available usable water amount setting unit 34, a boiling stop signal is output.

  And the hot water use available hot water amount setting means 34 changes the amount of hot water that can be used for starting and the amount of hot water that can be stopped based on a predetermined period of time that is set in advance, for example, 2 to 7 days. The learning control means 48 is updated so as to be close to the set value. For example, if the frequency of starting hot water is decreased within a predetermined period, the amount of hot water that can be used for starting is changed, and the use of the hot water is stopped accordingly. Change the amount of hot water to increase. In addition, when the amount of hot water that can be used for starting is not decreased within a predetermined period, the amount of hot water that can be used for starting is changed to be lowered, and accordingly, the amount of hot water that can be used for stopping is also changed to be lowered. By repeating this process, the amount of hot water that can be used for startup and the amount of hot water that can be used for stoppage can be brought close to the set values in accordance with the actual usage, and the optimal amount of hot water that can be used according to the daily hot water usage is ensured. This can be realized, and an efficient boiling operation can be secured without performing a wasteful hot water boiling operation.

  In addition to the above, the learning control means 48 can detect a change in the life pattern of each home based on a change in the amount of hot water that can be used per hour within a predetermined period, and can be activated and used in accordance with the life pattern. Change the time to change the amount of hot water and the amount of hot water that can be stopped, and perform learning control so that it becomes a setting pattern of the amount of hot water that can be activated and the amount of hot water that can be stopped according to the actual usage, and according to the usage pattern of the daily hot water amount It is possible to secure an optimal amount of hot water that can be used, and to ensure an efficient boiling operation without performing a wasteful hot water boiling operation.

As shown in FIG. 2, the amount of hot water that can be used and the amount of hot water that can be stopped are set to arbitrary values according to time, and are appropriate for efficient boiling operation according to the usage of hot water according to the life pattern. The amount of hot water is ensured. To explain in more detail with reference to FIG. 2, for example, from 7 am to 10 am in the morning, the amount of hot water used is relatively high, but a large amount of hot water is heated in the hot water storage tank 1 due to the entire night boiling operation. Since the amount of hot water is secured and it is possible to use this hot water, the amount of hot water that can be used for activation during this time period is set low, and the hot water boiling operation is set to be difficult. Even if the amount of hot water used increases and it enters into the boiling out operation, it is not necessary to use a large amount of boiling water in consideration of the fact that hot water is not used much in the subsequent time zone. Therefore, the amount of hot water that can be stopped during this time period is set to a small value so that the amount of boiling water is reduced.

  Next, from 10:00 to 17:00, it is the time when the amount of hot water used is the least during the day, and this time is set lower than the amount of hot water available for starting from 7:00 to 10:00. Then, set it to a state where it is more difficult to enter the hot water boiling operation. And by setting the amount of hot water that can be stopped to a smaller value, it is possible to limit the heating operation during the daytime hours when the power rate is high. In order to prepare for the bathing time zone, set the maximum amount of hot water that can be used in the hot water during the day from 17:00 to around 20:00 including the bathing time zone. The boiling operation is started in advance to ensure the necessary amount of hot water, and the hot water boiling operation is started even if the amount of hot water in the hot water storage tank 1 is slightly reduced by starting the hot water filling operation. In addition, by performing a boiling operation during the hot water filling operation, the amount of hot water during the subsequent use of the shower is ensured. The amount of hot water that can be stopped during this time period is set to the highest value so that substantially the entire hot water storage tank 1 is boiled. Then, after 20:00 when the bathing time period ends, the amount of hot water that can be used for startup and the amount of hot water that can be used for stoppage are set low, and the amount of hot water to be heated is kept low, so that the heating rate in the midnight hours when electricity charges are low is increased. ing. And after 23:00, it becomes a midnight time zone, and the peak shift time zone passes and the whole amount boiling operation is started. Naturally, in this peak shift time zone, the amount of hot water that can be used for starting and the amount of hot water that can be used for stoppage are set to be small, and the amount of hot water to be heated is refrained.

  However, when the life pattern is changed and the amount of use in each time zone is increased, the frequency of the available hot water is less than the amount of hot water available for startup, and the hot water boiling operation is frequently performed. Therefore, if hot water boiling operation is frequently performed within a predetermined period, it is judged that the life pattern has changed, and the set values of the start usable hot water amount and the stop usable hot water amount are changed to a higher value. When the hot water boiling operation is not performed within the predetermined period, the set values of the start usable hot water amount and the stop usable hot water amount are changed to be lower. This correction process is repeated to set the amount of hot water that can be activated and the amount of hot water that can be stopped according to the actual condition of use.

  In addition, as a method of ensuring the optimal pattern for setting the amount of hot water that can be used for start and stop and the amount of hot water that can be stopped according to different lifestyle patterns in each household, the change in the amount of hot water that can be used over time is sought. By determining which time zone the bathing hours will be used and changing the setting pattern of the amount of hot water that can be used and the amount of hot water that can be stopped according to that time zone, The amount of hot water can be secured.

  As described above, the amount of hot water that can be activated and the amount of hot water that can be stopped are set arbitrarily according to time, and the start / stop conditions are corrected by learning control based on the actual usage within a predetermined period, so that it corresponds to the lifestyle pattern. An appropriate amount of hot water can be ensured by an efficient boiling operation corresponding to the use of hot water.

  The hot water boiling operation discriminating means 35 is calculated by the starting available hot water amount and the stopped usable hot water amount and the usable hot water amount calculating means 45 which are finely set for each time zone as described above by the hot water available hot water amount setting means 34. Is compared with the amount of hot water that can be used, and it is determined whether it is necessary to start the hot water boiling operation or whether the hot water boiling operation should be stopped, and the hot water temperature / capacity level changing means 38 and the boiling operation control means are determined. A signal is output to 39. The heat source device temperature detection means 36 outputs the temperature signals detected by the incoming water temperature detector 13a, the hot water temperature detector 13b, and the outside air temperature detector 13c to the hot water temperature / capability level changing means 38 and the boiling operation control means 39. .

  With the above configuration, for example, the fact that the usable hot water amount value calculated by the usable hot water amount calculating unit 45 is lower than the set value of the startable hot water amount set by the hot water usable water amount setting unit 34 is short of water. When it is determined by the boiling operation discriminating means 35, the hot water temperature / capability level changing means 38 is set to the same boiling temperature (for example, 85 ° C.) as that used for the total amount boiling operation, and the hot water boiling operation is performed. In this hot water boiling operation, an operation signal is output from the boiling operation control means 39 to the boiling pump 5 and the compressor 10 based on the set temperature. Also, the hot water temperature detection means 36 detects the hot water temperature at the hot water temperature detector 13b, and the hot water temperature / capacity level changing means 38 adjusts the hot water temperature to a target boiling temperature (for example, 85 ° C.). The capacities of the boiling pump 5 and the compressor 10 are changed. The amount of hot water converted into a predetermined temperature from the amount of heat calculated by the boiling water amount calculation means 44 is added by the boiling operation, and the current available hot water amount calculated by the usable hot water amount calculation means 45 is increased. When the set value of the amount of hot water that can be stopped set by the possible hot water amount setting means 34 is reached, the operation of the boiling pump 5 and the compressor 10 is stopped by the boiling operation control means 39. In addition, when setting the amount of hot water that can be stopped to the maximum, the temperature of the remaining hot water temperature detector 7a at the bottom may reach the set temperature, and the heat source machine is a stop condition when the whole amount is heated up. The temperature detection means 36 detects the incoming water temperature at the incoming water temperature detector 13a, and when this incoming water temperature reaches the target boiling temperature (for example, 85 ° C.), the boiling operation control means 39 causes the boiling pump 5 and the compressor 10 to move. The operation may be stopped. The outside air temperature at the outside air temperature detector 13c is detected by the heat source device temperature detecting means 36, and the target boiling temperature is changed according to the outside air temperature, or the capacity setting of the compressor 10 is changed. It is configured.

  Next, the control flow of the hot water storage type hot water supply apparatus of the present embodiment will be described with reference to FIG.

  First, the boiling water temperature / capacity is determined by the hot water temperature / capacity level changing means 38 (step 1). Then, from the current time, it is determined whether or not it is a daytime time zone (second predetermined time zone) (step 2). If the present time is the second predetermined time zone, the available hot water amount value obtained by the usable hot water amount calculating means 45 is set by the hot water available hot water quantity setting means 34 by time reflecting the information of the learning control means 48. It is determined whether or not the starting available hot water volume is below the set value (step 3).

  In step 3, when the available hot water amount value calculated by the available hot water amount calculating means 45 is not less than the start available hot water amount, the change in the available hot water amount is continuously monitored (step 4). In step 3, when the available hot water volume value is lower than the startable hot water volume, the hot water temperature / capacity level changing means 38 changes the capacity of the compressor 10 to the capacity during the boiling operation (for example, 4.5 kW). The capacity is changed to a higher capacity (for example, 9 kW) (step 5), and a hot water boiling operation is performed (step 6).

  Then, the current available hot water amount obtained by adding the supply amount converted to the predetermined temperature from the heat amount supplied by the boiling operation reflects the information of the learning control means 48, and the hot water usable hot water amount setting means 34. It is determined whether or not the set value of the amount of hot water that can be stopped that is set for each hour is exceeded (step 7).

  In step 7, when the amount of hot water that can be used does not exceed the amount of hot water that can be stopped, the hot water boiling operation is continued (step 6). If it is determined in step 7 that the amount of hot water available exceeds the amount of hot water available for stoppage, the hot water boiling operation is stopped (step 8).

If it is determined in step 2 that it is not the second predetermined time zone, it is determined whether or not it is a peak shift time zone (step 9).

  When it is determined in step 9 that it is a peak shift time zone, the available hot water amount value obtained by the available hot water amount calculating means 45 reflects the information of the learning control means 48 as in the case of the daytime time zone. Then, it is determined whether or not it is less than the set value of the amount of hot water that can be used for starting that is set hourly by the hot water available amount setting means 34 (step 10).

  In step 10, when the available hot water amount value calculated by the available hot water amount calculating means 45 is not lower than the start available hot water amount, the change in the available hot water amount is continuously monitored (step 11). In step 10, when the available hot water volume value is lower than the startable hot water volume, the hot water temperature / capacity level changing means 38 causes the capacity of the compressor 10 to be increased from the capacity (for example, 4.5 kW) during the entire boiling operation. Is changed to a higher capacity (for example, 9 kW) (step 12), and a hot water boiling operation is performed (step 13).

  Then, the current available hot water amount obtained by adding the supply amount converted to the predetermined temperature from the heat amount supplied by the boiling operation reflects the information of the learning control means 48, and the hot water available hot water amount setting means 34. It is determined whether or not the set value of the amount of hot water that can be stopped that is set for each hour is exceeded (step 14).

  In step 14, when the amount of hot water that can be used does not exceed the amount of hot water that can be stopped, the hot water boiling operation is continued (step 13). If it is determined in step 14 that the available hot water volume exceeds the stop usable hot water volume, the hot water boiling operation is stopped (step 15).

  If it is determined in step 9 that it is not the peak shift time zone, it is determined whether or not the temperature detected by the incoming water temperature detection means 13a has reached the predetermined temperature at the end of the second predetermined time zone (step 16). ).

  If it is determined in step 16 that the temperature detected by the incoming water temperature detecting means 13a has not reached the predetermined temperature, the whole amount boiling operation is performed as planned (step 17). If it is determined in step 16 that the temperature detected by the incoming water temperature detection means 13a is equal to or higher than the predetermined temperature, the whole amount boiling operation is not performed (step 18).

  The boiling operation is performed in the steps as described above, and an effective remaining hot water amount necessary for the hot water storage tank 1 is ensured.

  Next, a remaining hot water amount confirmation device according to the present embodiment, which includes the hot water amount calculating means 40, the used amount calculating means 47, the supply amount calculating means 44, and the usable hot water amount calculating means 45, will be described.

In the hot water storage type hot water supply apparatus according to the present embodiment, based on the information of the remaining hot water temperature detection means 32 for obtaining the temperature at each position in the tank height direction from the detection data of the plurality of temperature detectors 7 provided in the hot water storage tank 1. The amount of heat held by the amount of remaining effective hot water currently in the hot water storage tank 1 is calculated. The remaining hot water temperature detection means 32 compares a predetermined determination temperature with the detection temperature of the temperature detector 7. When the temperature is lower than the determination temperature, it is determined that there is no remaining hot water amount. Then, the information is transmitted to the hot water amount calculation means 40 as heat amount calculation information. However, the predetermined amount of hot water in the upper part of the hot water storage tank 1 is excluded from the effective remaining hot water amount to obtain the remaining hot water amount. For example, when it is set so as to exclude 10 L at the upper part of the tank, when the temperature detector 7d provided at the uppermost part of the tank detects a temperature equal to or higher than the determination temperature, only 10 L is used for the calorie calculation as the effective remaining hot water amount. When 20 L is excluded, even if the temperature detector 7d detects a temperature equal to or higher than the determination temperature, the remaining amount of hot water is processed. This is a measure to avoid the situation where there is no actual hot water volume for the calculation result with hot water volume, by covering the error with the hot water volume at the top of the tank even if an error occurs during the heat volume calculation. is there.

  Then, the calculated amount of heat is converted into a usable hot water amount that indicates how much hot water can be used in the case of continuous hot water at a hot water temperature that is typically used for hot water filling or bathing, for example 40 ° C. A hot water amount calculating means 40 for calculating is provided. Further, as shown in FIG. 6, the usable hot water amount obtained by the hot water amount calculating means 40 is a zero point on the display where the predetermined hot water amount (20 L) in the upper part of the hot water tank 1 is left, and the lowest point of the hot water tank 1 The display process is performed while shifting between (150L) and when the total tank volume (150L) is equal to or higher than the judgment temperature, the amount of hot water that can be used is displayed using the actual tank capacity, By displaying the amount of available hot water while shifting from a fixed amount to the total amount of the tank in a predetermined relationship, it is possible to display the amount of available hot water based on the amount of hot water close to the actual amount of hot water while avoiding abnormal display due to errors. Is.

  When the hot water amount calculation means 40 determines that the temperatures detected by the plurality of temperature detectors 7 provided in the hot water storage tank 1 are not suitable as standard operating temperatures, or when it has determined that the temperature has returned to an appropriate temperature. Then, calculate the amount of heat stored in the hot water storage tank 1 again at that time, and convert it to the amount of usable hot water that indicates how much hot water can be used when the hot water is used at the standard hot water temperature. Like to do. By performing this process, it is possible to verify the change in the amount of available hot water when used halfway or when the boiling operation is performed, and the amount of available hot water can be accurately obtained. Further, when an error occurs between the usable hot water amount obtained by recalculation and the display data, the display data is corrected step by step based on a predetermined correction condition. Thus, the display data can be changed smoothly without a sense of incongruity that the display is suddenly changed by correcting the errors step by step at a predetermined timing instead of correcting the errors at once.

  Further, the hot water supplied from the hot water supply pipe 2a and the water supplied from the water supply pipe 3 are mixed at a predetermined temperature by the mixing valve 20 and the amount of heat used by the hot water supply means 25 for discharging hot water from the currant 24 is determined as the hot water temperature detector 21. And the amount of hot water used at the same temperature as when the amount of usable hot water was calculated by the hot water amount calculating means 40, for example, at 40 ° C. It has hot water supply amount calculation means 41 which calculates in terms of the amount of hot water used indicating whether or not.

  The hot water supplied from the hot water pipe 2b and the water supplied from the water supply pipe 3 are mixed at a predetermined temperature by the mixing valve 15 and supplied to the bath water circulation circuit 31 from the hot water bathing circuit 19a. The amount of heat used is calculated based on the data detected by the hot water temperature detector 16 and the hot water flow rate detector 18, and the hot water temperature under the same conditions as when the available hot water amount is calculated by the hot water amount calculating means 40 from the heat amount. For example, it has a hot water filling amount calculating means 42 that calculates the amount of hot water used to indicate how much hot water has been used at 40 ° C.

Also, the hot water supplied from the hot water outlet pipe 2c is returned to the lower part of the tank by a predetermined circulation amount via the bath reheating circuit 29a, and the bath water circulating in the bathtub water circulation circuit 31 in the bath heat exchanger 26 in the circulation process The amount of heat consumed by heat exchange is calculated based on the inlet and outlet temperatures of the bath heat exchanger 26 and the circulation flow rate. At this time, the outlet temperature is detected by the temperature detector 28, and the inlet temperature is substituted by the temperature detected by the temperature detector 7 d attached to the uppermost part of the hot water storage tank 1. Furthermore, the circulation flow rate can be substituted by using the control data of the circulation pump 27, such as the rotation pulse, duty ratio, current value, etc., and is used in the bath reheating operation from the above inlet temperature, outlet temperature and circulation flow rate. Heat quantity can be obtained. Then, the amount of hot water that is used when the amount of hot water that can be used is calculated by the hot water amount calculation means 40 from the amount of heat is converted into a hot water amount that indicates how much hot water has been used, for example, at 40 ° C. A boiling water amount calculation means 43 is provided.

  By using the hot water supply amount calculating means 41, the hot water filling amount calculating means 42, and the reheating hot water amount calculating means 43, a use amount calculating means 47 for calculating the amount of hot water converted into a predetermined temperature from the amount of heat flowing out from the load path is constituted. The amount of hot water used in the load path can be obtained with high accuracy, and the amount of hot water available can be obtained in real time by performing subtraction correction of the amount of hot water obtained by the hot water amount calculation means 40 using this amount of hot water used. Since the user can confirm the change in the amount of hot water that can be used in conjunction with the state of use, the user-friendliness can be improved.

  Further, when the boiling operation is started by the boiling operation control means 39, the hot water storage tank is heated from the heating means 14 by the boiling operation based on the information of the hot water temperature / capacity level changing means 38 and the heat source unit temperature detecting means 36. 1 shows how much heat is supplied, and shows how much hot water is supplied at the same temperature as when the amount of hot water that can be used is calculated by the hot water calculating means 40, for example, 40 ° C. A boiling amount calculation means 44 for calculating in terms of the additional usable hot water amount, and a supply amount calculation for calculating the additional usable amount converted into a predetermined temperature from the amount of heat flowing in from the heating means by the boiling water amount calculation means 44 By configuring the means, the amount of additional usable hot water supplied from the heating means 14 can be obtained with high accuracy, and the amount of hot water available for calculation is obtained by the hot water amount calculating means 40 using this amount of additional usable hot water. By performing the addition correction of the available hot water amount, the current usable hot water amount can be obtained in real time, and the user can check the change in the available hot water amount linked to the heating operation state by the heating means 14. Therefore, usability can be improved.

  Specifically, the heating capacity set by the hot water temperature / capacity level changing means 38 (for example, 4.5 KW at normal time, 2 KW at the end of boiling, 9 KW at full power) and the heat source device temperature detecting means 36 Based on the detected temperatures from the incoming water temperature detector 13a and the hot water temperature detector 13b, the amount of boiling per predetermined time is obtained, and the amount of additional usable hot water converted into the predetermined temperature is calculated. In other words, the amount of boiling is calculated according to the heating capacity that changes depending on the change in the outside air temperature or the incoming water temperature, or whether the whole quantity is heated up or added, and the heating capacity is increased especially at the end of boiling when the incoming water temperature rises. Since the boiling operation is performed with a smaller value, the calculation is performed using the reduced heating capacity when obtaining the amount of boiling.

  Then, the amount of hot water used by the used amount calculating means constituted by the hot water supply amount calculating means 41, the hot water amount calculating means 42 and the reheating hot water amount calculating means 43 is subtracted from the usable hot water amount obtained by the hot water amount calculating means 40. There is a usable hot water amount calculating means 45 for processing and adding the additional usable hot water amount supplied from the supply amount calculating means constituted by the boiling water amount calculating means 44 to obtain the current usable hot water amount. The available hot water amount obtained by the usable hot water amount calculating means 45 is always updated at a predetermined timing via the display means 46 provided in the operation unit 37 and the like, and the latest data is always displayed. It is used as data for judging the start and stop of the boiling operation.

  Next, the display configuration will be described. As an example of the display means 46, as shown in FIG. 5, in the remote control 48 having the operation unit 37 and the display unit 47, a scale of 0L-400L is provided on a part of the display unit 47. In the meantime, a level indicator that changes linearly based on the available hot water amount data obtained by the available hot water amount calculation means 45 is provided. In addition to the level indicator, the data on the amount of usable hot water may be directly displayed as numerical data, and it is limited to the present embodiment as long as it can be easily understood by the user using it. It is not something.

The point is to provide a display form of the amount of remaining hot water in a user sense that even a small hot water storage type hot water supply device having a tank capacity of only about 100 L can supply enough hot water to a 200 L or more bathtub. Basically, the change in the amount of remaining hot water in the process of use is displayed in real time by a correction operation by calculation processing of the amount used and the amount supplied.

  Next, the calculation flow of the remaining hot water amount confirmation device in the hot water storage type hot water supply apparatus of the present embodiment will be described with reference to FIG.

  First, in step 101, it is determined whether or not the temperatures detected by the plurality of temperature detectors 7a, 7b, 7c, and 7d provided in the hot water storage tank 1 are equal to or higher than a predetermined determination temperature. If it is determined that there is the above, it is determined that there is an effective remaining hot water amount in the hot water storage tank 1, and it is detected in step 102 how much the effective residual hot water amount is in the hot water storage tank 1. For example, when it is determined that the temperature detector 7b is equal to or higher than the determination temperature, it is detected that the hot water storage tank 1 has an effective remaining hot water amount of 100 L.

  And the calorie | heat amount which the effective remaining hot water amount detected at step 103 holds is calculated. In this case, the amount of heat is calculated from the temperature and the amount of hot water detected at each mounting position of the temperature detector 7 and then added to obtain the effective amount of heat. When the effective amount of heat is obtained, in step 104, the amount of hot water that can be used is shown based on the effective amount of heat, and the amount of hot water that can be used when continuously discharged at 40 ° C. And the data is sent to the display means 46 to notify the user in an easy-to-understand manner through numerical display or graph display.

  As described above, after finding out how much hot water can be used under the standard operating conditions, the amount of remaining hot water stored in the hot water storage tank 1 is calculated and subtracted under the same conditions. By performing the process, the change in the amount of usable hot water linked to the consumption state of the hot water is obtained in real time. First, it is determined in step 105 whether or not there is hot water from the currant 24. If there is, the amount of heat consumed by the currant hot water from the flow rate detected by the flow rate detector 22 and the hot water temperature detector 21 and the hot water temperature in step 106. Is calculated and converted into a value indicating how much hot water is used at the same temperature as when the amount of usable hot water is obtained from the amount of heat consumed in step 107, and the amount of hot water used is obtained. Then, after subtraction processing is performed in step 108 to correct the amount of usable hot water, the amount of usable hot water is updated in step 109, and the data is sent to the display means 46 to update the display data.

  If it is determined in step 105 that there is no currant hot water, it is determined in step 110 whether or not there is hot water to the hot water filling circuit 19a. If there is, the flow rate detector 18 and the hot water temperature detector 16 are determined in step 111. The amount of heat consumed by the hot water supply is calculated from the flow rate detected in step 1 and the temperature of the hot water, and the amount of hot water used at the same temperature as when the amount of usable hot water was calculated from the amount of heat consumed in step 112 was used. The amount of hot water used is calculated by converting to a value indicating. Then, after subtraction processing is performed in step 108 to correct the amount of usable hot water, the amount of usable hot water is updated in step 109, and the data is sent to the display means 46 to update the display data.

  If it is determined in step 110 that there is no hot water supply, it is determined in step 113 whether there is a reheating hot water, and if so, in step 114 the amount of heat consumed by the bath heat exchanger 26 is calculated. The amount of hot water used is obtained by converting into a value indicating how much hot water has been used at the same temperature as when the amount of available hot water was obtained from the amount of heat consumed in step 115. Then, after subtraction processing is performed in step 108 to correct the amount of usable hot water, the amount of usable hot water is updated in step 109, and the data is sent to the display means 46 to update the display data.

In addition, after the available hot water amount data is updated in step 109, it is determined whether or not the boiling operation is performed in step 116, and if so, based on the boiling condition set in step 117. Calculate the amount of boiling and convert it to a value indicating how much hot water was supplied at the same temperature as when the amount of usable hot water was calculated from the amount of boiling in step 118. Ask for. In step 119, an addition process is performed to correct the available hot water amount. In step 120, the available hot water amount is updated, and the data is sent to the display means 46 to update the display data.

  Then, the change in the effective remaining hot water amount is monitored in step 121, and when it is determined that there is a change, the flow returns to step 101, the usable hot water amount is calculated again from the effective remaining hot water amount detection step, and the error from the display data is verified. . When an error occurs, display data is adjusted at a predetermined timing. Specifically, when the amount of usable hot water is recalculated by the hot water amount calculating means 40 and there is a negative error from the display data, the hot water amount calculating means 41, the hot water amount calculating means 42, and the reheating hot water amount calculating means 43 When subtraction correction is performed by the configured usage calculation means, correction is made in addition to the subtraction correction amount up to a predetermined amount of negative error, and the negative error with the display data is gradually adjusted. The display accuracy of the amount of hot water that can be used is improved. In addition, when there is a plus error with the display data, when the addition correction is performed by the supply amount calculation means constituted by the boiling water amount calculation means 44, the addition amount is added to the addition correction amount up to a predetermined amount of the plus error. The display accuracy of the available hot water volume is improved by gradually adjusting the plus error with the display data.

  If it is determined in step 121 that there is no change in the amount of remaining hot water and if it is determined in step 116 that there is no boiling operation, the process returns to step 105 to monitor the use state on the load side.

  If it is determined in step 101 that there is no effective remaining hot water amount, or if it is determined in step 113 that there is no reheating hot water, the process proceeds to step 116 to monitor the state of the boiling operation.

  As described above, the amount of heat held by the hot water stored in the hot water storage tank is obtained, and the amount of hot water that can be used in the case of continuous hot water discharge at the normal hot water temperature (for example, 40 ° C) is calculated from the amount of heat. Because it is converted into the amount of hot water that can be displayed and displayed, it is easy to determine how much hot water can be used under standard operating conditions, regardless of the size of the hot water tank. Can be used appropriately according to the amount of hot water available. Further, the amount of heat consumed by the hot water supply curan 24, the bath hot water filling circuit 19a, and the bath reheating circuit 29a connected to the load path are respectively obtained, and the hot water temperature (for example, the same condition as when the usable hot water amount is obtained from the heat amount (for example, (40 ° C) is converted to the amount of hot water used to indicate how much hot water has been used, and is displayed by subtracting the amount of hot water used from the amount of hot water that can be used. Thus, the change in the amount of hot water that can be used can be confirmed in real time, and the user can easily confirm how much can be used while observing the change, thereby improving usability. Further, when the amount of stored hot water decreases and the heating means operates to start additional boiling operation, the amount of heat supplied from the heating means 14 is obtained, and the hot water temperature under the same conditions as when the amount of usable hot water is obtained from the amount of heat. Since it is converted into an additional available hot water amount that indicates how much hot water was supplied (for example, 40 ° C.) and the additional available hot water amount is added to the available hot water amount and displayed, boiling of the heating means 14 The change in the amount of hot water that can be used can be checked in real time according to the lifting operation state, and the user can easily check how much can be used while observing the change, thereby improving usability. be able to.

That is, based on the amount of heat stored in the hot water storage tank 1, the amount of heat used on the load side, and the amount of heat supplied from the heating means, each is converted into the amount of hot water at the standard operating temperature under the same conditions, and the subtraction / addition processing is performed. Since the latest available hot water volume is obtained and displayed in real time, the current available hot water volume can be known as the actual temperature condition or a value close to it regardless of the size of the hot water storage tank. Since the user can intuitively grasp the usage status of the hot water remaining in the hot water storage tank simply by looking at the value, usability can be improved dramatically.

  Therefore, even if the capacity of the hot water storage tank is, for example, about 150 L which is smaller than the capacity of a general bathtub (200 L), the available hot water volume can be calculated as 300 L and the value can be displayed. Can see that the value of the hot water can be filled in the bathtub, and after the hot water filling in the bathtub is finished, it can be confirmed in real time that the amount of available hot water has decreased to 100L. When the raising operation is started, it is possible to confirm in real time that the amount of hot water that can be used gradually increases from 100 L, and in particular, as a remaining hot water amount confirmation device for a hot water storage hot water supply device having a small hot water storage tank capacity. It is the best one.

  The hot water storage type hot water supply apparatus of the present invention is particularly useful for a hot water storage type hot water supply apparatus using a heat pump cycle using carbon dioxide as a refrigerant, and can also be applied to a hot water storage type hot water supply apparatus using a heater or gas as a heat source.

The block diagram which shows the whole structure of the hot water storage type hot water supply apparatus by Embodiment 1 of this invention. The figure which shows the operation of the hot water boiling operation of the hot water storage type water heater Control flow diagram of the hot water storage type hot water supply device Remaining hot water amount calculation flow diagram of the hot water storage system Remote control configuration diagram having display means of the hot water storage type hot water supply apparatus The figure which shows the relationship between the amount of tank hot water and the display hot water of the hot water storage type hot water supply device

Explanation of symbols

1 Hot water storage tank 14 Heating means 19 Bath hot water filling means (load circuit)
25 Hot water supply means (load circuit)
29 Bathing means (load circuit)
34 Hot water available amount setting means 40 Hot water amount calculating means 41 Hot water amount calculating means (used amount calculating means)
42 Hot water amount calculation means (use amount calculation means)
43 Additional hot water calculation means (use amount calculation means)
44 Boiling hot water amount calculating means (supply amount calculating means)
45 Usable hot water amount calculation means 48 Learning control means

Claims (15)

A hot water storage tank, a load path for supplying hot water from the hot water storage tank to the load side, a heating means for heating the hot water in the hot water storage tank, and a heat amount stored in the hot water in the hot water storage tank are used to calculate a usable hot water amount at a predetermined temperature. Hot water amount calculating means, usage amount calculating means for calculating the amount of hot water converted to a predetermined temperature from the amount of heat flowing out of the load path, and supply for calculating an additional usable amount converted to a predetermined temperature from the amount of heat flowing from the heating means An amount calculating means; and a usable hot water amount calculating means for calculating a usable hot water amount based on the amount of hot water determined from the calculation results of the hot water amount calculating means, the used amount calculating means, and the supply amount calculating means, and performing a total amount boiling operation. In addition to setting a time zone, the storage unit is set to perform a hot water boiling operation when a predetermined usable hot water amount is calculated by the usable hot water amount calculating means. A hot water useable hot water amount setting means for setting the startable hot water amount for determining the start of the hot water boiling heating operation to an arbitrary value according to time, and the hot water useable hot water amount setting means Has a learning function for changing the amount of hot water available for activation based on the usage record for a predetermined period, and is calculated by the amount of hot water available for activation set by the hot water available amount setting means and the available hot water amount calculation means. A hot water storage type hot water supply apparatus that starts and stops the heating means based on the amount of hot water that can be used. The hot water amount calculation means calculates the amount of heat that can be held for each layer from the temperatures detected by a plurality of temperature detectors provided in the hot water storage tank, calculates the usable hot water amount converted into a predetermined temperature, and is detected by the temperature detector. The hot water storage hot water supply apparatus according to claim 1, wherein when the temperature is equal to or lower than a predetermined determination temperature, it is determined that there is no remaining hot water and is not added to the amount of hot water that can be used. The hot water storage type hot water supply apparatus according to claim 1 or 2, wherein the hot water amount calculating means calculates a usable hot water amount while leaving a predetermined hot water amount above the hot water storage tank. The hot water amount calculation means calculates the amount of hot water that can be used when it is detected that the remaining hot water presence / absence information has been switched based on the temperature detected by the temperature detector and the determination temperature for determining the presence or absence of the remaining hot water. The hot water storage type hot water supply apparatus according to any one of claims 1 to 3. The usage amount calculating means calculates the usage amount converted to a predetermined temperature by obtaining the flow rate detected by the flow rate detector and the tapping temperature detector provided in the load path and the tapping temperature, and calculating the usage amount converted to a predetermined temperature, and by the hot water amount calculating means. The hot water storage type hot water supply apparatus according to any one of claims 1 to 4, wherein subtraction correction is performed for the amount of usable hot water. The usage amount calculating means calculates the amount of heat used in the bath chase circuit provided in the load path, calculates the usage amount converted to a predetermined temperature, and performs subtraction correction of the usable hot water amount determined by the hot water amount calculating means. The hot water storage type hot water supply apparatus according to any one of claims 1 to 4. When the boiling operation is started, the supply amount calculation means calculates a supply amount of hot water converted to a predetermined temperature by obtaining a boiling amount every predetermined time, and performs addition correction of the available hot water amount calculated by the hot water amount calculation means. The hot water storage type hot water supply device according to any one of claims 1 to 4, wherein the hot water storage type hot water supply device is provided. The supply amount calculating means changes the heating capacity in accordance with the temperature of incoming water to the variable capacity heating means, calculates the amount of boiling for each predetermined time, and calculates the amount of hot water supplied converted to the predetermined temperature. Hot water storage system. The supply amount calculating means changes the heating capacity according to the heating operation mode of the heating means with variable capacity, calculates the amount of boiling for every predetermined time, and calculates the amount of hot water supplied converted to a predetermined temperature. The hot water storage type hot water supply apparatus described. The usable hot water amount calculating means performs subtraction correction with the used amount obtained by the used amount calculating means and addition correction with the supplied hot water amount obtained by the supplied amount calculating means with respect to the usable hot water amount obtained by the hot water amount calculating means. The hot water storage type hot water supply apparatus according to any one of claims 1 to 9, wherein the current usable hot water amount is constantly updated. Any one of claims 1 to 10, wherein the hot water useable hot water volume setting means has a learning function of changing so that the amount of hot water available for activation increases as the frequency of use within a predetermined period falls below the amount of hot water available for activation. The hot water storage type hot water supply apparatus according to claim 1. The hot water storage type hot water supply device according to any one of claims 1 to 10, wherein the hot water use available hot water amount setting means has a learning function of changing a time for setting the amount of hot water that can be used for activation based on a usage record for a predetermined period. The hot water storage type hot water supply device according to any one of claims 1 to 12, wherein the hot water use available hot water amount setting means is set such that the startable usable amount is maximized in a time zone when the bath hot water filling operation is performed. The heating means is a heat pump cycle in which a compressor, a radiator, an expansion valve, and an evaporator are connected by piping, and the capacity of the compressor is increased at the time of boiling-out boiling operation than at the time of full-boiling operation. The hot water storage type hot water supply apparatus according to any one of claims 1 to 13. The heating means is a heat pump cycle in which a compressor, a radiator, an expansion valve, and an evaporator are connected by piping, and the refrigerant used in the heat pump cycle is carbon dioxide, and the high pressure side is operated in a state exceeding the critical pressure. The hot water storage type hot water supply apparatus according to any one of claims 1 to 14.