JP2011094895A - Storage water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly usable storage water heater capable of making a user select an optimal operating mode for the user by displaying the operating mode to avoid the shortage of a hot water storage amount, and improving actual use efficiency in a display device immediately after the installation of the storage water heater. <P>SOLUTION: The storage water heater includes: a heating device 2 heating water; a hot water storage tank 1 storing hot water heated by the heating device 2; the display device 4; and a control device 3. The control device 3 includes a plurality of the operating modes in which hot water temperatures and/or hot water amounts heated by the heating device 2 and stored in the hot water storage tank 1 are different, and basic use amount data 16, compares the basic use amount data 16 with use amount data after the installation of the device to determine the operating mode, and displays the determined operating mode in the display device 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a hot water storage type hot water supply apparatus that stores water heated by a heat pump type heating apparatus in a hot water storage tank and uses it for hot water supply, bath hot water filling and heat insulation.

  The hot water storage type hot water supply apparatus heats the water supplied from the bottom of the hot water storage tank to a high temperature by a heating device, and repeats a series of cycles for storing it in the upper part of the hot water storage tank covered with a heat insulating material, thereby Store some hot water. When the user uses hot water to supply hot water, the user mixes it with unheated water so as to obtain a predetermined temperature and use the hot water supply terminal.

  The operating efficiency of the heat pump heating device used here depends on the outside air temperature, the boiling temperature, and the incoming water temperature, which is the temperature of the water supplied to the heating device, and when the outside air temperature is high or the boiling temperature is low, Operation efficiency is improved when the incoming water temperature is low. The outside air temperature varies depending on the season and operating time, and in addition, the incoming water temperature also varies depending on the temperature state of the hot water storage tank.

  In addition, the method of storing hot water in the hot water tank is determined by learning the amount of hot water used by the user at night, and when the amount of hot water in the hot water tank falls below a predetermined amount during the day, the water is heated up. Avoid shortage of hot water storage (see, for example, Patent Document 1).

  In addition, this type of conventional hot water storage type hot water supply device has a plurality of boiling modes in which the combination of the amount of boiling at night according to learning and the combination of the minimum amount of remaining hot water during the day is different. There are modes for driving, an entrusted mode that allows the user to use the water heater without worrying about insufficient hot water storage, and an energy saving mode that reduces energy consumption by reducing the minimum amount of hot water remaining in the daytime in the entrusted mode (for example, Patent Document 2).

JP 2007-285653 A JP 2006-183939 A

  However, when a plurality of operation modes are provided, it is difficult for the user to select an operation mode with high usability that does not have to worry about the lack of hot water storage and the like according to his / her own use situation. .

  In the energy saving mode, the power consumption is reduced because boiling is performed at a low temperature with good operating efficiency, and even if there is a slight boiling in the daytime when the electricity rate is high, the actual usage efficiency (used to generate hot water) The ratio of the actual amount of hot water used and the amount of heat used obtained from the temperature to the power consumption) is good, that is, it is an economical mode. However, on the other hand, since the amount of stored hot water and the amount of remaining hot water are reduced, there is a high possibility that the amount of stored hot water will be insufficient if the amount of hot water used varies widely.

  Further, in the operation mode only at midnight, when the amount of hot water used is larger than the amount of hot water stored at night, the amount of hot water stored may be insufficient. In addition, by storing hot water as much as possible at night, the boiling temperature is high, so the operation efficiency is poor and it may not be economical.

  For this reason, the user must grasp the user's own hot water volume and the variation in the hot water volume and select the optimum operation mode for the user himself, taking into account the operating efficiency characteristics of the heat pump hot water supply device. However, it is difficult for the user to select the operation mode.

  The present invention solves the above-described conventional problems, and immediately after the installation of the hot water storage type hot water heater, by displaying on the display device an operation mode that avoids the shortage of hot water storage and improves the actual use efficiency. It is an object of the present invention to provide a hot water storage type hot water supply device that allows a user to select an optimal operation mode.

  In order to solve the conventional problem, a hot water storage type hot water supply apparatus of the present invention includes a heating device that heats water, a hot water storage tank that stores hot water heated by the heating device, a display device, and a control device. The control device has a plurality of operation modes and basic usage data with different hot water temperatures and / or hot water amounts to be heated by the heating device and stored in the hot water storage tank. Compared with usage data, the operation mode is determined, and the display device is configured to display the determined operation mode, immediately after the installation of the hot water storage hot water supply device, Depending on the amount of hot water used by the user, the user can propose the optimal operation mode for the user by displaying on the display device an operation mode that avoids the shortage of hot water storage and improves the actual use efficiency. Rukoto can.

  According to the present invention, immediately after the installation of the hot water storage type water heater, the user can select the optimum operation mode for the user by displaying on the display device the operation mode in which the shortage of hot water storage is avoided and the actual use efficiency is improved. It is possible to provide a hot water storage type hot water supply apparatus that can be selected.

The block diagram of the hot water storage type hot water supply apparatus in Embodiment 1 of this invention The figure which shows the example of the information preserve | saved in the operation mode information The figure explaining the method of predicting the amount of used hot water from the general amount of hot water used every month stored in the basic usage data (A) The figure which shows the relationship of the average amount of used hot water for every operation mode in Embodiment 1 of this invention, a dispersion | variation, and the amount of hot water storage shortage (b) The dispersion | variation in the average amount of used hot water for every operation mode, the amount of used hot water, and actual use efficiency Figure showing the relationship (c) Figure showing the relationship between the average amount of hot water used for each operation mode, variation and charge Judgment procedure flowchart of the operation mode determination means Display diagram of optimum operation mode for the same display / input device

  1st invention is equipped with the heating apparatus which heats water, the hot water storage tank which stores the hot water heated with the said heating apparatus, a display apparatus, and a control apparatus, The said control apparatus heats with the said heating apparatus, and the said A plurality of operation modes and basic usage data having different hot water temperatures and / or hot water amounts to be stored in a hot water storage tank, and comparing the basic usage data with the usage data after installation of the device, The determined operation mode is displayed on the display device, and immediately after the installation of the hot water storage type hot water supply device, depending on the amount of hot water used by the user, By displaying on the display device the operation mode in which the shortage is avoided and the actual use efficiency is improved, the optimum operation mode for the user can be proposed to the user.

The second invention is characterized in that the operation mode displayed on the display device is updated every predetermined period, and the optimum operation mode is determined every predetermined period. Even if it changes, the operation mode can be determined in response to the change.

  The third invention is characterized in that the display device displays the determined operation mode and the timing when the operation mode is switched, and the user has a prospect of operation of the hot water storage type hot water heater in the future. Can do.

  4th invention is equipped with the heating apparatus which heats water, the hot water storage tank which stores the hot water heated with the said heating apparatus, a display apparatus, and a control apparatus, The said control apparatus heats with the said heating apparatus, and the said A plurality of operation modes and basic usage data having different hot water temperatures and / or hot water amounts to be stored in a hot water storage tank, and comparing the basic usage data with the usage data after installation of the device, When the determined operation mode is different from the currently selected operation mode, the operation mode of the heating device corresponding to the currently selected operation mode is changed. The user does not need to change the operation mode and can automatically maintain the optimum operation mode at all times.

  The fifth invention is characterized in that the heating device is a heat pump, and hot water can be generated particularly efficiently in actual use.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a configuration of a hot water storage type hot water supply apparatus according to Embodiment 1 of the present invention. In FIG. 1, a heating device 2 is a heat pump unit (not shown) that operates by connecting a compressor, a hot water supply heat exchanger, a decompression means, and an air heat exchanger with a refrigerant circuit.

  The plurality of operation modes are stored in the operation mode information 13 of the boiling control device 3, and the operation mode is selected by the user from the display / input device 4.

  The boiling control device 3 includes a temperature difference between the temperature detected by the hot water temperature detection means 22 discharged from the hot water supply terminal and the water temperature detection means 24 for detecting the water temperature, and a flow rate value detected by the flow rate detection means 23 at the hot water supply terminal. The post-installation use amount that is the product (heat amount) of is stored in the post-installation use amount data 14.

  When data for a predetermined period after use is accumulated, the average amount of hot water used in a general household stored in the basic usage data 16 and the variation in the amount of hot water used in the household are stored in the usage data 14 after installation. The predicted average hot water usage is obtained from the amount of hot water used after installation and the date information, the optimum operation mode preset for the predicted average hot water usage is determined, and the optimum operation mode is displayed / input. 4 is displayed.

  The user can select an operation mode that is most suitable for the use situation of the user simply by changing the operation mode according to the display. Thereafter, the hot water supply amount prediction means 11 predicts the hot water supply amount of the next day, and heats the water in the hot water storage tank 1 at night using the heating device 2 according to the operation mode selected at the time of prediction.

  During the daytime, in the operation mode in which the remaining hot water amount in the hot water storage tank 1 is selected by the remaining hot water amount detection means 12, when the hot water storage tank temperature detection means 21 detects that the temperature is below the set amount, An operation command is output from the control device 3 to the heating device 2, and the heating device 2 starts a boiling operation.

  Hereinafter, the operation and action of the hot water storage type hot water supply apparatus configured as described above will be described.

  First, the boiling control device 3 detects the temperature difference between the temperature detected by the hot water temperature detecting means 22 discharged from the hot water supply terminal and the water temperature detecting means 24 for detecting the water temperature, and the flow rate detecting means 23 at the hot water supply terminal. The post-installation use amount that is a product (heat amount) with the flow rate value is converted to 42 ° C. and accumulated as 14 days in the post-installation use amount data 14 as hot water use for one day. When the time reaches 3:00, the amount of hot water used 14 days ago is deleted, and the amount of hot water used on that day is added to update the data. The basic usage data 16 stores the average monthly hot water usage in a general household and the variation in the hot water usage.

  Next, the operation and action will be described. At 3:00, which is the delimiter of the amount of hot water used for one day, the operation mode determining means 15 uses the basic use amount data 16 and the post-installation use amount data 14 to predict the amount of hot water used. Determine an efficient operating mode and timing.

  Before determining the operation mode, first predict the transition of the amount of hot water used. A method for predicting the transition of the amount of hot water used from the amount of hot water used in a general household as shown in FIG. 3 will be described.

  To predict the amount of hot water used, obtain the amount of hot water used immediately after installation and date information, compare the amount of hot water used with the stored data, calculate the amount of hot water used, and calculate the amount of hot water used and the amount of hot water acquired. Is added to the general amount of hot water used to obtain a predicted amount of hot water used.

  As shown in FIG. 2, the operation mode information 13 includes an energy-saving mode excellent in actual use efficiency, a midnight mode in which the heating device 2 is only heated at midnight, and an automatic mode that has a low possibility of shortage of hot water storage. Stores information about start / stop conditions for different modes. In the energy saving mode, the boiling temperature is lowered and the amount of remaining hot water, which is the condition for starting boiling in the daytime, is also small.

  In the entrusted mode, the heating temperature is set to be relatively high and the heating device 2 starts the heating operation even in the daytime when the amount of remaining hot water is large in preparation for the shortage of hot water storage. In the midnight mode, since the boiling temperature is relatively high and the daytime boiling is not performed, the remaining hot water amount is set to 0 L.

  Next, the operation mode determination process is performed after the hot water amount transition prediction, and the operation mode determination means 15 uses the post-installation use amount data 14 to reduce the possibility of shortage of hot water storage and to actually use the operation mode. Determine an efficient and inexpensive operating mode.

  Here, FIG. 4A shows an image diagram of the relationship between the average amount of hot water used and the variation in the amount of hot water used for each operation mode. In the energy saving mode, since the boiling temperature is suppressed to a low temperature, the variation in the amount of hot water used can be dealt with only to some extent.

  On the other hand, Omakase mode is a mode that reduces the possibility of shortage of hot water storage, so even if the amount of hot water used is large or the average amount of hot water used is large, there is a possibility that shortage of hot water storage will occur. Few.

  In the midnight mode, since the daytime boiling operation is not performed, there is a greater possibility that the amount of stored hot water will be insufficient than in the energy saving mode, and the average amount of hot water that can be handled is also small.

FIG.4 (b) is an image figure of the relationship between the average amount of hot water used for every operation mode, and actual use efficiency. The energy saving mode has the highest actual use efficiency, and the entrusted mode in which boiling is performed at a high temperature indicates that the actual use efficiency is poor.

  Moreover, FIG.4 (c) is an image figure of the relationship between the average amount of hot water used for every operation mode, and a charge. Since the entrust mode boils at a high temperature, it consumes more power and costs more than the energy-saving mode. The relationship holds even if the average amount of hot water used increases.

  On the other hand, in the midnight mode, after the amount of hot water used exceeds the maximum amount of hot water that can be stored at night, the daytime boiling operation is not performed, so the charge is constant.

  In consideration of the relationship for each of these three operation modes, the operation mode determining means 15 is less likely to have a shortage of stored hot water in accordance with the procedure shown in FIG. Deriving optimal driving modes that are excellent and cheap.

  When the amount of hot water used can be acquired only for one day immediately after installation, the variation is obtained as a general 100L, and the variation is corrected as the number of accumulated days increases.

  A specific flow is set in May, for example, and a process when the amount of hot water used is 650 L is considered. In this case, since it is the first day, the variation in the amount of hot water used is 100L. From FIG. 3, the general hot water usage data is 450L, but since the hot water usage is 650L, the transition is predicted by adding 200L to the general average hot water usage every month. Determine according to the procedure for judging the mode.

  To determine the operation mode, first, it is determined whether the amount of stored hot water is insufficient (STEP 1). From the relationship between the amount of hot water used and its variation, an operation mode in which the occurrence of a shortage of hot water storage is small is selected. Therefore, the operation mode is an energy saving mode or an entrusted mode as shown in FIG.

  Next, the actual usage efficiency is judged (STEP 2). From FIG.4 (b), the operation mode with an actual usage efficiency with the average amount of hot water used of 650L turns into an energy saving mode. Finally, the fee is determined from FIG. 4C (STEP 3). Here too, when the average amount of hot water used is 650 L, the energy-saving mode has a lower charge. Finally, the energy-saving mode is less likely to cause a shortage of hot water storage, excellent in actual use efficiency, and economical. It is determined that the operation mode is correct.

  The timing for switching the operation mode is determined from the optimum operation mode determined for each month, and the display / input device 4 displays, for example, “Current recommended operation mode is energy-saving mode as shown in FIG. “A change to Omakase Mode is necessary because the amount of hot water used will increase.” Will be displayed.

  In addition, although the determination of the operation mode was performed in the order of STEP1 to STEP2, it may be performed in the order of priority items. For example, if the charge is given priority, the determination in FIG. 4B is performed first.

  Moreover, since the relationship of each operation mode changes with the design of an operation mode, these relationships differ with the capacity | capacitance of a hot water storage tank, and the heating capability of the heat pump which is the heating apparatus 2. FIG.

  Since the operation mode determined by the operation mode determination means 15 is displayed on the display / input device 4, the user can know the optimal operation mode according to the user's own use situation, and the displayed operation By changing to the mode, it is possible to change the operation of the water heater to the optimum operation mode according to the user's own usage situation.

  If the operation mode is determined, the night heating operation by the heating device 2 is performed according to the operation mode from the hot water supply amount predicted by the hot water supply amount prediction unit 11. In the daytime, when the amount of remaining hot water is lower than the amount of remaining hot water set in the operation mode, boiling by the heating device 2 is started to ensure the amount of hot water supply and avoid the shortage of hot water storage.

  As described above, general hot water usage data can be saved, and from the low hot water usage data, the lack of hot water storage can be avoided, the actual usage efficiency can be improved, and the operation mode can be determined from low fees. Immediately after installation, the user can know the optimum operation mode, and know the timing of switching the operation mode, so that the prospect of the subsequent operation can be known.

  As described above, according to the present invention, according to the amount of hot water used by the user, it is optimal for the user by displaying on the display device the operation mode in which the lack of hot water storage is avoided and the actual use efficiency is improved. Since the user can select an appropriate operation mode, it is useful for a night-time heat storage type hot water supply apparatus, in particular, a hot water storage type hot water supply apparatus that uses a heat pump system as a heating apparatus.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Heating device 3 Control apparatus 4 Display / input device 11 Hot water supply amount prediction means 12 Remaining hot water amount detection means 13 Operation mode information 14 Use amount data after installation 15 Operation mode determination means 16 Basic usage amount data 21 Hot water storage tank temperature detection means 22 Hot water temperature detection means 23 Flow rate detection means 24 Feed water temperature detection means

Claims (5)

A heating device for heating water, a hot water storage tank for storing hot water heated by the heating device, a display device, and a control device, wherein the control device is heated by the heating device and stored in the hot water storage tank. It has a plurality of operation modes and basic usage data having different temperatures and / or hot water volumes, and compares the basic usage data with the usage data after installation of the apparatus to determine the operation mode and to display the display A hot water storage type hot water supply apparatus characterized in that the determined operation mode is displayed on the apparatus. The hot water storage type hot water supply apparatus according to claim 1, wherein the operation mode displayed on the display device is updated every predetermined period. The hot water storage type hot water supply apparatus according to claim 1 or 2, wherein the display device displays the determined operation mode and a time when the operation mode is switched. A heating device for heating water, a hot water storage tank for storing hot water heated by the heating device, a display device, and a control device, wherein the control device is heated by the heating device and stored in the hot water storage tank. It has a plurality of operation modes and basic usage data with different temperatures and / or hot water volumes, and compares the basic usage data with the usage data after installation of the device to determine the operation mode and the determination When the selected operation mode is different from the currently selected operation mode, the hot water storage type hot water supply apparatus is changed to the operation operation of the heating device corresponding to the currently selected operation mode. The hot water storage type hot water supply device according to any one of claims 1 to 3, wherein the heating device is a heat pump.