JP5945687B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to boiling control of a hot water storage type hot water supply apparatus that uses hot water heated by a heating means in a hot water storage tank.

  Conventionally, the boiling control of this type of hot water storage type hot water supply device has been performed when the temperature of a predetermined hot water storage tank temperature detecting means becomes below a certain level in early morning, daytime, evening, night, midnight, etc. It is controlled so that boiling is completed when the temperature reaches a certain temperature (for example, see Patent Document 1).

  FIG. 6 shows the hot water supply apparatus described in Patent Document 1, and FIG. 7 shows an example of the daily heat consumption.

  As shown in FIG. 6, the hot water supply apparatus includes a hot water storage tank 1, a heating means 2 that heats low temperature water in the hot water storage tank 1, a water inlet pipe 3 that connects the lower part of the hot water storage tank 1 and the heating means 2, A hot water supply pipe 4 connecting the upper part of the hot water tank 1 and the heating means 2, a circulation pump 5 installed in the incoming water pipe 3, a water supply pipe 6 for supplying low temperature water to the hot water tank 1, A water supply temperature detecting means 7 installed in the water supply pipe 6 is provided.

  Also, a hot water supply pipe 8 that is installed in the upper part of the hot water tank 1 and supplies hot water in the hot water tank 1, and a hot water mixing valve that mixes low temperature water in the water supply pipe 6 and hot water in the hot water supply pipe 8. 9, hot water supply temperature detection means 10 installed in the hot water supply pipe 8, hot water flow rate detection means 11 installed in the hot water supply pipe 8, and installed in the hot water tank 1, and detects the temperature of the hot water tank 1. A hot water tank temperature detecting means 12 and a control device 13 are provided.

  The conventional boiling control will be described with reference to FIG. 7 and FIG. 8. In the conventional boiling control, when there is a hot water supply load as shown in FIG. When the temperature of the hot water tank temperature detecting means becomes below a certain level, boiling is started.

  Therefore, boiling is started as shown in FIG. 8 when the activation determination condition is satisfied regardless of the power saving time zone by day and night due to the temperature condition of the hot water tank temperature detection means.

JP 2010-175146 A

  However, the conventional boiling control is set so as to boil a lot at night or at midnight when the running cost is low due to all electrification or midnight power rate setting.

  Therefore, in order to prevent hot water shortages, boiling is started when the temperature of the specified hot water tank temperature detecting means falls below a certain level. Therefore, depending on the temperature of the hot water tank temperature detecting means, a power saving time zone (eg, summer) There was a problem of boiling up from 13:00 to 15:00.

  The present invention solves the above-mentioned conventional problems, and in boiling control of a hot water storage type hot water supply apparatus, by prohibiting boiling in a power saving time zone, hot water storage that can contribute to stable power supply An object is to provide a hot water supply apparatus.

In order to solve the conventional problem, a hot water storage type hot water supply apparatus of the present invention includes a hot water storage tank, a heat pump for heating hot water in the hot water storage tank, and a plurality of the hot water storage tanks arranged in a height direction of the hot water storage tank. a hot water storage tank temperature detecting means for detecting a hot water temperature, and a control device, the power saving time zone set by the electric power company does not perform the boiling-up operation for heating the hot water of the hot water tank at the pump boiling of The user can set the heating operation prohibition time, and when the boiling operation prohibition time, the temperature of the hot water storage tank temperature detecting means is below a certain level, and the boiling operation is performed, the next day, The hot water supply heat amount predicted to be used during the boiling operation inhibition time is previously boiled before the boiling operation inhibition time .

As a result, when there is boiling in the power saving time zone, the next day, by boiling in advance in the time zone before the power saving time zone, it is possible to prevent hot water shortage, and in the power saving time zone. It is possible to avoid boiling.

  ADVANTAGE OF THE INVENTION According to this invention, in the boiling control of a hot water storage type hot water supply apparatus, it is possible to provide a hot water storage type hot water supply apparatus that can contribute to stable power supply by prohibiting boiling in the power saving time zone.

The figure which shows the boiling operation state of the day of the hot water storage type hot water supply apparatus in Embodiment 1 of this invention Diagram showing the relationship between hot water storage tank temperature and boiling operation of the hot water storage system The figure which shows the boiling temperature control of the hot water storage type hot water supply apparatus (A) The figure which shows the boiling operation state of the other day (previous day) of the hot water storage type hot water supply apparatus (b) The figure which shows the boiling operation state of the other day (next day) of the hot water storage type hot water supply apparatus (A) The figure which shows the other day boiling operation state of the hot water storage type hot water supply device (b) The figure which shows the other day boiling operation state of the hot water storage type hot water supply device Configuration diagram of a conventional hot water storage hot water supply system A figure showing an example of heat consumption on the same day Diagram showing boiling and boiling operation status on the same day

The first invention is a hot water storage tank, a heat pump for heating the hot water in the hot water tank, and a plurality of hot water tank temperature detecting means for detecting the temperature of the hot water in the hot water tank. In addition, the user can set a boiling operation prohibition time in which a heating operation for heating the hot water in the hot water tank is not performed by the heat pump in a power saving time zone set by an electric power company. When the temperature of the hot water storage tank temperature detecting means is below a certain level during the boiling operation prohibition time and the boiling operation is performed, it is predicted that the next day will be used for the boiling operation prohibition time. The hot water storage type hot water supply apparatus is characterized in that the amount of heat of hot water supply is previously heated before the boiling operation prohibition time, so that the risk of power failure can be reduced and stable power supply can be performed.

Moreover, it is possible to prevent the hot water from running out without boiling during the power saving period.

The second invention, on the next day, as from the previous day of the boiling-up temperature becomes a predetermined temperature higher boiling up temperature, a hot water storage type hot water supply device, characterized in that to perform the boiling-up operation.

As a result, hot water heating without considering boiling in the power saving time zone can be performed in advance by performing high temperature boiling in consideration of the amount of heat of hot water supply expected to be used in the power saving time zone. Can be prevented.

  In the case of this control, in the heat pump system, since the hot water tank temperature detection means for the boiling start determination target is the same and the total boiling flow rate is the same, boiling is performed without increasing the incoming water temperature. Therefore, it is possible to prevent running out of hot water without reducing the boiling efficiency.

Further, in the first invention, since the user can directly determine the amount of hot water supply for the day and set so as not to boil in a high power charge time period, it is assumed that hot water is prevented from running out. Optimal boiling can be performed.

  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)
The configuration of the hot water storage type hot water supply apparatus is the same as the configuration of FIG. Hereinafter, the operation and action of the hot water storage type hot water supply apparatus will be described.

  As a basic operation, the hot water tank 1 is filled with a lot of low-temperature water before boiling, and when the boiling operation is started, the low-temperature water in the lower part of the hot water tank 1 is cooled by a circulation pump 5 such as a heater or a heat pump. It is sent to the heating means 2 where it is heated and hot hot water is returned to the upper part of the hot water tank 1.

  As a result, hot water is stored in the hot water tank 1. Here, when using a heater for a heating means, you may install in the hot water storage tank.

  When using hot water after boiling, hot water in the hot water storage tank 1 discharged from the hot water supply pipe 4 is first mixed by the hot water supply mixing valve 9 together with low temperature water supplied by the water supply pipe 6.

  At this time, the opening degree of the hot water supply mixing valve 9 is set so that the hot water supply temperature detection means 10 indicates the temperature preset by the control device 13. Thereafter, it is guided to the hot water supply port 14. Further, low-temperature water corresponding to the amount of hot water used for hot water supply flows from the lower part of the hot water tank 1 through the water supply pipe 6.

  As shown in FIG. 1, the boiling control of the present invention is controlled so as to prohibit boiling in the power saving time zone and perform a large amount of boiling in advance before the power saving time zone.

  Therefore, it is possible to achieve both reduction of the risk of power failure and prevention of hot water outage due to reduction of power consumption during the peak power hours.

  Thus, by prohibiting boiling during the power saving time period, the amount of power in the power peak time period can be reduced without running out of hot water.

  FIG. 2 is a diagram showing a control for changing the start and stop of the boiling operation of the hot water tank temperature detecting means of the hot water storage type hot water supply apparatus.

  As shown in FIG. 2, when there is a boiling operation during a power saving time set by an electric power company, the next day, the hot water storage tank temperature detection means that is the object of the boiling activation determination of the previous day is one lower than the above. The boiling start determination is performed by the hot water tank temperature detecting means.

  Accordingly, it is possible to prevent hot water shortage by boiling in advance the amount of hot water supply that is predicted to be used in the power saving time zone before the power saving time zone.

  Also, as shown in FIG. 3, when there is a boiling operation in a power saving time zone set by an electric power company, boiling is performed at a temperature higher by a predetermined temperature than the previous day's boiling temperature on the next day.

  For this reason, hot water can be prevented from running out by preliminarily performing high-temperature boiling in consideration of the amount of hot water supply that is expected to be used in the power saving time period.

  In the case of this control, in the heat pump system, since the hot water tank temperature detection means for the boiling start determination target is the same and the total boiling flow rate is the same, boiling is performed without increasing the incoming water temperature. Therefore, it is possible to prevent running out of hot water without reducing the boiling efficiency.

  Also, when boiling occurs in the power saving time zone set by the electric power company as shown in FIG. 3, the total boiling time and the boiling start time are stored in the control device as shown in FIG. Starts boiling from the boiling start time of the previous day by going back the total boiling time.

  Therefore, the amount of hot water supply that is predicted to be used in the power saving time zone can be reliably boiled by the power saving start time, and hot water shortage can be prevented.

  Further, as shown in FIG. 5, a setting unit is provided so that the user can set the boiling prohibition time in the control device.

  As a result, it is possible to arbitrarily set the time for which boiling is prohibited in addition to the power saving time period, and the user can directly determine the hot water supply load for the day and set it so that boiling is not performed during the high power charge time period. Since it is possible, it is possible to perform an optimal boiling based on the premise of preventing hot water from running out.

  As described above, it contributes to reducing the risk of power failure without raising the peak power hours and prevents hot water from running out, so that it is possible to realize good usability and stable use of power.

  As described above, the hot water storage type hot water supply apparatus according to the present invention is an electric power company in the boiling control of a hot water storage type hot water supply apparatus that uses hot water heated by heating means such as a heater or a heat pump system in a hot water storage tank. Therefore, it is possible to apply to hot water storage hot water storage devices for home use and business use.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Heating means 3 Inlet piping 4 Outlet piping 5 Circulation pump 6 Supply water piping 7 Supply water temperature detection means 8 Hot water supply piping 9 Hot water supply mixing valve 10 Hot water supply temperature detection means 11 Hot water supply flow rate detection means 12 Hot water storage tank temperature detection means 13 Controller 14 Hot water outlet

Claims (2)

A hot water storage tank, a heat pump for heating the hot water in the hot water tank, a plurality of hot water tanks arranged in the height direction of the hot water tank, and a hot water tank temperature detecting means for detecting the temperature of the hot water in the hot water tank, and a control device. In addition, during the power saving time period set by the power company , the user can set the boiling operation prohibition time during which the heating pump does not perform the boiling operation for heating the hot water in the hot water tank, and in the boiling operation prohibition time When the temperature of the hot water storage tank temperature detecting means is below a certain level and the boiling operation is performed, on the next day, the hot water supply heat amount predicted to be used for the boiling operation prohibition time is A hot water storage type hot-water supply apparatus characterized by boiling in advance before the boiling operation prohibition time . The hot water storage type hot water supply apparatus according to claim 1 , wherein the boiling operation is performed on the next day so that the boiling temperature is higher by a predetermined temperature than the boiling temperature of the previous day.

Images