JP2010243120A - Water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water heater capable of achieving high efficiency without running-out of hot water by increasing and decreasing a supply amount of hot water used while considering characteristic of a hot water use pattern. <P>SOLUTION: This water heater includes a heating means 2 for heating the water in a hot water storage tank 1, a boiling-up heat quantity deciding means 3 for deciding a boiling-up heat quantity by the heating means 2, used-heat quantity measuring means 4, 5, 6, 15, 16 measuring hot water supply usage heat quantity by a user, and an used-function storing means 18 for storing a function used by the user. The boiling-up heat quantity deciding means 3 is composed of a basic boiling-up heat quantity operating means 19 for operating the boiling-up heat quantity of the day from an average value and a deviation value of used heat quantity on a day-to-day basis, on the basis of contents stored in an used-heat quantity storing means 20 storing the used-heat quantity of the day before measured by the used-heat quantity measuring means 4, 5, 6, 15, 16 for a predetermined specific period by each prescribed time, and a boiling-up heat quantity correcting means 21 for correcting a result of the operation by the basic boiling-up heat quantity operating means 19. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a water heater that uses boiled hot water stored in a hot water storage tank.

  Conventionally, this kind of hot water supply has a thing like FIG. 3, for example (for example, refer patent document 1).

  FIG. 3 shows a conventional water heater described in Patent Document 1. As shown in FIG. As shown in FIG. 3, a hot water tank 1 and a heating means 2 for heating the water in the hot water tank 1 are provided, and one day is divided into a plurality of time zones, and the amount of heat used in each time zone is stored. The heating heat amount determining means 3 for controlling the heating means 2 is provided so that the necessary heat amount can be secured for each time zone.

JP 2007-147246 A

  However, in the above-described conventional configuration, hot water is prevented from running out by keeping the required amount of water heated up before the corresponding time zone. However, if the usage pattern is constant every day, the amount of hot water stored and used Although the amount will match, if the irregularity is high, there will be a problem that the hot water will run out without boiling where it must be boiled, or the water will boil up and not be used. In order to avoid this, if a certain amount of margin is observed for each time zone, the amount of boiling is excessively increased, resulting in an increase in waste. In addition, depending on the use of hot water, the content that should be considered when boiling is different, such as it will not be possible to demonstrate sufficient performance unless the boiling temperature is raised, and it is not enough to ensure the necessary amount of heat alone was there.

  The present invention solves the above-mentioned conventional problems, increases or decreases the amount of hot water that can be used in consideration of the characteristics of the hot water usage pattern, enables boiling operation according to the application, An object of the present invention is to provide a water heater capable of obtaining high efficiency without causing it.

  In order to solve the above-mentioned conventional problems, the water heater of the present invention includes a hot water storage tank, heating means for heating the water in the hot water storage tank, boiling heat amount determination means for determining the amount of boiling heat by the heating means, It comprises a heat utilization measuring means for measuring the amount of heat used by the user for hot water supply, and a utilization function storage means for storing the function used by the user, wherein the boiling heat quantity determination means is measured by the utilization heat amount measurement means. Based on the stored contents of the used heat quantity storage means for storing the used heat quantity up to the previous day every predetermined time for a predetermined period of time, the average value and deviation value of the used heat quantity per day From the basic boiling heat amount calculation means for calculating the amount of heating heat of the day from the above, and boiling that corrects the calculation result by the basic boiling heat amount calculation means based on the stored contents of the use function storage means It is characterized in being composed of a quantity correction means.

  As a result, the amount of hot water or the amount of heat to be heated is determined based on the average value and deviation value of the total amount of hot water used in a day, and these are determined according to the irregularity of the usage pattern obtained from the functions used. Increase or decrease the amount of hot water and heat.

  According to the water heater of the present invention, the amount of hot water that can be used is increased or decreased in consideration of the characteristics of the hot water usage pattern, and the boiling operation according to the application is enabled, and high efficiency without causing hot water shortage. Can be provided.

Configuration diagram of a water heater in Embodiment 1 of the present invention Schematic diagram of stored values and calculated values for the amount of heat used and functions used Configuration of a conventional water heater

  1st invention is a hot water storage tank, the heating means which heats the water of the said hot water tank, the boiling heat amount determination means which determines the amount of boiling heat by the said heating means, and the utilization heat quantity which measures the hot water use heat amount by a user Measuring means and use function storage means for storing the function used by the user, the boiling heat amount determining means is a predetermined constant amount of heat used up to the previous day measured by the use heat amount measuring means. Based on the stored heat amount storage means stored every period and every predetermined time, the basis for calculating the heating heat amount of the day from the average value and deviation value of the daily use heat amount based on the stored contents of the used heat amount storage means A heating heat amount calculating means; and a heating heat amount correcting means for correcting a calculation result by the basic boiling heat amount calculating means based on the stored contents of the use function storage means. If there is a high irregularity that is difficult to predict, or if there is a large percentage of functions that are prone to running out of water, the amount of boiling water is set to be the basic amount of boiling water so that it is safer against running out of hot water. However, if it is not, it contributes to improving the efficiency by reducing it. Therefore, it is possible to perform operation control that can satisfy both user-friendliness and energy-saving characteristics adapted to the usage pattern of the user.

  The second invention is a hot water supply means for mixing hot water in a hot water tank with hot water and supplying hot water at a predetermined temperature, a bath, and a hot water supply means for mixing hot water in a hot water tank with hot water and supplying the hot water to the bathtub, A bath replenishing means for exchanging heat by exchanging heat between the hot water in the hot water storage tank and the hot water in the bathtub, and the use function storage means includes the hot water supply means, the bath hot water supply means, and the bath replenishment means. It is characterized by having a configuration that stores at least one operating state, and it can grasp the functions installed in this type of water heater, which has a different degree of influence on efficiency, as necessary, so that it can be heated up as necessary. Precise prediction is possible in calculating the amount of heat, which improves usability and energy saving.

  The third invention is characterized in that the heating means is a heat pump cycle, and as a result of being able to apply a boiling temperature as low as possible only when the amount of hot water used is large, the maximum efficiency can be achieved. It can be drawn to the limit.

  The fourth invention is characterized in that the heat pump cycle is a supercritical refrigerant circuit that is boosted to a supercritical pressure during operation. Since the boiling temperature can be increased, the amount of heat that can be used and the hot water can be increased. Cutting resistance can be improved.

  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 is a diagram showing a configuration of a water heater in an embodiment of the present invention.

In FIG. 1, a hot water tank 1 and a heat pump unit 2 having a heat pump cycle (not shown) as a heating means for heating the water in the hot water tank 1, and the amount of heat used to detect the temperature of hot water coming out of the hot water tank 1 when hot water is supplied. Hot water storage tank temperature detection means 4 as measuring means, water supply flow rate detection means 5 for detecting the flow rate of the hot water flowing into the hot water storage tank 1 at the time of hot water supply, water supply temperature detection means 6, bathtub 7, hot water and water supply of the hot water tank 1 And a mixing valve 8 and a three-way valve 9 as bath filling means for supplying hot water to the bathtub 7, and a bath provided to the operation remote controller 10 and operated by the user to start filling the bathtub 7. A hot water filling start switch 11 is provided.

  Also, a heat exchanger 12 and a first circulation pump 13 and a second circulation pump 14 as bath reheating means for exchanging heat by exchanging hot water in the hot water tank 1 and hot water in the bathtub 7, The heat exchanger inlet water temperature detecting means 15 as a utilization heat quantity measuring means for detecting the water temperature of the primary inlet of the heat exchanger 12, and the heat exchanger flow rate detecting means 16 for detecting the primary flow rate of the heat exchanger 12. And a bath renewal start switch 17 which is provided in the operation remote controller 10 and is operated by a user to start the circulation pumps 13 and 14.

  Further, the hot water tank hot water temperature detection means 4, the feed water flow rate detection means 5, the feed water temperature detection means 6, the heat exchanger inlet water temperature detection means 15, the heat exchanger flow rate detection means 16, and the feed water temperature detection as the utilization heat amount measurement means. Utilization heat quantity storage means 18 for obtaining and storing the utilization heat quantity from the means 6, and basic boiling heat quantity for obtaining the heating heat quantity for the day based on the stored average value and deviation value of the utilization heat quantity for the past week. Use function storage for individually storing the time and operation time when the calculation means 19 and the bath hot water start switch 11 or the bath hot water start switch 17 are operated to start the bath hot water function and the bath hot water start function. And heating heat amount correcting means for correcting the amount of boiling heat obtained by the basic boiling heat amount calculating means 19 based on the storage contents of the means 20 and the use function storage means 20 And a heat determination unit 3 boiling composed of one Tokyo.

  About the hot water heater comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  As a basic operation, the hot water tank 1 is filled with a lot of low-temperature water before boiling, and when the operation is started, it is sent from the heat pump outlet 23 to the heat pump unit 2 by the circulating pump 22 for boiling. The heated hot water is returned to the hot water tank 1 from the heat pump return port 24. Accordingly, hot water is stored in the hot water tank 1 sequentially from above.

  When hot water is used after boiling, hot water in the hot water storage tank 1 is sent from the hot water supply port 25, and this hot water is mixed with the water supplied from the water supply pipe 26 by the mixing valve 8, adjusted to the set temperature, and hot water supplied. Supplied from the stopper 27. Further, water corresponding to the amount of hot water used for hot water supply flows from the water supply port 27 at the lower part of the hot water tank 1 through the water supply pipe 26.

  When the bath hot water start switch 11 provided on the operation remote controller 10 is pressed by the user, the three-way valve 9 is switched to the bath hot water side, and hot water is stored from the hot water outlet 25 in the same way as hot water use. Hot water in the tank 1 is fed, and this hot water is mixed with the feed water from the feed water pipe 26 by the mixing valve 8, adjusted to the set temperature, and supplied to the bathtub 7.

  In addition, when the bath reheating start switch 17 provided on the operation remote controller 10 is pushed by the user, the three-way valve 9 is switched to the bath retreating side and the first recirculation pump 13 is operated. The second circulation pump 14 is activated, and the hot water in the hot water tank 1 and the hot water in the bathtub 7 are sent to the temporary flow path of the heat exchanger 12 through the bath follow-up port 29 of the hot water tank 1. The hot water inside is sent to the secondary flow path of the heat exchanger 12. The hot water on the primary side after the heat exchange is returned to the hot water tank 1 through the bath retreat return port 30.

Here, the water heater of the present embodiment contributes to energy saving by reducing the excess of hot water by determining the appropriate amount of boiling water for the day according to how the user uses the hot water, and is easy to use due to running out of hot water. It has a function to prevent deterioration.

  FIG. 2 shows a schematic diagram of stored values and calculated values related to the amount of heat used and the function used.

  In FIG. 2, 31 is the amount of heat used from one day before to seven days before stored in the heat usage storage means 18. The values of these heat usage amounts are obtained by multiplying the difference between the hot water tank temperature and the feed water temperature by the feed water flow rate using the outputs of the hot water tank hot water temperature detecting means 4, the feed water flow rate detecting means 5 and the feed water temperature detecting means 6. The difference between the heat exchanger inlet water temperature and the feed water temperature is multiplied by the heat exchanger flow rate using the outputs of the heat exchanger inlet water temperature detection means 15, the heat exchanger flow rate detection means 16 and the feed water temperature detection means 6. Is the total.

  The basic boiling heat amount calculation means 19 calculates a daily use heat amount average value / standard deviation 32 from the use heat amounts for the past one week. Based on the daily average value / deviation value 32, the average value and the standard deviation are summed as the amount of heat to be heated on that day, and this is used as the basic amount of heat to be heated 33.

  On the other hand, 34 is the stored contents of the use function storage means 20, in which the time when the bath hot water start switch 11 is pressed by the user is set to a numerical value in minutes for the past one week, and the bath renewal start switch 17 is set. After being pressed, the time taken for the bath chasing to end is memorized in units of minutes for each day. As for these values, the hot water filling, reheating average value, and standard deviation 35 are calculated in the same manner as the amount of heat used. Here, this value indicates the variation of the usage pattern, and hot water is more likely to occur as the value increases. Also, bathing for a long time is prone to running out of hot water.

  The boiling heat amount correction means 21 calculates the boiling heat amount correction value 36 using the hot water filling, reheating average value, and standard deviation 35, and increases or decreases the basic boiling heat amount 33 to obtain the final heating heat amount 37 on the same day. decide. In particular, the smaller the standard deviation of the hot water filling time and the shorter the bath reheating time, the smaller the risk of running out of the hot water.Therefore, the amount of boiling heat is reduced to increase energy savings, and vice versa. Reduce the risk of cutting.

  As described above, the amount of heat generated on the current day determined by the average value and standard deviation of daily heat consumption over the past week is corrected by the bath filling time and bath replenishment time performed by the user. If the degree of irregularity is large and it is difficult to predict, increase the amount of heating to be safer against hot water, and if the degree of irregularity is low, reduce the amount of heating Therefore, it is possible to perform operation control that can achieve both user-friendliness adapted to the usage pattern and energy saving.

  The refrigeration cycle of the heat pump unit 2 preferably uses carbon dioxide as a refrigerant and is operated at a pressure exceeding the critical pressure. Since the boiling temperature can be increased by using carbon dioxide as a refrigerant, it is possible to increase the amount of heat that can be used and to prevent the hot water from running out.

  As described above, since the water heater according to the present invention can realize a control method that achieves both high efficiency and convenience, it can be applied to a hot water storage tank of a domestic water heater as described above, as well as a heat source and a hot water tank. It can also be applied to large-scale applications such as for business use in a system having a high level of convenience for facility managers.

1 Hot water tank 2 Heating means (heat pump unit)
DESCRIPTION OF SYMBOLS 3 Boiling heat amount determination means 4 Hot water tank hot water temperature detection means 5 Feed water flow rate detection means 6 Feed water temperature detection means 7 Bathtub 8 Mixing valve 9 Three-way valve 10 Operation remote control 11 Bath hot water start switch 12 Heat exchanger 13 First circulation pump 14 Second circulation pump 15 Heat exchanger inlet water temperature detection means 16 Heat exchanger flow rate detection means 17 Bath reheating start switch 18 Use heat amount storage means 19 Basic boiling heat amount calculation means 20 Use function storage means 21 Boiling heat amount correction means

Claims (4)

A hot water storage tank, heating means for heating the water in the hot water tank, boiling heat amount determination means for determining the amount of boiling heat by the heating means, utilization heat amount measuring means for measuring the amount of heat used by the user for hot water supply, and user Use function storage means for storing the function used by the heating heat amount determination means, the heating heat amount determination means, the heat consumption until the previous day measured by the utilization heat amount measurement means for a predetermined period of time, a predetermined time Use heat storage means for storing the heat, and based on the stored contents of the use heat storage means, basic heating heat calculation means for calculating the heating heat amount of the day from the average value and deviation value of the daily use heat quantity; And a heating heat quantity correction means for correcting the calculation result by the basic boiling heat quantity calculation means based on the stored contents of the use function storage means. Hot water supply means for mixing hot water in a hot water tank with hot water and supplying hot water at a predetermined temperature; Bathtub; Hot water supply means for supplying hot water in a hot water tank with hot water and supplying the bathtub; and hot water in the hot water tank; A bath replenishing means for exchanging heat by exchanging the hot water in the bathtub, and the use function storage means has at least one operation state of the hot water supply means, the bath hot water supply means, and the bath replenishment means. The hot water heater according to claim 1, wherein the hot water heater is configured to store. The water heater according to claim 1 or 2, wherein the heating means is a heat pump cycle. The water heater according to claim 3, wherein the heat pump cycle is a supercritical refrigerant circuit that is boosted to a supercritical pressure during operation.

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