JPH05141779A - Boil-up controller for electric water heater - Google Patents

Abstract

PURPOSE:To save the power rate by a method wherein the boil-up of hotwater reserving units, arranged in living units and equipped with a boil-up unit respectively, is effected from the unit having a higher preferential order within the range of the maximum used amount of electric power. CONSTITUTION:A boil-up controller 11 for an electric water heater is arranged in the living unit U of an independent house, appartment houses and the like and is provided with a controller 12, controlling the boil-up, and boil-up units 2a, 2b as well as hot-water reserving units 1A, 1B, which are arranged at places at least two or more. The subject device is provided with an electric power used amount detecting means 14, detecting the used amount WT in a living unit U, the used time of electric power and the like quantitatively and temporality, a preferential order setting means 13, presetting the preferantial order of boil-up in a plurality of hot-water reserving units 1A, 1B, and a boil-up control means A, averaging the used amount or electric power per hour within the range of the maximum used amount of electric power WP in the living unit Y and commanding the reservation of boil-up hot-water sequentially in accordance with the set order of the preferential order setting means 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range of maximum power consumption of late-night power for a plurality of hot water storage units arranged in a so-called living unit such as a single-family or multi-family residence according to the purpose of use. The present invention relates to a boiling control device for an electric water heater, which is used internally to effectively and preferentially sequentially boil and store hot water.

[0002]

2. Description of the Related Art As a conventional boiling control device for an electric water heater, a hot water temperature control device for an electric water heater disclosed in JP-A-2-106655 and an electric water heater disclosed in JP-A-2-103338. There is a boiling control device. An example thereof is shown in the control block diagram of the boiling control device for the electric water heater in FIG.

In FIG. 4, 1 is a hot water storage tank, 2 is a heating element for boiling, 3 is hot water temperature measuring means, 4 is hot water amount setting means, 5 is a set hot water amount, the capacity of the hot water storage tank 1 and the heat generation of the heating element 2. Calculating means for calculating the net energization time, energization start time, and boiling water temperature based on the capacity, 6 is a power supply, 7 is late-night power detection means, 8 is heating element control means, and 9 is automatic boiling setting Means 10 is a residual hot water amount detecting means.

In the above construction, first, when the power source 6 is turned on, the boiling temperature is set to the maximum temperature, for example, 90 ° C. by the automatic boiling setting means 8. Then, the remaining hot water amount detecting means 10 detects the amount of remaining hot water in the hot water storage tank 1 to determine whether there is remaining hot water. If there is no remaining hot water, water is supplied and the heating element control means 8 energizes the heating element 2 to start boiling.

Next, the hot water tank 1 is measured by the hot water temperature measuring means 3.
The hot water temperature in the inside is measured, and then the calculation result of the boiling temperature is compared with the measured value of the hot water temperature by the calculation means 5. When the measured value of the hot water temperature reaches the calculated boiling temperature, the heating element control means Power supply to the heating element 2 is stopped by 8. At this time, the midnight power detection means 7 is controlled to shift the energization start time to the latter half of the midnight power supply time zone.

[0006]

In the conventional example, since the boiling of the electric water heater is controlled as described above, the water is often boiled up regardless of the amount of electric power used in the living unit. There is a problem in that the electric power is used by exceeding the maximum amount of electric power used, and the electric power usage fee increases.

The present invention has been made in order to solve the above-mentioned problems of the conventional example, and a plurality of hot water storage portions, each of which is provided in the living unit and is equipped with a boiling portion, are provided from a necessary location. An electric water heater that preferentially controls boiling and smoothes the power usage per hour with the aim of maximum power usage to boil, effectively uses late-night power, and reduces power charges. The purpose is to provide a boiling control device.

[0008]

For this reason, the boiling control apparatus for an electric water heater according to the present invention is provided with a control unit for controlling the boiling and hot water supply of the water supply and at least two locations within the living unit. Provided with a hot water storage unit provided with a boiling unit in each, the midnight power detection means for detecting the midnight power time zone,
Electric power consumption detecting means for quantitatively detecting electric power consumption and power consumption time etc. in the living unit at any time, priority setting means for presetting the boiling priority of the plurality of boiling parts, and By including the boiling control means for smoothing the power usage per hour within the range of the maximum power usage of the living unit and sequentially controlling the boiling hot water of the supplied water according to the setting order of the priority setting means, It is an attempt to achieve the purpose.

[0009]

The boiling control device for an electric water heater according to the present invention having the above-described structure is arranged in a living unit, and a plurality of hot water storage units each having a boiling unit are arranged in accordance with the order of priority. Boiling control is performed comprehensively within the range of the maximum power consumption from the required location, whereby the low-price late-night power is effectively used and the power consumption is reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (Structure) FIG. 1 is a control block diagram of a boiling control apparatus for an electric water heater showing an embodiment of the present invention, and FIG. 2 is a flow chart showing a flow of control signals in the above embodiment.

In FIGS. 1 and 2, 1A and 1B are hot water storage portions, 2A and 2B are boiling portions provided with an electric heater, 11 is a boiling control device for an electric water heater, and 12 is a boiling control device. A control unit, 12a is a microcomputer (hereinafter referred to as a microcomputer) arranged in the control unit 12, 13 is a priority setting means for boiling, and 14 is a so-called living unit U such as a single-family house or an apartment house. The power consumption detecting means, 15 is a clock for transmitting a time signal. Further, A is a boiling control means for controlling the boiling of the boiling portions 2A and 2B, and S is a sensor including a hot water temperature sensor and a residual hot water amount sensor.

(Operation) An operation will be described based on the above configuration. In the flowchart of FIG. 3, first, when the power supply 6 is turned on, the boiling priority is set by the boiling priority setting means 13 in step S1 (the following steps are omitted) based on the hot water supply usage states from the hot water storage units 1A and 1B. Set the priority. Next, in S2, the time signal from the clock 15 and the midnight power detection means 7 determine whether or not it is in the midnight power time zone. Subsequently, detecting the power consumption W _T in the residential unit U by the power consumption detecting means 14 at S3, it can boiling by subtracting the power consumption W _T from the maximum power usage W _P in S4 power amount W _H To calculate. Then S
5, the remaining hot water amount and hot water temperature of each hot water storage unit 1A, 1B are detected by the sensor 2A,
It is detected in 2B and the possible boiling amount is calculated in S6. Based on this, in S7, the final priority of boiling, conditions such as boiling amount and temperature are set, and the heater of either of the boiling parts 2A, 2B having a higher priority is instructed to be energized and the energization is started. Then, boiling is performed based on the set conditions. When the boiling is completed in S9, the energization of the heaters of the energized boiling portions 2A and 2B is stopped, and then S10 is performed.
Then, the midnight power detection means 7 detects again whether it is still in the midnight power time zone, and if it is judged to be in the midnight power time zone, S
It is fed back to 3 and the above operation is repeated until it is not in the midnight power time zone. If it is determined in S10 that it is not in the midnight power time zone, the boiling is ended.

As described above, a plurality of hot water storage units 1A, 1B arranged near the hot water supply use location in the living unit U are
The amount of hot water used is controlled within the range of the maximum amount of electric power used, and boiling is performed sequentially from the boiling parts of the hot water storage units 1A and 1B that have a high priority for boiling. By smoothing within the range of power consumption, there will be no power usage exceeding the maximum power usage, and late-night power can be used very effectively to reduce power charges. This makes it possible to realize an electric water heater equipped with a highly economical boiling control device.

In the above embodiment, the case where there are two hot water storage portions has been described, but the present invention is not limited to this, and it is needless to say that boiling can be controlled by providing a plurality of hot water storage portions at two or more locations. .

[0015]

As described above, according to the present invention, of the plurality of hot water storage units arranged in the living unit, the maximum power consumption is preferentially given to the boiling unit of the hot water storage unit that uses a large amount of hot water. Since the boiling was controlled so as to sequentially boil within the range of, the power consumption of the midnight power is smoothed, the use of power exceeding the maximum power usage is suppressed, and the midnight power is used very effectively. You can save electricity bills.

[Brief description of drawings]

FIG. 1 is a control block diagram of a boiling control device for an electric water heater showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a flow of control signals in the above embodiment.

FIG. 3 is a flowchart of the operation of the embodiment.

FIG. 4 is a control block diagram of a boiling control device for a conventional electric water heater.

[Explanation of symbols]

1A, 1B Hot water storage section 2A, 2B Boiling section 7 Midnight power detection means 11 Boiling control device for electric water heater 12 Control section 13 Priority setting means 14 Power consumption detection means A Boiling control means U Living unit W _P Max electric energy boiling power usage W _H power usage W _T in the residential units Incidentally, the same reference numerals denote the same or corresponding parts.

Claims (1)

[Claims] 1. A control unit for controlling boiling and hot water supply of hot water, and a hot water storage unit provided at least at two or more places in a living unit and each having a boiling unit, and detects a midnight power time zone. Late-night power detection means, power usage detection means for quantitatively detecting power usage and power usage time within the living unit, etc. at any time, and priority for presetting the boiling priority of the plurality of boiling parts Order setting means and boiling control means for smoothing the power usage per hour within the range of the maximum power usage of the living unit and sequentially controlling the boiling hot water of the supplied water according to the setting order of the priority setting means. A boiling control device for an electric water heater, characterized by being provided.