JPH05118572A - Hot water storage type hot water supplying apparatus - Google Patents

Abstract

(57) [Summary] [Purpose] Letting you know how much remaining hot water in the hot water storage tank is converted to the hot water supply temperature desired by the user, eliminating the anxiety about shortage of hot water when using it, and eliminating hot water shortage and excess hot water. Avoid it. [Structure] The water in the hot water storage tank 1 supplied from the bottom is
The condenser 7 is heated to a predetermined boiling temperature, tapped from the top and mixed with water to supply hot water. A plurality of hot water temperature sensors 12a to 12f are provided in the hot water storage tank 1 at predetermined intervals in the vertical direction.
By the controller 11, the mixed water temperature T ₀ represented by the detection signal of the water temperature sensor 13, the hot water temperature Ti by the hot water temperature sensor, each partial volume Vi of the tank corresponding to the predetermined interval, and the user's input from the input button 14 are desired. The available hot water amount Tu is calculated based on the hot water supply temperature Tu of
Display on CD15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a function of displaying the amount of remaining hot water, heating water in a hot water storage tank supplied from the bottom to a boiling temperature, tapping hot water from the top and mixing with water. The present invention relates to a hot water storage type hot water supply device.

[0002]

2. Description of the Related Art Conventionally, as this type of hot water storage type hot water supply device,
For example, the one described in Japanese Utility Model Laid-Open No. 2-30016 is known. This hot water storage type hot water supply device is provided with a hot water temperature sensor at each position that divides the total volume of the standing hot water storage tank into four equal parts in order to display the amount of hot water remaining in the tank together with its temperature. The signal is processed by the controller and output to the display unit. As shown in FIG. 4, the display unit 21 equally divides the whole into four regions 21a to 21d corresponding to the hot water temperature sensors,
The detection signals of the downward sensors from the hot water temperature sensor at the upper end of the tank are sequentially output from the downward end region 21a to the upward regions. Each area is LCD (L
An oblique thin line pattern 22 and a thick line pattern 23 are alternately arranged on a display unit made of an icd crystal display. If the hot water temperature indicated by the detection signal is less than 40 ° C., both patterns 22 and 23 are not energized. If the temperature is up to 60 ° C, only the thin wire pattern 22 is energized, and if it exceeds 60 ° C, both patterns 22 and 23 are energized. Therefore, in the example of FIG.
The upper half of the temperature of the hot water in the tank exceeds 60 ° C, and the upper half of the lower half has a temperature of 40 to 60 ° C and the lower half of the temperature is lower than 40 ° C. That is, the user can see the display unit 21 and find that there is 300 L of hot water having a temperature of 40 ° C. or higher, and 200 L of the hot water exceeds 60 ° C.

[0003]

However, since the above-described conventional hot water storage type hot water supply device only indicates the amount of remaining hot water in the hot water storage tank together with its temperature on the display unit 21, the user needs to know the amount of hot water in the tank. Even if the state is known, it is not possible to know how much hot water can be actually used at the desired hot water supply temperature after being mixed with water from the hot water storage tank. For this reason, an excess or deficiency will inevitably occur between the amount of hot water stored in the hot water storage tank and the amount of hot water at the hot water supply temperature expected by the user, and the additional heating of the hot water storage tank will be delayed, causing insufficient hot water or excessive additional heating. There is a drawback in that energy is wasted due to heat dissipation due to excess hot water.

Therefore, an object of the present invention is to display the amount of residual hot water in the hot water storage tank in terms of the hot water supply temperature desired by the user, so that the user can appropriately understand the situation of the residual hot water. An object of the present invention is to provide a user-friendly hot water storage type hot water supply device capable of using hot water and eliminating anxiety about lack of hot water and energy loss due to excess hot water.

[Means for Solving the Problems]

In order to achieve the above object, the hot water storage type hot water supply apparatus of the present invention uses, as shown in FIG. 1, heating means 7 to heat the water in the hot water storage tank 1 supplied from the bottom to a predetermined boiling temperature. In the case of heating and discharging hot water from the top of the hot water storage tank 1 to mix with water to supply hot water, a water temperature sensor 13 for detecting the temperature T ₀ of the mixed water, and the hot water storage tank 1
A plurality of hot water temperature sensors 12a to 12f provided at predetermined intervals in the vertical direction for detecting the hot water temperature Ti in the tank, and an input means 14 for inputting a hot water supply temperature Tu desired by the user.
And the water temperature T ₀ represented by the detection signal of the water temperature sensor 13,
Based on the hot water temperature Ti represented by the detection signals of the hot water temperature sensors 12a to 12f, the tank volume Vi corresponding to the predetermined interval, and the hot water supply temperature Tu input from the input means 14, the hot water supply possible volume Vu is calculated. Hot water amount calculating means 11,
It is characterized in that it is provided with a display means 15 for displaying the hot water supplyable hot water amount Vu obtained by the hot water amount calculating means 11.

[0006]

Operation: The water in the hot water storage tank 1 is heated by the heating means 7 at night.
Is heated to reach a predetermined boiling temperature. The boiling water in the hot water storage tank 1 is discharged from the top in the daytime by the amount requested by the user, mixed with water, and supplied. Then, an amount of water commensurate with the tap water is replenished from the bottom into the tank 1, and the water in the tank 1 is additionally heated by the heating means 7 as necessary. The user selects the desired hot water supply temperature Tu
The temperature T ₀ of the water mixed in the hot water is detected by the water temperature sensor 13, and the hot water temperature Ti in the hot water storage tank 1 is provided at predetermined intervals in the vertical direction of the tank. It is detected by the hot water temperature sensors 12a to 12f. The hot water amount calculation means 11 determines the difference (Ti-Tu) between the hot water temperature Ti detected by the hot water temperature sensors 12a to 12f and the hot water supply temperature Tu.
The volume Vi of the tank occupied by the hot water temperature sensor is multiplied and cumulatively added. The cumulative result is the difference (Tu-T) between the hot water supply temperature Tu and the water temperature T _0.
0 ) to obtain the mixed water amount Vx, and the total volume V of the hot water storage tank 1 is added to this to calculate the hot water supplyable hot water amount Vu (= Vx + V). The hot water supplyable hot water amount Vu calculated in this way is displayed by a numerical value or the like on the display means 15. Thus, the user can know how much remaining hot water in the hot water storage tank 1 is converted into the desired hot water supply temperature Tu by looking at the displayed numerical values, etc. In addition to eliminating the anxiety, the degree of additional heating can be adjusted based on the above values and the like to avoid hot water shortage and hot water surplus.

[0007]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a schematic view showing an example of a hot water storage type hot water supply device. This hot water supply device comprises a hot water storage tank 1 and a water supply pipe 2 for supplying tap water to the bottom of the hot water storage tank 1 via a pressure reducing valve 3.
And a circulation line 5 that branches from a three-way valve 4 provided in the water supply pipe 2 and reaches the bottom of the hot water storage tank 1 via a pump 6, and a circulation line 5 by switching the three-way valve 4 and driving the pump 6. A condenser 7 for heating the water in the circulating hot water storage tank 1 and the hot water storage tank 1
A hot water supply pipe 8 for discharging hot water heated to a predetermined boiling temperature from the top of the hot water supply pipe, and hot water provided between the hot water supply pipe 8 and the hot water to be discharged.
Mixing water pipe 10 branched from the water supply pipe 2 on the downstream side of the pressure reducing valve 3.
A mixing stopper 9 for mixing the water of FIG. The controller 11 controls the capacity and operation time of a compressor of a heat pump type refrigeration circuit (not shown) connected to the condenser 7 to make a predetermined amount of water supplied to the hot water storage tank 1 by making maximum use of nighttime electric power. In addition to heating to the boiling temperature of, it also serves as an input means, a hot water amount calculation means, and a display means which will be described later. It should be noted that the heating by the condenser 7 is performed as necessary by the user's operation even during the hot spring operation such as during the daytime.

On the side wall of the hot water storage tank 1, the hot water temperature in the tank Ti (i
= 1 to 6), hot water temperature sensors 12a to 12f are provided. The inside of the hot water storage tank 1 is partitioned by a horizontal partition wall that obstructs the convection of the hot water at an intermediate point of each hot water temperature sensor, and the volume of each part partitioned by this partition wall, that is, the volume of the tank occupied by each hot water temperature sensor is V _{1 to} V ₆ and the sum of these is the total volume V of the tank (V = V ₁ + V ₂ + ... + V ₆ ). On the other hand, a water temperature sensor 13 that detects the temperature of water is provided in the mixed water pipe 10 near the water supply pipe 2.

The controller 11 has an input button 14 (see S1 in FIG. 3) for inputting a hot water supply temperature Tu desired by the user as an input means, and an LCD 15 (see FIG. 3) for displaying a hot water supply possible hot water amount Vu described later as a display means. 3) (see S5) and a display command button 16 (see S2 in FIG. 3) for instructing the calculation and display of the hot water supply potential Vu. Further, the controller 11 serves as the hot water amount calculating means, and each hot water temperature sensor 12a.
-12f, the difference (Ti-Tu) between the hot water temperature Ti (see S3 in FIG. 3) and the hot water supply temperature Tu input by the user is multiplied by the volume Vi of the tank occupied by the hot water temperature sensor, and then added. Accumulation result [(T ₁ −Tu) V ₁ + (T ₂ −Tu) V ₂ + ... + (T ₆ −T
u) V ₆ ] is divided by the difference (Tu−T ₀ ) between the hot water supply temperature Tu and the water temperature T ₀ detected by the water temperature sensor 13 to obtain the mixed water amount Vx. The formula for calculating the mixed water amount Vx is derived from the following formula in which the retained heat amount of the hot water before mixing and the mixed water is equal to the retained heat amount of the hot water supply after mixing. (i = 1 to 6) ΣTiVi + T ₀ Vx = Tu (Vx + V) where V
= (I = 1 to 6) ΣVi Next, the total volume V of the hot water storage tank 1 is added to the mixed water amount Vx to calculate the hot water supplyable hot water amount Vu (= Vx + V) (see S4 in FIG. 3).

As shown in FIG. 2, the controller 11 numerically displays the calculated hot water supplyable hot water amount Vu on the attached LCD 15 together with the hot water supply temperature Tu inputted by the user (FIG. 3).
See S5). As can be seen from FIG. 2, the input button 14 has a lowering button 14a for gradually decreasing the numerical value of the hot water supply temperature Tu and a raising button 14b for gradually increasing the numerical value when continuously pressed.
Consists of.

The operation of the hot water storage type hot water supply apparatus having the above configuration will be described with reference to FIG.
Will be described next with reference to. The water in the hot water storage tank 1 is heated by the condenser 7 at night under the control of the controller 11, and the whole reaches a predetermined boiling temperature. The boiling water in the hot water storage tank 1 is discharged from the top in the daytime by the amount requested by the user,
The water is mixed with water in the mixing tap 9 to supply hot water. And
The amount of water commensurate with the hot water is passed from the bottom through the three-way valve 4 to the tank 1.
The water in the tank 1 is replenished into the inside of the tank 1 and is additionally heated by the condenser 7 by the user's operation as needed. When the user inputs a desired hot water supply temperature Tu with the input button 14 of the controller 11 in step S1 and presses the display command button 16 in the hot water operation time zone, the controller 11 determines that the result is positive in step S2, In step S3, the detection signals of the water temperature sensor 13 and the hot water temperature sensors 12a to 12f are received. Then, in step S4, based on the hot water temperature Ti represented by the detection signals of the hot water temperature sensors, the hot water supply temperature Tu, the tank volume Vi occupied by the hot water temperature sensors, and the water temperature T ₀ represented by the detection signals of the water temperature sensors. The mixed water amount Vx is calculated by the following formula. Vx = {(i
= 1 to 6) Σ (Ti-Tu) Vi} / (Tu-T ₀ ) Then, the total volume V of the hot water storage tank 1 is added to the obtained mixed water amount Vx.
Is added to calculate the available hot water supply amount Vu (= Vx + V). Thereafter, in step S5, the controller 11 numerically displays the hot water supplyable amount Vu on the attached LCD 15 together with the hot water supply temperature Tu input by the user, as shown in FIG.

In this way, the user simply sees the numerical value Vu displayed on the LCD 15 attached to the controller 11 to find out how much L the remaining hot water in the hot water storage tank 1 is converted into the desired hot water supply temperature Tu. Can know. Therefore, the user's anxiety about shortage of hot water at the time of hot water supply is eliminated, and the user can use the hot water supply amount Vu as a guideline for the condenser 7
By adjusting the degree of additional heating by, it is possible to avoid inconvenience due to insufficient hot water and energy loss due to excess hot water. That is, the hot water storage type hot water supply device of the present invention is very convenient for the user.

In the above embodiment, since the display command button 16 is provided, the desired hot water supply temperature T is maintained unless this button is pressed.
Even if u is input, the amount Vu of hot water that can be supplied is not calculated or displayed, and a check function is provided to further improve usability.
Further, since the controller 11 for controlling the boiling water also functions as the input means, the hot water amount calculating means and the display means, there is an advantage that the apparatus can be configured relatively simply and inexpensively. The heating means of the present invention is not limited to the condenser of the embodiment and may be an electric heater. Further, the display means is
The amount of hot water that can be supplied is not limited to the numerical value, and the color or the graph may be displayed. Further, the controller 11 may automatically adjust the opening degree of the mixing stopper 9 to obtain the calculated mixed water amount Vx. However, the hot water temperature that the user wants to use is always the hot water supply temperature Tu.
Since it is not always the case, it is desirable to mix hot water with water at a place where it is actually used.

[0014]

As is clear from the above description, in the hot water storage type hot water supply apparatus of the present invention, the water in the hot water storage tank supplied from the bottom is heated to the predetermined boiling temperature by the heating means, and the hot water is discharged from the top. In the case of supplying hot water after mixing with water, the hot water storage tank is provided with a plurality of hot water temperature sensors at predetermined intervals in the vertical direction, and the hot water amount calculating means shows the mixed water temperature represented by the detection signal of the hot water temperature sensor, the hot water temperature sensor. Hot water temperature, the volume of the tank corresponding to the above predetermined interval and the amount of hot water that can be supplied based on the desired hot water temperature input by the user from the input means,
Since the amount of hot water that can be supplied is displayed on the display means, the user can immediately know how much of the remaining hot water in the hot water storage tank is converted into the desired amount of hot water. It eliminates the anxiety about lack of hot water and avoids lack of hot water and excess hot water.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a hot water storage type hot water supply apparatus of the present invention.

2 is an enlarged view showing details of the controller of FIG. 1. FIG.

FIG. 3 is a flowchart showing a flow of operations of the hot water storage type hot water supply device.

FIG. 4 is a diagram showing a display unit of a conventional hot water storage type hot water supply device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hot water storage tank, 2 ... Water supply pipe, 4 ... Three-way valve, 5 ... Circulation pipeline, 6 ... Pump, 7 ... Condenser, 8 ... Hot water supply pipe, 9 ... Mixing tap, 10 ... Mixing water pipe, 11 ... Controller, 12a to 12f ... Hot water temperature sensor, 13 ... Water temperature sensor, 14 ... Input button, 15
... LCD.

Claims (1)

[Claims] 1. The water in a hot water storage tank (1) supplied from the bottom is heated to a predetermined boiling temperature by a heating means (7),
In hot water storage type water heater for hot water supply is mixed with water and hot water from the top of the hot water storage tank (1), a water temperature sensor (1 for detecting the water to be above the mixing temperature (T ₀₎
3) and a plurality of hot water temperature sensors provided in the hot water storage tank (1) at predetermined intervals in the vertical direction to detect the hot water temperature (Ti) in the tank.
(12a to 12f) and input means for inputting hot water supply temperature (Tu) desired by the user
(14) and the water temperature (T ₀ ) represented by the detection signal of the water temperature sensor (13),
The hot water temperature (Ti) represented by the detection signals of the hot water temperature sensors (12a to 12f), the tank volume (Vi) corresponding to the predetermined interval, and the hot water supply temperature (Tu) input from the input means (14).
Based on the above, a hot water amount calculation means (11) for calculating a hot water supply possible hot water amount (Vu), and a hot water supply possible hot water amount (V) obtained by this hot water amount calculation means (11)
A hot water storage type hot water supply device comprising display means (15) for displaying u).