JPH07190389A - Hot water heating device - Google Patents

Abstract

PURPOSE:To prevent a heating service from becoming impossible resultant from wrong determination about hot water leakage by measuring a specified time required for the supply of water to a hot water tank and excluding that case from hot water leakage determination if a real supply time is shorter than the specified supply time. CONSTITUTION:A water supply timer 23a is used to measure preliminarily a specified supply time, which is required to supply water to a hot water tank installed to a circulation line which circulates heating hot water or more specifically, to measure a specified time which is required to raise a hot water level from a middle water level to a high water level. A time determination means 24 compares the specified time measured with the water supply timer 23a with a real supply time by a water supply time. If the real supply time is shorter than the measured time, the case is excluded from hot water leakage determination with a count clear means 26. This construction makes it possible to prevent heating service from unavailable due to wrong hot water leakage determination resultant from water supply after the recovery or power failure after a spontaneous voltage drop caused by a power failure or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating device, and more particularly to an improvement of a hot water heating device having a hot water leak judging function for judging a water leak from a hot water tank or the like.

[0002]

2. Description of the Related Art Conventionally, a water level detector consisting of a plurality of electrodes is provided in an expansion tank, and each electrode of the water level detector is sequentially energized, and the water level height in the expansion tank is judged by the presence or absence of conduction between the electrodes. Then, as a result, if the water level is low, the water injection valve is opened, and if the water level is high, the water injection valve is closed to automatically inject water into the expansion tank (for example, JP-A 1-312332).
issue).

On the other hand, as a safety measure against water leakage from the hot water heating system, the number of times water is replenished to the expansion tank within a certain period is counted. It was judged and the operation of the hot water heating system itself was stopped.

[0004]

However, when the electrodes in the expansion tank are sequentially energized to determine the level of the water level in the tank, if a momentary voltage drop such as a power failure occurs, the interelectrode electrodes After the power failure is restored, the water injection valve opens and water is replenished, and if this state is repeated a certain number of times, it is determined that water leakage has occurred and the operation of the hot water heating device itself is stopped. This causes the inconvenience that the user cannot use the heating.

Therefore, the present invention is to eliminate the above inconvenience.

[0006]

According to the present invention, a hot water tank provided in a circulation path for circulating hot water for heating, a plurality of water level detecting means provided in the hot water tank, and water supply to the hot water tank are performed. A water supply means and a hot water leak determination means for determining water leak from a hot water tank or the like,
The predetermined time required to supply water to the hot water tank is measured in advance, and when the actual replenishment time is shorter than the predetermined time as compared with the actual replenishment time by the water supply means, it is excluded from the hot water leak determination. The first feature is that the hot water leakage determination excluding means is provided.

Further, a circulation path through which hot water for heating circulates, a load for heating and a hot water tank for storing hot water for heating are provided in the circulation path, and a low water level detection means and a medium water level detection are provided in the hot water tank. Means and a high water level detection means, the water level in the hot water tank is detected by the low water level detection means, the medium water level detection means and the high water level detection means at regular intervals, and the introduction path connected to the hot water tank A water supply means is provided, which opens when the water level in the hot water tank decreases to less than the medium water level and opens while the water level in the hot water tank rises and becomes higher than or equal to the high water level.
A timer measures the time from the opening of the water supply means to the closing of the water supply means, and this time is the predetermined time required to change the water level in the warm water tank from the medium water level to the high water level (predetermined time = above the medium water level and below the high water level). Of the amount of water in the tank / the amount of water supply per unit time of the water supply means), a time determination means for determining whether the time measured by the timer is the predetermined time or more, and a time measured by the timer. Count clear means that does not count the number of counts when the time is less than the predetermined time, and that the time measured by the timer is equal to or longer than the predetermined time twice or more consecutively or in total 2
A second feature is that a hot water leak determination means is provided for determining that the warning or abnormality is detected when detected more than once.

Further, a circulation path through which hot water for heating circulates, a load for heating and a hot water tank for storing hot water for heating are provided in the circulation path, and a low water level detection means and a medium water level detection are provided in the hot water tank. Means and a high water level detection means, the water level in the hot water tank is detected by the low water level detection means, the medium water level detection means and the high water level detection means at regular intervals, and the introduction path connected to the hot water tank A water supply means is provided, which opens when the water level in the hot water tank decreases to less than the medium water level and opens while the water level in the hot water tank rises and becomes higher than or equal to the high water level.
A timer measures the time from the opening of the water supply means to the closing of the water supply means, and this time is the predetermined time required to change the water level in the warm water tank from the medium water level to the high water level (predetermined time = above the medium water level and below the high water level). (Amount of water in tank / water supply amount per unit time of water supply means), time determination means, flag raising means that raises a flag when the time measured by the timer is the predetermined time or more, and measurement by the timer If the time is less than the predetermined time, the flag is turned off.
A third feature is that the FF means and the hot water leak determination that determines that the caution or abnormality is detected when the time measured by the timer is longer than the predetermined time is provided.

Further, as a fourth characteristic, a control means is provided for closing the water supply means when the hot water leak judging means detects the hot water leak and for displaying the hot water leak on the display part of the remote controller for operating the appliance. There is.

[0010]

In the present invention, when the actual replenishment time by the water supply means is shorter than the predetermined time required to replenish water to the hot water tank measured in advance, the hot water leak determination excluding means is excluded from the hot water leakage determination. As a result, even if water is replenished due to power failure recovery after a momentary voltage drop such as a power failure, it will be excluded from the hot water leak determination in the case of such a momentary power failure. It is not determined that the hot water heating apparatus itself has stopped, although the hot water heating apparatus itself does not operate even though there is no hot water leakage.

Further, even if the count clearing means or the flag OFF means is used as the hot water leakage determination excluding means, the above-mentioned drawbacks can be surely solved.

Further, according to the present invention, when a hot water leak in the hot water tank is detected, the hot water leak is displayed on the display section of the remote controller for operating the appliance, so that even if the hot water leak in the hot water tank occurs, the user can be sure. Since it is possible to know the hot water leak of the hot water tank, the convenience for the user is improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a device configuration of a hot water heating system. The hot water circulation system 1 is provided in the hot water heater A, and 2
Is a hot water tank provided in the middle of the hot water circulation path 1.

Inside the warm water tank 2, a low water level detecting means 3 such as an electrode rod which is turned on when a predetermined low water level or higher in the tank is turned on, and a low water level detection means 3 which is turned on at a predetermined medium water level or higher in the tank is turned on.
There is provided a medium water level detecting means 4 such as an electrode rod, and a high water level detecting means 5 such as an electrode rod which is conductive and turns on at a predetermined high water level or higher in the tank.

Reference numeral 6 denotes an overflow tank capable of discharging water to the outside of the hot water tank 2, and reference numeral 7 denotes an introduction passage for introducing hot water into the hot water tank 2. A water supply means 8 such as a flow rate type valve is provided.

Reference numeral 9 is a circulation pump, and 10 is a burner 11.
Is a heat exchanger heated by. The amount of gas to the burner 11 is obtained by opening the original solenoid valve 12 and varying the opening of the proportional valve 13.

Reference numeral 14 is a heating load such as a fan convector or a floor heating panel. Reference numeral 15 denotes a remote controller, which is provided with a heating operation switch 16, a test operation switch 17 for filling water in the circulation path 1 and the hot water tank 2, and a display section 18 for displaying an operating state, a failure point, and the like.

FIG. 2 is a control block diagram of the controller 20, FIG. 3 is a control sequence diagram, and FIG. 4 is a time chart diagram of water level determination by the water level detecting means.

First, the monitoring timer 23b provided in the timer 23 starts measurement (S1). Watch timer 2
3b is composed of a timer for a long time A of, for example, about 64 hours, and hot water leakage occurs when the water replenishing operation for a predetermined time B or more described later is continuously performed twice or more during the long time A. Determine that

In step 2, it is judged whether or not the medium water level detecting means 4 is turned on.

Here, the determination as to whether the water level detecting means for low water level, medium water level or high water level is conducted and turned on is to transmit an electric signal from the water level sensor input / output means 21 to each water level detecting means, As a result, if the water level detecting means ON signal is output from the water level detecting means to the water level sensor input / output means 21, the water level detecting means is in a conducting state.

If the medium water level detecting means 4 is not turned on in step 2, the water supply means 8 is opened, and at the same time, the water replenishment timer 23a starts the measurement, and the pump control section 30 turns on the circulation pump 9 (S6). In step 7, it is judged whether or not the high water level detecting means 5 is ON.
If the high water level detection means 5 is turned on in step 7, the water supply means 8 is closed, the measurement by the replenishment timer 23a is terminated, and the circulation pump 9 is turned off (S8).

In step 9, the time determination means 24 determines whether the replenishment time TB measured by the replenishment timer 23a is the predetermined time B or longer. Here, the predetermined time B is a time (t0 + α) longer than the fixed time t0 shown in the time chart of FIG. 4 (for example, the fixed time t0 is a short time of about 2 to 3 seconds).

In other words, the low water level detection time 3, the medium water level detection means 4, and the high water level detection means 5 are transferred from the water level sensor input / output means 21 to the respective water level detection means at the constant time t0 every fixed time t0 cycle. The electrical signals are sequentially transmitted in a shorter time Δt (for example, a minute time of about 0.2 seconds), and the water level detecting means ON signal that is transmitted when the respective water level detecting means conducts is input to the water level sensor input / output. The water level determination means 22 determines whether or not it is outputting to the means 21.

The predetermined time B (B = t0 + α) is
For example, the shortest time TS (T) that is longer than the predetermined time t0 and that is required to change the water level in the warm water tank from the medium water level to the high water level
S = the amount of water in the tank equal to or higher than the medium water level and equal to or lower than the high water level / the flow rate of water supplied per unit time by the water supply means) or less than the shortest time TS.

In step 9, the replenishment time TB is the predetermined time B
If (B = t0 + α) or more, one count number is added to the counting means 25 (S11). In step 12, the hot water leak determination means determines whether the total count number of the counting means 25 is 2 or more, that is, whether or not the sequence surrounded by the dotted line in the sequence diagram of FIG. 3 is repeated twice or more continuously. 27.

If the total count number is not 2 or more in step 12, the process proceeds to step 2 again, and the total count number is 2.
If it is above, that is, the replenishment time tB is the predetermined time B (B =
When the water replenishing operation of t0 + α) or more is continuously performed twice or more, the water supply valve opening / closing means 28 closes the water supply means 8 and the display means 31 displays a warning or an alarm warning of a hot water tank leak on the display unit 18. A safe operation is performed (S13).

Here, the safe operation in step 13 is to close the water supply means 8 and to cause the display section 18 to display a warning or an alarm of an abnormality due to the leakage of the hot water tank. If the heating operation switch 16 is ON, the low water level is displayed. Detection means 3 is ON
Heating operation is continued for as long as. Therefore, the heating operation can be continued until the low water level detection means is turned off. Further, during the safe operation, an alarm operation may be performed by a buzzer or the like.

If the replenishment time tB is not equal to or longer than the predetermined time B (B = t0 + α) in the above step 9, the count clear means 26 (corresponding to the hot water leakage determination excluding means in claim 1) is used to change the total count number of the counting means 25. It is set to 0 (S10), and the process proceeds to step 2 again.

In step 2, the medium water level detecting means 4 is set to 0N.
If so, the count clearing means 26 sets the total count number of the counting means 25 to 0 (S3).

In step 4, it is determined whether or not the time Ta from the start of measurement by the monitoring timer 23b is longer than the time A described above. If it is less than time A, the process proceeds to step 2 and the time A If the above is the case, the measurement of the monitoring timer 23b is terminated (S5), and the process proceeds to step 1.

As another embodiment of the present invention, step 3
Also, the configuration may be such that step 10 is not provided. In this case, if the total number of counts is 2 or more, it is determined that there is a hot water leak.

The block diagram of FIG. 5 and the sequence diagram of FIG. 6 correspond to the contents of claim 3, and instead of the counting means 25 in FIG. 2, a flag raising means 35 is provided, and a count clearing means 26 as a hot water leakage determination excluding means. Instead of the above, a flag OFF means 36 (corresponding to the hot water leak determination excluding means in claim 1) is provided, and a flag ON / 0FF determination means 37 for determining whether or not the flag is ON is provided.

In FIG. 6, step 1, step 2, step 4 to step 9 and step 13 are the same as those in FIG. 3 and their explanations are omitted. In step 23 corresponding to step 3 of FIG. 3, the flag is turned off by the flag off means 36. Replenishment time T in step 9
Is not equal to or greater than the predetermined time B, the flag is turned off (S3
0), go to step 2 again.

If the water replenishment time T is equal to or longer than the predetermined time B in step 9, it is judged by the flag ON / 0FF judgment means 37 whether the flag is ON (S31). 13 safety actions,
If the flag is not ON, the flag raising means 35 turns the flag ON (S33), and the process proceeds to step 2.

[0036]

According to the present invention, even if the water replenishing operation is performed by the water supply means after the power failure is restored due to the momentary voltage drop such as the power failure, it is possible to prevent the hot water leakage from being erroneously determined. It is possible to solve the conventional inconvenience that the user cannot use the heating even though there is no hot water leak.

Further, when hot water leaks from the hot water tank, the user can be sure of the hot water tank by displaying the hot water leak on the display section of the remote controller that closes the water supply means and operates the appliance. It is possible to know the hot water leak, and thus the convenience and comfort of the user are improved.

[Brief description of drawings]

FIG. 1 is a device configuration diagram of a hot water heating device.

FIG. 2 is a control block diagram of the present invention.

FIG. 3 is a sequence diagram showing the content of control of the present invention.

FIG. 4 is a time chart diagram of water level determination by water level detection means.

FIG. 5 is a control block diagram of another embodiment of the present invention.

FIG. 6 is a sequence diagram showing the control contents of another embodiment of the present invention.

[Explanation of symbols]

 A hot water heating device 1 circulation path 2 hot water tank 3 low water level detection means 4 medium water level detection means 5 high water level detection means 7 introduction path 8 water supply means 14 load 23 timer 23a replenishment timer 24 hour determination means 25 counting means 26 count clearing means ( Hot water leak judgment excluding means) 27 Hot water tank leak judging means 35 Flag raising means 36 Flag OFF means (hot water leak judging excluding means)

Claims (4)

[Claims] 1. A hot water tank provided in a circulation path for circulating hot water for heating, a plurality of water level detection means provided in the hot water tank, a water supply means for supplying water to the hot water tank, a hot water tank and the like. It has a hot water leak judging means for judging a water leak, and measures a predetermined time necessary for supplying water to the hot water tank in advance, and compares it with the actual supply time by the water supplying means to determine the actual time. A hot water heating apparatus comprising a hot water leak determination excluding means for excluding from the hot water leak determination when the replenishment time is shorter than the predetermined time. 2. A circulation path through which hot water for heating circulates, a load for heating and a hot water tank for storing hot water for heating are provided in the circulation path, and a low water level detection means and a medium water level detection are provided in the hot water tank. Means and a high water level detection means, the water level in the hot water tank is detected by the low water level detection means, the medium water level detection means and the high water level detection means at regular intervals, and the introduction path connected to the hot water tank The water level in the hot water tank decreases and opens below the medium water level, and the water level in the hot water tank rises to a level above the high water level. A timer measures the time until it becomes a predetermined time, and the time required to change the water level in the warm water tank from the medium water level to the high water level (predetermined time = water amount in the tank above the medium water level and below the high water level / unit time of the water supply means) Per water supply amount) A time determining means for making a determination, a counting means for detecting the number of times the time measured by the timer is equal to or longer than the predetermined time, and a count clear means for not counting the number of counts in the counting means if the time measured by the timer is shorter than the predetermined time The hot water heating device is provided with a hot water leak determination means for determining that the time measured by the timer is equal to or longer than the predetermined time, which is a caution or an abnormality when it is detected twice or more continuously or twice or more in total. 3. A circulation path through which hot water for heating circulates, a load for heating and a hot water tank for storing hot water for heating are provided in the circulation path, and a low water level detection means and a medium water level detection are provided in the hot water tank. Means and a high water level detection means, the water level in the hot water tank is detected by the low water level detection means, the medium water level detection means and the high water level detection means at regular intervals, and the introduction path connected to the hot water tank The water level in the hot water tank decreases and opens below the medium water level, and the water level in the hot water tank rises to a level above the high water level. A timer measures the time until it becomes a predetermined time, and the time required to change the water level in the warm water tank from the medium water level to the high water level (predetermined time = water amount in the tank above the medium water level and below the high water level / unit time of the water supply means) Per water supply amount) A time determination means for determining, a flag raising means for raising a flag if the time measured by the timer is equal to or longer than the predetermined time, and a flag OFF for turning off the flag if the time measured by the timer is less than the predetermined time.
A hot water heating device comprising means and hot water leak determination that determines a caution or an abnormality when it detects that the time measured by a timer is equal to or longer than the predetermined time. 4. The control means for closing the water supply means and detecting the hot water leak by the hot water leak determination means, and for providing a hot water leak display on the display part of the remote controller for operating the appliance. The hot water heating device according to the second or third range.