JP3144101B2 - Hot water heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION An object of the present invention is to provide a hot water heating system for reliably determining whether or not water filling in a hot water heating apparatus has been completed.

[0002]

2. Description of the Related Art Conventionally, as an example of filling water in a hot water heating apparatus, there is an example disclosed in Japanese Patent Application Laid-Open No. 3-177717. In this example, the electromagnetic valve for performing the water supply operation in the tank is opened to start filling with water in the hot water heating device, and when the predetermined time necessary for completing the initial water injection is reached, the electromagnetic valve is closed and the hot water is closed. Water filling in the heating system had been completed.

[0003]

However, in the above-mentioned conventional example, when a heating medium supply valve for supplying hot water to the heating radiator is provided, it corresponds to a case where the heating medium supply valve fails and closes. Was not done. In other words, when the heat medium supply valve is closed due to a failure, the water filling is completed even though the water filling is performed for a predetermined time, although the piping for circulating the heating circulation hot water is not reliably filled. Was misjudged.

In general, a panel radiator or the like is used as a radiator for heating. However, the panel heater is composed of a thin tube. Even if water filling is performed for a predetermined time, water filling is not reliably performed in the panel heater, and when heating operation is performed by circulating warm water with a pump and heating with a heat exchanger, air remaining in the narrow tube will There was a problem that the pump failed.

[0005] Therefore, an object of the present invention is to provide a hot water heating system that more reliably determines whether or not water is filled in the hot water heating apparatus.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a circulating path composed of a feed pipe and a return pipe, the feed pipe originating from a tank storing hot water, and an end of the feed pipe. Is connected to a heating terminal, a pump for circulating hot water from the upstream side to the going pipe, a heat exchanger for heating hot water,
It has a temperature sensor that detects the temperature of hot water heated by the heat exchanger, and a heating medium supply valve that supplies hot water to the heating terminal.The return pipe starts at the heating terminal, and the end of the return pipe is connected to the tank. A hot water heating system having a water supply means which is connected and starts at the beginning of the bypass from the downstream side of the heat exchanger in the outgoing pipe, and the end of the bypass is connected to the return pipe, and the tank is provided with water supply means for supplying water from city water. In the system, the pump is turned on while filling the inside of the tank with the water supply means, filling the inside of the hot water heating device, and the temperature sensor when the heat medium supply valve is closed after stopping the heat exchanger heating based on the detection value of the temperature sensor. Estimate the temperature decrease rate detected by the, after estimating the temperature decrease rate, heat the heat exchanger for a certain period of time, and stop the heating of the heat exchanger and open the heat medium supply valve and then the temperature sensor detection value Serial and that water filling to the hot-water heating device is provided with a judging device for judging whether or not completed the first feature by the temperature decrease rate.

Further, a first circulation path composed of a first going pipe and a first return pipe, and the first going pipe originates from a tank for storing hot water, and an end of the first going pipe is a first heating terminal. A pump for circulating hot water from an upstream side in a first going pipe, a heat exchanger for heating hot water, a temperature sensor for detecting a temperature of hot water heated by the heat exchanger, and a first heating terminal A first heat medium supply valve for supplying hot water to the machine,
The first return pipe originates from the first heating terminal, the end of the first return pipe is connected to the tank, the first return pipe originates from the heat exchanger downstream of the heat exchanger, and the end of the bypass path ends. The tank is provided with a water supply means connected to the first return pipe, for supplying water from city water, and branches off from the upstream end of the heat exchanger in the first outgoing pipe at the start end of the second outgoing pipe to form a second outgoing pipe. Is connected to a second heating terminal, the second outgoing pipe is provided with a second heat medium supply valve for supplying hot water to the second heating terminal, and the second heating terminal is provided with a start end of a second return pipe. Is connected,
At the end of the second return pipe, in the hot water heating apparatus connected to the first return pipe, the pump is turned on while filling the tank with the water supply means and the pump is turned on to fill the inside of the hot water heating apparatus, and heat is detected based on the detection value of the temperature sensor. Estimate the temperature decrease rate detected by the temperature sensor when the heat medium supply valve is closed after stopping the heat exchanger, and after estimating the temperature decrease rate, heat the heat exchanger for a certain period of time and after stopping the heat exchanger, A second feature is that a determination unit that determines whether or not water filling into the hot water heating device has been completed based on the detection value of the temperature sensor after opening the heat medium supply valve and the temperature decrease rate is provided. I have.

[0008]

According to the present invention, the pump is turned on while the water is filled in the tank without heating the heat exchanger, the pump is turned on, the hot water temperature is detected by the temperature sensor, and the ambient temperature in the hot water heating device can be estimated based on the detected hot water temperature. Therefore, it is possible to estimate the temperature decrease rate detected after the heat exchanger heating is stopped, and to reliably determine whether or not the water filling in the hot water heating apparatus has been completed based on the estimated temperature decrease rate and the actually detected hot water temperature. Can be determined.

[0009]

FIG. 1 is a diagram showing the configuration of a hot water heating apparatus according to the present invention. Reference numeral 1 denotes a hot water heating device, which has an outgoing pipe 2 and a return pipe 3 for circulating heating circulating hot water.
The outgoing pipe 2 starts from a tank 4 for storing hot water, and has a return temperature sensor 5 for detecting a return hot water temperature, a pump 6 for circulating hot water, a heat exchanger 7 for heating hot water, and a heat exchanger 7. A high temperature sensor 8 for detecting the temperature of the heated hot water, and a heat medium supply valve 9 that is opened to supply hot water to the heating terminal 10 are arranged in the going pipe 2. Is connected to the heating terminal 10.

The heating terminal 10 is composed of a radiator composed of a thin tube such as a panel heater, to which a starting end of the return pipe 3 is connected, and an end of the return pipe 3 is connected to a tank 4.
It is connected to the.

The tank 4 has a water supply means 11 for supplying city water into the tank 4, a low water level detecting means 12 for detecting a predetermined low water level or higher in the tank 4, and a predetermined medium higher than the low water level. It has a middle water level detecting means 13 for detecting a water level or higher, a high water level detecting means 14 for detecting a predetermined high water level higher than the middle water level, and an overflow port 15 for discharging hot water out of the tank 4. .

The above-mentioned heat exchanger 7 is heated by the burner 16 and the amount of gas to the burner 16 opens the on-off valve 17,
The required gas amount is obtained by varying the opening of the proportional valve 18.

Reference numeral 19 denotes a bypass which has a starting end downstream of the heat exchanger 7 in the going pipe 2.
Is connected to the return pipe 3.

Reference numeral 20 denotes a controller for controlling a controlled device such as the above-described proportional valve. The controller 20 includes a timer 21 having a timekeeping function, a storage unit 22 for storing a detected temperature value and the like, and whether or not the water filling is completed. A determination unit 23 for determining whether or not the calculation is performed and a calculation unit 24 for performing a numerical calculation are provided.

Numeral 25 denotes a remote controller connected to the controller 20, which can be filled with water by turning on a test run switch 26. Reference numeral 27 denotes a display unit for displaying the operating status of the hot water heating apparatus 1, a failure location, and the like.

FIG. 2 is a sequence diagram showing the contents of the control of the present invention. The test run switch 26 is turned on (S1),
The water supply means 11 is opened, the pump 6 is turned on, and the tank 4 is turned on.
Then, water is filled in the pipe (S2). In step 3, the detection value of the high temperature sensor 8 is stored in the storage unit 22. In the embodiment of the present invention, the heat medium supply valve 9 is opened after step 10, but the control before step 10 closes the heat medium supply valve.

In step 4, the burner 16 is caused to burn, and it is determined whether or not the time t after the start of the burner 16 combustion has reached a predetermined time t0 or more (S5). In step 6, it is determined whether the detected value TH1 of the high temperature sensor 8 is equal to or higher than the set temperature Ta of the heating terminal 10, and in step 7, it is determined whether the detected value TH2 of the return temperature sensor 5 is equal to or higher than the set temperature Ta. I do. The predetermined time t0 is a time required to obtain hot water of the heating terminal 10 at the set temperature Ta.

In a series of steps 5, 6, and 7, the detected value T of the high temperature sensor 8
If H1 or the detection value TH2 of the return temperature sensor 5 does not exceed the set temperature Ta, it is considered that the combustion system such as the burner 16 has an abnormality, the operation of the hot water heating apparatus 1 is stopped, and the display unit 27 displays the combustion system. Display an error (S1
8).

In a series of steps 5, 6, and 7, the detected value T of the high temperature sensor 8
When H1 and the detection value TH2 of the return temperature sensor 5 become equal to or higher than the set temperature Ta, the on-off valve 17 is closed and the burner 1
The combustion of No. 6 is stopped (S8).

In step 9, the detected value T0 of the high temperature sensor 8 when the burner 16 stops burning is stored in the storage unit 22, and the heat medium supply valve 9 is opened (S10). That is, in a series of sequences up to the opening of the heat medium supply valve 9 in step 10, the heating circulating hot water is forcibly circulated in the hatched path in FIG.
By opening the heat medium supply valve 9 at 0, FIG.
The heating circulation hot water is forcibly circulated also in the piping route not shaded in the above.

FIG. 3 shows the detected value TH1 of the high temperature sensor 8 and the burner 1 after the combustion of the burner 16 is stopped in step 8.
FIG. 6 is a diagram showing a relationship with time T after stopping combustion. That is, in step 8, if the burner 16 stops burning, the operation of the pump is continued, and the heat medium supply valve 9 is closed, the heating circulating hot water is forcedly circulated in a hatched portion in FIG. The temperature decrease rate of the detected temperature detected at 8 is constant and can be represented as a straight line X or a straight line Y in FIG. In short, if the ambient temperature in the hot water heating device 1 is high, the above-mentioned temperature decrease rate is small,
It is expressed as a straight line X, but if the ambient temperature is low, the above-mentioned temperature decrease rate is large, and it is expressed as a straight line Y. The applicant of the present invention has confirmed by experiment and the above-mentioned temperature decrease rate is estimated by the ambient temperature. You can. Note that the ambient temperature in the hot water heating device 1 can be estimated from the detection value of the high temperature sensor 8 before the burner 16 is burned.

FIG. 4 shows the detected value TH1 of the high temperature sensor 8.
FIG. 5 is a diagram showing a relationship between the time T and the time T after the burner 16 stops burning. In step 3, the detection value of the high temperature sensor 8 when the burner 16 is not burning is stored in the storage unit 22.
After the combustion is stopped, the temperature decrease rate when the heating circulating hot water is circulated along the hatched path in FIG. That is, on the straight line Z, the detection value of the high temperature sensor 8 when the burner 16 stops burning is T0, the detection value of the high temperature sensor 8 after the lapse of time t1 is (T0-T1), and the detection value after the lapse of time t2. The detection value of the temperature sensor 8 is (T0−T2), and the detection value of the high temperature sensor 8 after the lapse of time t3 is (T0−T2).
0 -T3). However, the magnitude relation of the above symbols is t1
<T2 <t3 and T1 <T2 <T3.

A straight line W in FIG. 4 shows the relationship between the detection value of the high temperature sensor 8 and time when the heat medium supply valve 9 is opened while the pump 6 is operated after the burner 16 stops burning. In addition, the rate of temperature decrease is larger than the straight line Z when the heat medium supply valve 9 is closed. This is because the heating circulating hot water radiated by the heating terminal 10 is mixed with the high-temperature circulating water passing through the bypass 19 at the end of the bypass 19. FIG. 3 and FIG. 4 utilize these facts in a sequence diagram after step 11.

In step 11, it is determined whether or not the time T after the burner 16 has stopped burning has exceeded a predetermined time t1, and in step 12, whether the detected value TH1 of the high temperature sensor 8 has become lower than the temperature (T0-T1). It is determined whether or not the heating circulating water is completely filled if the temperature is lower than the temperature (T0-T1) within a predetermined time t1, and the water supply means 11 is determined.
Is closed, and the pump 6 is turned off to end the water filling (S13).

If the temperature does not become lower than the temperature (T0-T1) within the predetermined time t1, the routine proceeds to step 14, where the burner 16
It is determined whether or not the time T after the combustion is stopped has exceeded a predetermined time t2.
It is determined whether or not H1 is lower than the temperature (T0-T2), and if the temperature is lower than the temperature (T0-T2) within a predetermined time t2, the water filling is terminated (S13).

If the temperature does not become lower than the temperature (T0-T2) within the predetermined time t2, the process proceeds to step 16, where the burner 16
It is determined whether or not the time T after the combustion has stopped has exceeded a predetermined time t3.
It is determined whether or not H1 is lower than the temperature (T0-T3), and if the temperature is lower than the temperature (T0-T3) within a predetermined time t3, the water filling is terminated (S13).

If the temperature does not become lower than (T0-T3) within a predetermined time t3, the heating medium supply valve 9 will not be opened due to a failure, or the thin tube constituting the heating terminal 10 will be clogged, or other circulation will occur. Assuming that a system abnormality has occurred, the operation of the hot water heating apparatus 1 is stopped, and the display unit 27 displays a circulating system abnormality (S18).

In the embodiment of FIG. 2, it is determined in step 12 whether the temperature is lower than the temperature (T0-T1).
The determination may be made based on whether the temperature is less than 0− (T1 + α)｝. Similarly, in step 15, the determination may be made based on whether the temperature is less than {T0− (T2 + β)} in consideration of the heat radiation action of the heating terminal 10. Alternatively, in step 17 as well, the determination may be made based on whether the temperature is lower than {T0− (T3 + γ)} in consideration of the heat radiation action of the heating terminal 10.

FIG. 5 shows another embodiment of the configuration of the hot water heating apparatus in FIG. 1, and reference numerals 1 to 27 in the figure are common to FIG. The first outgoing pipe 2 has a starting point of the second outgoing pipe 28 on the upstream side of the heat exchanger 7, the second outgoing pipe is provided with a second heat medium supply valve 29, and the second outgoing pipe 2
The end of 8 is connected to the second heating terminal 30. Second
The starting end of the second return pipe 31 is connected to the heating terminal 30,
The end of the second return pipe 31 is connected to the first return pipe 3.

It should be noted that the hot water heating apparatus shown in FIG. 5 can also perform control according to the sequence shown in FIG.

[0031]

According to the present invention, the pump is turned on without heating the heat exchanger, water is filled in the hot water heating apparatus, the temperature of the hot water is detected by the temperature sensor, and the ambient temperature in the hot water heating apparatus is determined based on the detected hot water temperature. It is possible to estimate the temperature decrease rate detected by the temperature sensor when the heat medium supply valve is in the closed state after heating the heat exchanger for a certain time, and the estimated temperature decrease rate and the actual temperature decrease rate can be estimated. Therefore, it is possible to reliably detect poor water filling in the hot water heating apparatus due to, for example, the heat medium supply valve being closed due to a failure.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a hot water heating device of the present invention.

FIG. 2 is a sequence diagram showing the contents of control according to the present invention.

FIG. 3 is a diagram showing a relationship between a detection value of a high temperature sensor 8 and a time T.

FIG. 4 is a diagram showing a relationship between a detection value of a high temperature sensor 8 and a time T.

FIG. 5 is a diagram showing another configuration of the hot water heating device of the present invention.

[Description of Signs] 1 Hot water heating device 2 Outgoing pipe (first going pipe) 3 Return pipe (first returning pipe) 4 Tank 6 Pump 7 Heat exchanger 8 High temperature sensor 9 Heat medium supply valve (First heat medium supply Valve) 10 heating terminal (first heating terminal) 11 water supply means 19 bypass path 23 determination means 28 second going pipe 29 second heat medium supply valve 30 second heating terminal 31 second return pipe

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24D 3/10 F24D 3/00

Claims (2)

(57) [Claims] A circulation path comprising an outgoing pipe and a return pipe;
The going pipe originates from a tank storing hot water, the end of the going pipe is connected to a heating terminal, and the going pipe has a pump for circulating hot water from an upstream side, a heat exchanger for heating hot water, and a heat exchanger. Equipped with a temperature sensor that detects the temperature of the hot water heated by the exchanger, and a heating medium supply valve that supplies hot water to the heating terminal.The return pipe starts at the heating terminal, and the end of the return pipe connects to the tank. A hot water heating apparatus having a starting point of a bypass from a downstream side of the heat exchanger in the going pipe, an end of the bypass being connected to a return pipe, and a water supply means for supplying water from city water to the tank. , The pump is turned on while filling the tank with water by water supply means
After filling the inside of the hot water heating device, the temperature sensor detects the temperature decrease rate detected by the temperature sensor when the heat medium supply valve is closed after the heat exchanger stops heating, and then estimates the temperature decrease rate. Heats the heat exchanger for a certain time,
A determination means is provided for determining whether or not water filling in the hot water heating apparatus has been completed based on the detection value of the temperature sensor and the temperature decrease rate after the heat medium supply valve has been opened after the heat exchanger has stopped heating. A hot water heating system characterized by that: 2. A first circulation path comprising a first going pipe and a first return pipe, the first going pipe originating from a tank for storing hot water, and the end of the first going pipe is a first heating terminal. A pump for circulating hot water from an upstream side in a first going pipe, a heat exchanger for heating hot water, a temperature sensor for detecting a temperature of hot water heated by the heat exchanger, and a first heating terminal A first heat medium supply valve for supplying hot water to the machine;
The return pipe originates from the first heating terminal, the end of the first return pipe is connected to the tank, the first return pipe originates from the downstream side of the heat exchanger in the heat exchanger, and the end of the bypass path is the first end. The tank is provided with a water supply means connected to the return pipe, for supplying water from city water. The start end of the second flow pipe is branched from the upstream side of the heat exchanger in the first flow pipe, and the end of the second flow pipe is provided. Is connected to the second heating terminal, and the second
A second heat medium supply valve for supplying hot water to the heating terminal;
The starting end of the second return pipe is connected to the second heating terminal,
At the end of the return pipe, in the hot water heating apparatus connected to the first return pipe, the pump is turned on while filling the tank with the water supply means and the pump is turned on to fill the hot water heating apparatus, and the heat exchanger is detected based on the detected value of the temperature sensor. Estimate the temperature decrease rate detected by the temperature sensor when the heat medium supply valve is closed after stopping the heating.After estimating the temperature decrease rate, heat the heat exchanger for a certain period of time. A hot-water heating system comprising: a determination unit configured to determine whether or not water filling in the hot-water heating apparatus has been completed based on a detection value of a temperature sensor after the supply valve is opened and the temperature decrease rate.