JP3339108B2 - Hot water heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control for filling a circulation path of a hot water heating system with water.

[0002]

2. Description of the Related Art Conventionally, as an example in which a circulation path of a hot water heater is filled with water, the present applicant has filed Japanese Patent Application No. 4-28.
No. 6911 was previously filed. In this example, the pump is operated to open the water supply valve to perform a water injection operation into the tank, and when a predetermined high water level is detected, the water supply valve is closed, and the water level in the tank is lower than the predetermined high water level. If the middle water level was continued for a predetermined time after closing the water supply valve, it was considered that the filling of the circulation path had been completed.

[0003]

However, in the above conventional example, the pump is operated while the water is being injected into the tank, so that the water level in the tank constantly fluctuates during the water injection operation. I have. Therefore, even if the high water level is detected once and the middle water level or more is continued for a predetermined time, it is difficult to say that the water filling of the circulation path has been reliably performed, and the determination of whether the water filling of the circulation path has been completed lacks accuracy. Was what it was.

Accordingly, an object of the present invention is to provide a hot water heating system that can more accurately determine whether or not the filling of the circulation path has been completed.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a circuit for circulating hot water for heating, a tank for storing hot water in the circuit, a pump, and a heater. A low-water-level detecting means that is turned on at a predetermined low water level or higher, and a medium-water level that is turned on at a predetermined middle water level higher than the low water level. detection means, is water supply passage is connected with a water supply means with and a high water level detecting means becomes ON at a high level a predetermined height level or higher than the intermediate level, fed-waterway for hot water with a water amount detecting means A hot-water heater with a water heater connected to a main waterway, in which the water supply means is opened to fill the circulation path, and from when the medium water level detection means is turned on to when the high water level detection means is turned on. the integrated flow rate is detected by the water amount detecting means Is the first feature in that a determining means for determining whether water filling the circulation path is completed by comparing the following predetermined difference water level or high level in the tank.

A circulation path for circulating hot water for heating, a tank for storing hot water in the circulation path, a pump,
The tank includes a heat exchanger heated by a burner, and a heating radiator. The tank is provided with a low water level detecting means that is turned on at a predetermined low water level or higher, and an O is provided at a predetermined medium water level higher than the low water level.
An intermediate water level detecting means which is N, a high water level detecting means which is turned on at a predetermined high water level higher than the intermediate water level, and a water supply path having a water supply means is connected, and the water supply path is provided with a water amount detecting means; A hot water heater with a water heater connected to a main water channel for hot water supply, wherein the water supply means is opened to fill the circulation path, and the high water level detection means is turned on after the middle water level detection means is turned on. Comparison of the integrated flow rate detected by the water amount detection means up to the time when the specified water amount is obtained by adding a fixed amount of water to the predetermined difference amount of water in the tank from the middle water level to the high water level
And a second feature that the water filling of the circulation path is provided with determining means whether or not it is completed by.

Further, a circulation path for circulating hot water for heating, a tank for storing hot water in the circulation path, a pump,
The tank includes a heat exchanger heated by a burner, and a heating radiator. The tank is provided with a low water level detecting means that is turned on at a predetermined low water level or higher, and an O is provided at a predetermined medium water level higher than the low water level.
An intermediate water level detecting means which is N, a high water level detecting means which is turned on at a predetermined high water level higher than the intermediate water level, and a water supply path having a water supply means is connected, and the water supply path is provided with a water amount detecting means; A hot water heater with a water heater connected to a main water channel for hot water supply, having a water supply unit opened to fill the circulation path, and a predetermined fixed amount is set after the middle water level detection unit is turned on. The water level detecting means is closed for a predetermined time determined according to the integrated flow rate detected by the water amount detecting means from when the water supply means is opened to when the water supply means is closed after the water supply means is closed. The third means is that a judgment means for judging that the water filling of the circulation path has been completed when the ON is continued is provided.
The feature is.

[0008]

[Function] Integrated water volume when water is supplied from middle water level to high water level
Is higher than the volume between the medium and high water levels in the tank.
If there is a lot of water, the air in the circulation path and the water in the tank
Therefore, according to the present invention, the integrated flow rate detected by the water amount detecting means from when the middle water level detecting means is turned ON to when the high water level detecting means is turned ON, and in the tank, or medium level high level following a predetermined difference water
Whether or not the filling of the circulation path has been completed is determined by the comparison, so that the filling of the circulation path can be ensured.

[0009] Further, after the middle water level detecting means is turned on, a predetermined amount of water is supplied into the circulation path, and then the water supplying means is closed. If the middle water level detecting means continues to be ON for a predetermined time determined by the detected integrated flow rate, it is possible to reliably fill the circulation path even in a configuration in which it is determined that the filling of the circulation path has ended.

[0010]

FIG. 1 is a diagram showing a configuration of a hot water heater with a water heater according to the present invention. Reference numeral 1 denotes a hot water heater with a water heater, which is provided with a main water passage 2 for heating city tap water to supply hot water. The main water channel 2 is provided with a flow rate sensor 3 for measuring an incoming water flow rate and a hot water supply heat exchanger 4. The heating of the hot water supply heat exchanger 4 is performed by a hot water supply burner 5, and a gas amount to the hot water supply burner 5 is supplied. Obtains the required gas amount by opening the original solenoid valve 6 and varying the opening of the proportional valve 7.

A water supply branch 8 is branched from the downstream side of the flow sensor 3 in the main waterway 2, and a water supply means 9 is provided in the water supply branch 8 so as to be able to supply water into the tank 11 by being opened. I have.

Reference numeral 10 denotes a circulation path for circulating hot water for heating, which branches the branch paths 10a and 10b at a branch point A on the way, and the branch paths are joined and connected at a terminal point B. This forms a circulation path.

The circulation path 10 is provided with a tank 11 for storing heating circulating hot water, a pump 12 for supplying the heating circulating hot water, and a heating heat exchanger 13 for heating the heating circulating hot water.

The branch passage 10a is provided with a heating medium supply valve 14a capable of supplying hot water by opening the heating medium radiator 1a.
5a. The branch passage 10b is provided with a heating medium supply valve 14b that can be supplied with hot water by being opened, and a heating radiator 15b.

The above-mentioned tank 11 has an ON-OFF type low water level electrode 16 which is turned ON at a predetermined low water level or higher, and an ON-O electrode which is turned ON at a predetermined middle water level higher than the low water level.
FF type middle water level electrode 17 and ON-OFF type high water level electrode 1 which is turned ON at a predetermined high water level higher than the middle water level
8 and an overflow port 19 are provided.

The above-mentioned heating heat exchanger 13 is heated by the burner 20 and the amount of gas to the burner 20 is controlled by the original solenoid valve 21.
Is opened, and the required gas amount is obtained by varying the opening of the proportional valve 22.

Reference numeral 23 denotes a controller for controlling a controlled device such as a proportional valve or a pump. A timer 24 having a timekeeping function and a storage unit 2 for storing measured values, calculated values, and the like.
5, a calculation unit 26 for performing calculations such as numerical values, and a circulation path 1
And a determination unit 27 for determining whether or not the water filling in the 0 pipe has been completed.

Reference numeral 28 denotes a remote controller connected to the controller 23, reference numeral 29 denotes a trial operation switch for filling the circulation path 10 with water, reference numeral 30 denotes a heating operation switch, and reference numeral 3 denotes a heating operation switch.
Reference numeral 1 denotes a display unit that displays the operating state of the heating device, a failure location, and the like.

FIG. 2 is a sequence diagram showing the contents of the control of the present invention. Turn on the test run switch 29 (S
1) The heating medium supply valve 14a is opened (S2), and it is determined whether or not the middle water level electrode 17 is ON (S3).

If the middle water level electrode 17 is ON in step 3, the process proceeds to step 6. If the middle water level electrode 17 is not ON, the water supply means 9 is opened (S4), and the middle water level electrode 17 is turned ON.
Is determined (S5). If the middle water level electrode 17 is ON in step 5, the pump 12 is turned ON and the integrated flow rate calculation is started.

In step 7, it is determined whether or not the low water level electrode 16 is ON.
If not, the pump 12 is turned off, the integrated flow rate calculation value is reset (S13), and the process proceeds to step 4.

If the low water electrode 16 is ON in step 7, it is determined whether the high water electrode 18 is ON (S8). If the high water electrode 18 is not ON, step 6 is performed.
If the high water level electrode is ON, the water supply means 9 is closed and the calculation of the integrated flow rate is stopped (S9). Here, the calculation of the integrated flow rate is performed using the flow rate sensor 3.

In step 10, it is determined whether or not the water filling of the circulation path 10 has been completed. Here, the determination as to whether or not the water filling has been completed means that the accumulated flow rate A until the high water level electrode 18 is turned on after the middle water level electrode 17 is turned on and the tank 11
A predetermined difference water amount B between a predetermined middle water level and a predetermined high water level is compared, and if the integrated flow rate A is larger than the predetermined difference flow rate B, it is determined that the filling of the circulation path 10 has not been completed, If the integrated flow rate A is equal to or less than the predetermined difference flow rate B, it is determined that the filling of the circulation path 10 has been completed. Alternatively, the integrated flow rate A and
A configuration may be adopted in which a comparison is made with a predetermined flow rate (B + α) obtained by adding a predetermined flow rate considering the error and the like to the predetermined difference flow rate B.

If the water filling is not completed in step 10, it is determined in step 14 whether or not the middle water level electrode 17 is ON, and in step 15, it is determined whether or not the high water level electrode 18 is ON. If the high water level electrode 18 is ON in step 15, the process proceeds to step 11.

In step 14, the middle water level electrode 17
N, and in step 15 the high water electrode 1
If 8 is not ON, the integrated flow rate calculation value is reset (S16), the water supply means 9 is opened (S17), and the process proceeds to step 6 described above.

When it is determined in step 10 that the water filling of the circulation path 10 has been completed, and when the high water level electrode 18 is ON in step 15, it is considered that the water filling of the circulation path 10 has been completed, and the heat medium supply valve 14a is closed. (S11), the completion of the filling of the branch road 10a is displayed on the display unit 31, and the process is terminated (S12).

In the embodiment shown in FIG. 2, the heat medium supply valve 14a
May be opened and closed, but after opening and closing the heat medium supply valve 14a, the heat medium supply valve 14b may be opened and closed to fill the circulation path 10 with water, or the heat medium supply valve 14a and the heat medium supply valve 14b May be simultaneously opened and closed to fill the circulation path 10 with water.

In short, in the sequence of FIG. 2, the amount of water actually injected into the circulation path 10 from the time when the middle water level electrode 17 in the tank is turned on to the time when the high water level electrode 18 is turned on is determined by the predetermined amount in the tank. By comparing the predetermined difference flow rate between the high water level and the predetermined middle water level, it is determined whether or not the water filling of the circulation path 10 has been completed.

FIG. 3 is a sequence diagram showing the contents of the control according to claim 3 of the present invention. Set the test run switch 29 to O
N (S21), the heat medium supply valve 14a is opened (S2).
2) The water supply means 9 is opened (S23). Step 24
Then, it is determined whether or not the low water level electrode 16 is turned on. If the low water level electrode 16 is turned on, the pump 12 is turned on (S
25) It is determined whether or not the middle water level electrode 17 has been turned ON (S26).

In step 26, the middle water level electrode 17
If N, it is determined whether or not the constant flow rate C (liter) has dropped into the circulation path 10 after the middle water level electrode 17 has been turned ON (S27). Here, the amount of water dropped into the circulation path 10 via the water supply means 9 and the tank 11 is measured using the detection value of the flow rate sensor 3.

When the constant flow rate C (liter) drops into the circulation path 10 after the middle water level electrode 17 is turned on, the water supply means 9 is closed (S28), and measurement by the timer 24 is started (S29). In step 30, the middle water level electrode 17 is turned on.
Is determined, and if the middle water level electrode 17 is not ON, the timer 24 is reset (S
33), and proceed to step 23 described above.

In step 30, the middle water level electrode 17
If N, it is determined whether or not the time T from the start of the timer 24 has exceeded a predetermined time T1 (S3).
1) When the middle water level electrode 17 is ON and the predetermined time T1 has elapsed, the heat medium supply valve 14a is closed, and the display 31 indicates that the filling of the branch passage 10a has been completed, and the process ends (S32).

The predetermined time T1 is determined as follows. FIG. 4 is the total flow rate Q of water supplied to the circulation path 10 from opening to closing of the water supply means 9 on the horizontal axis,
The vertical axis is the time T determined by the total feedwater total flow rate Q, and both are in a direct proportional relationship as shown in the figure, and are input to the controller 23 after the heating system designer has confirmed in advance through experiments and the like. Good.

That is, according to the magnitude of the total flow Q of the integrated water supply,
The size of the determination time T1 is made variable to ensure that the circulation path 10 is filled with water.

In the embodiment shown in FIG. 3, the heat medium supply valve 14a
May be opened and closed, but after opening and closing the heat medium supply valve 14a, the heat medium supply valve 14b may be opened and closed to fill the circulation path 10 with water, or the heat medium supply valve 14a and the heat medium supply valve 14b May be simultaneously opened and closed to fill the circulation path 10 with water.

[0036]

According to the present invention, not only the detection value by the water level detecting means but also the integrated water amount actually dropped into the circulation path after the middle water level detecting means is turned on is detected by the water amount detecting means, Since the configuration is compared with the predetermined amount of water difference in the tank or the like, it is possible to reliably detect whether or not the filling of the circulation path has been completed.

In addition, the water amount detecting means is used in combination with a water supply main water passage provided with a hot water supply heat exchanger, and it is not necessary to provide the water circulation means in a circulation circuit for heating. It can also be suppressed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a hot water heater with a water heater according to the present invention.

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

FIG. 3 is a sequence diagram showing the contents of control according to the present invention.

FIG. 4 is a diagram showing a relationship between an integrated total water supply flow rate Q and a time T.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Hot water heater with water heater 2 Main water path 3 Flow sensor 8 Water supply branch 9 Water supply means 10 Circulation path 11 Tank 12 Pump 13 Heating heat exchanger 15a Heating radiator 15b Heating radiator 16 Low water level electrode 17 Middle water level electrode 18 High Water level electrode 20 Burner 23 Controller 24 Timer 27 Judgment unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-94250 (JP, A) JP-A-6-11144 (JP, A) JP-A-3-177715 (JP, A) JP-A-4- 68227 (JP, A) JP-A-3-233231 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24D 3/10 F24D 3/00

Claims (3)

(57) [Claims] 1. A circulation path for circulating hot water for heating, a tank for storing hot water in the circulation path, a pump, a heat exchanger heated by a burner, and a heating radiator, A low water level detecting means which is turned on at a predetermined low water level or higher, a medium water level detecting means which is turned on at a predetermined middle water level higher than the low water level, and a predetermined high water level higher than the middle water level A high-water level detecting means that is turned on at the same time, a water supply path having a water supply means is connected thereto, and the water supply path is a hot water heater with a water heater connected to a main water path for hot water supply having a water amount detection means, the integrated flow rate is detected by the water amount detecting means by the time performs water filling the circulation path of the water supply means is opened, the high water level detecting means from the medium water level detection means becomes oN is turned oN,
Comparing with the specified difference between the middle water level and the high water level in the tank
A hot water heating system provided with a determination means for determining whether or not the filling of the circulation path has been completed. 2. A circulation path for circulating hot water for heating, a tank for storing hot water in the circulation path, a pump, a heat exchanger heated by a burner, and a heating radiator, A low water level detecting means which is turned on at a predetermined low water level or higher, a medium water level detecting means which is turned on at a predetermined middle water level higher than the low water level, and a predetermined high water level higher than the middle water level A high-water level detecting means that is turned on at the same time, a water supply path having a water supply means is connected thereto, and the water supply path is a hot water heater with a water heater connected to a main water path for hot water supply having a water amount detection means, the integrated flow rate is detected by the water amount detecting means by the time performs water filling the circulation path of the water supply means is opened, the high water level detecting means from the medium water level detection means becomes oN is turned oN,
A determination means is provided for determining whether or not the filling of the circulation path is completed by comparing a predetermined water amount obtained by adding a predetermined water amount to a predetermined difference water amount between the middle water level and the high water level in the tank. Hot water heating system. 3. A circulation path for circulating warm water for heating, a tank for storing hot water in the circulation path, a pump, a heat exchanger heated by a burner, and a heating radiator; A low water level detecting means which is turned on at a predetermined low water level or higher, a medium water level detecting means which is turned on at a predetermined middle water level higher than the low water level, and a predetermined high water level higher than the middle water level A high-water level detecting means that is turned on at the same time, a water supply path having a water supply means is connected thereto, and the water supply path is a hot water heater with a water heater connected to a main water path for hot water supply having a water amount detection means, The water supply means is opened to fill the circulation path, and after the middle water level detection means is turned ON, a predetermined amount of water is supplied to the circulation path, the water supply means is closed, and the water supply means is opened and then closed. The product detected by the water amount detection means before A hot water heating system comprising: a determination unit that determines that the water filling of the circulation path has ended when the middle water level detection unit is kept ON for a predetermined time determined according to the calculated flow rate.