JP3144149B2 - 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 a method for filling a pipe in a hot water heating system.

[0002]

2. Description of the Related Art Conventionally, the applicant of the present invention has previously filed Japanese Patent Application No. 4-316496 as a method of filling a tank or a circulation path in a hot water heating apparatus.

In this example, water is injected into a tank and the heat exchanger is heated while the pump is turned on, and after a certain period of time, the temperature of the hot water is determined by the heating temperature difference between the detected value of the bypass temperature sensor and the detected value of the return temperature sensor. If the heating temperature difference is not equal to or higher than the predetermined temperature, the heating medium supply valve is closed and a failure occurs, and the hot water normally circulates through the heating load. Had not been determined.

[0004]

However, in the above-mentioned prior art, it can be determined that the heat medium supply valve is closed due to a failure and that the hot water is not circulating normally to the heating load, but the heat medium supply valve is opened. If the heat medium supply valve failed because it could not be closed as it was, it was erroneously determined to be normal despite the failure of the heat medium supply valve. Therefore, in the above-described conventional example, even when the user stops the operation of the first load for heating, if another user performs the operation of the second load for heating, the heating for the first load is not performed. Since the heat medium supply valve used for the first load is open and fails without closing, the heating operation using the first load for heating is performed, which is uncomfortable for the user. .

Therefore, in the present invention, it is possible to accurately determine the open / close state of the heat medium supply valve provided in the hot water heating apparatus and to reliably determine in what state the heat medium supply valve is malfunctioning. It is an object of the present invention to provide a hot water heating device provided with a determination unit.

[0006]

A circulation path for circulating hot water, a heat exchanger for heating hot water, a pump for supplying hot water, a heating load, and a supply of circulating hot water to the circulation path. A high temperature sensor that detects the temperature of the hot water heated by the heat exchanger, a return temperature sensor that detects the temperature of the hot water after being heated by the heat exchanger and radiated by the heating load, And a heating medium supply valve capable of supplying hot water to the heating load by the above, wherein the circulation path branches the starting end of the bypass path downstream of the heat exchanger,
The end of the bypass is a hot water heating device connected to the circulation path near the return temperature sensor. The pump is turned on while heating the heat exchanger while injecting water into the tank, and the detection value of the high temperature sensor is constant. And then open the heat medium supply valve, and open the heat medium supply valve based on the detection value of the high temperature sensor and the detection value of the return temperature sensor for a certain period of time after opening the heat medium supply valve. Is determined, and then the heat medium supply valve is closed, and the heat medium supply valve is determined based on the detection value of the high temperature sensor and the detection value of the return temperature sensor during a certain period of time after the heat medium supply valve is closed. The first feature is that a determination means for determining whether or not is closed is provided.

Further, a first circulation path for circulating hot water, a tank for supplying hot water to the first circulation path, a pump for supplying hot water, a heat exchanger for heating the hot water, and a high-temperature water A first load for heating required, and a first heat medium supply valve capable of supplying hot water to the first load by opening the first load, the first heat medium supply valve being provided from the first circulation path downstream of the heat exchanger. The first end of the bypass, which short-circuits the first circulation path, is branched, and the end of the bypass path is connected to the upstream side of the tank in the first circulation path, and the tank is inserted between the tank and the heat exchanger in the first circulation path. A low temperature sensor for detecting hot water temperature is provided, and a start end of a second circulation path is branched from a first circulation path downstream of the low temperature sensor, and an end of the second circulation path is closer to an end of a bypass path in the first circulation path. Connected to the upstream side, the second circuit has a lower temperature than the first load. A second load for heating that requires water, and a second heat medium supply valve that can be opened to supply hot water to the second load. A hot water heating apparatus provided with a return temperature sensor for detecting a temperature of hot water after heat is radiated by a first load or a second load, wherein a pump is turned on and a heat exchanger is heated by turning on a pump while pouring water into a tank. The second heat medium supply valve is opened after controlling the detection value of the sensor to be a constant value, and the detection value of the low temperature sensor and the return temperature sensor for a certain time after opening the second heat medium supply valve It is determined whether or not the second heat medium supply valve has been opened based on the detected value of the second heat medium supply valve. Then, the second heat medium supply valve is closed, and the second heat medium supply valve is closed for a predetermined time after the second heat medium supply valve is closed. The second value is obtained based on the detection value of the temperature sensor and the detection value of That media supply valve is provided judging means for judging whether or not the closed second
The feature is.

[0008]

In the present invention, the detected value of the high temperature sensor and the return temperature when the heat exchanger is heated and the heat medium supply valve is opened and closed by controlling the detected value of the high temperature sensor to be a constant value. The open / closed state of the heat medium supply valve can be grasped from the detection value of the sensor, and therefore, the failure state of the heat medium supply valve can also be accurately determined.

In the case where a second load and a second heat medium supply valve which require hot water lower than the high-temperature water are provided separately from the first load which requires high-temperature water, the heat exchanger is heated. The second heat medium supply valve is opened and closed by controlling the detection value of the low temperature sensor to be a constant value, and the detection value of the low temperature sensor for detecting the temperature of hot water supplied to the second load and the return temperature sensor The open / closed state and the failure state of the second heat medium supply valve can be accurately determined based on the detected value.

[0010]

FIG. 1 is a configuration diagram showing the configuration of a hot water heating apparatus according to the present invention. Reference numeral 1 denotes a hot water heating device, in which a circulation path 2 is disposed, and is connected to a heating radiator 17 described later. A return temperature sensor 3 for detecting a return hot water temperature and a tank 4 for storing circulating hot water are provided in the circulation path 2 from the upstream side.
And a pump 5 for supplying hot water, a heat exchanger 6 for heating the hot water, and a high temperature sensor 7 for detecting the temperature of the hot water heated by the heat exchanger 6.

The tank 4 has an ON-OFF type low water level sensor 8 which is turned on when a predetermined low water level or more in the tank is detected, and is turned on when a predetermined middle water level higher than the low water level is detected. An ON-OFF type middle water level sensor 9 and an ON-OFF type high water level sensor 10 which turns ON when a predetermined high water level higher than the middle water level is detected, and the water supply valve 11 is opened. By doing so, hot water can be injected into the tank 4. Reference numeral 12 denotes an overflow port provided in the tank 4.

The heat exchanger 6 is heated by the burner 13, opens the on-off valve 14, and varies the opening of the proportional valve 15 to obtain a required gas amount.

Reference numeral 16 denotes a high temperature sensor 7 in the circulation path 2.
This is a bypass path that branches off at the start end at point A on the downstream side and connects at the end at point B near the return temperature sensor 3 in the circulation path 2.

Reference numeral 17 denotes a heating radiator such as a panel heater, which is opened by setting the heat medium supply valve 18 to 0 N, so that heated heating water can be circulated in the heating radiator 17.

Reference numeral 19 denotes a controller for controlling the above-described controlled devices such as the proportional valve and the pump. In the controller 19, a timer 20 having a timer function, a calculation unit 21 for performing calculation processing, a calculation value or The storage unit 22 includes a storage unit 22 that stores a detected value and the like, and a determination unit 23 that determines an open / closed state of the heat medium supply valve 18 in the heating device.

Reference numeral 24 denotes a remote controller connected to the controller 20, reference numeral 25 denotes a trial operation switch for causing the heater 1 to perform a water injection operation, reference numeral 26 denotes an operation switch of the heater 1, and reference numeral 27 denotes an appliance operating state. And a display unit for displaying a failure location of the appliance.

FIG. 2 is a sequence diagram showing the contents of the control of the present invention. Turn on the test run switch 25 (S
1), the pump 5 is turned on, the heat exchanger 6 is heated by the burner 13, and the opening of the proportional valve 15 is variably controlled so that the value detected by the high temperature sensor 7 becomes stable at a certain temperature (S).
2) Then, the heat medium supply valve 18 is turned on and opened (S
3) The detection value TH of the high temperature sensor 7 and the return temperature sensor 3
It is determined whether the temperature difference (TH-Th3) from the detected value Th3 is equal to or higher than the predetermined temperature ΔT (S4).

That is, when the heating medium supply valve 18 is closed, the heating circulating hot water circulated along the dotted arrow path in FIG. 1 circulates, and at that time, the detection value TH of the high temperature sensor 7
The present invention utilizes that the detection value Th3 of the return temperature sensor 3 is substantially equal to the detection value Th3. When the heating medium supply valve 18 is closed due to the heat conduction effect of the heated heating circulating water, the temperature of the hot water near the branch point B is equal, and the return temperature sensor provided upstream near the branch point B in FIG. 3 is equal to the detection value of the return temperature sensor 3 'provided downstream near the branch point B, and either one of them is preferably used.

In step 4, the temperature difference (TH-Th
If 3) is not equal to or higher than the predetermined temperature ΔT, the heat medium supply valve 18
It is determined whether or not the time t after turning ON is equal to or more than a predetermined time t1 (S10). If the temperature difference (TH-Th3) does not become equal to or more than a predetermined temperature ΔT within a predetermined time t1, the heat medium The determination means 23 determines that the supply valve 18 has failed while being closed (S11), turns off the pump 5, closes the original electromagnetic valve 14, stops the combustion, and displays the heat medium supply valve 18 on the display unit 27. Display the failure state and end (S1
2).

Within the predetermined time t1, the temperature difference (TH-T
When h3) is equal to or higher than the predetermined temperature ΔT, the heat medium supply valve 18
Is determined (S5), and the heat medium supply valve 18 is turned off (S6).

In step 7, it is determined whether or not the temperature difference (TH-Th3) between the detection value TH of the high temperature sensor 7 and the detection value Th3 of the return temperature sensor is less than a predetermined temperature ΔT. If it is not less than T, it is determined whether or not the time t from when the heat medium supply valve 18 is turned OFF in step 6 is equal to or longer than a predetermined time t1 (S13), and the temperature difference (TH-Th3) within the predetermined time t1. Is the predetermined temperature ΔT
If not, the determination means 23 determines that the heat medium supply valve 18 is open and malfunctions (S1).
4) The pump is set to 0FF, the original electromagnetic valve 14 is closed, combustion is stopped, and the display unit 27 displays a failure state of the heat medium supply valve 18 and ends (S15).

Within a predetermined time t1, the temperature difference (TH-Th
If 3) becomes lower than the predetermined temperature ΔT, it is considered that the heat medium supply valve 18 is closed, and the heat medium supply valve 18 is normally opened and closed without failure according to the determination result of the step 5. (S8), and the pump 5 is turned off.
F, the original electromagnetic valve 14 is closed to stop combustion, and the test operation is terminated (S9).

FIG. 3 shows another embodiment of the configuration of the hot water heating apparatus 1. In FIG. 3, reference numerals 1 to 27 are the same as those in FIG. On the downstream side of the tank 4 in the circulation path 2, a low temperature sensor 28 for detecting a temperature of hot water supplied to a second heating radiator 30 described later is provided.

At a point C downstream of the pump 5 and upstream of the heat exchanger 6 in the circulation path 2, the beginning of the second circulation path 29 branched from the circulation path 2 is branched, and the second circulation path 29 is branched.
A second heating medium radiator 30 provided separately from the heating radiator 17, and a second heat medium supply valve 31 that is opened at 0 N to supply hot water to the second heating radiator 30. The end of the second circulation path 29 is connected to a point D on the upstream side of the return temperature sensor 3 in the circulation path 2.

FIG. 4 is a sequence diagram showing the contents of control using the hot water heating apparatus of FIG.
1 to determine the open / closed state and to determine whether or not a failure has occurred.

The test run switch 25 is turned on (S2
1), the pump 5 is turned on, the heat exchanger 6 is heated by the burner 13, and the opening of the proportional valve 15 is variably controlled so that the value detected by the low temperature sensor 28 becomes stable at a certain temperature (S).
22) Next, the second heat medium supply valve 31 is turned on to open (S23), and the temperature difference (TL-Th3) between the detection value TL of the low temperature sensor 28 and the detection value Th3 of the return temperature sensor 3 is equal to a predetermined temperature. It is determined whether or not ΔT or more (S24).

In step 24, the temperature difference (TL-Th
If 3) is not equal to or higher than the predetermined temperature ΔT, it is determined whether or not the time t from when the second heat medium supply valve 31 is turned on is equal to or longer than a predetermined time t1 (S30). If the difference (TL−Th3) does not exceed the predetermined temperature ΔT or more, the determining means 23 determines that the second heat medium supply valve 31 has failed with the valve closed (S31), and the pump 5 is turned off. Then, the combustion is stopped by closing the original electromagnetic valve 14, the failure state of the second heat medium supply valve 31 is displayed on the display unit 27, and the process is terminated (S32).

Within the predetermined time t1, the temperature difference (TL-T
If h3) is equal to or higher than the predetermined temperature ΔT, the determination means 23 determines that the second heat medium supply valve 31 has been opened (S25), and turns off the second heat medium supply valve 31 (S26).

In step 27, the low temperature sensor 28
It is determined whether or not the temperature difference (TL−Th3) between the detection value TL of the return temperature sensor 3 and the detection value Th3 of the return temperature sensor 3 is lower than the predetermined temperature ΔT.
In step S3, it is determined whether the time t from when the second heat medium supply valve 31 is set to 0FF is equal to or longer than a predetermined time t1.
3) If the temperature difference (TL−Th3) does not become lower than the predetermined temperature ΔT within the predetermined time t1, the determination unit 23 determines that the second heat medium supply valve 31 has failed while being opened.
Is determined (S34), the pump is set to 0FF, and the original solenoid valve 1
4 is closed to stop the combustion, the display section 27 displays the failure state of the second heat medium supply valve 31, and ends (S35).

Within a predetermined time T1, the temperature difference (TL-T
If h3) becomes lower than the predetermined temperature ΔT, it is considered that the second heat medium supply valve 31 is closed, and the second heat medium supply valve 31 normally opens and closes without failure according to the determination result of the step 25. The determining means 23 determines that it is operating (S28),
The pump 5 is turned off, the original electromagnetic valve 14 is closed, and the combustion is stopped, and the test operation is completed (S29).

In short, according to the present invention, the heating medium supply valve is opened and closed by comparing the temperature of the hot water supplied to the heating load with the temperature of the hot water after the heating operation is performed. The open / closed state and the failure state can be reliably detected.

[0032]

According to the present invention, the open / closed state and the failure state (open failure and closed failure) of the heat medium supply valve capable of supplying hot water to the heating load can be reliably grasped. Therefore, the convenience for the user is greatly improved as compared with the conventional example.

[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 configuration of a hot water heating device of the present invention.

FIG. 4 is a sequence diagram showing the contents of control according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 hot water heating device 2 circulation path (first circulation path) 3 return temperature sensor 4 tank 5 pump 6 heat exchanger 7 high temperature sensor 16 bypass path 17 heating radiator (first load) 18 heat medium supply valve (first heat) Medium supply valve) 23 determination means 28 low temperature sensor 29 second circulation path 30 second heating radiator (second load) 31 second heat medium supply valve

Claims (2)

(57) [Claims] 1. A circulation path for circulating hot water, a heat exchanger for heating hot water in the circulation path, a pump for supplying hot water, a heating load, and a tank for supplying circulating hot water, A high temperature sensor that detects the temperature of the hot water heated by the heat exchanger, a return temperature sensor that detects the temperature of the hot water after being heated by the heat exchanger and radiated by the heating load, and A heating medium supply valve capable of supplying hot water to a heating load, wherein the circulation path branches off at a start end of a bypass path downstream of the heat exchanger, and an end of the bypass path has a circulation path near the return temperature sensor. The hot water heating device is connected to the tank, the pump is turned on while the water is being injected into the tank, and the heat exchanger is heated to control the detection value of the high temperature sensor to be a constant value, and then the heating medium supply valve is turned on. Open, and open the heat medium supply valve. It is determined whether or not the heat medium supply valve has been opened based on the detection value of the high temperature sensor and the detection value of the return temperature sensor for a certain period of time after that, and then close the heat medium supply valve to supply the heat medium. A hot water heating system provided with a determination means for determining whether or not the heat medium supply valve is closed based on a detection value of the high temperature sensor and a detection value of the return temperature sensor during a certain period of time after the valve is closed; apparatus. 2. A first circulation path for circulating hot water,
In the first circulation path, a tank for supplying hot water, a pump for supplying hot water, a heat exchanger for heating hot water, a first load for heating that requires high-temperature water, First
A first heat medium supply valve capable of supplying hot water to the load,
From the first circulation path downstream of the heat exchanger, the starting point of the bypass path that short-circuits the first circulation path branches off, and the end of the bypass path is connected to the tank upstream of the first circulation path. A low temperature sensor for detecting the temperature of hot water passing through the tank is provided between the tank and the heat exchanger, and the start of the second circulation path branches off from the first circulation path downstream of the low temperature sensor to form a second temperature sensor. The end of the circulation path is connected upstream of the end of the bypass path in the first circulation path, and the second circulation path is opened by opening a second load for heating that requires hot water lower in temperature than the first load. A second water supply capable of supplying hot water to the second load.
A heating medium supply valve, and a return temperature sensor near the end of the bypass in the first circulation path for detecting the temperature of the hot water after the heat is radiated by the first load or the second load. Then, the pump is turned on while the water is being injected into the tank, the heat exchanger is heated to control the detected value of the low temperature sensor to be a constant value, and then the second heat medium supply valve is opened to supply the second heat medium. It is determined whether or not the second heat medium supply valve has been opened based on the detection value of the low temperature sensor and the detection value of the return temperature sensor for a certain period of time after opening the valve,
Next, the second heat medium supply valve is closed, and the second heat medium supply valve is closed by the detection value of the low temperature sensor and the detection value of the return temperature sensor for a certain period of time after the second heat medium supply valve is closed. A hot-water heating device comprising a determination means for determining whether or not the heating has been completed.