JP2924529B2 - 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 capable of reliably determining whether or not water has been injected into a hot water heating system.

[0002]

2. Description of the Related Art Conventionally, as an example of a method for initially injecting circulating water in a hot water heating apparatus, there is JP-A-3-233231. In this example, it has been determined that the injection of the circulating water has been completed when the water level in the tank for storing the circulating water continues at a predetermined high water level for a predetermined time (T).

[0003]

However, in the above-described conventional example, when a heating medium supply valve for supplying hot water to the heating terminal is provided, the heating medium supply valve is closed due to a failure. If the water level in the tank continues at the predetermined high water level for a predetermined time (T), the water injection in the hot water heating device is regarded as completed, and the water injection is terminated. Therefore, although water injection was not performed reliably in the circulation path downstream of the heat medium supply valve, it was erroneously determined that water injection was completed.

In the above-mentioned conventional example, since the heating terminal is constituted by a thin tube such as a panel heater, the thin tube has a large pipe resistance and is liable to be clogged with dust. Therefore, even if the heat medium supply valve is normally opened and the water level in the tank continues at a predetermined high water level for a predetermined time (T), the water filling in the heating terminal and the return pipe is not reliably performed. Nevertheless, it was erroneously determined that water injection was completed.

Therefore, an object of the present invention is to solve the above-mentioned problem, that is, to provide a hot water heating system capable of reliably detecting a poor water injection.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention solves the above-mentioned problem. Connected to the heating terminal, the outgoing pipe includes a pump that circulates hot water, a heat exchanger that heats the hot water, and a heating medium supply valve that can supply hot water to the heating terminal by opening it. The pipe emits a start end to the heating terminal, the end is connected to the tank, and the return pipe includes a heating means such as a heater for heating hot water, and a temperature sensor for detecting a temperature of the hot water heated by the heating means, In a hot water heating device provided with a water supply means for supplying hot water into the tank, the water supply means is opened with the heat medium supply valve closed to fill the hot water heating apparatus with water, and the temperature after a certain temperature rise by the heating means Sensor Is stored, the heat medium supply valve is opened, the pump is turned on, the pump is turned on, and the water sensor in the hot water heating device is filled with the detected value of the temperature sensor after a certain period of time has elapsed and the stored temperature sensor detected value. The first feature is that a determination means for determining whether or not the processing has been completed is provided.

[0007] Further, a circulation path comprising a first going pipe and a first return pipe for circulating hot water, the first going pipe originates from a tank storing hot water, and an end is connected to a first heating terminal. The first outflow pipe includes a pump for circulating hot water, a heat exchanger for heating hot water, and a first heat medium supply valve that can be opened to supply hot water to the first heating terminal. The return pipe originates at the first heating terminal, the terminal is connected to the tank, and the first return pipe has heating means such as a heater for heating hot water, and a temperature sensor for detecting the temperature of the hot water heated by the heating means. The tank has a water supply means for supplying hot water into the tank, and a starting end of the second going pipe is emitted from the upstream side of the heat exchanger in the first going pipe, and an end of the second going pipe is a second heating terminal. By connecting to the second going pipe A second heating medium supply valve capable of supplying hot water to the second heating terminal, wherein the second heating terminal emits a starting end of a second return pipe, and an end of the second return pipe has hot water connected to the first return pipe; In the heating device, the heating medium supply valve is closed and the water supply means is opened to fill the hot water heating device with water, the detection value of the temperature sensor after a certain temperature rise by the heating means is stored, and the heat medium supply valve is opened to pump the heating medium. And turning on the pump, and determining means for judging whether or not the water filling in the hot water heating apparatus has been completed based on the detected value of the temperature sensor after a lapse of a predetermined time after turning on the pump and the stored temperature sensor detected value. This is the second feature.

[0008]

In the present invention, a heating means such as a heater and a temperature sensor for detecting the temperature of hot water heated by the heating means are provided on the return pipe, and the detected value of the temperature sensor after a certain temperature rise by the heating means is stored. Then, the heat medium supply valve is opened, the pump is turned on, and whether or not the water filling in the hot water heating device has been completed is determined based on the detected value of the temperature sensor after a lapse of a predetermined time after the pump is turned on and the detected value of the stored temperature sensor. Therefore, it is possible to reliably detect poor water filling in the hot water heating device due to a failure of the heat medium supply valve or the like.

[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 return pipe 3 has a heating means 11 such as a heater,
A temperature sensor 12 heated by the heating means 11 is provided.

The tank 4 has a water supply means 13 for supplying city water into the tank 4, a low water level detecting means 14 for detecting a predetermined low water level or higher in the tank 4, and a predetermined medium higher than the low water level. It is provided with a middle water level detecting means 15 for detecting a water level or higher, a high water level detecting means 16 for detecting a predetermined high water level higher than the middle water level, and an overflow port 17 for discharging hot water out of the tank 4. .

The above-mentioned heat exchanger 7 is heated by a burner 18, and the amount of gas to the burner 18 is obtained by opening the on-off valve 19 and varying the opening of the proportional valve 20. Reference numeral 21 denotes a bypass which starts at the downstream side of the heat exchanger 7 in the outgoing pipe 2 and is a bypass.
Is connected downstream by a heating means 11 and a temperature sensor in the return pipe 3. Reference numeral 22 denotes a controller that controls a controlled device such as the above-described proportional valve. The controller 22 includes a timer 23 having a clock function, a storage unit 24 that stores a temperature detection value, and the like, and determines whether or not water filling is completed. And a determination unit 25 for determining.

Reference numeral 26 denotes a remote controller connected to the controller 22. When the test run switch 27 is turned on, water can be filled in the pipe. Reference numeral 28 denotes a display unit that displays the operating status of the hot water heating apparatus 1 and a failure location.

FIG. 2 is a sequence diagram showing the contents of the control of the present invention. Turn ON the test run switch 27 (S
1) The water supply means 13 is opened (S2), and the temperature sensor 1
2 is stored in the storage unit 24 (S3).

Next, the heating means 11 is turned on (S4), it is determined whether or not a time t from the turning on of the heating means 11 has passed a predetermined time to (S5). It is determined whether the temperature T has become equal to or higher than a certain temperature (TH1 + a) (S6). If the temperature does not increase by the predetermined temperature a within the predetermined time to, the heating unit 11 is regarded as defective, the heating unit 11 is turned off, the water supply unit 13 is closed, and the display unit 28 displays the heating unit 11 defect. The operation is performed (S13).

Here, the predetermined time to is a necessary and sufficient time required for the heating means 11 to raise the temperature of the hot water by a predetermined temperature a. When the predetermined temperature a rise is detected by the heating means 11, the hot water temperature (TH1 + a) at that time is stored in the storage unit 24
(S7).

Next, the heating medium supply valve 9 is opened (S8).
Hot water is circulated through the heating terminal 10, and the pump 6 is turned on (S9). In step 10, it is determined whether or not the time t from when the pump 6 is turned on has passed a predetermined time t1, and in step 11, whether or not the temperature T detected by the temperature sensor 12 is lower than the stored temperature (TH1 + a). Is determined.

The storage temperature (TH1 +
If not less than a), the heating medium supply valve 9 closes due to a failure, and circulates in hot water along the hatched path in FIG.
Further, it is assumed that the hot water is being heated by the heating means 11, and the display unit 28 displays a failure state, and the pump 6 is turned off.
F, a safety operation of turning off the heating means 11 and closing the water supply means 13 is performed (S14).

The memory temperature (TH1 +
If the value is less than a), it is considered that the heating medium supply valve 9 is normally opened, and the hot water that has been radiated by the heating terminal 10 is normally circulating. It is considered that water filling was surely performed inside
FF, the heating means 11 is turned off, the water supply means 13 is closed, and the water injection operation is completed (S12). Note that the determination temperature in step 11 may be determined based on whether or not the temperature is lower than the temperature (TH1 + ad) in consideration of the heat radiation action of the heating terminal device 10.

FIG. 3 shows another embodiment of the configuration of the hot water heating apparatus in FIG. 1, and reference numerals 1 to 28 in the figure are common to FIG. The starting point of the second outgoing pipe 29 originates from the first outgoing pipe 2 on the upstream side of the heat exchanger 7, and the second outgoing pipe is provided with a second heat medium supply valve 30.
The end of 9 is connected to the second heating terminal 31. Second
The starting end of the second return pipe 32 is connected to the heating terminal 31,
The end of the second return pipe 30 is connected to the heating means 11 and the temperature sensor 12 upstream of the first return pipe 3.

Incidentally, also in the hot water heating apparatus in FIG. 3, control according to the sequence shown in FIG. 2 can be performed.

[0023]

According to the present invention, the return pipe is provided with a heating means such as a heater and a temperature sensor for detecting the temperature of the hot water heated by the heating means. The heat medium supply valve is opened, the pump is turned on, the pump is turned on, and the detection value of the temperature sensor after a certain period of time has elapsed after the pump is turned on is compared with the detection value of the stored temperature sensor. Since it is determined whether or not the process has been completed, it is possible to reliably detect a poor water filling in the hot water heating apparatus due to a failure of the heat medium supply valve or the like at any place in the piping.

[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.

[Explanation of symbols]

 2 Outgoing pipe (first outgoing pipe) 3 Return pipe (first return pipe) 4 Tank 6 Pump 7 Heat exchanger 9 Heat medium supply valve (First heat medium supply valve) 10 Heating terminal (First heating terminal) DESCRIPTION OF SYMBOLS 11 Heating means 12 Temperature sensor 13 Water supply means 24 Storage part 25 Judgment means 29 2nd going pipe 30 2nd heat medium supply valve 31 2nd heating terminal unit 32 2nd return pipe

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F24D 3/10 F24D 3/00

Claims (2)

(57) [Claims] 1. A circulation path composed of a forward pipe and a return pipe for circulating hot water, a forward pipe originating from a tank storing hot water, and a distal end connected to a heating terminal, and circulating hot water in the forward pipe. Equipped with a pump, a heat exchanger that heats hot water, and a heat medium supply valve that can supply hot water to the heating terminal by opening it.The return pipe starts at the heating terminal and connects to the tank at the end. The return pipe has a heating means such as a heater for heating hot water, a temperature sensor for detecting the temperature of the hot water heated by the heating means, and the tank has a water supply means for supplying hot water into the tank. In the hot water heating apparatus, the heating medium supply valve is closed and the water supply means is opened to fill the hot water heating apparatus with water, the detection value of the temperature sensor after a certain temperature rise by the heating means is stored, and the heat medium supply valve is opened. Pump A determination means is provided for determining whether or not the water filling in the hot water heating apparatus has been completed based on the detected value of the temperature sensor after a predetermined time has elapsed after the pump is turned on and the stored temperature sensor value after the pump is turned on. And hot water heating system. 2. A circulation path comprising a first outgoing pipe and a first return pipe for circulating hot water, the first outgoing pipe originating from a tank storing hot water, and an end connected to a first heating terminal,
The first outflow pipe includes a pump for circulating hot water, a heat exchanger for heating hot water, and a first heat medium supply valve that can be opened to supply hot water to the first heating terminal. The return pipe originates at the first heating terminal, the terminal is connected to the tank, and the first return pipe has heating means such as a heater for heating hot water, and a temperature sensor for detecting the temperature of the hot water heated by the heating means. The tank has a water supply means for supplying hot water into the tank, and a starting end of the second going pipe is emitted from the upstream side of the heat exchanger in the first going pipe, and an end of the second going pipe is a second heating terminal. The second heating terminal is connected to the second heating pipe so that hot water can be supplied to the second heating terminal.
A heating medium supply valve, wherein the second heating terminal emits a start end of the second return pipe, and an end of the second return pipe is connected to the first return pipe in the hot water heating device, with the heat medium supply valve closed. Open the water supply means, fill the hot water heating device with water, store the detected value of the temperature sensor after a certain temperature rise by the heating means,
Open the heat medium supply valve, turn on the pump, and turn on the pump.
N. A hot water heating system comprising a determination means for determining whether or not water filling in the hot water heating apparatus has been completed based on a detected value of the temperature sensor after a lapse of a predetermined time as N and the detected value of the stored temperature sensor. .