JPH039373B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a boiler for hot water generation, which is connected to a tank, a hot water circulation pump, and a heating heat exchanger, and is provided with a heating device for the heat exchanger, and a boiler installed indoors. The present invention relates to a hot water circulation type heating device which is connected to a radiator through an outgoing flow path and a return flow path for hot water circulation.

In this type of heating equipment, when the indoor temperature reaches a set value, measures are usually taken to reduce heat radiation loss by stopping the hot water circulation within the equipment. ,
Conventionally, the following configuration has been adopted.

That is, in FIG. 1, 01 is a boiler for hot water generation which connects a tank 02, a pump 03 for hot water circulation, and a heat exchanger 04 for heating, and is provided with a gas burner as a heating device 05 for the heat exchanger 04. For this purpose, the indoor water 08 is
A heatsink such as a fan convector set to 0
9 is connected. And the heat exchanger 04
A hot water temperature detecting device 010 is provided near the hot water outlet of the hot water temperature detecting device 010, and when the detected hot water temperature of the hot water temperature detecting device 010 reaches the set temperature, a cutoff valve installed in the fuel supply path 011 to the heating device 05 is installed. By reversibly closing and moving the pump 012, the temperature of hot water discharged from the boiler 01 is kept approximately constant. It was configured to automatically shut down when a set value was reached.

According to this configuration, when the indoor temperature rises to a predetermined temperature, the operation of the pump 03 is automatically stopped, so that the indoor temperature 08 can be maintained at a substantially constant temperature without unnecessary heating action. However, on the other hand, there was a drawback that the heat radiation loss was extremely large, as described below.

In other words, when the temperature in the room 08 reaches the set temperature, the pump 03 automatically stops as described above, but at the same time, the water near the hot water outlet of the heat exchanger 04, which is heated by the heating device 05, stops. The temperature rises rapidly, and the temperature rise causes the hot water temperature detection device 010
The cutoff valve 0 of the fuel supply path 011 is detected by
12 is immediately moved closed. That is, as a result,
Immediately after pump 03 stopped operating, heating device 05 was also supposed to stop its heating action. Then, in this state, the heating heat exchanger 04 suddenly functions as a heat exchanger with extremely high heat dissipation efficiency, and the remaining heat exchanger 04 itself heat,
All the remaining heat of the high temperature water in the heat exchanger 04 and the hot water flow path in the vicinity is transferred to the device 01.
This resulted in a huge waste of energy being released to the outside.

The present invention has been made in view of the above-mentioned conventional situation, and its purpose is to wastefully dissipate the residual heat in the heat exchanger and hot water circulation path after the heating action is automatically stopped as described above. The point is that it can be collected without any problems.

In order to achieve the above object, the hot water circulation type heating device according to the present invention has the above-mentioned configuration, and is provided with a bypass flow path from the heating heat exchanger to the tank, and also has an indoor temperature detection device that is set at a set temperature. When reaching this point, the hot water circulation in the hot water circulation reciprocating flow path is cut off, the heating action of the heating device is stopped, and further, after a certain period of time has passed, the operation of the hot water circulation pump is stopped. It has the feature of being equipped with a control mechanism.

The functions and effects exhibited by the above characteristic configuration are as follows.

That is, when it is detected that the indoor temperature has reached the desired set temperature, the operation of the pump is not immediately and directly stopped as in the conventional case;
First, the hot water circulation in the hot water circulation reciprocating flow path is cut off, the heating action of the heating device on the heat exchanger is stopped, and then the pump is kept operating for a certain period of time, so that the heat exchanger and Since the structure is configured so that the high-temperature water remaining in the flow path in the vicinity is quickly returned to the tank via the bypass flow path, the problem that conventionally occurs after the heating device stops working due to the automatic stop of the heating action It is possible to effectively prevent large heat radiation losses from the heat exchanger and its vicinity, and it is also possible to recover most of the remaining heat in the tank and reuse it for the next heating operation. A hot water circulation type heating device with extremely high thermal efficiency has been achieved.

Hereinafter, embodiments of the present invention will be described based on the drawings (FIG. 2).

Reference numeral 1 denotes a hot water generation boiler, in which an adiabatic expansion tank 2, a hot water circulation pump 3, and, for example, a Finch-Ube type heating heat exchanger 4 are connected in series in this order from the upstream side. A gas burner is provided as a heating device 5, and a hot water return bypass passage 15 extending from near the hot water outlet of the heat exchanger 4 to the tank 2 is provided. In the figure, 10 is a hot water temperature detector provided very close to the hot water outlet of the heat exchanger 4, 11 is a fuel gas supply path to the heating device 5,
Reference numeral 12 designates an electromagnetic shutoff valve, and 13 designates a flow control valve and source valve provided upstream of the shutoff valve 12.

Reference numeral 9 denotes a radiator such as a fan convector installed in the room 8 to be heated, and includes an outgoing flow path 6 for hot water circulation whose upstream end is connected to the hot water outlet of the heat exchanger 4, and a downstream end. is connected to the hot water generation boiler 1 via a return flow path 7 for hot water circulation connected to the tank 2. In the figure, 14 is indoor 8
This is a temperature detection device for detecting the temperature of the room 8, and it may be provided inside the radiator 9 or at any arbitrary position in the room 8. Further, 16 is an electromagnetic shutoff valve provided immediately downstream of the branch point (a) of the bypass flow path 15 in the outgoing flow path 6. still,
This may be provided at any position in the reciprocating channels 6 and 7.

Next, the control mechanism in the above device will be explained.

Reference numeral 17 denotes a control device, which is configured to perform two mutually independent control functions.

One of them is a control function to maintain the temperature of the hot water discharged from the heat exchanger 4 substantially constant, and when the temperature detected by the hot water temperature detector 10 reaches a set value, the fuel gas supply path 11 isolation valve 12
The device automatically and reversibly closes within a certain range.

Another function is the indoor temperature detection device 14.
When the detected temperature reaches a set value, the cutoff valve 12 of the fuel supply path 11 and the cutoff valve 16 of the outgoing flow path 6 are automatically closed;
After a certain period of time has elapsed, the operation of the pump 3 is stopped. This fixed time is set to approximately the time required for the entire amount of high-temperature water in the heat exchanger 4 and the flow path in its vicinity to return to the tank 2, and can be set using any arbitrary timer such as various timers or delay circuits. can use things.

In addition, the bypass passage 15 is constructed with a pipe having a smaller diameter than the reciprocating passages 6 and 7, or a constricted portion is formed in the middle thereof, so that high-temperature water does not bypass flow during normal heating operation. , it is desirable that the flow resistance is greater than that in the reciprocating channels 6 and 7. To achieve the same purpose, shutoff valve 1 is installed as indicated by the dotted line in the figure.
6 may be provided, or instead of these isolation valves 16 and 18, a branch point (a) of the bypass passage 15, not shown, may be provided.
It is also possible to provide a configuration in which one three-way valve is provided in the three-way valve.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a conventional hot water circulation type heating device, and FIG. 2 is a schematic diagram of a hot water circulation type heating device according to the present invention. 1...boiler for hot water generation, 2...tank, 3...
...Hot water circulation pump, 4...Heating heat exchanger, 6
... Outgoing flow path for hot water circulation, 7... Return flow path for hot water circulation, 14... Indoor temperature detector, 15... Bypass flow path.

Claims (1)

[Claims] 1 A boiler 1 for generating hot water, which is connected to a tank 2, a pump 3 for hot water circulation, and a heat exchanger 4 for heating, and is provided with a heating device 5 for the heat exchanger 4, and a radiator 9 installed in a room 8. In the hot water circulation type heating device, which is configured by connecting the above through an outgoing flow path 6 and a return flow path 7 for hot water circulation, a bypass flow path 15 leading from the heating heat exchanger 4 to the tank 2 is provided, and an indoor When the temperature detection device 14 reaches the set temperature, the hot water circulation in the hot water circulation reciprocating channels 6 and 7 is cut off, and the heating action of the heating device 4 is stopped, and further, after a certain period of time has elapsed, , A hot water circulation type heating device characterized in that a control mechanism for stopping the operation of the hot water circulation pump 3 is provided.