JPS6316013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention configures a circulation circuit between a heat source and a radiant heating panel by a feed pipe and a return pipe via a circulation pump, and exchanges heat between the inlet hot water and the outlet hot water of the radiant heating panel. The present invention relates to a radiant heating device comprising a radiant heating panel, and particularly to a control configuration for stabilizing the surface temperature of the radiant heating panel.

To explain a conventional radiant heating device with reference to FIG. 1, a circulation circuit is constructed from a heat source device 1 to a radiant heating panel 2 by a feed pipe 4 and a return pipe 5 via a circulation pump 3. The pipe 4 and the return pipe 5 are connected by a bypass pipe 6. Further, upstream of the connection 7 between the feed pipe 4 and the bypass pipe 6, a flow rate control valve 9 is provided which operates in conjunction with a temperature sensor 8 provided downstream of the connection 7. Further, a circulation pump 10 is disposed between the connection portion 7 and the radiant heating panel 2. 11 is another radiator, and a feed pipe 12 and a return pipe 13 are also piped to the radiator 11. 14 is an arrow indicating the flow within the circuit.

Next, the operation in the conventional example will be described. Hot water from the heat source device 1 is sent to the radiant heating panel 2 by the circulation pumps 3 and 10 to perform heating. At this time, when the temperature of the hot water to the radiant heating panel 2 reaches the set temperature of the temperature sensor 8, the flow rate control valve 9 is activated to reduce the circulating flow rate. However, inside the radiant heating panel 2, the necessary circulation flow rate of the radiant heating panel 2 flows through the circulation pump 10. In this state, the flow of hot water is as follows: circulation pump 10 → radiant heating panel 2 → return pipe 5 → bypass pipe 6 → circulation pump 10, and heating is performed in this state. When the hot water temperature drops and the temperature sensor 8 reaches the set temperature, the flow control valve 9 opens and the high temperature water from the heat source device 1 and the low temperature water from the bypass pipe 6 are mixed and radiated. The air is sent to the heating panel 2 for heating.

In this way, in the conventional example, in order to mix the high-temperature water from the heat source device 1 and the low-temperature water from the bypass pipe 6, it is necessary to provide multiple circulation pumps, which has the problem of increasing costs. .

An object of the present invention, in order to solve such problems, is to install a jet pump in the feed pipe from the heat source equipment, branch piping from the return pipe from the radiant heating panel to the suction port of the jet pump, and It is an object of the present invention to provide a radiant heating device in which a flow rate control valve that operates in conjunction with a temperature sensor is disposed in the circuit.

Next, the configuration of the radiant heating device according to the present invention will be described based on one embodiment. FIG. 2 is a diagram showing an embodiment of the present invention, in which a circulation circuit is configured from the heat source device 15 to the radiant heating panel 16 by a feed pipe 18 via a circulation pump 17 and a return pipe 19. At the same time, an electric valve 20, which is a flow control valve, is disposed on the feed pipe 18. Note that the electric valve 20 is connected to the radiant heating panel 16.
It is linked to a temperature sensor 21 that detects the temperature. Furthermore, a jet pump 22 is disposed on the feed pipe 18, and a branch pipe 24 from the return pipe 19 is connected to a suction port 23 of the jet pump 22. 25 is another radiator, and a feed pipe 26 and a return pipe 27 are also piped to the radiator 25. 28 is an arrow indicating the flow within the circuit.

To explain the operation in the above configuration, the heat source device 1
The hot water No. 5 is sent to the radiant heating panel 16 by the circulation pump 17 for heating, but when the hot water passes through the jet pump 22, the low temperature water circulating through the return pipe 19 is caused by the suction action of the jet pump 22. , flows through the branch pipe 24 to the suction port 23 of the jet pump 22, mixes with high temperature water from the heat source device 15, and heats the radiant heating panel 1.
6, the mixed hot water is sent to perform heating. However, in radiant heating, the radiant heating panel 16 is often the floor surface, and the surface temperature of the radiant heating panel 16 must be controlled within a certain temperature range.

In this embodiment, when the temperature of the radiant heating panel 16 reaches the set temperature or higher, the electric valve 20 is closed in conjunction with the temperature sensor 21 to stop hot water circulation to the radiant heating panel 16, and the radiant heating panel Heating is performed by the amount of heat stored in 16.
Furthermore, when the temperature of the radiant heating panel 16 decreases, the electric valve 20 is opened in conjunction with the temperature sensor 21, and the radiant heating panel 16 receives high-temperature water from the heat source device 15 and low-temperature water from the return pipe 19 through the jet pump 22. are mixed and circulated.

Therefore, in this embodiment, high-temperature water and low-temperature water are mixed by the suction action of the jet pump 22, and the surface temperature of the radiant heating panel 16 is controlled within a constant temperature range by the electric valve 20, making stable heating possible. becomes.

Next, another embodiment of the present invention will be described with reference to FIG. In FIG. 3, a feed pipe 32 is connected from the heat source device 29 to the radiant heating panel 30 via a circulation pump 31.
The return pipe 33 constitutes a circulation circuit, and the return pipe 33 is provided with an electric valve 34 that is a flow rate regulating valve. Note that the electric valve 34 is linked to a temperature sensor 35 attached to the return pipe 33 on the outlet side of the radiant heating panel 30. Furthermore, a jet pump 36 is disposed in the feed pipe 32, and a branch pipe 38 from the return pipe 33 is connected to a suction port 37 of the jet pump 36. Further, in the branch pipe 38, a manual opening/closing valve 39 is provided as a flow rate control valve.
is installed. 40 is another radiator, and a feed pipe 41 and a return pipe 42 are also piped to the radiator 40. 43 is an arrow indicating the flow within the circuit.

To explain the operation of the above configuration, when the high temperature water from the heat source device 29 is sent to the radiant heating panel 30 by the circulation pump 31, the low temperature water flowing through the return pipe 33 is
The water flows through the branch pipe 38 to the jet pump 36 and is mixed with high-temperature water from the heat source device 29.
The mixed hot water is sent to the radiant heating panel 30 for heating. Here, the suction capacity of the jet pump 36 is determined by the discharge pressure from the circulation pump 31 and the pressure on the outlet side of the jet pump 36. However, since the pressure in the circulation circuit varies depending on the number of radiant heating panels 30 and the size of the circulation pump 31, the mixing performance of the jet pump 36 varies depending on the scale of the system. The opening degree of No. 39 is set in advance to be an opening degree suitable for the system scale. Heating is performed in this state, and when the temperature reaches the set temperature of the temperature sensor 35 or higher during heating, the electric valve 34 is closed and the hot water circulation to the radiant heating panel 30 is stopped, and the heating is performed using the stored heat amount of the radiant heating panel 30. be done. Further, when the temperature of the return pipe 33 decreases and reaches the set temperature of the temperature sensor 35, the electric valve 34 is opened.
Heating operation is performed in a state where high temperature water from the heat source device 29 and low temperature water from the return pipe 33 are mixed.

According to the configuration of this embodiment, even if the system scale changes, it is possible to set in advance the optimal mixing amount for the system scale, which increases adaptability to various systems and provides more stable The panel surface temperature can be obtained.

In addition, disposed in the circulation circuit in this example,
In addition to motor-driven electric valves, flow control valves linked to temperature sensors include solenoid valves, thermal valves using a combination of wax thermometer and POSISTOR, or
A thermal expansion valve or the like that utilizes expansion of a heat medium due to the temperature of hot water may also be used.

As is clear from the above, the present invention has the following remarkable effects.

(a) The flow path of hot water in the radiant panel is connected in series with the circulation circuit, and the flow rate of hot water in the circulation circuit is determined by the power of the circulation pump and the opening degree of the electric valve connected in series with the circulation circuit. Therefore, there is less energy loss.

(b) Since the flow rate of hot water in the radiant heating panel is determined by the electric valve in addition to the power of the circulation pump, control operations are performed reliably and reliability is increased.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing one embodiment of a conventional radiant heating device, Fig. 2 is a system diagram showing one embodiment of the present invention, and Fig. 3 is a system diagram showing another embodiment of the present invention. It is a diagram. 15...Heat source machine, 16...Radiant heating panel, 17...
Circulation pump, 18...Feed pipe, 19...Return pipe, 20
...Flow control valve (electric valve), 21...Temperature sensor, 22...Jet pump, 23...Suction port, 24
...Branch piping, 39...Flow control valve (manual opening/closing valve).

Claims (1)

[Scope of Claims] 1. A circulation pump, a jet pump, a circulation circuit feed pipe that connects a heat source and a radiant heating panel via the circulation pump and the jet pump, and a circulation circuit that connects the radiant heating panel and the heat source. A circuit return pipe, a branch pipe connecting the suction port of the jet pump and the return pipe, a temperature sensor for detecting the temperature of the radiant heating panel or the return pipe, and a temperature sensor connected to the middle of the feed pipe or the return pipe. 1. A radiant heating device comprising: a flow control valve, the flow control valve controlling the temperature of hot water from the circulation pump in conjunction with the operation of the temperature sensor. 2. The radiant heating device according to claim 1, wherein the branch pipe is equipped with a flow control valve.