JPH059718B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention sends saturated steam generated in a steam generator at its vapor pressure to a heat radiating section, and imparts latent heat of condensation to surrounding gas or liquid in the heat radiating section. This invention relates to a steam-type heat transfer device in which condensed liquid (working liquid) is returned to liquid by using the vacuum effect generated within a steam generator, and heat is transferred by repeating this process.

[Prior art and its problems] Fig. 1 shows a conventional steam-type heat transfer device, which includes a steam generator 0 that can be turned on and off by a heating source 02.
The saturated steam generated in step 1 is sent to the heat radiation section 04 via the steam pipe 03 using its vapor pressure, and the condensed liquid that is condensed by giving latent heat of condensation to the surrounding gas or liquid in the heat radiation section 04 is once released into the atmosphere. Open type condensate reservoir 05
When the liquid level in the steam generator 01 drops to a certain level, the heating source 02 is stopped to generate a vacuum in the steam generator 01, and this vacuum effect is utilized. The condensate collected in the condensate reservoir is returned to the steam generator 01.

For this reason, in the case of the conventional example, heat transfer is intermittent, and even though the liquid return time is only about 10 seconds, there is a restriction that heat transfer stops during this time.

The above limitations can be ignored in the case of general heating, hot water supply, and bath heating, but the problem is that they cannot be applied to applications that require continuous heat transfer, such as hot air heaters in cold regions. There is.

Therefore, two steam generators were prepared, and the steam generators were connected in parallel to the steam feed pipe and the condensed working fluid return pipe, and the steam output side of each steam generator and the working fluid return pipe were connected in parallel. It is known that a continuous heat transfer means is proposed in which a total of four check valves are inserted in the side, and two steam generators can be operated alternately by the action of the check valves (in particular, 60-29591).

However, in the case of this known example, since a total of four check valves are used, the device becomes expensive, and in the case of check valves driven by differential pressure, there is a drawback that reliability is lacking.

An object of the present invention is to provide a steam-type heat transfer device that can be put to practical use by reducing costs and at the same time increasing the reliability of the device.

[Means for Solving the Problems] The configuration of the heat transfer device according to the present invention is as follows.

incorporating a first steam generator and a second steam generator filled with working fluid in the outdoor unit, and installing a liquid level sensor for detecting an upper level of the working fluid in each steam generator; A gas burner for heating is attached to each of the evaporator and the second steam generator, and a gas valve is attached to the gas flow path leading to each gas burner, and the inlet of the heat dissipation tube on the radiator side and the first evaporator generator are attached. a first steam pipe connects the outlet of the heat dissipation tube and the second steam generator, and a second steam pipe connects the outlet of the heat radiation tube and the second steam generator; The gas valve on the steam generator side is opened to ignite the gas burner, and upon receiving a signal from the liquid level sensor on the second steam generator side, the gas valve on the second steam generator side is opened and the gas burner is ignited. A steam-type heat transfer device comprising: a controller that opens a gas valve on the first steam generator side to alternately operate the first steam generator and the second steam generator.

[Operation] First, when the gas valve of the first steam generator opens and the gas burner is ignited to start heating, the steam of the working fluid is generated in the first steam generator, and this steam flows through the first steam pipe. The latent heat of condensation is condensed by supplying air or water, and the condensed working fluid is passed from the outlet through the second steam pipe to generate second steam. It goes into the vessel and collects here. As heat transfer progresses in this way, the level of the working fluid in the second steam generator rises, and when the liquid level sensor detects this, the gas valve on the first steam generator side is closed, and the second steam generator The side gas valve is opened, the gas burner is ignited, and the second steam generator side performs heating and steam generation.

As a result, the steam generated in the second steam generator enters the radiator tube from the outlet of the radiator via the second steam pipe, and the working fluid condensed in the same manner as above passes through the first steam pipe. and return to the first steam generator. Then, when the liquid level in the first steam generator rises and the liquid level sensor detects this, the gas valve on the first steam generator side is opened again to ignite the gas burner, and the second steam generator side Close the gas valve and turn off the gas burner. By operating the first and second steam generators alternately in this manner, the device can continuously release heat without waiting time in the radiator.

[Example] FIG. 2 shows an example of the present invention. 1 is an outdoor unit, and inside this outdoor unit 1, a first steam generator 2 and a second steam generator 2' of the same capacity are arranged side by side. 3 is a gas burner of the first steam generator 2;
3' is a gas burner of the second steam generator 2', 4, 4'
are gas valves attached to gas flow paths 5 and 5', respectively;
6, 6' are liquid level sensors for detecting the liquid level in the first and second steam generators 2, 2', and when the liquid level sensors 6, 6' detect the liquid level, the gas The valves 4, 4' are opened, and a circuit within the controller (not shown) is configured so that when one gas valve is opened, the other gas valve is simultaneously closed. 7 indicates an exhaust pipe.

8 is an indoor unit (radiator), 9 is a heat radiation coil built into this indoor unit 8, 1
0 is the inlet of the heat radiation coil 9, 11 is the outlet, 12 is the first steam pipe connecting the first steam generator 2 and the inlet 10 of the heat radiation coil 9, and 13 is the second steam generator 2' and the heat radiation coil. A second steam pipe 14 connects the outlet 11 of the steam pipe 9 to the outlet 11 of the steam pipe 9, and 14 represents a fan.

Next, the operation of the above embodiment will be explained.

First, when the first steam generator 2 side is ON and the second steam generator 2' side is OFF, the saturated steam generated in the first steam generator 2 flows through the first steam pipe 12 into the indoor unit 8. The vapor pressure flows into the heat dissipation coil 9 through the inlet 10. The steam entering the heat radiation coil 9 gives latent heat to the fluid sent from the fan 14 and condenses, and this condensed liquid flows from the outlet 11 of the heat radiation coil 9 to the second steam pipe 13.
It flows out into the steam generator 2' and accumulates in this second steam generator 2'.

In this way, heat transfer (heating) progresses, and the first
When the liquid level in the steam generator 2 decreases, the second
The liquid level of the condensate in the steam generator 2' rises, and eventually the liquid level sensor 6' detects the condensate.

When the liquid level sensor 6' detects the liquid level of the condensate,
An open signal is sent to the gas valve 4', and at the same time a close signal is sent to the gas valve 4.

When an open signal is sent to the gas valve 4', the gas burner 3' is ignited and saturated steam is generated in the second steam generator 2'. At the same time, gas burner 3
is closed, the first steam generator 2 side is cooled, and the first
The steam in the steam generator 2 is condensed and the inside becomes a vacuum state.

As a result, the condensate of steam generated in the second steam generator 2' reaches the heat radiation coil 9 via the second steam pipe 13, where it gives latent heat to the surrounding fluid and condenses. It flows into the first steam generator 2 side via the steam pipe 12 and accumulates there. When the liquid level of the condensate reaches the liquid level sensor 6, the liquid level sensor 6 sends an open signal to the gas valve 4 and a close signal to the gas valve 4'. Heat is transferred by repeating this process.

[Effects of the present invention] As described above, the present invention provides two steam generators, which are operated (heated) alternately to continuously generate steam, and the operation (heating) is stopped. The steam generator on the other side is used as a condensate reservoir.
Continuous heat transfer can be carried out in steam heat transfer devices. Furthermore, since the operation of the steam generator is controlled by a sensor and a controller without using a check valve, the operation is reliable and the manufacturing cost is low.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional intermittent steam type heat transfer device, and FIG. 2 is an explanatory diagram of a heat transfer device according to the present invention. 1... Outdoor unit, 2... First steam generator,
2'... Second steam generator, 3, 3'... Gas burner, 4, 4'... Gas valve, 6, 6'... Liquid level sensor, 8... Outdoor unit, 9... Heat radiation coil, 1
2...First steam pipe, 13...Second steam pipe, 14...
…Juan.

Claims (1)

[Scope of Claims] 1. A first steam generator and a second steam generator filled with working fluid are installed in an outdoor unit, and a liquid level sensor for detecting the upper level of the working fluid is installed in each steam generator. The first steam generator and the second steam generator are each equipped with a gas burner for heating, and the gas flow path leading to each gas burner is equipped with a gas valve. The inlet of the heat radiation tube on the radiator side and the first evaporator generator are connected by a first steam pipe, and the outlet of the heat dissipation tube and the second steam generator are connected by a second steam pipe, and from the sensor on the first steam generator side. In response to the signal, the gas valve on the first steam generator side is opened to ignite the gas burner, and upon receiving the signal from the liquid level sensor on the second steam generator side, the gas valve on the second steam generator side is opened. A steam generator comprising a controller that opens the gas valve to ignite the gas burner and closes the gas valve on the first steam generator side to alternately operate the first steam generator and the second steam generator. type heat transfer device.