JPH0697148B2 - Heat carrier - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat transfer device that is used in a cooling and heating hot water supply device, an exhaust heat recovery device, a solar heat utilization device, and the like, and uses a latent heat medium as a working liquid.

2. Description of the Related Art A conventional heat transfer device of this type is configured as shown in FIG.

Liquid reservoir tank 3 containing float 2 above generator 1
Is provided, and the vapor introducing section 4 is provided above the liquid storage tank 3,
A first opening / closing valve 6 that is in contact with the upper portion of the float 2 and opens and closes the connection port 5 between the liquid reservoir tank 3 and the steam introducing portion 4 by its vertical movement is internally provided in the steam introducing portion 4. The upper part of the generator 1 is connected to the steam introduction part 4 by a communication pipe 7, and the heat exchanger 8
Is connected to the upper part of the forward pipe 9. The lower part of the liquid storage tank 3 is connected to the lower part of the generator 1 and a return pipe 11 provided with a check valve 10A in the middle thereof, and to the lower part of the heat exchanger 8 in the middle thereof.
B is connected by a return pipe 12 provided. The hydraulic fluid 13 in the liquid storage tank 3 causes buoyancy in the float 2, and the vertical movement of the float 2 controls the opening / closing of the first opening / closing valve 6.

The pressure in the liquid storage tank 3 is controlled by the first opening / closing valve 6, and the working liquid 13 is pressure-fed from the generator 1 to the heat exchanger 8 and heat is transferred.

Problems to be Solved by the Invention However, in the above-described configuration, the temperature of the outgoing pipe 9, the heat exchanger 8 and the like becomes lower than that of the generator 1 immediately after the heat transfer operation is stopped, so that the working fluid 13 accumulates and the generator is generated. Since there is no hydraulic fluid 13 in 1 so that the pressure of the generator 1 does not rise even if the operation is restarted, the hydraulic fluid 13 cannot be pumped and cannot be started as a heat transfer device. Had.

The present invention solves such a conventional problem, and an object of the present invention is to make it possible to always start the heat transfer device even in a state where the generator does not have hydraulic fluid.

Means for Solving the Problems In order to solve the above problems, the heat transfer device of the present invention is provided with a second opening / closing valve on the return pipe and a heater for heating the latent heat medium in the heat exchanger. It is a thing.

Operation The present invention has the above-described configuration, and when the heat transfer operation is stopped, the second opening / closing valve is closed to store the working fluid in the heat exchanger, and at the start of the heat transfer operation, the heat exchanger is heated by the heater to operate. By evaporating the liquid to a high pressure, the working liquid accumulated in the forward pipe and heat exchanger is injected into the generator,
When the generator is heated, the working liquid boils and evaporates, the pressure inside the generator is increased, the working liquid is pumped to the heat exchanger, and the heat is transferred from the generator to the heat exchanger.

Embodiment An embodiment of the present invention will be described below with reference to FIG. The same members having the same functions as those in FIG. 2 are designated by the same reference numerals and the description thereof is omitted.

A second opening / closing valve 14 is provided on the return pipe 12, and a heater 15 such as a heater for heating the working fluid 13 inside the heat exchanger 8 is provided in the heat exchanger 8.

When the heat transfer operation is started, the heat exchanger 8 is heated by the heater 15 and the working fluid 13 is evaporated to a high pressure. Second on-off valve 14
Is closed, the vaporized working fluid 13 vaporizes the hydraulic fluid 13 in the heat exchanger 8 and the outward pipe 9 to the generator 1. When the working fluid 13 is injected into the generator 1, the second opening / closing valve 14 is opened and the operation of the heater 15 is stopped, so that the heat exchanger 8 is no longer heated.

When the working fluid 13 is heated in the generator 1, the working fluid 13 evaporates by boiling to raise the pressure in the generator 1, so that the vapor of the working fluid 13 passes from the upper part of the generator 1 to the heat exchanger 8 through the forward pipe 9. It is sent in and radiates heat to be condensed and liquefied, and the liquid of the working liquid 13 is sent to the liquid reservoir tank 3 through the return pipe to raise the liquid level of the working liquid 13.
When the first opening / closing valve 6 is pushed upward by the buoyancy of the float 3, the high-pressure working fluid 13 vapor is introduced from the vapor introducing section 4, and the pressure in the liquid reservoir tank 3 and the pressure of the generator 1 become equal, The hydraulic fluid 13 in the liquid storage tank 3 is collected in the generator 1 by the action of gravity. When the float 2 is lowered and the first opening / closing valve 6 is closed as the liquid level of the working liquid 13 in the liquid storage tank 3 is lowered, the collection of the working liquid 13 is completed.

As described above, in the above embodiment, when the heat transfer operation is started, the working fluid 13 in the heat exchanger 8 is heated by the heater 15 to generate the working fluid 13 accumulated in the heat exchanger 8 and the outward pipe 9. Since the generator 1 is heated after being collected in the container 1, it can always be started as a heat transfer device.

Effects of the Invention As described above, the heat transfer device of the present invention has the following effects.

(1) Since the second on-off valve is provided on the return pipe and the heater for heating the latent heat medium in the heat exchanger is provided, when the heat transfer operation is started, the working fluid accumulated in the heat exchanger and the forward pipe is generated. Since it can be collected in a container, it can always be activated as a heat transfer device.

(2) By closing the second on-off valve, it is possible to stop the circulation of the working fluid from the generator to the heat exchanger and stop the heat transfer.

[Brief description of drawings]

FIG. 1 is a block diagram of a heat transfer device according to an embodiment of the present invention, and FIG.
The figure is a block diagram of a conventional heat transfer device. 1 ... Generator, 3 ... Liquid storage tank, 7 ... Communication pipe, 8
...... Heat exchanger, 9 …… Forward, 11 …… Return, 12 …… Return,
14 …… Second opening / closing valve, 15 …… Heating device.

Claims (1)

[Claims] 1. A generator in which a working liquid of a latent heat medium is introduced to generate steam thereof, a liquid reservoir tank located above the generator, a heat exchanger for cooling the working liquid, and an upper portion of the generator. A connecting pipe that connects the upper part of the liquid storage tank and is provided with a first on-off valve in the middle, a forward pipe that connects the upper part of the generator and the upper part of the heat exchanger, a lower part of the liquid storage tank and a lower part of the generator. A return pipe that is connected and provided with a check valve in the middle, a return pipe that connects the liquid storage tank and the lower portion of the heat exchanger, a second opening / closing valve provided on the return pipe, and the heat exchanger A heat transfer device comprising a heater for heating the latent heat medium inside.