JPH0377438B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a method for transferring heat from above without power in devices having a heat transfer function, such as solar water heaters, waste heat recovery devices, central heating, etc. This relates to a heat transfer device that moves the heat downward.

Structure of Conventional Example and Its Problems Heat pipes are well known as conventional non-powered heat transfer devices, and have been incorporated and used in solar water heaters, waste heat recovery devices, and the like. but,
Most of the heat pipes used in the above-mentioned devices are gravity type, in which the reflux of condensate is carried out by gravity, so that the upper part is cooled and the lower part is heated. In other words, the system transports heat from below upwards, and there are restrictions on the direction of transport. As a means of alleviating this constraint, a method was used in which a wick was installed on the inner wall of the heat pipe and the condensate was transported to the upper heating section by capillary action, but at the same time the equipment became expensive and the , in the case of bottom cooling, the amount of heat transfer decreases significantly.

On the other hand, as shown in Fig. 2, the working fluid is heated and evaporated by the solar heat collector 14, which is a generator of high heat source, and the internal pressure of the first fluid storage tank 15 provided at the top is increased. The working medium is pushed into the heat exchanger 17 in the installed hot water storage tank 16, and the cooled working fluid is stored in the second liquid storage tank 18 provided above. When a certain amount is reached, the solar heat collector is activated by gravity. A device has been proposed in which heat is transported from an upper high heat source to a lower low heat source without power by refluxing the heat to the lower part of the tube 14 and heating and evaporating it again. However, this requires two liquid storage tanks, the piping becomes complicated, and the entire device becomes expensive.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned problems, conveys the heat from above to the bottom with a simple structure, and improves the heat exchange performance.

Structure of the Invention The present invention utilizes the increase in internal pressure in the generator to transport high-temperature working fluid in the generator directly from the lower part of the generator to a heat exchanger for heat radiation, and transfers the cooled working fluid to a fluid reservoir. The working fluid is stored in a tank and when a certain amount is reached, it is returned to the upper part of the generator by gravity, and a simple piping configuration with one fluid storage tank is realized.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, 1 is a generator, and check valve 2
It is connected to a heat exchanger 4 installed inside the hot water tank 3 via piping a. 5 is water storage. Reference numeral 6 denotes a liquid storage tank connected to the heat exchanger 4 and installed above the generator 1. Inside there is a valve 8 that opens and closes by the vertical movement of a float 7, which is a means for detecting the liquid level. When the liquid level of the liquid 9 does not reach the float 7, the pressure intake port 8 is closed by the weight of the spring 10 and the float 7. A connection port 11 connected to the pressure inlet 8 and a pressure outlet 12 located at the upper part of the generator 1 are connected by a communication pipe 13.
On the other hand, the upper part of the generator 1 and the lower part of the liquid reservoir tank 6 are connected via piping via a check valve 2b.

In the above configuration, the generator 1 actually corresponds to a solar collector or boiler, which absorbs heat and
The internal working fluid 9 is heated and evaporated. On the other hand, at the start of heating, the hydraulic fluid 9 is not stored in the fluid reservoir tank 6, so the valve 8 is closed by the weight of the spring 10 and the float 7. Therefore,
When the working fluid 9 evaporates inside the generator 1, the pressure inside the generator 1 increases, and the heated working fluid 9 flows into the generator 1.
The working fluid 9 flows into the heat exchanger 4 through the check valve 2a from the lower part of the hot water storage tank 3, radiates heat in the hot water storage tank 3, and is cooled.The working fluid 9 flows into the liquid storage tank 6. Furthermore, as evaporation in the generator 1 continues, the level of the working fluid 9 in the fluid reservoir tank 6 rises, eventually pushing up the float 7 and opening the valve 8. As a result, the generator 1 and the liquid reservoir tank 6 are brought into communication via the communication pipe 13, the pressure inside the generator 1 is introduced into the liquid reservoir tank 6, and the hydraulic fluid 9 in the liquid reservoir tank 6 is is passed through the check valve 2b by its own weight, and the generator 1
It is dropped into. The working fluid 9 is heated and evaporated again in the generator 1, and by repeating the same operation, the heat added to the generator 1, which is a high heat source installed above, is transferred to the hot water storage installed below. It is transported to the tank 3 via the heat exchanger 4.

As explained above, according to this embodiment, by providing the liquid reservoir tank 6 above the generator 1 via the check valve 2b, the hydraulic fluid 9 can be directly conveyed from the lower part of the generator 1 to the heat exchanger 4 via the check valve 2a. Furthermore, the cooled working fluid 9 is directly
Since it is stored in the liquid reservoir tank 6, the working fluid 9 can be refluxed using only one liquid reservoir tank 6. Also, the float 7 provided inside the liquid reservoir tank 6 detects that the amount of the working fluid 9 in the liquid reservoir tank 6 has reached a constant value, and opens the valve 8. Connecting port 11 provided in
3, the pressure of the generator 1 can be taken into the liquid reservoir tank 6, and the hydraulic fluid 9
can be refluxed from the upper part of the generator 1.
This causes the hydraulic fluid 9 in the upper part of the generator 1 to
Since the gas and the cooled working fluid 9 can be brought into direct contact and heat exchanged, the heat exchange performance can be improved.

Effects of the Invention The present invention has a simple structure and is non-powered, since a liquid storage tank is provided above the generator via a check valve to send hydraulic fluid to the generator according to the amount of internal hydraulic fluid. , it is possible to transport the heat from above downward, and at the same time, it is possible to bring the high-temperature gas into direct contact with the cooling liquid in the generator, so that the heat exchange performance can be improved. In addition, the liquid storage tank is equipped with a liquid level detection means that communicates with the upper part of the evaporation generator when the liquid level of the working liquid exceeds a certain height.
There is less turbulence in the liquid level, the liquid level can be reliably detected and the liquid can be returned to the evaporation generator, and it is also possible to use devices that do not use electricity, such as a float valve.

[Brief explanation of drawings]

Figure 1 is a system diagram of one embodiment of the present invention, Figure 2 is a system diagram of an embodiment of the present invention.
The figure is a conventional system diagram. 1... Generator, 2a, 2b... Check valve, 4...
Heat exchanger, 6...Liquid reservoir tank, 7...Float, 8...Valve, 9...Working fluid, 11...Connection port,
12...Pressure outlet, 13...Communication pipe.

Claims (1)

[Claims] 1 an evaporation generator; a heat exchanger for heat radiation connected via a check valve to a lower part of the evaporation generator;
A lower liquid storage space of a liquid storage tank provided above the evaporation generator and having an internal space divided into two vertically is connected to the outlet side of the heat radiating heat exchanger through piping, and the liquid storage tank The bottom of the tank and the top of the evaporation generator are connected by piping via a check valve, and the upper space of the liquid storage tank and the top of the evaporation generator are connected by a communicating pipe to connect the bottom of the liquid storage tank to the top of the evaporation generator. The upper and lower space partitions in the tank are always closed, and are opened when the working fluid has accumulated in the liquid storage tank to a certain height or higher, and the evaporation generator and the liquid storage tank are communicated through the communication pipe. In a sealed circuit configured with a valve body having a liquid reservoir detection means,
A heat transfer device filled with evaporative working fluid.