JPS6343656B2 - - Google Patents

Description

Detailed Description of the Invention The present invention provides a heat transfer device that transports heat from a heat collector to a radiator by a phase change of a working fluid sealed in piping and a reflux action of the liquid due to gravity. This invention relates to a heat transfer device that is equipped with a device that generates heat or absorbs heat.

Conventionally, there has been a device of this type as shown in FIG. In the figure, 1 is a heat collector that receives heat from sunlight, and 2 is a heat radiator placed indoors, which is placed higher than the heat collector 1. A heat storage tank 3 is located at a height between the heat collector 1 and the heat radiator 2, and contains a heat exchanger 4 and a heat storage material 5 such as water. 6 is a liquid reservoir located at an intermediate height between the heat storage tank 3 and the radiator 2. 7A is a pipe that communicates the lower part of the heat radiator 2 and the liquid reservoir 6, and 7B is a pipe that communicates the lower part of the heat collector 1 and the liquid reservoir 6. A valve 8A is disposed in the middle of the pipe. There is. In addition, piping 7B
The side end of the liquid reservoir 6 projects from the inner bottom of the liquid reservoir 6 to a position LA shown in the drawing. 7C is a pipe that communicates the upper part of the heat collector 1 and the upper part of the radiator 2, and a part of it is a T-shaped pipe, and it is connected to the upper part of the heat exchanger 4 in the heat storage tank 3 through the pipe 7D. There is. 7E is a pipe that communicates a part of the pipe 7B between the heat collector 1 and the valve 8A with the lower part of the heat exchanger 4, and a valve 8B is disposed in the middle. 7F is a part of the pipe 7E between the heat exchanger 4 and the valve 8B and the liquid reservoir 6
It is a pipe that communicates with the lower part, and there is a valve 8C in the middle.
is installed. In the above configuration, the heat collector 1, radiator 2, heat exchanger 4, liquid reservoir 6, piping 7
A, 7B, 7C, 7D, E, and 7F are filled with a working fluid 9 such as fluorocarbon or water.
The amount depends on the height difference between the heat collector 1, the heat storage tank 3, and the liquid reservoir 6, but in normal cases, there is liquid in the heat collector 1, heat exchanger 4, and pipes 7B, 7E, and 7F. Fluid 9 (hereinafter referred to as liquid 9A, vapor-like working fluid 9 as steam 9
(The explanation will be continued as B) is satisfied.
In addition, the internal volume of the liquid reservoir 6 is the heat collector 1, the heat exchanger 4, the pipe 7E, the pipe 7B from the heat collector 1 to the valve 8A.
The section from valve 8C of pipe 7F to pipe 7E
The above-mentioned length LA is the length LA of the liquid reservoir 6.
The section from valve 8C of pipe 7F to pipe 7E
Calculate and determine the total internal volume of the section up to. 10 is a ventilation fan for sending the heat from the radiator 2 into the room.

Next, the operation will be explained. First, a case where heat is transported from the heat collector 1 to the heat storage tank 3 will be described. At this time, valves 8A and 8B are opened and valve 8C is closed. When sunlight hits the heat collector 1, the heat collector 1 is heated, and the liquid 9A inside it takes away the heat of evaporation and evaporates, and due to the slight pressure difference between the heat storage tank 3 and the heat exchanger 4, the heat collector 1 is heated. When it reaches the heat exchanger 4 from 7C through the pipe 7D and is cooled there by the heat storage material 5, the heat of condensation is released from the heat storage material 5 and liquefied. The liquid 9A liquefied in the heat exchanger 4 flows back to the heat collector 1 located at a lower position than the heat storage tank 3 through the pipes 7E and 7B due to the action of gravity. Heat is transferred from the heat collector 1 to the heat storage tank 3 by the circulation of the working fluid 9 as described above. In addition, at this time, the liquid reservoir 6
The LA section is full of liquid 9A,
Due to the amount of working fluid 9 sealed in the heat exchanger 4, no liquid 9A is accumulated therein.

Next, in order to transport heat from the heat storage tank 3 to the radiator 2 or from the heat collector 1 to the radiator 2, a valve 8B,
Open valve 8C and close valve 8A. In this state, the heat collector 1 and the heat exchanger 4 are filled with the liquid 9A. When the temperature of the heat collector 1 is higher than the temperature of the heat storage material 5, the working fluid 9 is transferred to the heat collector 1 based on the same principle as the heat is transferred from the heat collector 1 to the heat storage tank 3 described earlier. Heat from the heat collector 1 is transferred to the heat radiator 2 by circulating through the pipe 7C, the heat radiator 2, the pipe 7A, the liquid reservoir 6, the pipe 7F, and the pipes 7E and 7B. Further, when the temperature of the heat storage material 5 is higher than the temperature of the heat collector 1, the working fluid 9 is transferred from the heat exchanger 4 to the pipes 7D, 7C, the radiator 2, the pipe 7A, the liquid reservoir 6,
The heat in the heat storage tank 3 is transmitted to the radiator 2 by circulating through the pipes 7F and 7E.

Next, when the temperature of the heat storage material 5 is sufficiently high, in order to transport heat from the heat collector 1 to the heat radiator 2 without using the heat storage tank 3, the valve 8A is opened and the valves 8B and 8C are closed. In this state, the LA section between the heat collector 1 and the liquid reservoir 6 is filled with the liquid 9A. In this case as well, the working fluid 9 is transferred from the heat collector 1 to the pipe 7C, the heat radiator 2, the pipe 7A, and the liquid reservoir based on the same principle as the heat transfer from the heat collector 1 to the heat storage tank 3 described above. 6. Heat from the heat collector 1 is transferred to the radiator 2 by circulating through the pipe 7B. In this case, since the temperature of the heat storage material 5 is high, the steam 9B generated in the heat collector 1 does not flow to the heat storage tank 3, and since there is no liquid 9A in the heat exchanger 4, the liquid 9A is No evaporation,
The temperature of the heat storage material 5 is maintained without being taken away.

By repeating the above-described operations in sequence, it becomes possible to take the heat of sunlight indoors, temporarily store it, and take it out as needed to heat the room without using any power.

Since the conventional heat transfer device is configured as described above, for example, if the heat storage tank 3 is used to heat the room at night, the temperature of the heat storage material 5 will be low in the morning, and the heat will be reduced. There is a liquid 9A in the exchanger 4 and the heat collector 1.
becomes accumulated. This heating operation is stopped (the fan 10 is not moving and the radiator 2
When sunlight hits the heat collector 1 (even if steam 9B is present in increases to a pressure corresponding to the temperature of the collector 1 of the working fluid 9. That is, since the temperature of the heat collector 1 rises to the same level as when there is no working fluid 9 inside, there is a drawback that the pressure of the steam 9B becomes dangerously high.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it detects the temperature of the upper piping of the radiator, and automatically turns on the blower fan of the radiator when the temperature of this piping exceeds a predetermined temperature. By operating the system and blocking the piping for supplying liquid working fluid to the heat collector and heat storage tank, abnormal rises in steam pressure within the heat transfer device are prevented, providing a safe heat transfer device. It is intended to.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, 1 to 10 are the same as those of the conventional heat transfer device shown in FIG. 1, so their explanations will be omitted. Reference numeral 11 denotes a temperature detector installed in the upper piping of the radiator 2, and when this piping reaches a predetermined temperature or higher, the fan 10 operates and the valve 8 is activated.
A, 8B, and 8C are closed.

In this embodiment as well, the heat transport principle of the heat transfer device is similar to the conventional heat transport principle described above. The room is not heated (fan 10 is stopped), heat collector 1,
When sunlight hits the heat collector 1 while the heat exchanger 4 inside the heat storage tank 3 is filled with the liquid 9A, the heat collector 1 is heated and the liquid 9A inside it evaporates from the heat collector 1. It takes away the heat and becomes steam 9B, which flows into the pipes 7A, 7C,
7D, the radiator 2, and the liquid reservoir 6, but the fan 10 in the radiator 2 is not operating, and the heat exchanger 4 in the heat storage tank 3 is filled with liquid 9A, so steam It can hardly be condensed to 9B. As a result, the steam 9B pressure gradually increases. On the other hand, the temperature of the portion filled with the steam 9B is
If it is lower than the B temperature, the vapor 9B condenses and liquefies there and releases the heat of condensation to heat the area. However, the amount of steam 9B required for these heatings may be small, and the pressure of the steam 9B will gradually increase after all. However, in this way, when the temperature of the upper pipe of the radiator 2 becomes high, the temperature detector 11 is activated and the fan 10 is activated.
The radiator 2 is cooled by indoor air, and the steam 9B is condensed and liquefied within the radiator 2, and the internal pressure of the entire system can be lowered. Also, valve 8
Since A, 8B, and 8C are closed, the supply of liquid 9A to heat collector 1 and heat storage tank 3, which are the sources of steam 9B, is stopped, and the pressure in the system will not increase thereafter.
In other words, the temperature detector 11 plays an important role in preventing an abnormal internal pressure rise.

Next, another embodiment of the invention will be described with reference to the drawings. In FIG. 3, elements 1 to 10 are the same as those of the conventional heat transfer device in FIG. 1, so their explanations will be omitted. 12 is a temperature sensor provided on the upper pipe of the heat radiator 2, and 13 is a temperature sensor provided on the lower part of the heat exchanger 4. In the above configuration, when the temperature of the upper pipe of the radiator 2 reaches a predetermined temperature or higher, the fan 10 moves according to the instruction from the temperature detector 12, and the valves 8A and 8B open and the valve 8C closes. It continues to move until the temperature inside the tube at the bottom of the vessel 4 reaches another predetermined temperature or higher and an indication is given by the temperature detector 13.

In this embodiment as well, the heat transport principle of the heat transfer device is similar to the conventional heat transport principle described above.

If sunlight hits the heat collector 1 while both the heat collector 1 and the heat storage tank 3 are filled with the liquid 9A, the second
As explained in the example shown in the figure, the pressure in the system increases, but in this case, the valves 8A and 8B are opened and the valve 8C is closed, and the fan 10 moves according to the instructions from the temperature detector 12. Therefore, the liquid 9A that has entered the heat collector 1 turns into vapor 9B and then flows to the radiator 2, where it is condensed and liquefied and accumulated in the liquid reservoir 6. In this way, as the liquid 9A in the heat collector 1 decreases, the liquid 9A in the heat storage tank 3 flows into the heat collector 1 due to the action of gravity, so the liquid 9A in the heat storage tank 3 continues to decrease. . When there is no liquid 9A in the heat storage tank 3, the steam 9B from the heat collector 1 is transferred to the heat exchanger 4.
Since the temperature reaches the temperature sensor 13 provided at the bottom and is heated, the temperature sensor 13 is activated and stops the movement of the fan 10. At this time, the space between LA between the heat collector 1 and the liquid reservoir 6 is filled with the liquid 9A.
Since this is a condition for so-called heat storage operation, heat storage operation will be performed from now on. That is, the temperature detectors 12 and 13 not only prevent abnormal pressure rises, but also can automatically store solar heat when heating is not required.

As described above, according to the present invention, by providing a temperature detector in the upper piping of the radiator and the lower piping of the heat storage tank, when the pressure in the system exceeds a predetermined pressure, the air blower of the radiator The fan works automatically,
Since the pressure inside the system is lowered and heat can be stored in the heat storage tank, it has the effect of automatically preventing abnormal internal pressure and effectively utilizing solar heat.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing a conventional heat transfer device;
3 are configuration diagrams showing a heat transfer device according to one embodiment and another embodiment of the present invention. In the figure, 1 is a heat collector, 2 is a heat radiator, 3 is a heat storage tank,
4 is a heat exchanger, 5 is a heat storage material, 6 is a liquid reservoir, 7A,
7B, 7C, 7D, 7E, 7F are piping, 8A, 8
B, 8C are valves, 9, 9A, 9B are working fluids,
10 is a fan, and 11, 12, and 13 are temperature detectors. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A heat collector 1 that receives heat from sunlight or the like and vaporizes a working fluid, and has a heat exchanger 4 inside and a heat storage material 5 that exchanges heat with the heat exchanger. A heat storage tank 3 is located above the heat storage tank, and pipes 7C, which are located above the heat storage tank, carry the steam of the working fluid from the heat collector and the steam of the working fluid from the heat exchanger.
a radiator 2 for radiating the latent heat of the vapor of the working fluid, located between the heat storage tank and the radiator, and guiding the liquid working fluid from the radiator using piping; A liquid reservoir 6 for storing a certain amount of liquid, a first valve 8C provided in the middle of a pipe 7F connecting the liquid reservoir and the lower part of the heat exchanger to open and close the working fluid, and a first valve 8C for opening and closing the working fluid. One end of the piping that connects the lower part of the heat exchanger to the liquid reservoir is opened to the liquid reservoir by a height LA corresponding to the fixed amount to be stored, and the other end is opened to the liquid reservoir. A second valve 8A that is installed in the middle of the pipe 7B that connects the heater and opens and closes the working fluid, and a pipe that connects the lower part of the heat exchanger and the pipe between the second valve and the heat collector. 7E, a third valve 8B that opens and closes the working fluid; a fan 10 that guides the fluid that exchanges heat with the steam of the working fluid in the radiator to the radiator; A heat transfer device comprising a temperature detector that operates the stopped fan and closes the first, second, and third valves when the temperature exceeds a certain temperature corresponding to the dangerous pressure of the piping passing through the device. 2. It has a heat collector 1 that receives heat from sunlight and vaporizes a working fluid, has a heat exchanger 4 inside, and a heat storage material 5 that exchanges heat with the heat exchanger, and is located above the heat collector. A heat storage tank 3 is located above the heat storage tank, and is connected to piping 7C, which carries the steam of the working fluid from the heat collector and the steam of the working fluid from the heat exchanger.
a radiator 2 for radiating the latent heat of the vapor of the working fluid, located between the heat storage tank and the radiator, and guiding the liquid working fluid from the radiator using piping; A liquid reservoir 6 for storing a certain amount of liquid, a first valve 8C provided in the middle of a pipe 7F connecting the liquid reservoir and the lower part of the heat exchanger to open and close the working fluid, and a first valve 8C for opening and closing the working fluid. One end of the piping that connects the lower part of the heat exchanger to the liquid reservoir is opened to the liquid reservoir by a height LA corresponding to the fixed amount to be stored, and the other end is opened to the liquid reservoir. Provided in the middle of the pipe 7B connecting the heating device,
A second valve 8A that opens and closes the working fluid is provided in the middle of the pipe 7E that connects the lower part of the heat exchanger and the pipe between the second valve and the heat collector, and opens and closes the working fluid. a third valve 8B that conducts heat exchange with the steam of the working fluid in the radiator, a fan 10 that guides the fluid that exchanges heat with the vapor of the working fluid in the radiator, a constant pressure that is provided in the radiator and corresponds to the dangerous pressure of the piping that runs through the radiator. When the temperature exceeds the temperature, the stopped fan is operated and the first valve is closed;
A first temperature sensor 12 for opening the second and third valves is installed in the heat exchanger, and after the first temperature sensor is activated, the working fluid in the heat exchanger runs out; A heat transfer device comprising a second temperature detector that detects a temperature rise in the heat exchanger due to heating caused by flowing working fluid vapor and stops the fan.