JPS62119365A - Heat transfer device of heat drive type - Google Patents

Abstract

PURPOSE:To make it unnecessary to use a mechanically movable section except a check valve and improve durability and reliability of titled device by utilizing siphon action and head difference due to the difference in liquid levels to circulate intermittently a heat carrier to transfer heat. CONSTITUTION:A low temperature side tank 13 is provided at a position higher than a high temperature side tank 12 which stores a heat carrier liquid and evaporates it by means of a solar heat collecting device 11, and a heat exchanger 18 is provided at a position lower than the tank 12. The heat carrier liquid of the tank 12 is led to the tank 13 through the heat exchanger 18, using an up-flow pipe 16, and the heat carrier liquid of the tank 13 is led to the tank 12 through a check valve 14, using a return flow pipe 15. The steam layers in the tanks 12 and 13 are connected through a connecting pipe 20 which has a section 20A bent downwards at the side of the tank 12, and an auxiliary tank 21 mounted on the bend section 20A of the connecting pipe 20 and the upper section of the tank 12 are connected. With this arrangement durability and reliability of the device can be improved a great deal.

Description

[Detailed description of the invention] (a) Industrial application field This invention is used in solar heat collection devices, heating devices, etc.
The present invention relates to a heat-driven heat transfer device that circulates a heat medium liquid using the energy of the heat to be transferred without using a dynamic pump.

(b) Conventional technology This type of heat-driven heat transfer device is disclosed in Japanese Patent Application Laid-Open No. 60-133.
The one disclosed in Japanese Patent No. 264 is known. As shown in the fifth factor, there is a high-temperature side tank 2 that stores a heat medium liquid and evaporates it using a heating bag [1] such as a solar heat collector, and a high-temperature side tank 2 that A low-temperature side tank 3 is arranged at a higher position than the high-temperature side tank 2, and a heat exchanger 5 is housed in a heat storage tank 4 which is arranged at a lower position than the high-temperature side tank 2. A lift pipe 6 that guides the heat medium liquid in the side tank 2 to the low temperature side tank 3, a reflux pipe 8 that leads the heat medium liquid in the low temperature side tank 3 to the high temperature side tank 2 via the check valve 7, and both tanks 2. Equipped with a communication pipe 9 that communicates the steam layer of .3P'3, and an on-off valve 10 that opens the communication pipe 9 only when the liquid level in the high temperature side tank 2 is low and equalizes the pressure in both tanks 2.3. It is the composition.

When the high temperature side tank 2 is filled with heat medium liquid, the on-off valve 10
by closing the tank, evaporating the heat transfer liquid with the heating device 1, and increasing the pressure in the high temperature side tank 2.

The heat medium liquid in the high-temperature side tank 2 is moved to the low-temperature side tank 3 via the uplift pipe 6, and the water and the like in the heat storage tank 4 are heated by the heat exchanger 5. In addition, by opening the on-off valve 10 when the liquid level in the high-temperature side tank 2 is low and equalizing the pressure inside the single-car tank 2.3, the heat transfer liquid is transferred from the low-temperature side tank 3, which has a high liquid level, to the high-temperature side tank 2. I'm trying to get it back.

The conventional device described above moves the heat medium liquid upward by the pressure difference of steam and returns it to its original position by the action of gravity.The heat medium liquid is circulated by the added heat itself, so an electric pump It has the advantage of not only being able to achieve a significant weight reduction, but also eliminating the need for electricity and the cost of heat transfer.

pi The problem that the invention seeks to solveHowever,
The above-mentioned conventional IT is intended to improve the response to repeated pumping and reflux of the heat transfer fluid, shorten the response time, and increase the number of pumping cycles.

It is necessary to use an on-off valve with a complicated structure, and the durability and
It had the drawback of poor reliability. This also hindered its practical application.

This invention was made in view of the above-mentioned facts, and aims to improve the durability and reliability of the device by minimizing the number of mechanically movable parts such as on-off valves.

B) Means for Solving the Problems In order to achieve the above object, the present invention includes a high-temperature side tank that stores a heat medium liquid and evaporates the heat medium liquid using a heating device, and a high-temperature side tank that stores a heat medium liquid and evaporates the heat medium liquid using a heating device. A low-temperature side tank is installed at a higher position than the high-temperature side tank, and a heat exchanger is installed at a lower position than the high-temperature side tank. a lift pipe that guides the heat medium liquid from the low-temperature side tank to the high-temperature side tank via a reverse valve;
A communication pipe that communicates the vapor layers in both tanks and has a downwardly bent part on the side of the high temperature side tank, an auxiliary tank installed at the bent part of this communication pipe, and this auxiliary tank and the above. The structure includes a siphon pipe that communicates with the upper part of the high temperature side tank.

(E) Effect In this invention, when there is no heat medium liquid in the auxiliary tank, connecting pipe, and siphon pipe, the pressure in the high temperature side tank and the low temperature side tank becomes equal, and the heat medium liquid is increased due to the head difference in the liquid level of both tanks. The heat transfer liquid flows back from the low-temperature side tank to the high-temperature side tank, and also enters the auxiliary tank via the siphon pipe. after that.

When the heat medium liquid in the high-temperature side tank is heated by the heating device and evaporated, the liquid level in the communication pipe increases as the pressure in the high-temperature side tank increases. Also.

When the pressure in the high-temperature tank becomes sufficiently higher than that in the low-temperature tank, the heat medium liquid in the high-temperature tank moves to the low-temperature tank via an uplift pipe equipped with a heat exchanger. As a result, when the liquid level in the high-temperature side tank becomes lower than the opening height of the siphon tube, the heat transfer liquid no longer moves from the high-temperature side tank to the auxiliary tank. Thereafter, when the pressure in the high-temperature side tank further increases, the heat medium liquid is moved in the lift pipe, and the heat medium liquid in the auxiliary tank is transferred to the low-temperature side tank via the communication pipe. When the heat medium liquid in the auxiliary tank runs out in this way, the steam in the high temperature side tank moves to the low temperature side tank via the communication pipe, and the pressure in both tanks becomes equal. For this reason, due to the head difference in the liquid level of both tanks,
The heat transfer liquid flows back from the low-temperature side tank to the high-temperature side tank. By repeating the above steps, the heat of the heating device is intermittently transferred to the heat exchanger.

(F) Embodiments The present invention will be described in detail below based on embodiments shown in the drawings.

FIGS. 1 and 2 show an embodiment of the present invention. In these figures, 11 is a solar heat collector as a heating device, 12 is a high temperature side tank that is disposed at a higher position than the heat collector 11 and whose lower end is connected to the upper end of the heat collector 11, and 13 A low temperature side tank 16 is disposed at a higher position than the high temperature side tank 12 and is connected to the lower end of the heat collector 11 via a reflux pipe 15 having a check valve 14 at its lower end.
is a lift pipe that communicates the lower end of the high-temperature side tank 12 with the steam layer 13A in the low-temperature side tank 13;
is equipped with a check valve 17 and a heat exchanger 18, and the heat exchanger 18 is housed in a heat storage tank 19. Reference numeral 20 connects the upper end of the high temperature side tank 12 and the upper end of the low temperature side tank 13 to form vapor layers 12A, 13 inside both tanks 12.13.
It is a communication pipe that communicates with A, and has a portion 20A that is bent downward on the side of the high temperature side tank 12.

Reference numeral 21 indicates an auxiliary tank installed at the bending portion 2OA of the communication pipe 20, and 22 indicates a siphon pipe that communicates the auxiliary tank 21 with the upper part of the high temperature side tank 12. High temperature side tank 1
2. The low temperature side tank 13, the communication f20 equipped with the auxiliary tank 21, and the siphon pipe 22 are housed in a housing 23, and the housing 23 and the heat collector 11 are installed on the roof 25 of a building 24. Further, a heat storage tank 19 containing a heat exchanger 18 is installed at a low place such as under 240 buildings.

Note that the heating medium liquid filled in the high-1 side tank 12 and the low-temperature side tank 13 is a fluorocarbon refrigerant (for example, R-1
14) etc. are used.

Next, the operation of the above-described embodiment device will be explained.

■ Auxiliary tank 21, communication pipe 20 and siphon pipe 2
Assuming that there is no heat transfer liquid in tank 2 and that these are filled with gas, the pressure inside the high temperature side tank 12 and the low temperature side tank 13 is equalized. Therefore, due to the head difference between the liquid levels of both tanks 12 and 13, the heat medium liquid in the low temperature side tank 13 passes through the reflux pipe 15 and the heat collector 11 to the high temperature side tank 12.
Move to.

■ The liquid level of the high-temperature side tank 12 is the same as that of the siphon tube 22.
When the height of the top of the temperature rises above (X-X line), a part of the heat transfer liquid in the high temperature side tank 12 moves to the auxiliary tank 21 through the siphon pipe 22.

(2) When the heat collector 11 receives solar radiation, the heat medium liquid in the heat collector 11 evaporates and moves to the high temperature side tank 12, so that the pressure in the high temperature side tank 12 increases.

(2) As the pressure of the high temperature side tank 12FF3 increases, the heat medium liquid in the auxiliary tank 21 rises through the communication pipe 20V3. The liquid level in the communication pipe 20 is balanced at a position relative to the pressure bonds in the high temperature side tank 12 and the low temperature side tank 13.

■ When the pressure in the high temperature side tank 12 becomes sufficiently higher than the pressure in the low temperature side tank 13, the heat medium liquid in the high temperature side tank 12 flows through the lift pipe 16 equipped with the check valve 1γ and the heat exchanger 18. and then moves to the low temperature side tank 13.

■ As a result, when the liquid level in the high temperature side tank 12 becomes lower than the opening height of the siphon tube 22 (Y-Yi),
The heat medium liquid in the siphon tube 22 is drained and falls into the auxiliary tank 21 or the high temperature side tank 12, and the liquid does not move from the high temperature side tank 12 to the auxiliary tank 21.

■ Furthermore, when the pressure inside the high temperature side tank 12 increases,
As the heat medium liquid moves from the high temperature side tank 12 to the low temperature side tank 13, the liquid level in the communication pipe 20 rises, and the heat medium liquid in the auxiliary tank 21 moves to the low temperature side tank 13.

(2) When the heat medium liquid in the auxiliary tank 21 and the communication pipe 20 is used up, the gas in the high temperature side tank 12 passes through the communication pipe 20 and moves to the low temperature side tank 13.

Since the volumetric flow rate of the gas is larger than that of the liquid, the pressures in the high-temperature side tank 12 and the low-temperature side tank 13 quickly become equal.

(2) As a result, the heat medium liquid in the low-temperature side tank 13 flows back to the high-temperature side tank 12 due to the head difference due to the difference in liquid level in both tanks 12,13.

By repeating the above steps, the solar heat collected by the heat collector 11 is intermittently conveyed to the heat exchanger 18 and used to heat the water in the heat storage tank 19.

This embodiment uses a siphon action and a head difference due to a difference in liquid level to circulate the heat medium liquid instead of the conventional on-off valve.

There are no mechanically moving parts other than the check valve 14.1T.

The durability and reliability of the device can be improved.

In addition, are the check valves 14.1r both for backflow prevention?
The reverse valve 1γ can be omitted.

FIG. 3 shows another embodiment of the invention,
Components common to those shown in FIG. 1 are given the same reference numerals. In FIG. 3, the difference from that in FIG.
0 and both ends thereof are connected to the lower part of the high temperature side tank 12. The operation of the embodiment shown in FIG. 3 is the same as that shown in FIG. 1, so the explanation thereof will be omitted.

Although the above-described embodiment device uses the solar heat collector 11 as a heating device, the heating device may be a heat source such as a heater or a burner, and the heating device may be built into the high-temperature side tank 12 or the high-temperature side tank 12 itself may be used as a heating device. It may also be possible to collect solar heat. Further, when the rising height between the bent portion 20A and the low temperature side tank 13 cannot be sufficiently secured, the communication pipe 20 may be formed into a meandering shape as shown in FIG. 4.

(g) Effects of the invention This invention is configured as described above.

Heat transfer can be carried out by intermittently circulating the heat transfer liquid using the siphon effect and head differences due to differences in liquid level, eliminating the need for mechanical moving parts other than check valves.
This can significantly improve the durability and reliability of the device, and can contribute to the spread of heat-driven heat transfer devices that require no electricity and no transportation costs.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a system diagram of a thermally driven heat transfer device showing an embodiment of the present invention, Fig. 2 is an explanatory drawing showing the installation state, and Fig. 3 is an explanatory diagram showing the installed state.
FIG. 4 is a system diagram of a device according to another embodiment of the present invention, FIG. 4 is a piping diagram showing a modification of the communication pipe, and FIG. 5 is a system diagram showing an example of a conventional device. 11...Solar heat collector, 12...High temperature side tank,
13... Low temperature side tank, 14... Check valve, 15...
... Reflux pipe, 16... Uplift pipe, 18... Heat exchanger, 20... Communication pipe, 20A... Bent part, 21
...Auxiliary tank, 22...Siphon tube. Applicant Sanyo Electric Co., Ltd. and 1 other agent Patent attorney Makoto Sano Quiver 1 Figure 2 Figure 5

Claims (1)

[Claims] (1) A high-temperature side tank that stores heat transfer fluid and evaporates the heat transfer fluid using a heating device, a low-temperature tank that is located higher than the high-temperature tank, and a lower temperature tank that is located higher than the high-temperature tank. A heat exchanger installed at a low position, a lifting pipe that leads the heat medium liquid from the high temperature side tank to the low temperature side tank through the heat exchanger, and a lift pipe that leads the heat medium liquid from the low temperature side tank to the low temperature side tank through a check valve. A reflux pipe that leads to the high-temperature side tank, a communication pipe that communicates the vapor layers in both tanks and has a downwardly bent portion on the side of the high-temperature side tank, and a communication pipe that is installed at the bent part of the communication pipe. 1. A thermally driven heat transfer device comprising: an auxiliary tank with a high temperature side; and a siphon pipe that communicates the auxiliary tank with the upper part of the high temperature side tank.