JPH0246860B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a non-powered heat transfer device used in solar water heaters, exhaust heat recovery devices, air conditioners, and the like.

Configuration of Conventional Example and Its Problems A conventional heat transfer device of this type was configured as shown in FIG. A heat exchange tank 2 storing hot water is arranged below a collector 1 (generator) consisting of a plurality of heat collecting pipes, and a check valve 4a is installed between the heat exchanger 3 housed in the tank 2 and the collector 1. They are connected by an outgoing pipe 5 provided with a. A liquid reservoir tank 7 in which a liquid level detection sensor 6 is housed is arranged above the collector 1, and the heat exchanger 3 is connected to a return pipe 8.
It is connected to the collector 1 by a return pipe 9 having a check valve 4b in the middle, and an on-off valve 10 (valve mechanism) is connected to the upper part of the liquid reservoir tank 7 and the upper part of the collector 1 in the middle. They are connected through a communication pipe 11 provided. The liquid level of the hydraulic fluid 12 is controlled by a controller 13 that opens the on-off valve 10 when the liquid level of the hydraulic fluid 12 detected by the liquid level detection sensor 6 becomes larger than a set value H.

The working fluid 12 boils and evaporates when the collector 1 is heated by sunlight, and by increasing the pressure inside the collector 1, the heated working fluid 12 passes through the outgoing pipe 5 and is pushed into the heat exchanger 3, and is transferred to the heat exchange tank. The working fluid 12 that has been cooled by exchanging heat with the hot water in the tank 2 is sent to the liquid storage tank 7 through the return pipe 8, and the level of the working fluid 12 in the liquid storage tank 7 gradually rises. go. When the liquid level of the hydraulic fluid 12 detected by the liquid level detection sensor 6 becomes larger than the set value H, the controller 1
3, the on-off valve 10 is opened and the collector 1 is opened.
The upper part of the collector tank 7 and the upper part of the liquid reservoir tank 7 are communicated with each other by a communication pipe 11, and the pressure inside the collector 1 is guided to the liquid reservoir tank 7.
is collected into the collector 1 through the return pipe 9. When the level of the hydraulic fluid 12 decreases and becomes smaller than the set value H, the controller 13 closes the on-off valve 10 and the collection of the hydraulic fluid 12 to the collector 1 is completed.

In this configuration, the working fluid 12 heated in the collector 1 exchanges heat with hot water in the heat exchanger 3, is cooled, and flows through the return pipe 8 from the bottom of the fluid reservoir tank 7. is the communication pipe 11 from the upper part of the collector 1 when the hydraulic fluid 12 is collected into the collector 1.
The high-temperature vapor of the working fluid 12 that was guided through the tank 7 remains, and as the working fluid 12 flows from the bottom of the reservoir tank 7, the vapor of the working fluid 12 is compressed and the pressure inside the reservoir tank 7 becomes high. , the working fluid 12 becomes difficult to flow from the collector 1 to the liquid storage tank 7 through the heat exchanger 3, the circulation flow rate of the working fluid 12 decreases, and the heat transfer performance and heat collection performance from the collector 1 to the heat exchanger 3 are reduced. A problem arose when the value decreased.

OBJECT OF THE INVENTION The present invention solves the above-mentioned conventional problems by preventing the compression of the vapor of the hydraulic fluid in the reservoir tank and increasing the circulating flow rate of the hydraulic fluid.
The purpose is to improve heat transfer performance.

Composition of the Invention In order to achieve the above object, the present invention has a pipe end opening of a return pipe connecting a liquid storage tank and a heat exchanger located upward near the upper wall surface of the liquid storage tank,
A diffusion portion for diffusing the working fluid is provided on the upper wall surface of the liquid reservoir tank near the pipe end opening of the return pipe.

With this configuration, when the valve mechanism is in the closed state, the working fluid that has been cooled by exchanging heat with the heat exchanger passes through the return pipe and exits from the pipe end opening of the return pipe that is installed upward near the upper wall of the liquid storage tank. The working fluid discharged into the liquid storage tank is diffused by the diffusion section installed on the upper wall of the liquid storage tank near the end opening of the return pipe, and the vapor of the working liquid in the liquid storage tank is stirred and cooled. The liquid is condensed and the pressure inside the liquid storage tank is lowered, increasing the pressure difference between the generator and the liquid storage tank and increasing the circulation flow rate of the working liquid.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The same members as in FIG. 2 are given the same numbers and their explanations are omitted. The heat exchanger 3 and the liquid storage tank 7 are connected by the return pipe 8, and the pipe end opening 14 of the return pipe 8 is connected to the heat exchanger 3 and the liquid storage tank 7.
is provided facing upward near the upper wall surface of the liquid reservoir tank 7, and a diffusion section 15 is provided on the upper wall surface of the liquid reservoir tank 7 near the tube end opening 14. A steam tank 16 is provided above the liquid reservoir tank 7 , and the lower part of the steam tank 16 and the upper part of the liquid reservoir tank 7 are connected by an on-off valve 10 (valve mechanism) whose opening and closing are controlled by the liquid level detection sensor 6 .

When the collector 1 is heated by solar radiation, the working fluid 12 boils and evaporates, increasing the pressure inside the collector 1, pushing out the heated working fluid 12, sending it under pressure to the heat exchanger 3 through the outgoing pipe 5, and transferring it to the heat exchange tank. Heat is radiated to the hot water in 2 to cool it, and it passes through return pipe 8 to liquid storage tank 7.
Pipe end opening 1 provided upward near the upper wall surface
The hydraulic fluid 12 discharged from 4 into the fluid reservoir tank 7
is the diffusion section 1 provided on the upper wall of the liquid reservoir tank.
The liquid collides with the liquid reservoir tank 7 and is diffused, mixes violently with the vapor of the working fluid 12, cools and condenses the vapor, and lowers the pressure inside the liquid storage tank 7. When the pressure inside the liquid reservoir tank 7 decreases and the pressure difference with the collector 1 increases, the circulation flow rate of the working fluid 12 from the collector 1 to the heat exchanger 3 and the liquid reservoir tank 7 increases, and the heat collection in the collector 1 increases. The temperature is lowered to improve the heat collection efficiency, and the flow rate of the working fluid 12 in the heat exchanger 3 is increased to improve the heat exchange capacity.

The amount of hydraulic fluid 12 flowing into the fluid reservoir tank 7 increases and the hydraulic fluid 12 is detected by the fluid level detection sensor 6.
When the liquid level becomes larger than the set value H, the on-off valve 10
(valve mechanism) is opened, the upper part of the collector 1 and the upper part of the liquid reservoir tank 7 are communicated through the communication pipe 11, and the working fluid 12 in the liquid reservoir tank 7 is transferred to the collector 1 through the return pipe 9. It will be collected. Liquid reservoir tank 7
When the level of the hydraulic fluid 12 in the collector 1 decreases and becomes smaller than the set value H, the fluid level detection sensor 6 closes the on-off valve and the collection of the hydraulic fluid 12 to the collector 1 is completed.

In the above embodiment, the working fluid 12 discharged into the liquid reservoir tank 7 from the pipe end opening 14 of the return pipe 8 is caused to collide with the diffusion section 15 provided on the upper wall surface of the liquid reservoir tank 7 and to be diffused. and hydraulic fluid 12
The steam is stirred, cooled, and condensed to reduce the pressure inside the liquid storage tank. As a result, the pressure difference between the generator and the liquid storage tank can be increased, the circulation flow rate of the working fluid is increased, the heat collection temperature of the collector 1 is lowered, the heat collection efficiency is improved, and the heat exchanger The flow rate of the working fluid 12 in the pump 3 is increased, and the heat exchange capacity is improved.

Next, another embodiment of the present invention will be described with reference to FIGS. 2 and 3. The difference in FIGS. 2 and 3 from the previous embodiment is that the diffusion portion 15 is not concave but convex and jagged, and this structure also has the same effect as the previous embodiment.

Effects of the Invention In the heat transfer device of the present invention, the pipe end opening of the return pipe connecting the liquid storage tank and the heat exchanger is located upward near the upper wall surface of the liquid storage tank, and the pipe end opening of the return pipe connects the liquid storage tank and the heat exchanger. Since a diffusion section for dispersing the working fluid is provided on the upper wall surface of the liquid storage tank nearby, the working fluid discharged into the liquid storage tank from the pipe end opening of the return pipe flows into the diffusion section on the upper wall surface of the liquid storage tank. The circulating flow rate of the working fluid is increased by stirring, cooling and condensing the vapor of the working fluid that has been diffused by heating, reducing the pressure inside the fluid reservoir tank and increasing the pressure difference between the generator and the fluid reservoir tank. It is possible to improve the heat exchange capacity of the generator and the heat exchanger, and improve the heat transfer performance from the generator to the heat exchanger.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a heat transfer device showing one embodiment of the present invention, FIGS. 2 and 3 are partial block diagrams of a heat transfer device showing other embodiments of the present invention, and FIG. 4 is a conventional heat transfer device. FIG. 2 is a configuration diagram of a heat transfer device. 1... Generator, 3... Heat exchanger, 4b... Check valve, 5... Outgoing pipe, 6... Liquid level detection sensor, 7...
...Liquid storage tank, 8...Return pipe, 9...Return pipe, 10
... Valve mechanism, 11 ... Communication pipe, 14 ... Pipe end opening, 15 ... Diffusion section, 16 ... Steam tank.

Claims (1)

[Claims] 1. A generator in which a working fluid is sealed and generates steam, a heat exchanger installed in a heat exchange tank located below the generator, and a liquid level detection sensor located above the generator. a vapor tank located above the liquid storage tank; a valve mechanism connecting the upper part of the liquid storage tank and the lower part of the steam tank and whose opening and closing are controlled by the liquid level detection sensor; A communication pipe that connects the upper part of the generator and the steam tank, a return pipe that connects the generator and the lower part of the liquid storage tank and is provided with a check valve in the middle, and connects the generator and the heat exchanger. an outgoing pipe, a return pipe that connects the liquid storage tank and the heat exchanger and has a pipe end opening facing upward near the upper wall surface of the liquid storage tank; A heat transfer device consisting of a diffusion section that diffuses the working fluid provided on the upper wall of the storage tank.