JPH0423181B2 - - 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.

Conventional Structure and Problems Conventionally, this type of heat transfer device has been structured 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, connected to the heat exchanger 3 through an outgoing pipe 8, and connected to the collector 1 with a check valve 4b on the way. The upper part of the liquid reservoir tank 7 and the upper part of the collector 1 are connected by a return pipe 9, and an on-off valve 1 is provided in the middle.
0 (valve mechanism) is connected through a communication pipe 11 provided with a valve mechanism. 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 opens and closes the on-off valve 10, and the collection of the hydraulic fluid 12 to the collector 1 is completed.

In this configuration, when the on-off valve 10 is in an open state and the hydraulic fluid is being collected from the fluid reservoir tank 7 to the collector 1, the vapor of the high temperature hydraulic fluid 12 flows from the collector 1 to the fluid reservoir tank 7 through the communication pipe 11. However, when the on-off valve 10 is closed, the low-temperature working fluid 12 flowing from the outgoing pipe 8 cools and condenses, but at the same time, the temperature of the working fluid 12 rises corresponding to the amount of heat of condensation, and the high-temperature working fluid flows into the collector 1. 12 will be collected,
The heat collection temperature of the collector 1 became high, reducing the heat collection efficiency.

Purpose of the invention The present invention solves the above-mentioned conventional problems.
The purpose is to improve heat transfer performance.

Structure of the Invention In order to achieve the above object, the present invention provides a second heat exchanger in a second heat exchange tank located below the liquid reservoir tank, and provides a second heat exchanger between the lower part of the liquid reservoir tank and the second heat exchanger.
The heat exchanger is connected to a return pipe, and the generator and the second heat exchanger are connected to each other by a return pipe, and a second check valve is provided in the return pipe or the return pipe.

With this configuration, when recovering the working fluid, the working fluid in the fluid storage tank exchanges heat with the hot water in the second heat exchange tank in the second heat exchanger, becomes low temperature, and is collected in the generator. .

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The same members as in FIG. 1 are given the same numbers. A sub-tank 14 provided above the collector 1 (generator) consisting of a plurality of heat collection pipes is connected to the upper part of the collector 1 by piping, and is placed below the collector 1 in a first heat exchange tank 2 that stores hot water. The first heat exchanger 3 and the lower part of the sub-tank 14 are connected by an outgoing pipe 5 having a first check valve 4a in the middle. A liquid reservoir tank 7 in which a liquid level detection sensor 6 is housed is arranged above the collector 1, and is connected to the first heat exchanger 3 through a return pipe 8, and is connected to the sub tank 1.
It is connected to the upper part of 4 by a communication pipe 11 in which an on-off valve 10 (valve mechanism) is provided. A second heat exchanger 16 is provided in a second heat exchange tank 15 which is disposed below the liquid reservoir tank 7 and stores hot water.
The lower part is a return pipe 17 with a second check valve 4b in the middle.
connected with. A controller 1 that opens an on-off valve 10 when the liquid level of a hydraulic fluid 12 detected by a liquid level detection sensor 6 becomes larger than a set value H.
3 controls the level of the hydraulic fluid 12.

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 is sent to the sub-tank 14 in two phases of gas and liquid, where the gas and liquid are separated. The working fluid 12 is forced into the first heat exchanger 3 through the outgoing pipe 5, and the working fluid 12, which has been cooled by exchanging heat with hot water in the first heat exchange tank 2, passes through the returning pipe 8 and becomes liquid. The liquid is sent to the reservoir tank 7, and the level of the working fluid 12 in the reservoir tank 7 gradually rises. At this time, in order to condense the vapor of the working fluid 12 in the liquid storage tank, the temperature of the working fluid 12 flowing into the tank increases. 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 on-off valve 10 is opened by the controller 13, and the upper part of the sub-tank 14 and the upper part of the liquid reservoir tank 7 are connected to the communicating pipe 11. The vapor of the working fluid 12 above the sub-tank 14 is sent to the liquid reservoir tank 7, the pressure inside the sub-tank 14 is guided to the liquid reservoir tank 7, and the liquid reservoir tank 7
The working fluid 12 inside passes through the return pipe 9 to the second heat exchanger 16
to exchange heat with hot water in the second heat exchange tank 15,
It is sent to the lower part of the collector 1 through the cooled return pipe 17 and collected by the collector 1. When the liquid level of the hydraulic fluid 12 in the liquid storage tank 7 decreases and becomes smaller than the set value H, the on-off valve 10 is closed by the controller 13, and the collection of the hydraulic fluid 12 to the collector 1 is completed.

In this manner, in the above embodiment, when the working fluid 12 is recovered from the liquid reservoir tank 7 to the collector 1, the working fluid 12 is passed from the return pipe 9 to the second heat exchanger 16 and
Heat exchange is performed with the hot water in the heat exchange tank 15, and the cooled working fluid 12 is collected into the collector 1 to lower the heat collection temperature, thereby improving the heat collection efficiency. Furthermore, if Freon, etc., whose specific weight increases as the temperature decreases, is used as the working fluid 12, the return pipe 17
The specific weight of the hydraulic fluid 12 in the collector 1 increases, and the specific weight of the hydraulic fluid 12 in the collector 1 increases.
Since the recovery power of the working fluid 12 is increased, the time required to recover the working fluid 12 can be shortened and the heat transfer performance can be improved.

Effects of the Invention The heat transfer device of the present invention includes a second heat exchanger provided in a second heat exchange tank located below a liquid reservoir tank, and a return pipe connects the lower part of the liquid reservoir tank and the second heat exchanger. , the generator and the second heat exchanger are each connected by a return pipe, and the second heat exchanger is connected to the return pipe or the return pipe.
Since a check valve is provided, the working fluid in the liquid storage tank is cooled by the hot water in the second heat exchanger tank in the second heat exchanger, becomes low temperature, and is collected in the generator, which controls the operation inside the generator. Since the liquid temperature decreases, the temperature difference between the liquid and the hot water in the first heat exchange tank becomes smaller, making it possible to transfer heat with a low temperature difference.

In addition, even if the distance between the generator and the first heat exchange tank is increased, the return pipe and the return pipe will not be long, which will hinder the recovery of the working fluid from the reservoir tank to the generator. There is no decrease in heat transfer performance.

[Brief explanation of drawings]

Figure 1 is a system diagram of a conventional heat transfer device, Figure 2 is a system diagram of a conventional heat transfer device.
The figure is a system diagram of a heat transfer device according to an embodiment of the present invention. 1... Generator, 2... First heat exchange tank, 3...
...First heat exchanger, 4a...First check valve, 4b...
2nd check valve, 5... Outgoing pipe, 6... Liquid level detection sensor, 7... Liquid reservoir tank, 8... Return pipe, 9... Return pipe, 10... Valve mechanism, 11... Communication pipe , 12...
Working fluid, 15...second heat exchange tank, 16...second heat exchanger, 17...return pipe.

Claims (1)

[Claims] 1. A generator in which a working fluid is sealed and generates its steam; a first heat exchanger provided in a first heat exchange tank located below the generator; and a first heat exchanger provided in a first heat exchange tank located above the generator; a liquid reservoir tank in which a liquid level detection sensor is housed; an outgoing pipe connecting the generator and the first heat exchanger; a return pipe connecting the first heat exchanger and the liquid collecting tank; a first check valve provided in the pipe or the return pipe; a communication pipe connecting the upper part of the generator and the upper part of the liquid storage tank and having a valve mechanism provided in the middle thereof controlled by the liquid level detection sensor; a second heat exchanger provided in a second heat exchange tank located between the liquid reservoir tank and the lower part of the generator; a return pipe connecting the lower part of the liquid reservoir tank and the second heat exchanger; A heat transfer device comprising a return pipe connecting the second heat exchanger and the lower part of the generator, and a second check valve provided on the return pipe or the return pipe.