JPS61153490A - Heat transfer device - Google Patents

Abstract

PURPOSE:To smoothen the retrieval of operating liquid from a liquid reserving tank to a generator by a method wherein second nonreturn valve is provided on a return tube between a liquid absorbing tank and the liquid reserving tank. CONSTITUTION:When the operating liquid 12 is retrieved from the liquid reserving tank 7 to a collector 1 through an opening and closing valve 10 being opened, the operating liquid 12 is retrieved once into the liquid absorbing tank 14 and is retrieved from the liquid absorbing tank 14 into the collector 1 even under the closed condition of the opening and closing valve 10 whereby a time for retrieving the operating liquid is shortened and the average flow amount of the operating liquid 12 is increased. On the other hand, the operating liquid 12 flows from the liquid absorbing tank 14 into the collector 1 to supplement the same liquid 12, which flows out of the collector 1 through a sending pipe 5 under the closed condition of the opening and closing valve 10, therefore, dry-out of the heat collecting pipe of the collector 1 may be prevented and the performances of heat transfer and heat collection may be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat transfer device that is used in solar heat collectors, waste heat recovery devices, air conditioning and hot water supply equipment, etc., and uses a latent heat medium as a working fluid.

2. Description of the Related Art A conventional heat transfer device of this type was constructed as shown in FIG. A heat exchange tank 2 storing hot water is placed below a collector 1 (generator) consisting of a plurality of heat collecting pipes, and the heat exchanger 3 and collector 1 housed in the tank 2 are
They are connected by an outgoing pipe 5 which is provided with a first check valve 4& in the middle. The liquid storage tank 7, which houses a liquid level detection sensor 6 (liquid level detection means) inside, is arranged above the collector 1, and is connected to the collector 1 by a return pipe 8 with a second check valve 4b provided in the middle. It is connected to the heat exchanger 3 by a return pipe 9, and the upper part of the liquid reservoir tank 7 and the upper part of the collector 1 are connected by a communication pipe 11 with an on-off valve 10 (valve mechanism) provided in the middle. - 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 as a latent heat medium detected by the liquid level detection sensor 6 becomes larger than a set value H. has been done.

Problems to be Solved by the Invention However, in the above configuration, when the working liquid 12 in the liquid reservoir tank 7 is recovered to the collector 1, the resistance of the working liquid 12 passing through the heat collecting pipe of the collector 1 is large.
This poses a problem in that it hinders the recovery of the working fluid 12 and reduces heat transfer performance and heat collection efficiency.

The present invention solves such conventional problems and aims to facilitate the recovery of working fluid from the fluid reservoir tank to the generator.

Means for Solving the Problems In order to solve the above problems, the heat transfer device of the present invention provides a liquid absorption tank on the return pipe above the generator, the upper part of which communicates with the upper part of the generator; A second check valve is provided on the return pipe between the liquid absorption tank and the liquid storage tank.

Operation of the present invention is as described above.
Once guided, the working fluid in the fluid reservoir tank passes through the return pipe and is collected into the fluid absorption tank and is also collected into the generator to facilitate the collection of the working fluid. Next, when the level of the hydraulic fluid in the liquid storage tank decreases and the valve mechanism closes, the collection of hydraulic fluid from the liquid storage tank stops, but the hydraulic fluid in the liquid absorption tank is collected into the generator and stored inside the generator. EXAMPLES An example of the present invention will be described below with reference to FIG. 1. 6 The same members as in FIG. 2 are given the same numbers and their explanations will be omitted. A steam introduction part 13ff is provided at the upper part of the liquid storage tank 7, and an on-off valve 1 that goes up to the float 6 (liquid level detection means) and is controlled to open and close.
0 (valve mechanism) to connect the liquid reservoir tank 7 and the steam introduction section 13.
is connected.

The upper part of the liquid absorption tank 14 provided on the return pipe 8 above the collector 1 communicates with the upper part of the collector 1, and the second check valve 4b is provided on the return pipe 8 above the liquid absorption tank 14. When the collector 1 is heated by sunlight and the temperature becomes higher than the heat exchanger P3, the working fluid 12 flows from the collector 1 through the outgoing pipe 5 to the heat exchanger 3, and then flows into the liquid storage tank 7 through the returning pipe 9, and then flows into the collector 1. The heat is transferred from the heat exchanger 3 to the heat exchanger 3 to raise the temperature of the hot water in the heat exchange tank 2. When the liquid level of the working liquid 12 in the liquid storage tank 7 rises and the buoyancy of the float 6 increases, pushing up the on-off valve 10 and opening it, the steam of the working liquid 12 in the collector 1 flows from the communication pipe 11 to the steam introduction part 13.
The liquid is introduced into the liquid storage tank 7 through the return pipe 8 and collected into the liquid absorption tank 14 as well as into the collector 1. As the liquid level of the hydraulic fluid 12 decreases, the float 6 also descends and the on-off valve 10 closes, the recovery of the hydraulic fluid 12 from the fluid reservoir tank 7 is stopped and the fluid passes from the collector 1 through the heat exchanger 3 again to the fluid reservoir tank. Although the hydraulic fluid 12 flows into 7,
Since the working fluid 12 in the fluid absorption tank 14 is located above the collector 1, it is collected into the collector 1 and transferred to the collector 1.
Prevents heat collection pipes from drying out.

In the above embodiment, when the hydraulic fluid 12 is recovered from the liquid reservoir tank 7 to the collector 1 with the on-off valve 10 in the open state, the hydraulic fluid 12 is first recovered into the liquid absorption tank 14 and the on-off valve 10 is in the closed state. By recovering the hydraulic fluid from the liquid absorption tank 14 to the collector 1 even when
When the on-off valve 1o is in the closed state, the hydraulic fluid 12 flows from the liquid absorption tank 14 into the collector 1 to supplement the hydraulic fluid 12 flowing out from the collector 1 through the outgoing pipe 6. This improves heat transfer performance and heat collection performance.

Effects of the Invention As described above, according to the heat transfer device of the present invention, the upper part of the liquid absorption tank provided on the return pipe above the generator is communicated with the upper part of the generator, and the second check valve is connected to the upper part of the liquid absorption tank. Since it is installed on the return pipe, the following effects can be obtained.

(1) By temporarily collecting the working fluid into the liquid absorption tank, the time required to recover the working fluid from the liquid storage tank to the generator can be shortened, and the average flow rate of the working fluid can be increased in total, improving heat transfer performance. .

(Success: Since the working fluid flows from the liquid absorption tank to supplement the working fluid that has flowed out from the generator to the liquid storage tank, dryout of the generator can be prevented and heat transfer performance can be improved.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an example of a heat transfer device of the present invention;
FIG. 2 is a configuration diagram of a conventional heat transfer device. 1. River...generator, 3... heat exchanger, 4 &... river... first check valve, 4b... second check valve, 5...
...Outgoing pipe, 6...Liquid level detection means, 7...
...Liquid storage tank, 8.River...Return pipe, 9...
Return pipe, 10...Valve mechanism, 11. River...Communication pipe,
14...Liquid absorption tank. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 7...Liquid tank I...Hiroki

Claims (1)

[Claims] A generator that contains a working liquid of a latent heat medium and generates steam; a heat exchanger that is installed in a heat exchange tank located below the generator; A liquid reservoir tank in which a detection means is housed, a communication pipe connecting the upper part of the generator and the upper part of the liquid reservoir tank and having a valve mechanism in the middle thereof which is controlled to open and close by the liquid level detection means, and the generator. an outgoing pipe that connects the heat exchanger; a return pipe that connects the heat exchanger and the liquid storage tank; a first check valve provided on either the outgoing pipe or the return pipe; a return pipe connecting the lower part of the generator and the lower part of the liquid storage tank; a liquid absorption tank provided on the return pipe above the generator and whose upper part communicates with the upper part of the generator; and the liquid storage tank and the liquid absorption tank. a second check valve provided on the return pipe between the tanks.