JPH0228792B2 - NETSUHANSOSOCHI - 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.

Structure of Conventional Example and Its Problems A conventional heat transfer device of this type was constructed 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 means 6 is housed is arranged above the collector 1, connected to the heat exchanger 3 through a return pipe 8, and connected to the collector 1 with a check valve 4b in the middle. It is connected by a return pipe 9, and is also connected to a liquid storage tank 7.
There is an on-off valve 10 between the upper part of the collector 1 and the upper part of the collector 1.
(valve mechanism) are connected through a communication pipe 11 provided with a valve mechanism. Hydraulic fluid 1 detected by liquid level detection means 6
The liquid level of the hydraulic fluid 12 is controlled by a controller 13 which opens the on-off valve 10 when the liquid level of the hydraulic fluid 12 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. Hydraulic fluid 12 detected by liquid level detection means 6
When the liquid level becomes larger than the set value H, the on-off valve 10 is opened by the controller 13, and 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 pressure inside the collector 1 is reduced. Liquid reservoir tank 7
The working fluid 12 in the fluid reservoir tank 7 is collected into the collector 1 through the return pipe 9. Hydraulic fluid 1
When the liquid 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 recovery of the hydraulic fluid 12 to the collector 1 is completed.

In this configuration, when the on-off valve 10 is open, the hydraulic fluid 12 in the fluid reservoir tank 7 flows into the collector 1 due to its own weight, but the flow of the hydraulic fluid 12 through the heat exchanger 3 is stopped and heat is generated. There was a problem that it could not be replaced. On the other hand, even when the on-off valve 10 is closed, the flow rate of the working fluid 12 in the heat exchanger 3 is reduced due to the inertia of the working fluid 12 stopped in the outgoing pipe 5, heat exchanger 3, and returning pipe 8. There was also the problem that the heat exchange performance did not increase quickly and a predetermined heat exchange performance could not be obtained.

Purpose of the invention The present invention solves the above-mentioned conventional problems.
The purpose is to improve the heat exchange performance of the heat exchanger by making the flow of the working fluid continuous and increasing the circulation flow rate, reducing the temperature difference between the generator and the heat exchanger, and improving heat transfer performance. shall be.

Structure of the Invention In order to achieve the above-mentioned object, the present invention alternately opens a steam introduction part and a liquid introduction part provided at the upper part of a main tank located above a generator and having a liquid level detection means, by the liquid level detection means.・The first blockage controlled
A liquid reservoir tank is provided which is connected to the main tank through a valve mechanism and a second valve mechanism.

With this configuration, when the first valve mechanism is in the open state and steam is introduced from the steam introduction part to the main tank and the working fluid in the main tank is flowing into the generator, the second valve mechanism is in the closed state. The working fluid in the generator exchanges heat with the heat exchanger and is cooled down, flows into the fluid introduction section, and accumulates. Further, when the first valve mechanism is in a closed state, the second valve mechanism is in an open state,
The working fluid accumulated in the liquid introduction part flows into the main tank, and the working fluid in the generator is cooled by heat exchange in the heat exchanger and flows into the main tank through the liquid introduction part. The flow of working fluid through the heat exchanger is thus continuous.

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 and their explanations are omitted. A sub-tank 14 provided above the collector 1 (generator) is connected by piping to the upper part of the collector 1, and is connected to the heat exchanger 3 by an outgoing pipe 5. The liquid reservoir tank 7 is provided above the collector 1 and consists of a main tank 15, a steam introduction part 16, and a liquid introduction part 17. 17, and the main tank 15 and the steam introduction section 1 are controlled by a first valve mechanism 18 and a second valve mechanism 19 which are alternately controlled to open and close by the liquid level detection means 6.
6. The liquid introduction parts 17 are connected to each other. Return 8
The heat exchanger 3 and the liquid introduction part 17 are connected to each other, the lower part of the main tank 15 and the collector 1 are connected to each other by the return pipe 9 having a check valve 4b in the middle, and the steam introduction part 16 and the sub tank 14 are connected to each other by the communication pipe 11. The top is connected.

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 heat exchanger 3 through the outgoing pipe 5, and the cooled working fluid 12 exchanges heat with the hot water in the heat exchange tank 2 and passes through the returning pipe 8 to the liquid introduction part 17.
sent to. At this time, the first valve mechanism 18 is in a closed state and the second valve mechanism 19 is in an open state, and the liquid introduction part 1
The hydraulic fluid 12 that has flowed into the main tank 15 passes through the second valve mechanism 19 without accumulating in the fluid introducing portion 17 . The liquid level of the hydraulic fluid 12 in the main tank 15 rises and when it reaches a predetermined height H, the first valve mechanism 18 is pushed up by the liquid level detection means 6 to open the second valve mechanism 19.
is pushed up and becomes blocked. The collector 1 and the main tank 15 communicate with each other through a steam introduction part 16, and the working fluid accumulated in the main tank 15 through the introduction of steam is returned to the collector 1 through the return pipe 9, and is heated by the heat exchanger 3. Replaced and cooled hydraulic fluid 1
2 flows into the liquid introduction section 17. main tank 15
When the liquid level of the hydraulic fluid 12 in the hydraulic fluid 12 decreases to below a predetermined height H, the first valve mechanism 18 becomes closed and the second valve mechanism 19 becomes open, causing fluid to accumulate in the fluid introduction section 17. The working fluid 12 flows into the main tank 15 and is further cooled by heat exchange in the heat exchanger 3. The working fluid 12 flows into the fluid introduction part 17 through the return pipe 8 and passes through the second valve mechanism 19 without accumulation. and flows into the main tank 15. Therefore, no matter where the level of the hydraulic fluid 12 in the main tank 15 is, the flow of the hydraulic fluid 12 in the heat exchanger 3 is continuous, and since there is no resistance due to inertia, the flow rate of the hydraulic fluid 12 is low. This increases the heat exchange capacity and improves the heat transfer performance.

Effects of the Invention According to the heat transfer device of the present invention, the steam introduction part and the liquid introduction part provided in the upper part of the main tank located above the generator and having the liquid level detection means are alternately connected by the liquid level detection means. Since a liquid storage tank is provided which is connected to the main tank through a first valve mechanism and a second valve mechanism that are controlled to open and close, the generator and the main tank are communicated with each other to generate hydraulic fluid. Even when the working fluid is being refluxed to the vessel, it is possible to improve the heat exchange performance and the heat transfer performance by making the flow of the working fluid in the heat exchanger continuous by flowing into the fluid introduction section.

[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. DESCRIPTION OF SYMBOLS 1... Generator, 3... Heat exchanger, 5... Outgoing pipe, 6... Liquid level detection means, 7... Liquid reservoir tank, 8... Return pipe, 9...
Return pipe, 11... Communication pipe, 12... Working fluid, 15... Main tank, 16... Steam introduction part, 17... Liquid introduction part,
18...first valve mechanism, 19...second valve mechanism.

Claims (1)

[Claims] 1. A generator that is sealed with a working fluid and generates its steam, a heat exchanger provided in a heat exchange tank located below the generator, and a liquid level detection means located above the generator. A main tank, a first valve mechanism and a second valve mechanism that are alternately controlled to open and close by the liquid level detection means, a steam introduction part and a liquid introduction part provided above the main tank, and the main tank. a liquid reservoir tank configured by connecting the steam introduction part and the liquid introduction part by the first valve mechanism and the second valve mechanism, respectively; an outgoing pipe connecting the generator and the heat exchanger; A heat transfer device comprising a return pipe that connects the heat exchanger and the liquid introduction section, a return pipe that connects the generator and the lower part of the main tank, and a communication pipe that connects the generator and the steam introduction section. .