JPS616543A - Heat transmission device - Google Patents

Abstract

PURPOSE:To enable to let a valve stably block a connecting port even when a float vibrates severely due to the shaking of the level of working liquid in a liquid receiver tank and consequently to transmit heat stably by a structure wherein a float and the shaft of a valve are separated from each other. CONSTITUTION:A valve 14 does not fixed to a float 12 or a shaft and the float are in a state separated from each other. Consequently, even when working liquid 1 flows in a liquid storage tank 6 at large flow rate and consequently the float 12 vibrates severely due to the shaking of the level of the working liquid 1, the valve 14 keeps a connecting port 11 in a closed-up state until the shaft 13 comes into contact with the float 12 after the liquid level exceeds the predetermined height. Accordingly, the stable flow of the working liquid can be obtained, resulting in enabling to perform the heat transmission also under the stable state.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a non-powered heat transfer device applied to solar heat collection systems, waste heat recovery systems, and the like.

Structure of the conventional example and its problems As shown in FIG. 1, in the conventional heat transfer device of this type, a heat exchanger 3 for heat dissipation is provided below a generator 2 in which a working fluid 1 as a latent heat medium is sealed, and a heat exchanger 3 for heat radiation is provided above. A liquid storage tank 6 consisting of an upper chamber 4 and a lower chamber 5 is provided, and the generator 1 and the heat exchanger 3 are connected by an outgoing pipe 7, and the heat exchanger 3 and the lower chamber 5 are connected by a return pipe 8. However, the lower chamber 5 and the generator 2 were connected by a return pipe 9, and the upper chamber 4 and the generator 2 were further connected by a communication pipe 10. Connection port 1 connecting upper chamber 4 and lower chamber 5 of liquid storage tank 6
1 was provided with a valve 14 fixed to a shaft 13 of a float 12 which was housed in the lower chamber 5.

Further, the return pipe 9 was provided with a first check valve 15a, and the return pipe 8 was provided with a second check valve 15b. To explain the state of heat transfer in the above configuration, when the working fluid 1 in the generator 2 is heated, it evaporates and the internal pressure increases, so the high temperature working fluid 1 flows into the heat exchanger 3 through the outgoing pipe 7. and releases heat.

At this time, the working fluid 1 cooled by the heat exchanger 3 flows into the lower chamber 5 of the liquid storage tank 6 through the return pipe 8 and pushes up the float 12 . When the liquid level of the working liquid 1 in the liquid storage tank 6 rises and the float 12 rises, the valve 14 is pushed up and the connection port 11 is opened, so that the vapor of the working liquid 1 in the generator 2 passes through the communication pipe and flows to the upper part. The liquid is introduced into the chamber 4 and is introduced into the lower chamber 5 through the connection port 11.

Therefore, since the pressures in the generator 2 and the lower chamber S are approximately the same, the working fluid 1 in the lower chamber 5 passes through the return pipe 9 to the generator 2.
will be returned to by gravity.

Further, when the liquid level of the working fluid 1 in the lower chamber 5 decreases and the float 12 is pushed down and the valve 14 closes the connection port 11, the working fluid 1 is again pressure-fed from the generator 2 to the heat exchanger 3 and heat transfer is performed. It will be done. Thereafter, by repeating the same operation, the heat obtained by the generator 2 is transferred to the heat exchanger 3.

However, in this configuration, the float 12 and the valve 14 are
3, so if the hydraulic fluid 1 enters the reservoir tank 6 at a large flow rate, the fluid level will vibrate, and the valve 14 will vibrate during the vertical movement of the float 12, resulting in an incomplete seal. The problem was that the operation became unstable.

Purpose of invention The present invention solves these conventional problems.

The purpose is to securely seal a valve and perform stable heat transfer even when a large flow of working fluid flows into a liquid storage tank.

Structure of the Invention In order to achieve this object, the present invention provides a heat exchanger below a generator in which a working fluid of a latent heat medium is sealed, and a liquid storage tank having two spaces, an upper chamber and a lower chamber, above. At the same time, the generator and the heat exchanger are connected by an outgoing pipe, the heat exchanger and the lower chamber are connected by a return pipe, the lower chamber and the generator are connected by a return pipe, and the generator and the upper chamber are connected by a communicating pipe, A first check valve is provided in the return pipe, a second check valve is provided in the return pipe, and a freely movable float is provided in the lower chamber of the liquid storage tank, and the upper chamber and The connection port in the lower chamber is equipped with a valve that opens when pushed up by the float. This configuration increases the flow rate of the working fluid entering and exiting the liquid storage tank, causing the liquid level to vibrate greatly, causing the float to shake. Also, the vibration of the float is not transmitted to the valve until a certain level of liquid is reached, and the valve stably closes the connection port.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. Second
In the figure, 1 is a working liquid of a latent heat medium, 2 is a generator, 3 is a heat exchanger, 4 is an upper chamber, 5 is a lower chamber, 6 is a liquid storage tank,
7 is an outgoing pipe, 8 is a return pipe, 9 is a return pipe, 10 is a communicating pipe, 11 is a connection port, 12 is a float, 13 is a shaft, 14 is a valve, 15a
15b is a first check valve, and 15b is a second check valve. In addition, the first
Components that are the same as those in the figures are given the same numbers.

In the above configuration, the float 12 and the valve 14 are not fixed and the shaft 13 and the float 12 are disconnected, so even when the hydraulic fluid 1 flows into the liquid storage tank 6 at a large flow rate, the float 12 and the valve 14 are not fixed. Even if the float 12 vibrates greatly due to fluctuations in the liquid level of the hydraulic fluid 1, the valve 14 closes the connection port 11 until the liquid level reaches a predetermined height or higher and the float 12 comes into contact with the shaft 13. Therefore, a stable flow of the working fluid 1 can be obtained, and heat transfer can also be carried out in a stable state.

Effects of the Invention As described above, the heat transfer device of the present invention provides the following effects.

(1) The float and shaft are separated, so even if the float vibrates significantly due to fluctuations in the hydraulic fluid level in the liquid storage tank, the vibrations of the float will not be transmitted to the valve below the specified liquid level. Therefore, the valve can stably close the connection port. Therefore, stable heat transfer can be achieved.

(2) Since the float and shaft are separated, the valve can be opened and closed even if the tank is installed slightly tilted, allowing stable heat transfer.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional heat transfer device, and FIG. 2 is a block diagram showing an embodiment of the heat transfer device of the present invention. 1... Working fluid, 2... Generator, 3 Heat exchanger, 4- Upper chamber, 5... Lower chamber, 6... Liquid storage tank, 7... Outgoing pipe, 8... Returning pipe, 9...Return pipe, 10...Communication pipe, 11
・・Connection port, 12・Float, 14・Valve, 15a・
-First check valve, 15b...Second check valve. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (1)

[Claims] A generator sealed with a working fluid as a latent heat medium, a heat exchanger provided below the generator, and a liquid storage tank provided above the generator and having two spaces, an upper chamber and a lower chamber. , an outgoing pipe that connects the generator and the heat exchanger; a return pipe that connects the heat exchanger and a lower chamber of the liquid storage tank; and a return pipe that connects the lower chamber of the liquid storage tank and the generator. a communication pipe connecting the generator and the upper chamber of the liquid storage tank; a first check valve provided on the return pipe; and a first check valve provided on the outgoing pipe or the return pipe. 2. A check valve, a float movably provided in the lower chamber of the liquid storage tank, and a connection port connecting the upper and lower chambers of the liquid storage tank and opened and closed by the float. A heat transfer device consisting of a valve.