JPH03260593A - Heat feed apparatus - Google Patents

Abstract

PURPOSE:To enhance the capacity of a gas-liquid separator and to prevent the abnormal heating of a heater or the pressure rise in the system by uniformly distributing a cooling medium to a radiator by providing an evaporation accelerating device to the gas-liquid separator. CONSTITUTION:A part of the exhaust pipe 14 for the exhaust of a heater 4 is guided into the gas-liquid separator 13 which is connected to the gas pipe 5 connected to an upper header 1 and the liquid return pipe connected to a lower header 2 to constitute an evaporation accelerating device 15 heating a heating medium. The heating medium is heated by the heater 4 to be brought to an evaporative state and introduced into the gas-liquid separator 13 from the upper header 1 through the gas pipe 5 and the liquid component is returned to the lower header 2 through the liquid return pipe 6 while the heating medium heated by the evaporation accelerating device 15 to be perfectly gasified is guided to a radiator 8 through a forward pipe 9 and condensed to be returned to the lower header 4 under gravity through a return pipe 10.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat transfer device used in a heating/cooling air conditioner and an exhaust heat recovery device.

BACKGROUND OF THE INVENTION Conventionally, this type of heat transfer device has had a structure as shown in FIG. That is, the upper header 1 and the lower header 2 are connected by a heater 4 having a heat exchanger 3, a gas pipe 5 connected to the upper header 1, and a liquid return pipe 6 connected to the lower header 2. a gas-liquid separator 7, a radiator 8 provided above the heater 4, an outgoing pipe 9 connecting the gas-liquid separator 7 and the radiator 8, and a return pipe connecting the radiator 8 and the lower header 2. Water or an evaporative latent heat medium 11 such as fluorocarbon is sealed in a closed circuit constituted by a tube 10,
The heater 4 was heated by the heat source 12 and the waste heat was directly released to the outside.

Therefore, when the heater 4 is heated, the internal evaporative latent heat medium 11 evaporates, becomes a gas-liquid two-phase state, passes through the gas pipe 5, and is almost separated into gas and liquid by the gas-liquid separator 7. The outgoing pipe 9 is taken in a slightly moist gas-liquid two-phase state and guided to the radiator 8. On the other hand, the liquid in the gas-liquid separator 7 passes through the liquid return pipe 6 and is dropped into the lower header 2 of the heater 4. At this time,
The gas-liquid two-phase flow within the heat radiator 8 radiates heat by condensing the gas and releasing sensible heat from the liquid. The liquid in the radiator 8 passes through the return pipe 10 under the action of gravity, returns to the lower header 2 of the heater 4, is heated again by the heat source 12, and is circulated in the closed circuit by repeating evaporation and condensation.

Problems to be Solved by the Invention In such a conventional heat transfer device, complete separation of gas and liquid is impossible in the gas-liquid separator 7.
There was a tendency for the heating medium to circulate in the outgoing pipe in a gas-liquid two-phase state, and the heat medium to be unevenly distributed in the radiator 8 in a liquid state. As a result, the heat medium in the heater 4 becomes insufficient, causing the heater 4 to overheat abnormally, and furthermore, in the heat exchanger of the radiator 8, the heat exchanger area in the latent heat region decreases, causing the heat exchanger 3 to become overheated. The area of the heat exchanger had to be increased because the efficiency decreased and the pressure in the heat transfer system increased.

The present invention solves the above problems, and by improving the performance of the gas-liquid separator, it prevents the pressure increase in the heat medium conveyance system, enables operation with a small radiator, and effectively dissipates heat. It is an object of the present invention to provide a heat transfer device that can improve system efficiency when utilized.

Means for Solving the Problems In order to achieve the above object, the present invention provides a heater constituted by a heat exchanger connecting an upper header and a lower header, and a heater connected to an upper header by a gas pipe. , connected to the lower header by a liquid return pipe from the bottom, which accelerates the vaporization of the heating medium by heating the refrigerant.

A sealed system consisting of a gas-liquid separator with a vaporization accelerator, a radiator installed above the heater, an outgoing pipe that connects the gas-liquid separator and the radiator, and a return pipe that connects the lower header and the radiator. It has a configuration in which an evaporative heating medium is enclosed in the circuit.

Operation The present invention has the above-described configuration, so that the state of the heating medium flowing in the outgoing pipe is completely gaseous. This prevents uneven distribution of the heat medium in the radiator, prevents abnormal overheating due to liquid shortage in the heater, and further increases the heat exchange area in the latent heat area of the radiator heat exchanger to improve heat exchange efficiency. It is something that can be done.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG. It should be noted that the same parts as in the prior art are given the same reference numerals and detailed explanations will be omitted.

Gas pipe 5 connected to the upper header 1 as shown in the figure
and a vaporization promoter that heats the heat medium by introducing a part of the exhaust pipe 14 that exhausts the heater 4 into the gas-liquid separator 13 that is connected to the liquid return pipe 6 that is connected to the lower header 2. 15
It is composed of

In the above configuration, the evaporative latent heat medium 11 heated in the heater 4 evaporates in the heat exchanger 3, becomes a gas-liquid two-phase state, passes through the upper header pipe 1 and the gas pipe 5, and is separated into gas and liquid. The liquid is introduced into the vessel 13 and returned to the lower header 2 through the liquid return pipe 6, and the heat medium that has been completely gasified by being heated by the vaporization accelerator 15 passes through the outgoing pipe 9 to the radiator 8. It is guided, condensed and returned by gravity to the lower header 4 through the return pipe IO.

Therefore, the heat medium flowing from the gas-liquid separator 13 to the radiator 8 is in a gas state, and excess heat medium in a liquid state is sent to the radiator 8, thereby preventing uneven distribution of the heat medium in the radiator 8. As a result, overheating due to liquid shortage in the heater 4 is less likely to occur, and the heat exchange efficiency of the radiator 8 is also improved. Furthermore, by recovering exhaust heat using the vaporization accelerator 15, system efficiency is also improved.

In addition, as another embodiment, a configuration in which an electric heater or the like is used as the heat source of the vaporization accelerator can also be considered.

Effects of the Invention As is clear from the above embodiments, according to the heat transfer device of the present invention, the gas-liquid separator is provided with a vaporization accelerator, so the performance of the gas-liquid separator is improved and the refrigerant distribution is improved. It is possible to provide a heat transfer device that can prevent abnormal overheating of the heater and pressure increase in the system without relying on the radiator.

Further, in a configuration in which exhaust heat from exhaust gas is used as a heat source for a vaporization accelerator of a gas-liquid separator, system efficiency is improved.

[Brief explanation of drawings]

FIG. 1 shows the constituent countries of a heat transfer device according to an embodiment of the present invention, and FIG. 2 shows the constituent countries of a conventional heat transfer device. 1... Upper header, 2... Lower header, 3... Heat exchanger, 4... Heater, 5... Gas pipe , 6...Liquid return pipe, 1
1... Heat medium, 13... Gas-liquid separator, 1
4... Exhaust pipe, 15... Vaporization accelerator.

Claims (2)

[Claims] (1) A heater composed of a heat exchanger that connects the upper header and the lower header, and a gas-liquid separator that is connected to the upper header by a gas pipe and from the bottom to the lower header by a liquid return pipe. and a radiator provided above the heater, an outgoing pipe connecting the gas-liquid separator and the radiator, and a return pipe connecting the lower header and the radiator, and an evaporative pipe inside. 1. A heat transfer device comprising a sealed circuit in which a heating medium is enclosed, and a vaporization accelerator for heating the heating medium is provided in the gas-liquid separator. (2) The heat transfer according to claim (1), further comprising a gas-liquid separator having a vaporization accelerator that heats a heat medium using waste heat from a heat source that heats the heater as a heat source of the vaporization accelerator. Device.