JPH03213997A - Apparatus for heat transfer - Google Patents

Abstract

PURPOSE:To simplify the constitution and reduce the cost by forming an apparatus for heat transfer of a heater in which an upper header has a longer dimension and a larger inner volume than a lower header, a radiator placed upward, and a forward pipe and a backward pipe both of which connect the heater and heat discharger so that these four can form a closed circuit. CONSTITUTION:In a heater 4, an upper header 1 has a longer dimension and a larger volume than a lower header 2, a vertical passage 3 is provided between the headers 1 and 2, and a liquid return pipe 6 is arranged from the bottom of the header 1 to an end of the header 2. A radiator 8 is placed upward of the heater 4. Vaporable heat medium 11 is sealed within a closed circuit formed by the connection of the header 1, a forward pipe 9, the header 2 and a backward pipe 10 in this order. In this constitution, the heat medium 11 heated by the heater 4 vapors and flows into the radiator 8, in which it condensed for discharging heat, turns into a liquid and descends to the header 2. As the header 1 can separate gas from liquid, a stable heat transfer can be obtained with a simple constitution.

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 As shown in FIG. 3, a conventional heat transfer device of this type includes a heater 4 having a plurality of vertical passages 3 connecting an upper header 1 and a lower header 2, and a heater 4 connected to the upper header 1. A gas-liquid separator 7 connected via a gas pipe 5 and a liquid return pipe 6 connected to the lower header 2, a radiator 8 provided above the heater 4, and a heat radiator between the gas-liquid separator 7 and the ! ! ! 8
The structure was such that an evaporative heat medium 11 was sealed in a closed circuit constituted by an outgoing pipe 9 that connected to the radiator 8 and a return pipe 10 that connected the radiator 8 and the liquid return pipe 6.

That is, when the heater 4 is heated, the internal evaporative heating medium 11 evaporates, and the gas and liquid become two-phase, which passes through the gas pipe 5 and is separated into gas and liquid by the gas-liquid separator 7, and the gas is separated into gas and liquid. It is led to the radiator 8 through the outgoing pipe 9. 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 in the radiator 8 condenses and liquefies to radiate heat. The liquid in the radiator 8 passes through the return pipe lO by the action of gravity, joins the liquid in the gas-liquid separator 7 in the liquid return pipe 6, returns to the lower header 2 in the heater 4, is heated again, evaporates, and condenses. By repeating this, it will circulate in the closed circuit.

Problems to be Solved by the Invention However, with such a structure, the liquid in the gas-liquid separator 7 and the liquid condensed in the radiator 8 meet in the liquid return pipe 6, so that the evaporative heat medium In order to maintain good circulation in the liquid return pipe 6, it is necessary to reduce the flow resistance of the liquid return pipe 6, which requires increasing the pipe diameter, and the structure becomes complicated. Furthermore, since the gas pipe 5 and the liquid return pipe 6 are connected to the same side of the heater 4, when the amount of heating increases, phenomena such as uneven temperature distribution and abnormal temperature rise occur.
There were issues such as being unable to drive.

The present invention solves these conventional problems, and aims to simplify the structure, maintain uniform temperature distribution of the heater, prevent abnormal temperature rise, and realize stable operation. be.

Means for Solving the Problems In order to solve the above problems, the heat transfer device of the present invention includes a lower header, an upper header that is longer than the lower header and has a larger internal volume, and a plurality of parts that connect the lower header and the upper header. A heater is constituted by a vertical flow path, a liquid return pipe connecting the bottom of the upper header and an end of the lower header, and a rectifying plate provided inside the upper header,
A radiator is provided above the heater, and the upper header on the side where the liquid return pipe is connected is connected to the radiator by the outgoing pipe,
The lower header and the radiator on the side opposite to the side to which the liquid return pipe is connected are connected by a return pipe to form a sealed circuit, and an evaporative heat medium is sealed inside.

According to the above-described structure, the heat medium heated and evaporated in the vertical flow path of the heater flows into the upper header in a gas-liquid two-phase state, where the gas and liquid are separated by the rectifying plate, and the liquid is passed through the liquid return pipe. It is returned to the bottom by 2 goo. On the other hand, the gas flows into the radiator through the outgoing pipe and condenses, and the liquefied liquid is returned to the lower header through the returning pipe under the action of gravity.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIGS. 1 and 2, 1 is an upper header that is longer and has a larger volume than the lower header 2, and has a rectifier Fi inside.
12 are provided. On the other hand, a plurality of vertical flow paths 3 are provided between the upper header 1 and the lower header 2, and a liquid return pipe 6 is provided from the bottom of the upper header 1 to the end of the lower header 2 to form a heater 4. has been done. Furthermore, a radiator 8 is provided above the heater 4, and a liquid return pipe 6
The upper header l and the radiator 8 are connected to the outgoing pipe 9.
The end of the lower header 2 facing the side to which the liquid return pipe 6 is connected and the radiator are connected by the return pipe lO. An evaporative heating medium such as is enclosed.

In the above configuration, the heating medium 11 heated in the vertical flow path 3 in the heater 4 evaporates, flows into the upper header 1 in a gas-liquid two-phase state, and is separated into gas and liquid by the rectifier plate 12. The liquid in the upper header 1 is returned to the lower header 2 through the liquid return pipe 6, and the gas flows into the radiator 8 through the outgoing pipe 9, condenses and radiates heat, and the liquefied liquid is returned by the action of gravity. It is dropped through the tube 10 into the lower header 2. Therefore, it becomes possible to separate gas and liquid using the upper header 1, and stable heat transfer can be performed with an extremely simple structure.

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

(1) By increasing the volume of the upper header and installing a rectifying plate inside, it is possible to separate gas and liquid, and there is no need to provide a separate gas-liquid separator, simplifying the structure and making it an inexpensive heat transfer device. can be realized.

(2) Since the liquid return pipe and return pipe are connected separately to both ends of the lower header, the flow distribution in the vertical flow path is made uniform and the temperature distribution is also made uniform, which prevents abnormal temperature rises. can.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a heat transfer device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line A--A in FIG. 1, and FIG. 3 is a block diagram of a conventional heat transfer device. ■... Upper header, 2... Lower header, 3... Vertical channel, 4... Heater, 6... Liquid return Pipe, 8 --- Heat radiator, 9
...Outbound pipe, 1o...Return pipe, 11...
...heating medium, 12... rectifier plate.

Claims (1)

[Claims] a lower header, an upper header that is longer and has a larger internal volume than the lower header, a plurality of vertical channels that connect the lower header and the upper header, and a liquid that connects the bottom of the upper header and the end of the lower header. a return pipe;
A heater including a rectifying plate provided inside the upper header, a radiator provided above the heater, and the upper header and the radiator on the side to which the liquid return pipe is connected. An evaporative heat medium is placed inside a sealed circuit configured by an outgoing pipe that connects and a return pipe that connects the end of the lower header opposite to the side to which the radiator and the liquid return pipe are connected. Enclosed heat transfer device.