JPS6344689Y2 - - Google Patents

Description

[Detailed description of the invention] a. Purpose of the invention (industrial application field) The steam condenser according to this invention condenses water vapor generated when water is heated and evaporated in the water jacket of a water-cooled engine, for example. liquefy,
It can be used to put it back into the water jacket.

(Conventional technology) To cool thermal equipment such as engines that reach high temperatures,
For example, a steam condenser that removes the heat generated by this thermal equipment and evaporates the steam, exchanges heat with the atmosphere, condenses it, and liquefies it, and sends it back to the heating equipment is disclosed in Japanese Utility Model Application Publication No. 54-6434, for example. , No. 57-15919, No. 59
It is widely known as seen in Publication No. -5713.

As shown in FIG. 3, this steam condenser has an upper tank 4 and a lower tank 5 fixed above and below a core part 3 consisting of a large number of heat transfer tubes 1, 1 and fins 2, 2, respectively. One end of a steam pipe 8 is connected to a steam outlet of a thermal device such as an engine 7, and the other end is connected to a steam inlet 6 provided in an upper tank 4. Further, a water supply pipe 10, which has one end connected to a water outlet 15 provided in the lower tank 5 and has a liquid feed pump 9 installed in the middle, is connected to the water inlet of the above-mentioned thermal equipment (water jacket of the engine 7). . A water level sensor 11 is installed in the lower tank 5.
is provided. The signal from the water level sensor 11 is input to the controller 12, and the controller 12 operates to operate the liquid pump 9 only when the water level in the lower tank 5 is above a certain level.

The water vapor generated from the water jacket of the engine 7 is sent to the upper tank 4 of the steam condenser through the steam pipe 8, and flows through the core part 3 in the front and back directions of the drawing while flowing down the many heat transfer tubes 1, 1. It condenses through heat exchange with the air, and accumulates in the lower tank 5. When the water level of the condensed water 13 in the lower tank 5 reaches a certain level or higher, the liquid feeding pump is started and the condensed water 13 is returned to the water jacket of the engine 7.

(Problems to be Solved by the Invention) However, the conventional steam condenser constructed and used as described above has the following disadvantages.

That is, the water vapor sent into the steam pipe 8 from the water jacket of the engine 7 may contain fine water droplets that cannot be completely vaporized, but these water droplets are passed along with the steam through the steam inlet 6 to the upper tank 4.
sent inside. The upper end of each heat exchanger tube 1, 1, which has passed through the seat plate 14 for fixing the upper tank 4 to the upper end of the core part 3 in an airtight and liquid-tight manner, is slightly away from the upper surface of the seat plate 14, as shown in FIG. Because it stands out,
The water droplets sent into the upper tank 4 are absorbed by this seat plate 14.
The heat exchanger tubes 1, which constitute the core part of the steam condenser, eventually leak from the upper end opening of each heat exchanger tube 1, 1.
1. However, the water droplets that have flowed into the heat exchanger tubes 1, 1 adhere to the inner circumferential surfaces of each heat exchanger tube 1, 1, and the heat generated between the water vapor flowing inside each heat exchanger tube 1, 1 and the air flowing outside. This is not preferable because it worsens exchange efficiency.

The object of the present invention is to provide a steam condenser that does not cause performance deterioration due to water droplets sent into the upper tank without being evaporated.

b. Structure of the invention (means for solving the problem) In the condenser of the invention, a core part is formed with a large number of fins, and the steam sent from the steam inlet into the upper tank is transferred to the lower tank having a water outlet. Among the large number of heat exchanger tubes flowing down toward the tank, the upper end edges of some of the heat exchanger tubes are located below the upper end edges of most of the remaining heat exchanger tubes.

That is, as shown in FIG. 1, the upper ends of some of the heat exchanger tubes 1a are connected to the seat plate 14 among the many heat exchanger tubes that constitute the core part 3 together with the fins 2 (omitted in FIG. 1).
Either it does not protrude from the top surface of the plate, or the amount of protrusion is reduced. For this reason, the upper end edges of some of the heat exchanger tubes 1a are positioned below the upper end edges of most of the remaining heat exchanger tubes 1,1.

Heat exchanger tube 1 with the upper edge positioned downward in this way
Although the number of a and la depends on the size of the condenser, it is usually sufficient to provide about 6 to 8 condensers. For example, when six such heat exchanger tubes 1a, 1a are provided, it is preferable to provide them at the four corners and the center of the seat plate 14, as shown in FIG.

(Function) Since the steam condenser of the present invention is constructed as described above, water droplets that are sent through the steam pipe 8 without being evaporated and that have entered the upper tank 4 through the steam inlet are collected from the seat plate 14. The water flows over the upper surface of the water, flows into some of the heat exchanger tubes 1a, 1a, and is directly sent toward the lower tank 5 having a water outlet. Therefore, the water droplets that have flowed into the upper tank 4 do not accumulate on the upper surface of the seat plate 14 to the extent that they flow into most of the other heat exchanger tubes 1, 1, and the water droplets that have flowed into the upper tank 4 do not accumulate on the upper surface of the seat plate 14 to the extent that they flow into most of the other heat exchanger tubes 1, 1. Only steam flows in from the upper end openings of the tubes 1,1.

c. Effects of the invention Since the steam condenser of the invention is configured and operates as described above, there is no possibility that unevaporated liquid will flow into most of the heat transfer tubes and impede heat exchange between steam and air. , the efficiency of the steam condenser can be improved.

[Brief explanation of the drawing]

Figure 1 is A of Figure 3 showing the steam condenser of the present invention.
2 is a schematic plan view of the seat plate passing through the heat transfer tube, FIG. 3 is a schematic front view showing the steam condenser in use, and FIG. 4 is a schematic front view showing the conventional steam condenser. FIG. 1 is a cross-sectional view similar to FIG. 1; 1, 1a: heat exchanger tube, 2: fin, 3: core part,
4: Upper tank, 5: Lower tank, 6: Steam inlet,
7: Engine, 8: Steam pipe, 9: Liquid pump, 1
0: Water supply pipe, 11: Water level sensor, 12: Controller,
13: Condensed water, 14: Seat plate, 15: Water outlet.

Claims (1)

[Scope of utility model registration request] In a steam condenser, an upper tank having a steam inlet and a lower tank having a water outlet are provided above and below a core portion consisting of a large number of heat transfer tubes and fins via seat plates, respectively. Among the large number of heat exchanger tubes whose upper ends are opened into the upper tank through the upper tank, the upper edges of some of the heat exchanger tubes are located lower than the upper edges of most of the remaining heat exchanger tubes. Features a steam condenser.