JPS6235036B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for extracting a medium attached to a condensing heat transfer surface, and more specifically, to an apparatus for effectively extracting a medium attached to an outer circumferential surface of a condensing tube placed in a vertical direction. Regarding.

2. Description of the Related Art A heat transfer promoting device is known in which high voltage metal wires are installed opposite to a condensing heat transfer surface so that the medium condensed and adhered to the heat transfer surface is drawn to the metal wires.

In the above-mentioned known heat transfer accelerator, an important issue is how quickly and easily the medium drawn to the metal wire can be discharged.

That is, when the medium is quickly discharged, the thickness of the medium film remaining on the heat transfer surface becomes thinner, and heat transfer is promoted.

However, the heat transfer surface is a tube, and no suitable discharge means has yet been provided to discharge the medium condensed on the outer peripheral surface of the tube.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a liquid extraction device for effectively discharging the condensed medium on the outer peripheral surface of a vertically placed heat exchanger tube.

This will be explained in detail below using figures.

FIG. 1 is a sectional view showing an example of a condensing heat exchanger to which the present invention is applied. FIG. 2 is an enlarged view of portion A in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG.

The condensing heat exchanger 1 has headers 2 and 3 on the upper and lower sides, and the headers 2 and 3 are connected through heat transfer tubes 4. The medium to be condensed enters through the inlet 5 and fills the casing 6. The medium condensed and deposited on the outer peripheral surface of the heat transfer tube 4 is collected at the lower part of the casing 6 and taken out from the outlet 7. The refrigerant for cooling the medium enters from the inlet 8 and flows out from the outlet 9.

The heat exchanger tube 4 is placed vertically, and four vertical lines 10 are provided around the heat exchanger tube in parallel with the heat exchanger tube 4 at approximately equal phase intervals.

In order to fix the vertical line 10, a plurality of ring wires 11 fixed to the vertical line 10 are provided in the vertical direction at appropriate intervals. Wrap around the heat transfer surface 4,
A spiral 12 is also provided which progresses downward. The spiral 12 is fixed to the vertical line 10,
It is installed facing the outer peripheral surface of the heat exchanger tube with a gap of 0.5 to 5 mm.

The lower end of the spiral 12 is fixed to another vertical wire 13 installed a little apart from the heat exchanger tube 4.
A predetermined number of spirals 12 are attached to the heat exchanger tube 4 in the longitudinal direction. The number varies depending on the length of the heat exchanger tube 4 and the spiral length, but the spiral 12
An example is one that is wound 480 degrees and has an attachment interval of 50 to 60 mm.

The operation of the present invention configured as described above will be explained below.

Steam entering from the inlet 5 condenses and adheres to the outer peripheral surface of the heat transfer tube 4. The spiral 12 has a high voltage of 4000V to 15000V, and this voltage is applied via the vertical line 10 or the vertical line 13. The vapor includes fluorocarbons, ammonia organic liquid, etc., and the condensate is drawn to the spiral 12. Therefore, the condensate flows down along the spiral 12 and falls from the end of the spiral 12 to the bottom inside the casing 6. vertical line 1
3 is not necessarily required, but is provided as a guide for the condensate dripping from the end of the spiral 12.

In the above embodiment, the spiral 12 is made up of one metal wire, but it may be made up of two metal wires spaced apart, for example, by 1 mm.

Further, it is desirable that the pitch of the spiral be dense in the upper part and sparse in the lower part.

Furthermore, the present invention is not limited to condensing heat exchangers, but can also be used to remove liquids such as oil flowing down the outer peripheral surface of pipes.

According to the present invention explained above, the following effects are produced.

The spiral allows the adhesion medium to be effectively removed from the entire outer circumferential surface of the heat exchanger tube.

Since the lower end of the spiral is located away from the heat exchanger tube, the medium dripped from the spiral end does not wet the heat exchanger tube.

In addition, according to the structure in which the lower end of the spiral is connected to the vertical line, the ejected medium is transferred to the vertical line,
Since the medium reliably falls along the vertical line, the medium is reliably discharged.

Furthermore, by appropriately selecting the spiral pitch, the speed of medium discharge can be controlled, and the amount of heat transfer can also be controlled.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing an example of a condensing heat exchanger to which the present invention is applied, Fig. 2 is an enlarged view of part A in Fig. 1, and Fig. 3 is a sectional view taken along line BB in Fig. 2. . 4: Heat exchanger tube, 12: Spiral.

Claims (1)

[Claims] 1. In a device in which a high-voltage metal wire is installed opposite the outer circumferential surface of a tube to draw a medium attached to the outer circumferential surface of the tube toward the metal wire, the tube is installed at least in the direction of gravity, and the metal wire The spiral is wound around the outer periphery of the tube as a spiral that progresses downward, and the radius of the spiral increases at the end of the winding, and the end of the spiral is connected to a vertical line placed in the tube direction, and the spiral extends in the longitudinal direction of the tube. One or more liquid draw-out devices are attached at predetermined intervals to the