JPS593608B2 - antifreeze device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing freezing of parts through which fluid passes, such as valves, pipes, and casings.

FIG. 1 is a front view of, for example, a water valve equipped with a conventional antifreeze device.

A pipe 1 is buried in the earth 3, and at a place where water is needed, the pipe 1 is lifted into the atmosphere and a valve 2 is attached to its tip.

What we often experience with water supply, especially in winter, is that the valve 2, which is lifted into the atmosphere, and the pipe 1' in its vicinity freeze, making it impossible to use water when needed.

For this reason, in the past, insulation material 4 was wrapped around them to keep them warm, but even if it was wrapped thickly, the valve 2 would still freeze on long winter nights in cold regions.

Another conventional method was to wrap a heater around the valve 2 and the pipe 1 in the vicinity and energize it to avoid freezing, but this was uneconomical due to high electricity costs.

The object of the present invention is to provide a simple antifreeze device which eliminates the above-mentioned drawbacks.

FIG. 2 is a front view showing an example of a water valve in which the antifreeze device of the present invention is applied.

This is done by enclosing the valve 2 and the nearby pipe 1' with one end of a sealed container 5, burying the other end of the sealed container 5 in the ground, and placing the liquid 6 (
For example, freon, etc.) are sealed.

In this way, the liquid 6 receives heat from the ground and evaporates.
Due to the vapor pressure difference, the vapor moves towards the valve and the pipe 1' in its vicinity, where it releases the latent heat of condensation and becomes liquid, and this condensate returns to the lower part of the closed container 5 by gravity.

Due to the evaporation and condensation of the liquid 6, the valve 2 and the pipe 1' in its vicinity are constantly receiving heat from the earth and are kept above the freezing point, so that the liquid flowing through them does not freeze.

At this time, it is necessary that the boiling point of the liquid 6 is below the underground temperature.

Furthermore, in order to make it easier to collect heat from the ground, fins 7 may be attached to the part of the airtight container 5 that is buried underground.

FIG. 3 shows another embodiment.

In the example shown in FIG. 2, underground heat is utilized, whereas in this case, the other end of the airtight container 5 is installed indoors in order to utilize heat indoors 10.

A porous material 8 (for example, gold steel, cloth, glass, wool) is placed on the inner wall of the closed container 5, the valve 2, and the pipe 1' near the valve.
is lined with liquid and is impregnated with liquid, so that even if the closed container 5 is bent, the condensed liquid can easily return to the heat-receiving part with fins by the capillary action of the porous material 8. This is the same as Fig. 2 in that it utilizes evaporation and condensation of liquid.

Figure 4 shows an application of this concept to the prevention of freezing of pumps.

One end side of the airtight container 5, which is a pump casing 20 lined with a porous material 8, is wound around the pump casing 20 in a helical shape, and the other end side is buried in the ground, and the impeller 21 inside the pump is wrapped around the pump casing 20 in a spiral manner.
This is to prevent it from freezing.

In the above embodiments, underground or indoor heat is used, but exhaust heat from equipment can also be used.

As a result of the improvements described above, it has become convenient to prevent freezing of parts where liquid flows without using electricity.

[Brief explanation of the drawing]

Figure 1 is a front view showing an example of a conventional antifreeze device;
The figure is a front view illustrating one embodiment of the antifreeze device of the present invention, and FIGS. 3 and 4 are views showing other examples of the antifreeze device of the present invention. 5... airtight container, 6... liquid, 7... fin, 8
...Porous material.

Claims (1)

[Claims] 1 A part of the part where the liquid flows is surrounded by one end of a sealed container filled with an evaporative liquid, and the other end of the sealed container is placed in a heat source at a temperature higher than the solidification temperature of the evaporative liquid. The anti-freeze device is characterized in that the heat of the heat source is transferred to a portion through which the liquid flows to prevent freezing by the evaporation and condensation action of the evaporative liquid.