JP4381635B2 - Full liquid double tube cooler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus associated with a refrigeration machine .
[0002]
[Prior art]
In fluorocarbon refrigerant flooded cooler using, it requires the liquid level control of complex oil return device and the refrigerant to return to the refrigerator refrigerator lubricating oil from the liquid-filled condenser, the device The required amount of refrigerant increases and the operation control of the entire facility is complicated.
[0003]
[Problems to be solved by the invention]
A full-liquid double-tube cooler that does not require oil level control and liquid level control of the refrigerant, requires a small amount of refrigerant, and is easy to control.
[0004]
[Means to solve the problem]
Adds a full liquid function to the conventional double tube type cooler, and uses a natural fall method for oil return.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The refrigerant liquid 10 decompressed by the automatic expansion valve and supplied through the refrigerant inlet pipe 1 fills the refrigerant pipe 8 of the double pipe type cooler 7, passes through the refrigerant connection pipe 3 together with the partially evaporated refrigerant vapor 11, and flows downward. Since the lubricating oil of the refrigerator that has fallen into the refrigerant pipe 8 of the double pipe cooler 7 and mixed with the refrigerant liquid 10 at this time has a specific gravity smaller than that of the chlorofluorocarbon refrigerant, it is located on the upper surface of the refrigerant liquid 10. It drops to the refrigerant pipe 8 below the refrigerant liquid 10, which makes the oil return method the same as the dry type, and does not require a complicated oil return device and the liquid level control of the refrigerant. The pipe 9 is brought into close contact with the bottom surface of the refrigerant pipe 8, and the refrigerant connection pipe 3 is connected to the refrigerant pipe 8 so that the upper surface of the liquid pipe 9 to be cooled becomes the upper limit of the refrigerant liquid with the upper portion of the refrigerant pipe 8 as a passage for the refrigerant vapor 11. As a result, the outer surface of the liquid pipe 9 to be cooled is filled with the refrigerant liquid 10, Heavy tubular cooler 7 becomes refrigerant requirements less full liquid type double-pipe cooler.
[0006]
【The invention's effect】
The control of the apparatus is simplified compared to the conventional full liquid cooler, and the required amount of refrigerant is reduced to about 1/3 when compared on the same scale. Although the cooler for producing a cooling water were charged water foods stainless steel is often used, stainless steel about 1/15 the thermal conductivity of copper compared to about 1/8 and carbon steel aluminum Niu arm even as low as about 1/2, when used in a dry cooler for heat efficiency compared with the liquid-filled drops, stainless steel pipes for use in a dry cooler is primarily a tube diameter of about 20mm is used The The thermal efficiency of the full liquid double pipe cooler is not affected by the pipe diameter and is almost uniform.When cooling sewage mixed with solids, the pipe diameter is set according to the size of the solids. The problem of clogging solids in the cooling pipe can also be solved. When manufacturing food cooling water and feed water, set the pipe diameter to ensure the passage of cold water even if some freezing occurs in the liquid pipe to be cooled, control the refrigerant evaporation pressure of the cooler, and cool water of the cooler It is also possible to produce cold water close to the ice temperature by controlling the capacity of the refrigerator according to the inlet temperature and the discharge pressure of the cold water circulation pump.
[Brief description of the drawings]
FIG. 1 is an elevational and sectional view of a full-liquid double-tube cooler showing an embodiment of the present invention .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Refrigerant inlet pipe 2 Refrigerant outlet pipe 3 Refrigerant connection pipe 4 Cooled liquid inlet pipe 5 Cooled liquid outlet pipe 6 Cooled liquid connection pipe 7 Double pipe type cooler 8 Refrigerant pipe 9 Cooled liquid pipe 10 Refrigerant liquid 11 Refrigerant Steam 12 Liquid to be cooled

Claims (1)

In a double-tube type condenser, fluorocarbon refrigerant pipe outer, inner and the cooling liquid pipe, the target coolant tube in close contact with the bottom surface of the fluorocarbon refrigerant pipe, the refrigerant vapor above the fluorocarbon refrigerant pipe a passage, the by connecting the refrigerant connection pipe to the upper surface of the cooling liquid pipe is an upper limit of the fluorocarbon refrigerant liquid to the refrigerant pipe, for lubricating oil of the refrigerator is smaller specific gravity than the fluorocarbon refrigerant liquid The full liquid type, wherein the oil return method is located on the top surface of the chlorofluorocarbon refrigerant liquid and dropped into a refrigerant pipe below the chlorofluorocarbon refrigerant liquid, and the natural oil return method is the same as the dry type. Double tube cooler.

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