KR20110104141A

KR20110104141A - Internal heat exchanger of cross spiral

Info

Publication number: KR20110104141A
Application number: KR1020100023089A
Authority: KR
Inventors: 정현호
Original assignee: 정현호
Priority date: 2010-03-16
Filing date: 2010-03-16
Publication date: 2011-09-22

Abstract

The present invention improves the cooling performance by using the difference in thermal energy of the refrigeration system itself as a device for saving energy to increase the efficiency of the refrigeration system. It relates to a configuration method and a manufacturing method of a device for lowering the temperature of the high-pressure warm refrigerant entering the evaporator (expansion valve) by using the cold low-pressure refrigerant passed through the evaporator.
To this end, the present invention by using two pipes of different diameters to process the surface shape of the radial grating structure on a small diameter pipe to increase the cross-sectional area per unit length to increase the heat exchange efficiency and easy bending process by the wrinkles of the grid product The production is advantageous.

Description

Double tube refrigeration system heat exchanger with radial folds {Internal Heat Exchanger of Cross spiral}

The present invention is a heat exchange device for improving the efficiency of the refrigeration system by using a low-temperature refrigerant from the evaporator to absorb the heat of the high-temperature refrigerant entering the evaporator to obtain a more powerful cooling efficiency of the double pipe having a radial inner pipe The structure and manufacturing method of the heat exchanger

In general, in the refrigeration cycle, the circulation of the refrigerant consists of compressor → condenser → expansion valve → evaporator, which absorbs and discharges heat through the cycle of adiabatic compression → heat radiation → pressure reduction → evaporation.

However, when looking at the state of the thermal energy of the refrigeration cycle, the low-pressure refrigerant after the evaporator is a supercooled state and the high-pressure refrigerant after the condenser remains a factor that lowers the refrigeration efficiency due to insufficient heat radiation.

For example, condensation occurs due to condensation of moisture in the atmosphere in the pipe of the refrigerant passing through the evaporator, and the high-pressure refrigerant passing through the condenser is not sufficiently radiated and warmer than the atmospheric temperature in an overheated state.

Accordingly, the present invention utilizes two metal tubes with excellent thermal conductivity to form a double grooved heat exchanger that lowers the temperature of the high-pressure refrigerant by using a cold low-pressure refrigerant to form a radial groove to increase the heat transfer area to improve the heat exchange capacity. The purpose is to provide a method for constructing.

The present invention provides a pipe processing method for making an inner passage that can easily exchange heat while high-pressure refrigerant flows smoothly between inner and outer pipes, and a double tube heat exchanger through assembly of inner and outer pipes.

The present invention forms a conduit through which a high-pressure refrigerant flows into a gap by a processing groove when assembling an outer pipe by processing a radial groove on an outer surface of an inner pipe having a smaller diameter among two metal pipes having different diameters.

Radial protrusions remaining during the groove forming induce the flow of the refrigerant into the turbulent flow and maximize the heat exchange area by securing a large surface area.

The connection between the outer pipe of the double pipe and the high pressure pipe of the refrigeration system has a protrusion for restricting the insertion depth of the pipe so as not to affect the flow of the refrigerant.

In addition, when the gap between the outer pipe and the inner pipe of the part connected with the high pressure pipe is small, expand the connection of the outer pipe and connect it.

The present invention has a radial groove in the inner pipe, which has a large heat exchange area per unit, induces a flow of refrigerant into turbulent flow, thereby achieving effective heat exchange, and secures a plurality of pipelines to minimize the flow resistance of the refrigerant. Can be produced in the configuration.

1 is a schematic and partial cross-sectional view of a double tube heat exchanger with radial grooves;
2 is a schematic diagram of a refrigeration system in which the present invention is used;
3 is a schematic view of a pipe processing method with radial grooves;
4 is a pipe shape with radial grooves
5 is a cross-sectional view of an internal pipe shape having a refrigerant distribution and an assembly groove;
6 is a connection diagram of the high pressure pipe and the outer pipe having a stop

The present invention will now be described in detail with reference to the accompanying drawings.

2 shows a refrigerant flow as an example of a refrigeration system. In the refrigerant flow of the conventional refrigeration system, the refrigerant passing through the evaporator is moved to the compressor through the low pressure pipe. At this time, the outside of the low pressure pipe is in contact with the atmosphere or insulation (anti-condensation).

As such, if the heat exchanger cools the high-temperature refrigerant from the condenser using the low-temperature refrigerant from the evaporator, the cooling performance can be increased.

1 is a schematic diagram of a double tube heat exchanger to maximize the contact area with the refrigerant to achieve efficient heat exchange in a small section, and to improve the heat exchange effect by turbulent refrigerant flow. Therefore, if a large number of radial grooves are formed in the inner pipe, the overall contact area is increased, thereby improving heat exchange efficiency.

Claims

Double pipe heat exchanger with radial grooved inner pipe used in refrigeration system and method for manufacturing same

Inner pipe with radial grooves according to claim 1

The double pipe according to claim 1, wherein the clearance between the radial projection (the largest diameter) and the inner diameter of the outer pipe is 0 to 30% of the outer diameter of the inner pipe.

The inner pipe according to claim 2, wherein the depth of the radial groove is 1 to 15% of the outer diameter of the inner pipe.

Inner pipe according to claim 2, having grooves at the beginning and end of the radial grooves for the distribution and collection of high-pressure refrigerant

As a pipe processing method having a radial groove, a radial groove is formed through the first and second rotational processing of the pipe outer wall.