KR20120113037A

KR20120113037A - A heat exchanger with a dual tube

Info

Publication number: KR20120113037A
Application number: KR1020110030708A
Authority: KR
Inventors: 홍성희
Original assignee: 주식회사 동화엔텍; 홍성희
Priority date: 2011-04-04
Filing date: 2011-04-04
Publication date: 2012-10-12

Abstract

PURPOSE: A heat exchanger with a double pipe is provided to easily remove drops from radiation fins in the winter by effectively transferring the heat of fluid flowing in an inner pipe to the radiation fins. CONSTITUTION: A heat exchanger with a double pipe comprises an inner pipe(10), an outer pipe(20), an aluminum refrigerant pipe(30), and radiation fins(40). The outer pipe is formed on the outer surface of the inner pipe. The aluminum refrigerant pipe is formed between the inner and outer pipes and has micro channels(32) and partition walls(34). Refrigerants flow in the micro channels. The radiation fins are formed on the outer surface of the outer pipe, and the heat of fluid flows in the inner pipe is transferred to the radiation fins through the partition walls of the aluminum refrigerant pipe and the outer pipe.

Description

A heat exchanger with a dual tube

The present invention relates to a double tube heat exchanger, and more particularly, to conduct heat to the heat of the fluid flowing in the inner tube to the heat dissipation fin through the partition wall and the exterior of the refrigerant pipe to effectively defrost the drip formed on the heat dissipation fin during winter heat exchanger operation. It relates to a double tube heat exchanger.

Generally, the heat pump is composed of a compressor, a condenser, an expansion valve, an evaporator, and a four-sided valve for converting the refrigerant flow path during the conversion of the heating and cooling operation. The refrigerant circulates these four components, and the compression, condensation, expansion, and evaporation processes are performed. It will be repeated. At this time, if the condensation heat of the condenser is used for heating operation, the endothermic evaporative heat is used for cooling operation.

However, the heat exchanger of the air heat source heat pump using the air heat source is installed outdoors. In this case, when the temperature of the air introduced from the outside during the heating operation of the heat pump is in the range of 0 to 5 degrees, due to the dew point of the outside air humidity Frost phenomenon occurs in the heat radiation fin of the outdoor heat exchanger, and low heat conduction characteristics of frost and interference of convective heat transfer due to direct contact between the heat radiation fin and the air greatly reduce the heat exchange ability. .

In addition, since the evaporation of the refrigerant flowing in the tube of the heat exchanger is not good at a temperature of less than minus 5 degrees, which is similar to the boiling point of the refrigerant, the performance of the heat exchanger is greatly reduced, and the liquid refrigerant flows into the compressor, resulting in a liquid compression. As it occurs, the load on the compressor increases greatly, which is the main cause of failure of the compressor.

The present invention has been made to solve the above problems, to provide a double tube heat exchanger that can effectively remove the drops formed on the heat dissipation fin of the outdoor heat exchanger when operating the heat pump in the cold winter air temperature. have.

In addition, to provide a sufficient evaporative heat supply to the refrigerant flowing in the tube to prevent performance degradation of the heat exchanger, and to provide a double tube heat exchanger in which the refrigerant is introduced into the compressor in a gaseous state so that the load acts small in the compressor. It has a purpose.

In order to achieve the above object, the present invention is a double tube heat exchanger, the inner tube; An exterior provided at the inner circumferential surface of the inner tube; An aluminum refrigerant pipe provided between the inner tube and the outer surface, the micro channel through which the refrigerant flows, and a partition wall partitioning the aluminum channel continuously formed by extrusion; And a heat dissipation fin provided on the outer circumferential surface of the outer shell, and formed of a precursor. The heat of the fluid flowing in the inner tube is conducted to the heat dissipation fin through the partition wall and the exterior of the refrigerant pipe to defrost frost formed on the heat dissipation fin.

The inner tube and the outer tube are made of a copper material.

According to the present invention having the above-described configuration, the following effects can be expected.

First, the refrigerant tube is installed between the inner tube and the outer tube, and the heat of the fluid flowing in the inner tube is effectively conducted to the heat dissipation fin through the partition wall and the outer tube of the refrigerant tube to easily remove the accumulated drop generated in the heat dissipation fin of the heat exchanger in winter. You can do it.

In addition, the heat of the fluid flowing in the inner tube is transferred to the refrigerant flowing in the refrigerant pipe to supply a sufficient heat source so that the refrigerant is sufficiently vaporized to prevent the load of the compressor.

In addition, the inner and outer circumferences of the inner and outer circumferential surfaces of the aluminum refrigerant tube are wrapped with copper to prevent the refrigerant tube from being damaged during the rolling fin rolling process, and damage from the pressure caused by the flow of the refrigerant in the refrigerant tube and the fluid in the inner tube. You can prevent it.

1 is a perspective view of a double tube heat exchanger according to an embodiment of the present invention.
2 is a perspective exploded view of FIG. 1;
3 is a cross-sectional view taken along line AA ′ of FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view of a double tube heat exchanger according to an embodiment of the present invention, FIG. 2 is a perspective exploded view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA ′ of FIG. 1.

1 and 2, the present invention is largely composed of the inner tube 10, the outer tube 20, the coolant tube 30 and the heat dissipation fin 40 in the double tube heat exchanger.

The inner tube 10 is made of a copper material so that the heat source of the fluid flowing therein is thermally conducted to the coolant tube 30, the exterior 20, and the heat dissipation fin 40.

Here, the inner tube 10 is a high-temperature fluid flow, but any heat source supply may be installed separately from the outside, in the case of the present invention, it is preferable to be able to supply the heat source permanently using geothermal or waste heat.

The exterior 20 is provided on the outer circumferential surface of the inner tube 10 and is formed of the same material, and serves as a heat transfer tube to transfer the heat transferred from the inner tube 10 to the heat dissipation fins 40.

The refrigerant pipe 30 is provided between the inner tube 10 and the outer tube 20 to absorb the heat of the fluid flowing in the inner tube 10, it can be delivered to the outer tube (20).

Here, the coolant pipe 30 is made of aluminum extruded in the longitudinal direction so that the microchannel 32 and the partition wall 34 partitioning the coolant flows in a continuous direction, and the row of the inner pipe 10 into the partition wall 34. The exterior 20 becomes conductive, and the refrigerant flowing in the microchannel 32 absorbs the heat of fluid in the inner tube 10.

The heat dissipation fins 40 are provided on the outer circumferential surface of the exterior 20, and are manufactured in a high finned tube method by a rolling operation so that the tube and the fins are integrally formed to emit heat by air cooling. It is preferable to provide a cooling fan (not shown) around the heat dissipation fin 40 so that cooling can be efficiently performed.

The components are sequentially coupled to the inner tube 10, the refrigerant tube 30, the exterior 20 and the heat dissipation fin 40 from the center to the heat conduction is made, the fluid and the refrigerant tube of the inner tube 10 The refrigerant in 30 is heat transfer.

On the other hand, the inner tube 10 and the outer tube 20 is formed of a copper material, it is possible to protect the refrigerant tube 30 of aluminum material relatively weaker than the strength of the inner tube 10 and the outer tube 20.

That is, the inner tube 10 and the outer shell 20 are surrounded by the same material as the inner and outer circumferential surfaces of the refrigerant tube 30 made of aluminum to prevent the refrigerant tube 30 from being damaged during the heat sink fin 40 rolling process. It is possible to prevent the refrigerant pipe 30 from being damaged by the pressure caused by the flow of the refrigerant of the coolant 30 and the fluid of the inner tube 10.

In the above described the components and coupling of the present invention, the double tube heat exchanger, and in the following will be described with reference to Figure 3 in order to explain the heat transfer by the components in detail.

Referring to FIG. 3, the heat of the fluid flowing in the inner tube 10 is moved to the refrigerant tube 30, wherein the refrigerant tube 30 is formed of aluminum extrusion to partition the micro channel 32. The partition wall 34 is formed continuously, through which the heat of the fluid of the inner tube 10 passes through the exterior 20 to the heat dissipation fins 40 efficiently.

As a result, heat is supplied to the frost generated in the heat dissipation fins 40 during the winter heat exchanger to effectively defrost.

In addition, the heat of the fluid of the inner tube 10 is transferred to the refrigerant flowing in the microchannel 32, wherein the refrigerant obtains latent heat of evaporation, so that the refrigerant is efficiently vaporized and supplied to the compressor, thereby preventing a load on the compressor. .

On the other hand, if the air heat source is sufficient, it can be used to block the fluid flowing in the inner tube 10, and if a drop (積霜) occurs during winter heating operation by installing a sensor to flow the fluid in the inner tube (10) There are several advantages to running the heat pump efficiently and efficiently.

As described above, the present invention improves the heat exchange ability of the outdoor heat exchanger mainly using an air heat source by thermally conducting heat of the fluid flowing in the inner tube to defrost the droplets generated on the heat dissipation fins, and also uses the heat transfer of the fluid. It can be seen that it is a basic technical idea to provide a double tube heat exchanger that supplies a latent heat of evaporation to the refrigerant to enable a stable heat pump operation due to a small load on the compressor. Within the scope of ideas, of course, many other variations are possible to those of ordinary skill in the art.

10: Interior 20: Appearance
30: refrigerant pipe 32: micro channel
34: partition 40: heat dissipation fin

Claims

In a double tube heat exchanger,
Inner tube 10;
An exterior 20 provided on the inner circumferential surface of the inner tube;
An aluminum refrigerant pipe (30) provided between the inner tube and the outer surface, wherein the microchannel 32 through which the refrigerant flows, and the partition wall 34 partitioning the refrigerant channel are continuously formed by extrusion; And
It is provided on the outer peripheral surface, the heat radiation fin 40 formed by a roll; consisting of the heat of the fluid flowing in the inner tube is heat conduction to the heat radiation fin through the partition wall and appearance of the refrigerant pipe to defrost the frost formed on the heat radiation fin Double tube heat exchanger.

The method of claim 1,
The inner tube 10 and the exterior 20,
Double tube heat exchanger, characterized in that formed of the same material.