KR101260223B1 - Multi-pipe of a heat exchanger and making a method for the same - Google Patents

Abstract

PURPOSE: A multi-tube heat exchanger and a manufacturing method thereof are provided to control super-cooling and super-heating degrees by being installed in a refrigerating cycle heat pump system. CONSTITUTION: Pipes(430) are inserted into multiple through-holes formed on one end of a header(420). The pipes are welded when being inserted into the through-holes of the header, and are arranged into a case(410). Fixing grooves(411) are formed on the exterior of the case in order to fix the header. Both sides of the case have a hemispherical shape to control the flow of a refrigerant.

Description

Multi-pipe of a Heat exchanger and Making a method for The Same}

The present invention relates to a multi-pipe heat exchanger and a method for manufacturing the same, and more particularly, a header having a plurality of pipes fixed therein is provided in the case, and both sides of the case are drawn to form an integrated body, thereby simplifying by a simple process. The present invention relates to a multi-tube heat exchanger formed in one piece and applied to a binary refrigeration cycle heat pump system to control the overall supercooling degree and superheat degree, and a manufacturing method thereof.

The heat pump is configured by connecting a compressor, a four-way valve, an indoor heat exchanger, an expansion valve, an outdoor heat exchanger, and the four-way valve in order with a conduit, and connecting the four-way valve and the compressor with a suction conduit. The four-way valve is operated so that the high-temperature / high-pressure refrigerant vapor compressed by the compressor flows to the indoor heat exchanger side, condensing the high-temperature / high-pressure refrigerant vapor in the indoor heat exchanger acting as a condenser, and heats the condensation heat with the fluid. It generates or heats indoor air to perform heating or drying function, and expands the high-temperature and high-pressure refrigerant condensed in the indoor heat exchanger in an expansion valve, and then uses air (outside air) as a heat source in an outdoor heat exchanger acting as an evaporator. After evaporation, the refrigerant vapor is cooled to low temperature and low pressure, and then sucked into the compressor and the above cycle is repeated.

In the cooling operation, the four-way valve is operated so that the high-temperature / high-pressure refrigerant vapor compressed by the compressor flows to the outdoor heat exchanger, and condenses the air as a heat source in the outdoor heat-exchanger, which acts as a condenser. After expanding the high-temperature and high-pressure refrigerant condensed in the outdoor heat exchanger in the expansion valve, the refrigerant is evaporated in the indoor heat exchanger acting as an evaporator to absorb the evaporation heat from the fluid to generate cold water or to cool the indoor air to cool. The low temperature and low pressure refrigerant vapor evaporated in the indoor heat exchanger is sucked into the compressor and the above cycle is repeated.

When the heat pump method is applied to a binary cycle, it is adopted to show stable and continuous performance in the heating operation mode.

However, there is a disadvantage in that the capacity of the two cycles is different due to the difference in heat transfer between the two refrigerants represented by this binary cycle, and in this case, the capacity between the two cycles is different in the one-way operation, that is, only for heating operation or cooling operation. In the case of the heat pump, the mutual load is a disadvantage.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

A header having a plurality of pipes fixed therein is provided in the case, and both sides of the case are drawn to form an integrated body, which is simply formed by a simple process. It is an object of the present invention to provide a multi-tube heat exchanger for controlling and a method for manufacturing the same.

In order to achieve the above object, the present invention is a method for manufacturing a multi-pipe heat exchanger applied to a binary refrigeration cycle heat pump system,

Inserting pipes through which refrigerant is transferred into a plurality of through holes formed at one end of the header, respectively (S100);

Welding the pipe integrally in the state where the pipe is inserted into the through hole of the header (S200);

A step in which the pipe welded header is inserted into the case and provided (S300);

A fixing groove is formed on the outside of the case in a state where the header is provided therein, and the fixing groove is formed inside the case to fix the header at a proper position (S400);

After fixing the header, the refrigerant is concentrated in one place or the two sides of the case is drawn to be integrally formed so as to be integrally formed (S500); manufacturing method of a multi-tube heat exchanger comprising a It is about.

As described above, the multi-pipe heat exchanger of the present invention and the manufacturing method according to the present invention are provided with a header having a plurality of pipes fixed in the case, and by drawing both sides of the case to form an integrated, simply by a simple process It is formed integrally and applied to a binary refrigeration cycle heat pump system to control the overall supercooling and superheating degree.

1 is a perspective view showing a multi-tube heat exchanger according to an embodiment of the present invention,
Figure 2 is a cross-sectional view showing a multi-tube heat exchanger according to an embodiment of the present invention,
3 is an enlarged view illustrating a portion A of FIG. 2;
Figure 4 is a perspective view showing a header of a multi-pipe heat exchanger according to an embodiment of the present invention,
5 to 6 is a schematic view showing the production of a multi-tube heat exchanger according to an embodiment of the present invention,
7 is a flowchart illustrating a method of manufacturing a multi-tube heat exchanger according to an embodiment of the present invention.
Figure 8 is a schematic diagram showing a dual refrigeration cycle heat pump system to which a multi-pipe heat exchanger according to an embodiment of the present invention is applied.

The present invention has the following features to achieve the above object.

The present invention is a method for manufacturing a multi-pipe heat exchanger applied to a binary refrigeration cycle heat pump system,

Inserting pipes through which refrigerant is transferred into a plurality of through holes formed at one end of the header, respectively (S100);

Welding the pipe integrally in the state where the pipe is inserted into the through hole of the header (S200);

A step in which the pipe welded header is inserted into the case and provided (S300);

A fixing groove is formed on the outside of the case in a state where the header is provided therein, and the fixing groove is formed inside the case to fix the header at a proper position (S400);

After the header is fixed, both sides of the case are drawn and formed integrally so that the refrigerant is concentrated in one place or diffused in multiple directions (S500).

The present invention having such characteristics can be more clearly described by the preferred embodiments thereof.

Before describing the various embodiments of the present invention in detail with reference to the accompanying drawings, it can be seen that the application is not limited to the details of the configuration and arrangement of the components described in the following detailed description or shown in the drawings. will be. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front," "back," "up," "down," "top," "bottom, Expressions and predicates used herein for terms such as "left," " right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation. Also, terms such as " first "and" second "are used herein for the purpose of the description and the appended claims, and are not intended to indicate or imply their relative importance or purpose.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a perspective view showing a multi-tube heat exchanger according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a multi-tube heat exchanger according to an embodiment of the present invention, Figure 3 is an enlarged view showing a portion A of FIG. 4 is a perspective view illustrating a header of a multi-tube heat exchanger according to an embodiment of the present invention, and FIGS. 5 to 6 are schematic views illustrating the manufacture of a multi-tube heat exchanger according to an embodiment of the present invention. 7 is a flowchart illustrating a method of manufacturing a multi-pipe heat exchanger according to an embodiment of the present invention, and FIG. 8 is a schematic view of a dual refrigeration cycle heat pump system to which a multi-pipe heat exchanger is applied according to an embodiment of the present invention.

As shown in Figures 1 to 8, the manufacturing method of the multi-tube heat exchanger of the present invention is a multi-tube heat exchanger 400 is applied to a binary refrigeration cycle heat pump system, the case 410 and the header 420 And a pipe 430, the invention relates to a method of manufacturing the components. At this time, the description of the structure of the case 410, the header 420, and the pipe 430 will be described while explaining the manufacturing method.

First, as shown in FIGS. 5 and 7, pipes 430 through which refrigerant is transferred are inserted into a plurality of through holes 421 formed at one end surface of the header 420, respectively (S100), and the pipes 430 are headers. In the state inserted into the through hole 421 of 420, the header 420 and the pipe 430 are welded to form an integrated body (S200).

Here, the pipe 430 is formed in a variety of forms, such as a corrugated form or a screw-shaped groove is formed so as to facilitate a heat exchange on the outer periphery.

In addition, the header 420 is formed in the shape of a circular plate, the engaging groove 422 is formed in the circumferential direction of the header 420 on the outer circumference. In addition, the headers 420 may be formed on both sides of the pipe 430, or may be further installed one by one in the middle part when the length of the pipe 430 is long.

After the header 420 and the pipe 430 are integrally formed, the header 420 and the pipe 430 are integrally formed and inserted into the case 410, as shown in FIGS. 5 and 7. (S300) In this case, the case 410 is as shown in FIG. Is formed in a cylindrical shape, the inlet 412 and the outer periphery of the case 410 so that the exchange water transferred from the outside is introduced into the case 410 and after the heat exchange with the refrigerant transferred in the pipe 430, and discharged to the outside An outlet 413 is formed.

6 and 7, the case 410 to prevent the header 420 from moving in the longitudinal direction of the case 410 while the header 420 is provided inside the case 410. Fixed groove 411 is formed in the circumferential direction of the case 410 through a separate device on the outside of the), the fixing groove 411 is formed inside the case 410 so that the header 420 in place In this case, the fixing groove 411 is formed inside the case 410 and is formed at the position of the locking groove 422 of the header 420, so that the header 420 is inside the fixing groove 411. It will not be moved within the case 410.

Finally, as shown in FIGS. 6 and 7, after the header 420 is fixed through the fixing groove 411 of the case 410, both sides of the case 410 so that the refrigerant is concentrated in one place or diffused in multiple directions. The drawing device 414 is drawn by the drawing device (not shown), and thus the multi-tube heat exchanger 400 is integrally formed. (S500) At this time, both sides of the case 410 are formed by the drawing 414. 1 to 3, the outer periphery is formed in the shape of a curved funnel, the design can be changed in various embodiments, a hole through the end is formed is the refrigerant transferred to the pipe 430 is introduced / discharged.

Then, as shown in Figure 8 the end of the case 410, the drawing 414 is connected to the tube for transporting the refrigerant.

As shown in FIG. 8, the dual-stage refrigeration cycle heat pump system to which the multi-pipe heat exchanger 400 of the present invention is briefly described will include: a high temperature compressor 10 for compressing a refrigerant at a high temperature and a high pressure, and the steam of the high temperature compressor 10. When the refrigerant is transferred and the hot water at the set temperature is required at the place of use, a high temperature part heat exchanger 11 for exchanging heat with the supply water at the place of use for supplying a high temperature heat source, and a high temperature part for expanding the heat exchanged refrigerant through the high temperature part heat exchanger 11. A high temperature section cycle 100 including an expansion valve 12; Low temperature unit compressor 20 for compressing the refrigerant at a high temperature and high pressure, and the low temperature unit for expanding the heat exchanged refrigerant is transferred to the cascade heat exchanger 300 by the four-way valve 21 by the steam refrigerant of the low temperature unit compressor 20 A low temperature cycle (200) comprising an expansion valve (22) and an outdoor heat exchanger (23) for transferring the refrigerant expanded by the low temperature expansion valve (22) to exchange heat with external air; Connected between the high temperature part cycle 100 and the low temperature part cycle 200 to transfer the heat source of the low temperature part cycle 200 to the high temperature part cycle 100 or use the heat source of the low temperature part cycle 200 according to the set temperature of the destination. It consists of; cascade heat exchanger 300 to directly transfer to.

Here, the high temperature section multi-pipe heat exchanger 400 is further installed between the high temperature section heat exchanger 11 and the high temperature section expansion valve 12 to adjust the capacity and overheating of the refrigerant being transferred. The heat exchanger 400 is introduced into the inside of the high temperature part heat exchanger 11 through the connected bypass tube 14, and the heat exchanged steam refrigerant is transferred to the high temperature part compressor 10.

In addition, between the cascade heat exchanger 300 and the low temperature expansion valve 22, a low temperature multi-pipe heat exchanger 400 is further installed to adjust the capacity and overheat of the refrigerant to be transferred, the low temperature multi-pipe heat exchanger The refrigerant 400 is introduced into the refrigerant heat exchanged by the cascade heat exchanger 300 through the connected bypass pipe 25 to be transferred therein, and the heat exchanged steam refrigerant is transferred to the low temperature compressor 20. .

Meanwhile, the multi-tube heat exchanger is manufactured by the method of manufacturing the multi-tube heat exchanger described above, as shown in FIGS.

Here, the multi-tube heat exchanger is composed of a case 410, a header 420, and a pipe 430, the detailed description of each configuration is described above.

10 high temperature part compressor 11 high temperature part heat exchanger
12: high temperature expansion valve 14,25: bypass pipe
15,26: expansion valve 20: low temperature compressor
21: four-way valve 22: low temperature expansion valve
23: outdoor heat exchanger 30: high temperature inlet
31: high temperature part outlet 32: low temperature part inlet
33: Low temperature part outlet 34: Inlet for use
35 use place outlet 100 high temperature part cycle
200: low temperature part cycle 300: cascade heat exchanger
400: multi-tube heat exchanger 410: case
411: fixing groove 412: inlet
413 outlet 414 drawing
420: header 421: through hole
422: locking groove 430: pipe

Claims (4)

In the method of manufacturing a multi-pipe heat exchanger 400 applied to a binary refrigeration cycle heat pump system,
Inserting pipes 430 through which refrigerant is transferred into a plurality of through holes 421 formed at one end surface of the header 420, respectively (S100);
The pipe 430 is integrally welded in a state where the pipe 430 is inserted into the through hole 421 of the header 420 (S200);
A header 420 to which the pipe 430 is welded is inserted into the case 410 and provided (S300);
In the state in which the header 420 is provided therein, a fixing groove 411 is formed outside the case 410 through a device, and the fixing groove 411 is formed inside the case 410 to form a header 420. ) Is fixed in position (S400);
After the header 420 is fixed, both sides of the case 410 are drawn (414) to be integrally formed so that the refrigerant is concentrated in one place or spread in multiple directions (S500);
Method for producing a multi-pipe heat exchanger, characterized in that comprising a.
The method of claim 1,
In the step (S400) in which the fixing groove 411 is formed inside the case 410, the header 420 is fixed in place.
Hanging groove 422 is formed in the circumferential direction on the outer circumference of the header 420, and the fixing groove 411 is provided in the locking groove 422 portion is characterized in that the header 420 is fixed Method of manufacturing heat exchanger.
The method of claim 1,
On the outer periphery of the case 410, the inlet 412 and the outlet 413 are formed so that the exchange water is introduced into the case 410 and after the heat exchange with the refrigerant transferred in the pipe 430, the discharge water is discharged to the outside. Method of manufacturing a multi-tube heat exchanger.
The multi-tube heat exchanger using the manufacturing method of the multi-tube heat exchanger in any one of Claims 1-3.

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