KR200357333Y1 - Heat exchanger of cooler for central computer terminal - Google Patents

Abstract

The present invention relates to a heat exchanger of a control panel cooler using a porous tube panel that cools the inside of a control panel of an electric and electronic circuit, and includes a case having a size that can be installed inside the control panel, and an outside air inlet and an outside air formed at an upper portion of the case. An exhaust port, an internal air suction port and an internal air exhaust port formed in the lower part of the rear surface of the case, an external air fan installed inside the external air intake port to suck cool air outside the control panel, and a hot air inside the internal control panel installed inside the internal air control panel. A bettor fan that sucks air, a heat exchanger that is inclined between the outside fan and the bettor fan to cool the inside of the control panel, and is installed at the boundary between the evaporator and the condensation part of the heat exchanger and draws the inside of the case. Control panel cooling with middle bracket formed to separate into heat exchange chamber In the heat exchanger,

A header pipe having a coolant inlet formed at one side for vacuuming the inside and injecting a coolant therein; A plurality of perforated tube panels arranged at a predetermined interval on one side of the header pipe in a circumferential direction and formed with a plurality of refrigerant moving holes for inducing a function of evaporating and condensing the refrigerant stored in the header pipe; It is fixedly interposed between each of the porous tube panels, while allowing air to pass between each of the porous tube panels, while forming a plurality of zigzag shapes to hinder the flow of air and increase the contact area Aluminum louver pin; An end plate installed to seal an upper end of the refrigerant movement hole formed in each of the porous tube panels; The upper and lower fixing brackets are installed on the upper and lower sides of the middle bracket to cover the aluminum louver pins installed at both ends of the porous tube panels.

Description

Heat exchanger of cooler for central computer terminal

The present invention relates to a heat exchanger of a control panel cooler using a porous tube panel for cooling various electric and electronic control panels used in an industrial field, and more particularly, mounted in the control panel cooler to cool the air inside the control panel. A plurality of extruded tube panels extruded from aluminum are spaced apart at regular intervals, and a header pipe, which is a refrigerant storage tank, is installed at one end of each of the perforated tube panels. The heat exchanger is configured by interposing aluminum louver fins having heat dissipation windows between the porous tube panels by brazing welding, and the weight of the heat exchanger is reduced by using each of the above components formed of aluminum. To improve the heat exchange performance. , It is one to be manufactured at a low cost compared with conventional heat exchanger of the further groups.

In general, in a control panel composed of electric and electronic circuits, the internal temperature of the control panel becomes high due to the heat generated from the electric and electronic circuits. When the internal temperature of the control panel increases, troubles occur in the electric and electronic circuits, which often cause malfunctions. In addition, in severe cases, the electronic components installed inside the control panel are damaged or damaged by thermal runaway. To solve this problem, a cooler that effectively cools the internal temperature of the control panel is installed.

The control panel cooler used in the related art is a case 100 which forms a heat exchange chamber inside, as shown in FIGS. 10 to 12, and a heat exchanger installed at an inclination of about 7 to 10 degrees with respect to the vertical direction inside the case ( 200 and the heat exchanger 200 while dividing the heat exchange chamber inside the case 100 into an outdoor heat exchange chamber 110 for exchanging heat with air outside the control panel and an internal heat exchange chamber 120 for exchanging heat with the air inside the control panel. Middle bracket 300 for supporting the middle portion of the, and the bet fan 400 is installed in the bet heat exchange chamber 120 to suck the air inside the control panel to the bet heat exchange chamber 120 through the bet inlet port 130 and In addition, the outside air heat exchange chamber 110 is configured to include an outside air fan 500 that sucks air outside the control panel into the outside air heat exchange chamber 110 through the outside air inlet 150.

The heat generated inside the control panel is introduced into the bet heat exchange chamber 120 through the bet fan 400 by the bet fan 400, and then each heat pipe of the evaporator 210 formed at the lower end of the heat exchanger 200 ( While passing through the plurality of aluminum fins 202 arranged up and down in multiple stages while supporting the heat pipes and between each of the heat pipes 201), the air is discharged into the control panel through the bet outlet 14. When the temperature of the evaporator 210 which absorbs heat from the hot air rises, the refrigerant in the enclosed space inside each heat pipe 201 obtains energy and evaporates from the liquid state to the gaseous state. When the evaporator 210, which is the lower end of the heat pipe 201, is rapidly cooled, eventually, the hot air inside the control panel is introduced into the bet heat exchange chamber 120 by the suction action of the bet fan 400, and then the evaporator ( 210 Overload will be cooled in the process, so the cooled cooling air will be able to stand for cooling, because the control panel inside through the bet outlet 140, exhaust supplied to the control board.

In addition, the refrigerant evaporated inside the lower end of each heat pipe 201 is moved to the upper end by the heat exchange action with the hot air in the evaporator 210 at the lower end of the heat exchanger 200, in which the upper end of each heat pipe 201. The refrigerant in the gas state moved to the side is condensed by heat exchange with cold air outside the control panel which is sucked into the outside heat exchange chamber 110 by the outside fan 500 and passes through the condensation unit 220. The refrigerant is maintained in the liquid state by the surface tension in the upper end of the heat pipe 201, that is, the condensation unit 220, the heat pipe 201 is a general copper pipe material as shown in Figure 17 (A) to smooth If formed, when the refrigerant condensed in the condenser 220 increases in gravity than the surface tension, the refrigerant flows to the lower end of the heat pipe 201 and returns to the evaporator 210. The liquid refrigerant returned to the evaporator is again Since the evaporation is repeated by the heat exchange action of cooling the hot air introduced into the bet heat exchange chamber 120 by the fan 400, the heat exchanger 200 cools the air heated by the heat generated inside the control panel. This completes the heat exchange cycle.

In general, the heat exchanger 200 rapidly evaporates 210 without staying in the condensation unit 220 when the gaseous refrigerant evaporated in the evaporation unit 210 is condensed in the condensation unit 220 and becomes a liquid state. Flowing down to) increases the efficiency of the heat exchange cycle. Therefore, in the prior art, as a structure that helps the refrigerant condensed in the liquid phase in the condensation unit 220 to be quickly returned to the evaporation unit 210, a heat pipe made of copper pipe as shown in (B) of FIG. 17. (201) A method of forming a sawtooth groove (e) on the inner circumferential surface, a method of installing a separate mesh net (f) on the inner circumferential surface of the heat pipe 201, as shown in (C), (D) to serve as a wick. As a porous structure capable of forming a wok (g) made of a material different from ordinary wall materials, the capillary action is actively performed on the inner circumferential surface of the heat pipe 201 so that the refrigerant condensed in the condenser 220 is evaporated. (210) to return quickly.

However, the prior art as described above has the following problems.

First, when the heat exchanger 200 is composed of a plurality of heat pipes 201 made of copper pipes, the refrigerant is individually injected through the injection holes 201-1 formed at the top of each of the heat pipes 201. If the work is complicated and difficult, and if the refrigerant is not injected in the same amount in each heat pipe 201, it is difficult to expect a uniform heat exchange performance,

Second, in the aluminum fin 202 installed in the multi-phase heat exchanger 200, an insertion hole 202-1 should be formed as shown in FIG. 18 so that a plurality of heat pipes 201 can be inserted therein. It is very difficult and difficult to join each heat pipe inserted into each insertion hole by welding method, and the welded parts increase the thermal resistance, which hinders the conduction of electricity and reduces heat exchange performance. There is a limit to increasing the number of suitable aluminum fins,

Third, it is expensive to form grooves (e) in each heat pipe 201 made of copper pipes or to insert structures such as separate mesh nets (f) and wok (g). Will be raised.

Therefore, it has been pointed out that it is difficult to lighten the heat exchanger of the control panel cooler which is essentially used in the industrial field, it is difficult to expect the improvement of the heat exchange performance, and the production cost is high.

The present invention has been proposed in view of the above-mentioned problems in the related art. The purpose of the present invention is to achieve a light weight of the heat exchanger of the control panel cooler, to improve heat exchange performance to the maximum, and to reduce the production cost. It is designed for.

As a means of the present invention for this purpose,

A case having a size that can be installed inside the control panel, an outside air inlet and an outside air outlet formed in an upper portion of the front of the case, an inside air inlet and an outside air outlet formed in the bottom of the case, and an inside of the outside air inlet. An outside fan for sucking cold air outside the control panel, an inside fan installed inside the inside of the inside of the intake suction port, and a heat exchanger installed to be inclined between the outside fan and the inside fan to cool the inside of the control panel. In the control panel cooler having a middle bracket installed at the boundary between the evaporation unit and the condensation unit of the heat exchanger and separating the inside of the case into an internal heat exchange chamber and an external air heat exchange chamber,

The heat exchanger,

A header pipe having a coolant inlet formed at one side for vacuuming the inside and injecting a coolant therein;

A plurality of perforated tube panels arranged at a predetermined interval on one side of the header pipe in a circumferential direction and formed with a plurality of refrigerant moving holes for inducing a function of evaporating and condensing the refrigerant stored in the header pipe;

It is fixedly interposed between each of the porous tube panels, while allowing air to pass between each of the porous tube panels, while forming a plurality of zigzag shapes to hinder the flow of air and increase the contact area Aluminum louver pin;

An end plate installed to seal an upper end of the refrigerant movement hole formed in each of the porous tube panels;

Upper and lower fixing brackets installed on upper and lower sides of a middle bracket to cover aluminum louver pins installed at both ends of the porous tube panels;

It is characterized by consisting of.

And, the refrigerant movement hole formed in each of the porous tube panel is characterized in that consisting of a square,

In addition, the aluminum looper pins interposed between the porous tube panels are characterized in that they are fixedly bonded to the side of the porous tube panel by brazing welding.

1 and 2 are a front view and a rear view of a control panel cooler for explaining the present invention.

Figure 3 is a side configuration diagram showing each component installation state of the control panel cooler for explaining the present invention.

4 is a front structural diagram of a heat exchanger of a control panel cooler of the present invention.

5 is a perspective view of the porous tube panel of the heat exchanger of the present invention.

6 is a perspective view of an aluminum louver plate of the heat exchanger of the present invention.

7 is an enlarged sectional view taken along the line A-A of FIG.

8 is a cross-sectional view taken along the line B-B in FIG.

9 is an operating state of the heat exchanger of the present invention.

10 to 12 are front, rear and side views of a control panel cooler of the prior art.

13 to 18 are heat exchanger assembly and part construction diagram of a control panel cooler of the prior art.

※ Explanation of code for main part of drawing

1: case 1a: bet heat exchanger chamber

1b: outside air heat exchange chamber 11: outside air inlet

12: outdoor air outlet 13: air outlet

14: bet suction port 2: outside fan

3: bet fan 4: heat exchanger

4a: evaporator 4b: condenser

41: refrigerant moving hole 42: porous tube panel

43: louver 44: aluminum louver pin

46: header pipe 47: injection hole

48: end plates 49a, 49b: upper and lower fixing brackets

5: Middle Bracket

Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are a front view and a rear view of a control panel cooler for explaining the present invention, Figure 3 is a side configuration diagram showing each component installation state of the control panel cooler for explaining the present invention, Figure 4 Heat exchanger front structure diagram of a control panel cooler of the invention, Figure 5 is a perspective view of the porous tube panel of the heat exchanger of the present invention, Figure 6 is a perspective view of an aluminum louver plate of the heat exchanger of the present invention, Figure 7 is an enlarged AA line of Figure 3 8 is a cross-sectional view taken along line BB of FIG. 7, and FIG. 9 is a diagram illustrating an operating state of the heat exchanger of the present invention.

The present invention is a case (1) having a standard that can be installed inside the control panel as in the prior art, and the outside air inlet (11) and the outside air outlet (12) is formed in the upper and lower front, upper and lower, The bet discharge port 13 and the bet suction port 14 is formed up and down.

Inside the case 1, an outside air fan 2 is installed inside the outside air inlet 11 so as to induce cold air from the outside of the control panel, and is installed inside the inside of the control panel. It is equipped with a bet fan (3) for inducing hot air suction.

A heat exchanger (4) is provided between the outside fan (2) and the inside fan (3) to have an inclination angle of 7 to 10 degrees with respect to the vertical direction as the inside of the case (1). Middle to support the heat exchanger (4) while partitioning the inside of the case (1) and the outside heat exchange chamber (1b) at the boundary between the evaporator (4a) and the condensation (4b) The bracket 5 is provided.

A feature of the present invention is that the heat exchanger (4) is formed by a plurality of porous tubes formed at a predetermined interval by a plurality of refrigerant movement holes (41) which are extruded from aluminum and formed in a rectangular shape without forming a heat pipe of a copper pipe as in the prior art. In order to allow the panel 42, the aluminum louver pin 44 formed with the louver 43 to interrupt the flow of air while breaking the boundary layer of the air flow, and each porous tube panel 42 to perform a heat exchange operation. It consists of the header pipe 46 which stores a refrigerant | coolant.

Referring to the assembling state of each of the above components, first, the header pipe 46 has an inlet 47 for vacuuming the inside and injecting a coolant, and on the opposite side of the inlet, a plurality of pores in the circumferential direction Tube panels 42 are spaced apart at regular intervals, each of the refrigerant movement holes 41 formed in each of the porous tube panel 42 is stacked in communication with the inside of the header pipe 46 to the header pipe The refrigerant stored in the 46 functions to evaporate and condense only through the refrigerant movement holes 41 formed in each of the porous tube panels 42, and is connected to prevent leakage from the outside.

In addition, between the porous tube panel 42 arranged in the header pipe 46, aluminum louver pin 44 is interposed fixedly by a brazing low-temperature welding method in the state of being interposed, this brazed aluminum louver The pin 44 is bent in a zigzag shape and a plurality of louvers 43 are formed in succession to increase the coefficient of friction while breaking the boundary layer of air flow in each of the bent portions. Likewise, it is formed in a state of opening toward the outside with respect to the intermediate portion.

In addition, an end plate 48 is installed at an upper end of the plurality of porous tube panels 42 arranged at predetermined intervals in the header pipe 46, and each of the porous tube panels 42 has an end plate 48. While covering the upper end of the integrally to seal the upper end of the refrigerant movement holes 41 formed in each of the porous tube panel 42, and the aluminum louver pin 44 is installed at both ends of the left and right of the porous tube panel The upper and lower fixing brackets 49a and 49b are fixed to the upper and lower sides of the middle bracket 5, respectively, and the heat exchanger 4 is provided in each of the upper and lower fixing brackets. The fixing hole for fixing to this is formed.

The operation of the heat exchanger 4 of the present invention configured as described above will be described.

The inside of the heat exchanger (4) is vacuumed through the inlet (47) of the header pipe (46), and then the injection of the coolant can be completed by injecting an appropriate amount of refrigerant once through the inlet (47). As a result, the operation of injecting the refrigerant into the heat exchanger 4 is much easier than injecting the refrigerant into a plurality of heat pipes separately as in the prior art, and also has a plurality of refrigerants stored in one header pipe 46. Since the porous tube panels 42 perform heat exchange, each porous tube panel can expect uniform heat exchange performance.

And the operation of the heat exchanger 4 is the hot air sucked into the bet heat exchange chamber (1a) by the operation of the bet fan (3) does not move to the outside air heat exchange chamber (1b) by the middle bracket (5) It passes through the evaporation portion (4a) of (4), in which the contact with the aluminum louver pin 44 installed in a zigzag shape in the process of passing between the porous tube panel 42, as well as the By louvers 43 formed in each of the bent portions, the air flows into the upper side of each bent portion, moves downward, and then flows upward again (interrupting the boundary layer of the air flow) to hinder the air flow, thereby causing hot air. The friction coefficient with the aluminum louver fin 44 is increased to increase the heat exchange action, when the hot air is deprived of heat in the process of passing through the evaporator (4a) to obtain the heat energy As the degree rises, the refrigerant evaporates from the liquid state to the gaseous state and moves toward the condensation part 4b along the refrigerant moving hole 41 formed in each of the porous tube panels 42, so that the evaporator 4a is rapidly cooled. As the hot air is cooled coolly, the hot air sucked into the bet heat exchange chamber 1a by the bet fan 3 is cooled by heat exchange in the course of passing through the evaporator 4a, and is then controlled by the bet outlet 13. Since the inside of the control panel is supplied to the inside, it is possible to maintain the low temperature state set by the cooling air discharged to the bet outlet 13.

The refrigerant evaporated from the evaporator 4a is moved to the condenser 4b, and cool air is external to the control panel by operating the external fan 2 of the external heat exchange chamber 1b in which the condenser 4b is located. After entering the outside heat exchange chamber (1b) and passes between each of the porous tube panel 42 of the condensation unit (4b), also in this case aluminum louver fin 44 installed between each of the porous tube panel 42 Cool air is hindered by the flow of air, and the boundary layer of the air flow is broken, the friction coefficient is increased, so that the heat exchange action of the aluminum louver fin 44 is actively performed, the cold air heats in the condensation unit (4b) When the condensation unit 4b, which is deprived of heat and taken out of the cold air, is cooled, the vaporized refrigerant is condensed in a liquid state on the inner circumferential surface of the refrigerant movement hole 41. Square The corner portion of the refrigerant movement hole 41 has a capillary action, and thus the condensed liquid refrigerant is condensed at four corners more than the slope of the refrigerant movement hole 41, and the liquid-vapor interface is formed at each corner portion. As it increases, the radius of curvature of the miniscus (men surface formed by the capillary phenomenon) increases, and accordingly, the liquid refrigerant condensed at each corner of the refrigerant movement hole 41 is subject to gravity and capillary phenomenon. It will be moved down quickly by the evaporator (7).

On the other hand, the heat exchanger (4) the brazing welding portion for joining the porous tube panel 42 and the aluminum louver fin 44 can be reduced to a negligible thermal resistance, so the porous tube panel 42 in the aluminum louver fin 44 When energy is transferred to), the loss of energy can be minimized.

Therefore, the heat exchanger 4 of the present invention can transfer energy exchanged from the aluminum louver fin 44 to the porous tube panel 42 without loss, and the refrigerant stored in the header pipe 46 is transferred from the evaporator 4a. Evaporation by the heat exchange action of the heat exchanger and condensation by the heat exchange action in the condensation unit 4b to quickly flow down to each corner of the refrigerant movement hole 41. The heat exchange cycle can be done.

According to the present invention as described above, a plurality of porous tube panels extruded from aluminum for heat exchangers of the control panel cooler at regular intervals in the header pipe made of aluminum. The evaporation and condensation of the refrigerant evenly in the air makes the multiple tube panels heat exchange evenly, and the aluminum louver plate is joined by brazing welding between the porous tube panels without loss of energy transfer. In the porous tube panel, a rectangular refrigerant movement hole is formed, and each corner portion of the refrigerant movement hole concentrates the refrigerant condensed in the condensation unit by capillary action, so that the liquid refrigerant condensed in the condensation unit is quickly formed. The heat exchange cycle is smooth And is effective to ensure that it made possible to improve the heat exchange efficiency, it is also intended that the present design can be light-weight of the heat exchanger, it is possible to reduce the production cost, can provide a heat exchanger with improved heat exchange efficiency.

Claims (3)

A case having a size that can be installed inside the control panel, an outside air inlet and an outside air outlet formed in an upper portion of the front of the case, an inside air inlet and an outside air outlet formed in the bottom of the case, and an inside of the outside air inlet. An outside fan for sucking cold air outside the control panel, an inside fan installed inside the inside of the inside of the intake suction port, and a heat exchanger installed to be inclined between the outside fan and the inside fan to cool the inside of the control panel. In the control panel cooler having a middle bracket installed at the boundary between the evaporation unit and the condensation unit of the heat exchanger and separating the inside of the case into an internal heat exchange chamber and an external air heat exchange chamber, The heat exchanger, A header pipe having a coolant inlet formed at one side for vacuuming the inside and injecting a coolant therein; A plurality of perforated tube panels arranged at a predetermined interval on one side of the header pipe in a circumferential direction and formed with a plurality of refrigerant moving holes for inducing a function of evaporating and condensing the refrigerant stored in the header pipe; It is fixedly interposed between each of the porous tube panels, while allowing air to pass between each of the porous tube panels, while forming a plurality of zigzag shapes to hinder the flow of air and increase the contact area Aluminum louver pin; An end plate installed to seal an upper end of the refrigerant movement hole formed in each of the porous tube panels; Upper and lower fixing brackets installed on upper and lower sides of a middle bracket to cover aluminum louver pins installed at both ends of the porous tube panels; Heat exchanger of the control panel cooler using a porous tube panel, characterized in that consisting of. The method of claim 1, The heat exchanger of the control panel cooler using the porous tube panel, characterized in that the refrigerant movement hole formed in each of the porous tube panel is formed in a square. The method of claim 1, The aluminum looper fins interposed between the porous tube panels are fixed to the side of the porous tube panel by brazing welding, and the heat exchanger of the control panel cooler using the porous tube plate.