CN103841791A - Heat transfer device and cabinet - Google Patents

Abstract

The invention discloses a heat exchange device and a cabinet, belonging to the field of heat exchangers. The heat exchange device includes: a first circulating air duct, a second circulating air duct, a first fan, a second fan and a heat exchange core; wherein, the first fan is arranged in the first circulating air duct; the second fan is arranged in the second Circulating air duct; the heat exchange core is composed of a plurality of flat tubes closely arranged and a plurality of fins arranged outside the flat tubes, wherein the two ends of each flat tube are air inlet and air outlet respectively, and the gap between the air inlet and the air outlet is The tube body is the first circulating heat exchange air channel; the fins are arranged on the flat tube at intervals, and the second circulating heat exchange air channel is between adjacent fins; the second circulating heat exchange air channel is connected with the first circulating air channel The heat exchange air passages cross each other; the first circulation heat exchange air passage of the heat exchange core communicates with the first circulation air passage, and the second circulation heat exchange air passage communicates with the second circulation air passage. It can achieve better heat dissipation and meet the cabinet heat dissipation requirements of communication equipment and IT equipment.

Description

Heat exchange device and cabinet

technical field

The invention relates to the field of heat exchangers, in particular to a heat exchange device and a cabinet for communication equipment, IT equipment and the like.

Background technique

With the continuous improvement of power consumption of communication equipment and IT equipment, more heat dissipation challenges are brought, and higher requirements are put forward for the heat exchangers used in them. At present, the common heat exchange units of heat exchangers are plate heat exchangers, the heat exchange surfaces of the internal and external circulation are the same size, and the whole machine is arranged. Its characteristics are: according to the flow direction of hot and cold air in the heat exchanger, it can be divided into several flow forms, such as forward flow (see figure 1), countercurrent flow (see figure 2) and cross flow (see figure 3), as shown in figure 1 , 2, and 3, wherein the solid line arrow is the outer circulation airflow, and the dotted line arrow is the inner circulation airflow. Among these flow forms, the heat transfer effect of the downstream flow is the worst, while the heat transfer effect of the counter flow is the best. Therefore, the application of countercurrent in engineering is also the most common. However, there are at least the following problems in the existing flat heat exchangers: the heat exchange surface is limited and cannot be further improved, although it can be improved on the heat exchange surface of the plate, such as adding bumps, increasing channels, etc. to increase the heat exchange surface area, but the increase in the heat exchange surface is limited, and the heat dissipation effect is not good due to the limited heat exchange surface. Another disadvantage is that the air duct for heat exchange is long, and the resistance along the way is large, which affects the air volume of the system and also adversely affects the heat exchange effect.

Contents of the invention

The embodiments of the present invention provide a heat exchange device and a cabinet, which can solve the problem that the heat exchange effect of the current heat exchanger cannot be further increased due to the limitation of the heat exchange area. It has the advantages of large heat exchange area and good heat dissipation effect.

The purpose of the present invention is achieved through the following technical solutions:

A heat exchange device, comprising: a first circulating air duct, a first fan, a second circulating air duct, a second fan and a heat exchange core; wherein, the first fan is arranged in the first circulating air duct; the The second fan is arranged in the second circulating air duct;

The heat exchange core is composed of a plurality of flat tubes arranged at intervals, a plurality of fins connected between the flat tubes and a plurality of fins arranged outside the flat tubes on both sides, wherein the two ends of each flat tube are respectively air inlets and the air outlet, the tube body between the air inlet and the air outlet is the first circulation heat exchange air channel; the fins are arranged at intervals, and the second circulation heat exchange air channel is between the adjacent fins; the second circulation heat exchange The hot air passage intersects with the first circulating heat exchange air passage;

The first circulating air channel of the heat exchange core communicates with the first circulating air channel, and the second circulating heat exchange channel communicates with the second circulating air channel.

A cabinet includes a cabinet body and a heat exchange device, the heat exchange device is arranged in the cabinet, and the heat exchange device adopts the heat exchange device provided by the embodiment of the present invention.

It can be seen from the technical solutions provided above that the heat exchange device provided by the embodiment of the present invention cooperates with the first circulating air duct with the first fan and the second circulating air duct with the second fan through the heat exchange core. , and since the heat exchange core is composed of a plurality of flat tubes and a plurality of fins arranged outside the flat tubes, the plurality of flat tubes and the plurality of fins form the first and second two different circulating heat exchange air channels, The heat exchange area of the heat exchange core is increased, so that the heat exchange device can dissipate heat better, and meet the heat dissipation requirements of communication equipment, IT equipment, and other cabinets. In addition, because the radiator has a simple structure and a manufacturing method, it also has the advantage of low cost.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative work.

Fig. 1 is the schematic diagram of the downstream heat exchange of the plate heat exchanger provided by the prior art;

Fig. 2 is the schematic diagram of the countercurrent heat exchange of the plate heat exchanger provided by the prior art;

Fig. 3 is the schematic diagram of the cross-flow heat exchange of the plate heat exchanger provided by the prior art;

FIG. 4 is a schematic diagram of a heat exchange device provided in Embodiment 1 of the present invention;

Fig. 5 is another schematic diagram of the heat exchange device provided by Embodiment 1 of the present invention;

FIG. 6 is a schematic diagram of a cabinet provided by Embodiment 2 of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Embodiment one

The embodiment of the present invention provides a heat exchange device, which can be used in the cabinets of communication equipment and IT equipment to dissipate heat from each equipment. As shown in Figures 4 and 5, the heat dissipation device includes: Fan 2, second circulating air duct 3, second fan 4 and heat exchange core 5;

Wherein, the first fan 2 is arranged in the first circulating air duct 1, and the first fan 2 can circulate the wind in the first circulating air duct 1; the second fan 4 is arranged in the second circulating air duct 3 , the second fan 4 can circulate the wind flow in the second circulating air duct 3;

The heat exchange core 5 is composed of a plurality of flat tubes 51 arranged at intervals, a plurality of fins 52 connected between the flat tubes 51 and a plurality of fins 52 arranged outside the flat tubes on both sides. It consists of a plurality of fins 52, wherein the two ends of each flat tube 51 are air inlet 511 and air outlet 512 respectively, and the tube body between the air inlet 511 and the air outlet 512 is a first circulating heat exchange air channel 513; each fin 52 The flat tubes 51 are arranged at intervals, and the second circulating heat exchange air duct 521 is formed between adjacent fins; the second circulating heat exchange air duct 521 intersects with the first circulating heat exchange air duct 513;

The first circulating heat exchange air channel 513 of the heat exchange core 5 communicates with the first circulating air channel 1 , and the second circulating heat exchange air channel 521 communicates with the second circulating air channel 3 . In this way, under the action of the first fan 2, the first circulating heat exchange air channel 513 of the heat exchange body formed by the plurality of flat tubes 51 of the heat exchange core 5 can form the first heat exchange cycle in the first circulating air channel 1. Under the action of the second fan 4 , the second circulation heat exchange air channel 521 of the heat exchange body formed by the plurality of fins 52 of the heat exchange core 5 forms a second heat exchange cycle in the second circulation air channel 3 . Since the heat exchange core 5 is composed of a plurality of flat tubes 51 closely arranged and a plurality of fins 52 arranged outside the flat tubes 51, the area of the heat exchange surface is effectively increased, so that the heat exchange device has better performance. heat radiation.

In practice, the first circulating air duct 1 of the heat exchange device can be used as the internal circulation of the cabinet, and the first circulating air duct 2 can be used as the outer circulation, or the first circulating air duct 1 can be used as the outer circulation of the cabinet, and the first circulating air duct 2 can be used as the outer circulation of the cabinet. Air duct 2 is used as internal circulation.

In the above heat exchange device, the length of the second circulating heat exchange air channel of the heat exchange core is shorter than the length of the first circulating heat exchange air channel. In this way, the path of the second circulating heat exchange air channel is short and the resistance is small, which will not affect the circulation of the air volume of the entire second circulating air channel, and will not affect the cooling effect due to insufficient air volume.

In the above heat exchange device, each fin of the heat exchange core is arranged on each flat tube perpendicular to the tube body of the flat tube.

In the above heat exchange device, the first circulating air duct and the second circulating air duct are not connected to each other, and the second circulating heat exchange air duct formed by the heat exchange core and the first circulating heat exchange air duct are perpendicular to each other and are not connected to each other; thus Both the first circulation heat exchange air passage and the second circulation heat exchange air passage can be used as internal circulation or external circulation without mutual influence.

In the above-mentioned heat exchange device, an enhanced heat exchange structure can be arranged on the inner wall of the flat tube of the heat exchange core and on the fins to further increase the heat exchange surface of the flat tube. The enhanced heat exchange structure can be: multi-fin structure, spiral structure, Any one or more of the bumps can also adopt other structures that can increase the heat dissipation area, and details will not be repeated here.

In the above heat exchange device, the heat exchange working medium in the first circulating air channel and the second circulating air channel is gas. In this way, air-to-air heat exchange can be realized in both the first circulating air duct and the second circulating air duct, without using other cooling fluids, and has the advantages of low cost and easy maintenance.

In the above-mentioned heat exchange device, a windshield outer cover 6 can be arranged outside the second fan 4, and the air outlet of the windshield outer cover 6 corresponds to the air inlet of the second circulating heat exchange air duct 521 of the heat exchange core 5, so that through the windshield outer cover 6 Cover the second fan 4, and guide the wind force of the second fan 4 to the second circulating heat exchange air duct 521, so that the space of the second circulating air duct 3 is not increased, and the structure is relatively simple and low The cost ensures the normal circulation operation of the wind force in the second circulating air duct 3 and will not affect the second circulating air duct 1 .

The above-mentioned heat exchange device is an air-to-air heat exchange, which can be divided into internal circulation (the first circulation air duct, the circulation heat dissipation channel formed by the multiple flat tubes of the heat exchange core and the first fan, that is, the circulation passage indicated by the arrow A in Figure 4 ) and the outer circulation (circulation cooling channel formed by the second circulation air channel, multiple fins of the heat exchange core and the second fan, that is, the circulation path indicated by arrow B in Figure 5). The internal circulation heat exchange surface is a plurality of flat tubes arranged in a row, and the air circulated in the internal circulation flows through the flat tubes to exchange heat with the heat exchange surfaces in the flat tubes and the tube wall of the flat tubes.

The heat exchange surface of the outer circulation heat exchange surface is a plurality of fins, and the plurality of fins are arranged together with the flat tube of the inner circulation, and the direction of the heat exchange surface can be perpendicular to the direction of the air duct of the inner circulation.

The working principle of internal and external circulation: the power of the internal circulation airflow is provided by the first fan, and the airflow provided by the first fan flows through the flat tube of the internal circulation and exchanges heat with the fins of the external circulation. The power of the outer circulation airflow is provided by the second fan. The airflow enters the air inlet of the outer circulation from the second fan, reaches the air duct of the outer circulation, enters the main heat exchange surface of the outer circulation from the air duct, and flows through the heat exchange fins to carry out Exchanging heat, it is discharged from the air outlet of the outer circulation.

On the flat tubes of the inner circulation and the fins of the outer circulation, further enhanced heat transfer structures can be set, such as dividing into multiple compartments, designing bumps, adding grooves, opening windows on the fins, and so on. Structures such as fins, bumps or grooves can also be added to the cavity of the outer circulation to enhance heat transfer.

The air volume of the air inlet of the outer circulation passes through the second fan, enters the cavity in the heat exchange core, reaches the fin area of the outer circulation, flows through the fin area for sufficient heat exchange, and is discharged from the air outlet.

The materials for making the flat tubes and fins of the heat exchange core can be metal, non-metal or alloy with good heat dissipation performance.

The above-mentioned materials used for making the first and second circulating air ducts can be metals, such as aluminum, copper, metal alloys, etc.; plastic materials can also be used.

In use, the plurality of flat tubes used for the heat exchange core of the inner circulation can also be used for the outer circulation, and the fins of the heat exchange core used for the outer circulation can also be used for the inner circulation. That is, the heat exchange structure of the heat exchange core used for internal and external circulation can be used interchangeably.

The heat dissipation device provided by the embodiment of the present invention can further improve the heat exchange capacity of the cabinet due to the large heat exchange surface of the heat exchange core, and meet the increasing heat dissipation demand of the product power consumption. The structure design is simple and the cost is low.

Embodiment two

The embodiment of the present invention also provides a cabinet, as shown in Figure 6, including a cabinet body 10 and a heat exchange device 20, the heat exchange device 20 is arranged in the cabinet body 10, and the heat exchange device 20 adopts the above embodiment A heat exchange device. The heat exchange device 20 can be arranged on the door or the side wall of the cabinet body 10. Specifically, the first circulating air channel and the second circulating air channel of the heat exchange device can be arranged on the two walls of the cabinet body 10 (such as the side wall or top wall), and the heat exchange core can be located at the intersection of the first circulating air duct and the second circulating air duct. Through the heat exchange device, the heat dissipation of the internal and external circulation of the cabinet can be realized.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technical field can easily conceive of changes or changes within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. A heat exchange device, characterized in that, comprising: The first circulating air duct, the first fan, the second circulating air duct, the second fan and the heat exchange core; wherein, The first fan is arranged in the first circulating air duct; the second fan is arranged in the second circulating air duct; The heat exchange core is composed of a plurality of flat tubes arranged at intervals, a plurality of fins connected between the flat tubes and a plurality of fins arranged outside the flat tubes on both sides, wherein the two ends of each flat tube are respectively air inlets and the air outlet, the tube body between the air inlet and the air outlet is the first circulation heat exchange air channel; the fins are arranged at intervals, and the second circulation heat exchange air channel is between the adjacent fins; the second circulation heat exchange The hot air passage intersects with the first circulating heat exchange air passage; The first circulating air channel of the heat exchange core communicates with the first circulating air channel, and the second circulating heat exchange channel communicates with the second circulating air channel. 2 . The device according to claim 1 , wherein the length of the second circulating heat exchange air channel of the heat exchange core is shorter than the length of the first circulating heat exchange air channel. 3 . 3. The device according to claim 1 or 2, wherein the fins of the heat exchange core are arranged on the flat tube perpendicular to the tube body of the flat tube. 4. The device according to claim 1 or 2, characterized in that, the second circulating heat exchange air channel and the first circulating heat exchange air channel of the heat exchange core perpendicularly intersect each other and do not communicate with each other. 5. The device according to claim 1 or 2, characterized in that the first circulating air duct and the second circulating air duct are not communicated with each other. 6. The device according to claim 1 or 2, characterized in that, the inner wall of the flat tube of the heat exchange core is provided with an enhanced heat exchange structure, and the enhanced heat exchange structure is: a multi-fin structure, a spiral structure, Any one or several of the bumps. 7. The device according to claim 1 or 2, characterized in that, the fins of the heat exchange core are provided with enhanced heat exchange structures, and the enhanced heat exchange structures are: multi-fin structure, spiral structure, convex any one or more of these points. 8. The device according to claim 1 or 2, characterized in that the heat-exchanging working medium in the first circulating air duct and the second circulating air duct is both gas. 9. The device according to claim 1 or 2, wherein the second fan is provided with a windshield cover, and the air outlet of the windshield cover corresponds to the second heat exchange cycle of the heat exchange core. The air inlet of the air duct. 10. A cabinet, comprising a cabinet body and a heat exchange device, the heat exchange device is arranged in the cabinet, characterized in that the heat exchange device adopts the heat exchange device described in any one of claims 1 to 9 .

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