CN104807349A - Horizontal-flow type multi-medium heat exchanger - Google Patents

Abstract

The present invention relates to a flat-flow multi-media heat exchanger, the heat exchanger includes at least two flat tube groups, a first liquid collecting pipe and a second liquid collecting pipe; each of the flat tube groups includes from top to bottom The upper flat tube, the middle flat tube and the lower flat tube that are in contact in sequence, wherein the upper flat tube and the lower flat tube both flow the first medium, and the middle flat tube flows the second medium; between the two flat tube groups is a closed medium The flow channel is used to flow the third medium; the ends on the same side of each of the upper flat tubes and the lower flat tubes are in communication with a first liquid collecting pipe, and the ends on the same side of each of the middle flat tubes The ends are all in communication with a second liquid collection pipe, and the first liquid collection pipe and the second liquid collection pipe located on the same side are arranged front and back in the flow direction of the third medium. The invention realizes the simultaneous heat exchange of three media, and the structure of the heat exchanger is more compact and the heat exchange efficiency is higher due to the structure of the parallel circulation channel.

Description

A Straight Flow Multimedia Heat Exchanger

technical field

The invention relates to the technical field of heat exchanger manufacture, in particular to an advection multi-media heat exchanger.

Background technique

With the development of industrial technology, more and more occasions require multiple media to exchange heat at the same time, such as dual heat source heat pumps, natural cooling systems, etc. If only a general two-medium heat exchanger is used, a large space and initial investment are required. Fin-tube type three-medium compound heat exchanger (CN200710054879.8) proposes a fin-tube type three-medium heat exchanger, which can realize simultaneous heat exchange of three fluids. However, the heat exchange area per unit volume of this type of heat exchanger is small, so it is difficult to achieve compact structure and high heat exchange efficiency.

Contents of the invention

The technical problem to be solved by the invention is to realize the simultaneous heat exchange of the three media, and at the same time make the structure of the heat exchanger more compact and the heat exchange efficiency higher.

In order to solve the above technical problems, the present invention discloses a flat-flow multi-media heat exchanger, which includes at least two flat tube groups, a first liquid collecting pipe and a second liquid collecting pipe;

Each of the flat tube groups includes an upper flat tube, a middle flat tube and a lower flat tube which are sequentially contacted from top to bottom, wherein both the upper flat tube and the lower flat tube flow the first medium (the first medium flow channel), and the middle flat tube The tube flows the second medium (the second medium flow channel); between the two flat tube groups is a closed medium flow channel for flowing the third medium (the third medium flow channel); each of the upper flat tubes The ends on the same side as the lower flat tubes are in communication with a first liquid collecting pipe, and the ends on the same side of each of the middle flat pipes are in communication with a second liquid collecting pipe, located on the same side The first liquid collection pipe and the second liquid collection pipe are arranged in front and rear in the flow direction of the third medium.

Preferably, the lengths of the upper flat tube, the middle flat tube and the lower flat tube are equal.

Preferably, the upper flat tube, the middle flat tube and the lower flat tube are in parallel contact, and the first medium flow channel, the second medium flow channel and the third medium flow channel are arranged in parallel.

Preferably, a plurality of support columns are arranged between two adjacent flat tube groups for supporting the medium flow channel.

Preferably, the support column is a support warp.

Preferably, two adjacent support flaps form a triangle with the top surface or the ground of the medium flow channel.

Preferably, the first medium is a liquid or a gas-liquid two-phase medium; the second medium is a liquid or a gas-liquid two-phase medium; and the third medium is a gas or a mixed medium of gas and spray liquid.

Preferably, the heat exchanger further includes control valves, which are respectively arranged at the medium inlets of the upper flat tubes, middle flat tubes, lower flat tubes and medium flow passages, and are used to control the temperature of the medium for heat exchange. Perform heat transfer control.

The above technical solution of the present invention has the following advantages: the simultaneous heat exchange of the three media is realized, and the structure of the heat exchanger is more compact and the heat exchange efficiency is higher due to the structure of parallel flow channels.

Description of drawings

Fig. 1 is the structural representation of a kind of advection type multi-media heat exchanger of the present invention;

Fig. 2 is a top view of a flat-flow multi-media heat exchanger of the present invention.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Fig. 1 is a schematic structural view of a flat-flow multi-media heat exchanger of the present invention, and Fig. 2 is a top view of a flat-flow multi-media heat exchanger of the present invention; the heat exchanger includes at least two flat tube groups, The first liquid collection pipe 6 and the second liquid collection pipe 5; each of the flat tube groups includes an upper flat pipe 1, a middle flat pipe 2 and a lower flat pipe 3 that are in close contact with each other from top to bottom, wherein the upper flat pipe 1 and the lower flat tube 3 are the first medium flow channel, and the middle flat tube 2 is the second medium flow channel; the third medium flow channel (for a closed pipeline) is formed between the two flat tube groups; each of the The ends on the same side of the upper flat tube 1 and the lower flat tube 3 are in communication with a first liquid collector 6, and the ends on the same side of each of the middle flat tubes 2 are connected with a second collector. The liquid pipe 5 communicates. The first liquid collection pipe and the second liquid collection pipe at both ends of the flat tube group serve as the inlet and outlet of the medium respectively.

Further, the lengths of the upper flat tube 1 , the middle flat tube 2 and the lower flat tube 3 are equal. The first liquid collecting pipe 6 and the second liquid collecting pipe 5 located on the same side are arranged front and back in the flow direction of the third medium.

Further, a plurality of support columns are arranged between two adjacent flat tube groups to form the third medium flow channel.

Further, the support column is a support warp 4, and two adjacent support warps 4 form a triangle with the top surface or the ground of the third medium flow channel.

Further, the upper flat tube, the middle flat tube and the lower flat tube are in parallel contact, and the first medium flow channel, the second medium flow channel and the third medium flow channel are arranged in parallel.

Further, the medium of the first medium flow channel is liquid or gas-liquid two-phase medium; the medium of the first medium flow channel is liquid or gas-liquid two-phase medium; the medium of the third medium flow channel is gas Or the mixed medium of gas and spray liquid.

Further, the heat exchanger also includes control valves, which are respectively arranged at the medium inlets of the first medium flow channel, the second medium flow channel and the third medium flow channel, for exchanging heat medium for heat exchange control. The first medium in the first medium flow channel can choose to exchange heat with the other two media in the second medium flow channel and the third medium flow channel separately or simultaneously: with the second medium in the second medium flow channel alone When exchanging heat, stop the circulation of the third medium in the third medium flow channel (usually close the fan or the corresponding control valve); when exchanging heat with the third medium in the third medium flow channel alone, close the second medium Channels for the second medium within the flow channels; all flow channels are open for simultaneous heat exchange with both media.

The present invention can be used for simultaneous heat exchange between one hot fluid and two cold fluids (or one cold fluid and two hot fluids). Since the system has a parallel flow microchannel structure, the heat transfer coefficient is higher than that of ordinary heat exchangers. Bigger and more compact.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (8)

1. A flat-flow multi-media heat exchanger, characterized in that the heat exchanger comprises at least two flat tube groups, a first header and a second header; Each of the flat tube groups includes an upper flat tube, a middle flat tube and a lower flat tube that are sequentially contacted from top to bottom, wherein both the upper flat tube and the lower flat tube flow the first medium, and the middle flat tube flows the second medium; There is a closed medium flow channel between the two flat tube groups, which is used to flow the third medium; the ends on the same side of each of the upper flat tubes and the lower flat tubes are in communication with one of the first liquid collection pipes , the ends on the same side of each of the flat tubes communicate with a second liquid collection pipe, and the first liquid collection pipe and the second liquid collection pipe on the same side are in the middle of the third medium Arranged forward and backward in the direction of flow. 2 . The heat exchanger according to claim 1 , wherein the lengths of the upper flat tubes, the middle flat tubes and the lower flat tubes are equal. 3. The heat exchanger according to claim 2, wherein the upper flat tube, the middle flat tube and the lower flat tube are in parallel contact, and the first medium flow channel, the second medium flow channel and the third medium flow channel The media flow channels are arranged in parallel. 4. The heat exchanger according to claim 3, wherein a plurality of support columns are arranged between two adjacent flat tube groups for supporting the medium flow channel. 5. The heat exchanger according to claim 4, characterized in that, the support columns are support fins. 6. The heat exchanger according to claim 5, wherein two adjacent supporting fins form a triangle with the top surface or the ground of the medium flow channel. 7. The heat exchanger according to claim 6, wherein the first medium is a liquid or a gas-liquid two-phase medium; the second medium is a liquid or a gas-liquid two-phase medium; the third medium It is a mixed medium of gas or gas and spray liquid. 8. The heat exchanger according to any one of claims 1 to 7, characterized in that, the heat exchanger further comprises a control valve, and the control valves are respectively arranged on the upper flat tube, the middle flat tube, and the lower flat tube. The flat tube and the medium inlet of the medium flow channel are used to control the heat exchange of the medium for heat exchange.