Micro-channel heat exchanger of double-engine air conditioner

Abstract

The micro-channel heat exchanger of the double-engine air conditioner comprises two compressors and heat exchange assemblies connected with the two compressors respectively, the two heat exchange assemblies are arranged in the same box body, the heat exchange assemblies are oppositely arranged, and a gap is formed between the heat exchange assemblies. The heat exchange assembly comprises a first liquid pipe, a second liquid pipe and a plurality of communicating pipes, the two ends of each communicating pipe communicate with the first liquid pipe and the second liquid pipe, and a micropore structure is arranged in each communicating pipe and is of a long-strip flat structure; at least one of the communicating pipes is a condensation pipe and a superheating pipe, the condensation pipe is used for conveying a low-temperature liquid medium, and the superheating pipe is used for conveying a superheated vaporized medium. When the medium pressure in the channel is larger than the preset value, the flow speed of the medium is reduced through the micro-channel so as to reduce the medium pressure, and therefore the heat exchange performance and pressure drop of the micro-channel heat exchanger are both considered, and the overall operation performance and stability are improved.

Description

Technical Field

[0001] The utility model relates to the field of air conditioning, and in particular to a microchannel heat exchanger for a dual-engine air conditioner. Background Art

[0002] Traditional computer room air conditioners use aluminum fin copper tube heat exchangers. Due to the smaller design size, it is difficult to significantly improve the heat exchange performance compared to microchannel heat exchangers. At the same time, the old air conditioners use fin heat exchangers, which take up a large space and have low heat exchange efficiency in some places with more harsh environments, affecting the user experience. Utility Model Content

[0003] The main purpose of this utility model is to propose a microchannel heat exchanger for a dual-engine air conditioner, which aims to improve the existing copper tube heat exchanger structure. It adopts a microchannel heat exchanger and improves its overall structure to make its overall structure more compact, facilitate the installation layout of accessories, and achieve better heat dissipation effect.

[0004] To achieve the above objectives, the present invention proposes a microchannel heat exchanger for a dual-engine air conditioner, comprising two compressors and heat exchange components respectively connected to the two compressors, the two heat exchange components being arranged in the same box.

[0005] The heat exchange components are arranged relative to each other and have a spacing therebetween.

[0006] The heat exchange assembly includes a first liquid pipe, a second liquid pipe, and a plurality of connecting pipes whose ends are connected to the first liquid pipe and the second liquid pipe. A microporous structure is provided inside the connecting pipe, and the microporous structure is a long flat structure.

[0007] At least one of the connecting pipes is a condenser pipe and a superheater pipe. The condenser pipe is used to transport low-temperature liquid medium, and the superheater pipe is used to transport superheated vaporized medium.

[0008] In actual design, the multiple connecting pipes connecting the first liquid pipe and the second liquid pipe include condensing pipes for conveying low-temperature liquid medium and superheating pipes for conveying superheated vaporized medium according to the form of the medium flowing therethrough.

[0009] When the medium pressure in the channel is greater than a predetermined value, the medium flow rate is reduced to reduce the medium pressure, thereby enhancing the heat exchange effect, thereby taking into account the heat exchange performance and pressure drop of the microchannel heat exchanger and improving the overall operating performance and stability.

[0010] At the same heat exchange efficiency, the medium filling volume of the microchannel heat exchanger can be reduced by 30%. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0012] Figure 2 This is the distribution diagram of the two heat exchange components of the utility model in the box;

[0013] Figure 3 This is the front view of the heat exchange component;

[0014] Figure 4 It is a partial enlarged schematic diagram of the connecting pipe;

[0015] Figure 5 The following is a comparison table of finned heat sinks and microchannel heat sinks.

[0016] In the figure,

[0017] 1 is a heat exchange component, 11 is a first liquid pipe, 12 is a second liquid pipe,

[0018] 2 is a connecting pipe, 20 is a reduced diameter portion, 21 is a condensing pipe, 22 is a superheating pipe,

[0019] 31 is the copper pipe inlet, 32 is the copper pipe outlet,

[0020] 4 is the heat dissipation fin,

[0021] 5 is a mounting plate, 51 is a positioning wing, 52 is a positioning ear,

[0022] 6 is the avoidance zone. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0026] like Figures 1 to 5 As shown, a microchannel heat exchanger for a dual-engine air conditioner includes two compressors and heat exchange components 1 connected to the two compressors respectively. The two heat exchange components 1 are arranged in the same box.

[0027] The heat exchange components 1 are arranged relative to each other and have a distance therebetween.

[0028] The heat exchange assembly 1 includes a first liquid pipe 11, a second liquid pipe 12, and a plurality of connecting pipes 2 connected to the first liquid pipe 11 and the second liquid pipe 12 at both ends. A microporous structure is provided inside the connecting pipe 2, and the microporous structure is a long flat structure.

[0029] At least one of the connecting pipes 2 is a condenser pipe 21 and a superheater pipe 22 . The condenser pipe 21 is used to transport low-temperature liquid medium, and the superheater pipe 22 is used to transport superheated vaporized medium.

[0030] In actual design, the multiple connecting pipes 2 connecting the first liquid pipe 11 and the second liquid pipe 12 include condensing pipes 21 for conveying low-temperature liquid medium and superheating pipes 22 for conveying superheated vaporized medium according to the form of the medium flowing therethrough.

[0031] When the medium pressure in the channel is greater than a predetermined value, the medium flow rate is reduced to reduce the medium pressure, thereby enhancing the heat exchange effect, thereby taking into account the heat exchange performance and pressure drop of the microchannel heat exchanger and improving the overall operating performance and stability.

[0032] The copper pipe inlet and the copper pipe outlet are provided with plugs, and the plugs are used to inflate the heat exchanger, maintain pressure and prevent leakage.

[0033] At the same heat exchange efficiency, the medium filling volume of the microchannel heat exchanger can be reduced by 30%.

[0034] Specifically, the microporous structure area of ​​the condenser tube 21 is the same as that of the superheater tube 22. Of course, the microporous area of ​​the superheater tube 22 can also be larger than that of the condenser tube 21 to reduce the pressure caused by gas expansion. The use of a microchannel structure can effectively solve the problem of medium pressure and flow rate, thereby improving heat exchange efficiency.

[0035] In the embodiment of the present invention, the micropore area of ​​the superheater tube 22 is larger than the micropore area of ​​the condenser tube 21, thereby reducing the pressure caused by gas expansion.

[0036] Specifically, the flat surfaces of two adjacent connecting tubes 2 are provided with heat dissipation fins 4. Compared with heat pipes of the same area, the heat exchange efficiency is higher. It can be understood that within the same area, the heat exchange area of ​​the connecting tubes 2 with microporous structures improves the heat conversion efficiency by reducing the flow velocity and pressure.

[0037] In an embodiment of the present invention, a mounting plate 5 is welded to the wall surface of the two outermost connecting pipes 2 of the heat exchange component 1. The mounting plate 5 is provided with a bent positioning wing 51. The positioning wing 51 is provided with a positioning ear 52, thereby facilitating the installation of the heat exchange component 1 in the box.

[0038] Specifically, multiple condensing tubes 21 form a group, and multiple superheating tubes 22 form a group. The condensing tube 21 group and the superheating tube 22 group are respectively arranged on both sides of the heat exchange assembly 1, and an escape zone is provided between the condensing tube 21 group and the superheating tube 22 group (correspondingly, the wind resistance and noise are also reduced). This achieves the circulation flow of the exchanged medium. In one embodiment, a baffle is provided between the second liquid pipes 12. The second liquid pipes 12 are provided with a medium inlet and a medium outlet on both sides of the baffle. The medium outlet and the medium inlet are respectively connected to the two ends of the compressor.

[0039] The avoidance area can be installed with electric heating components (i.e. to prevent frost on the surface), so as to ensure the constant temperature and humidity of the computer room even during low-load dehumidification.

[0040] In the embodiment of the present invention, the mounting plate 5 is made of an aluminum plate and also serves as a heat dissipation structure, thereby achieving both heat exchange and mounting.

[0041] Specifically, the connecting pipe 2 is provided with a reduced diameter portion 20 at both ends, and the width of the reduced diameter portion 20 is smaller than the width of the main body of the connecting pipe 2. This facilitates the connection between the connecting pipe 2 and the first liquid pipe 11 and the second liquid pipe 12, and finally the circumferential welding is performed to seal.

[0042] In the embodiment of the present invention, the heat exchange assembly 1 is made of aluminum alloy. All-aluminum heat exchangers have cost advantages (low cost), are easy to recycle (profiles are easy to forge), and are lighter in weight.

[0043] Of course, in actual design, it can also be made of all copper according to needs, which will have a higher heat exchange efficiency. The above description is only a preferred embodiment of the utility model and does not limit the scope of the patent of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the scope of patent protection of the utility model.

Claims

1. A microchannel heat exchanger for a dual-engine air conditioner, characterized in that: The invention comprises two compressors and heat exchange components respectively connected to the two compressors, wherein the two heat exchange components are arranged in the same box. The heat exchange components are arranged relatively to each other and have a spacing therebetween. The heat exchange assembly comprises a first liquid pipe, a second liquid pipe and a plurality of connecting pipes whose two ends are connected to the first liquid pipe and the second liquid pipe, wherein a microporous structure is provided inside the connecting pipe, and the microporous structure is a long flat structure; At least one of the connecting pipes is a condenser pipe and a superheater pipe. The condenser pipe is used to transport low-temperature liquid medium, and the superheater pipe is used to transport superheated vaporized medium.

2. The microchannel heat exchanger of the dual-engine air conditioner according to claim 1, characterized in that: The microporous structure area of ​​the condenser tube is the same as the microporous structure area of ​​the superheater tube.

3. The microchannel heat exchanger of the dual-engine air conditioner according to claim 1, characterized in that: The micropore area of ​​the superheater tube is larger than the micropore area of ​​the condenser tube.

4. The microchannel heat exchanger of the dual-engine air conditioner according to claim 1, characterized in that: The flat surface parts of two adjacent connecting pipes are provided with heat dissipation fins.

5. The microchannel heat exchanger of the dual-engine air conditioner according to claim 1, characterized in that: The wall surfaces of the two outermost connecting pipes of the heat exchange component are welded with mounting plates, the mounting plates are provided with bent positioning wings, and the positioning wings are provided with positioning ears.

6. The microchannel heat exchanger of the dual-engine air conditioner according to claim 1, characterized in that: A plurality of condensing tubes form a group, and a plurality of superheating tubes form a group. The condensing tube group and the superheating tube group are respectively arranged on both sides of the heat exchange component, and an escape zone is arranged between the condensing tube group and the superheating tube group.

7. The microchannel heat exchanger of the dual-engine air conditioner according to claim 5, characterized in that: The mounting plate is made of an aluminum plate.

8. The microchannel heat exchanger of the dual-engine air conditioner according to claim 5, characterized in that: Both ends of the connecting pipe are respectively provided with a reduced diameter portion, and the width of the reduced diameter portion is smaller than the width of the connecting pipe body.

9. The microchannel heat exchanger of the dual-engine air conditioner according to claim 1, characterized in that: The heat exchange component is made of aluminum plate.

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