CN216523274U

CN216523274U - Full-aluminum microchannel shell-and-tube heat exchanger

Info

Publication number: CN216523274U
Application number: CN202123043462.6U
Authority: CN
Inventors: 张爱华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-05-13
Anticipated expiration: 2031-12-06

Abstract

The utility model discloses an all-aluminum microchannel shell-and-tube heat exchanger, which relates to the technical field of air-conditioning refrigeration or heating, and comprises: the side wall of the water chamber shell is provided with two connecting pipe mounting holes; the water chamber comprises a water chamber shell, a plurality of baffle plates and inner end plates, wherein the inner part of the water chamber shell is provided with the plurality of baffle plates and the inner end plates; the water chamber shell comprises an outer end enclosure, wherein two ends of the water chamber shell are respectively provided with the outer end enclosure, and a first space is formed between the outer end enclosure and an inner end plate; the aluminum alloy micro-channel flat tubes are arranged in the water chamber shell, the aluminum alloy micro-channel flat tubes penetrate through the two inner end plates and the plurality of baffle plates, a plurality of water flow through holes are further formed in the baffle plates, and the water flow through holes in the two adjacent baffle plates are arranged in a staggered mode. The heat exchanger is simple in structure, convenient to manufacture, maintain and repair, short in heat exchange flow of the refrigerant in the aluminum alloy micro-channel flat tube, good in heat exchange effect, greatly reduced in volume and weight and low in cost compared with a traditional tube-shell heat exchanger.

Description

Full-aluminum microchannel shell-and-tube heat exchanger

Technical Field

The utility model relates to the technical field of air-conditioning refrigeration or heating, in particular to an all-aluminum micro-channel shell-and-tube heat exchanger.

Background

The traditional large central air conditioner generally adopts a mode of combining a shell-and-tube heat exchanger and an outdoor cooling tower for heat exchange. The refrigerant in the shell-and-tube heat exchanger exchanges heat with water, the water is changed into cold water or hot water, outdoor circulating water is sent into an outdoor cooling tower to be heated or cooled to the atmospheric environment temperature, and indoor circulating water is sent into the room to exchange heat with air in the room. The shell-and-tube heat exchanger adopts a steel shell, an internal heat exchange tube is an external thread copper tube, and the copper tube and an inner end plate in the shell are connected and sealed in a tube expansion mode. Such shell-and-tube heat exchangers have high heat exchange efficiency, but are large in size and weight, and currently use more refrigerants of the formula R22 or R134 a. If R410a refrigerant is used, the wall thickness of the steel shell and the copper tube are doubled; if carbon dioxide is used as the refrigerant, the wall thickness of the steel shell and the copper tube is increased by more than five times, which makes the manufacture difficult.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the all-aluminum microchannel shell-and-tube heat exchanger provided by the utility model has the advantages that the structure is simple, the manufacture and the maintenance are convenient, compared with the traditional shell-and-tube heat exchanger, the all-aluminum microchannel shell-and-tube heat exchanger is manufactured by adopting single aluminum alloy, the heat exchange flow of a refrigerant in an aluminum alloy microchannel flat tube is short, the heat exchange effect is higher, the volume and the weight of the heat exchanger are greatly reduced, and the cost is very low; by using carbon dioxide as the refrigerant, the ultra-high pressure resistant heat exchanger and the connecting pipe system can be compact and miniaturized, the manufacture is easy, and the risk of ultra-high pressure leakage is reduced to the minimum space.

The technical scheme adopted by the utility model is as follows:

an all aluminum microchannel shell and tube heat exchanger comprising:

the side wall of the water chamber shell is provided with two connecting pipe mounting holes;

the water chamber shell is internally provided with a plurality of baffle plates, the baffle plates are arranged between the two connecting pipe mounting holes in parallel at intervals, and the outer peripheral wall of each baffle plate is connected with the inner peripheral wall of the water chamber shell;

the inner end plate is arranged at each of two ends of the water chamber shell;

the outer end enclosures are respectively arranged at two ends of the water chamber shell and are positioned at the outer side of the inner end plate, and a first space is formed between each outer end enclosure and the corresponding inner end plate;

the aluminum alloy micro-channel flat tubes are arranged in the water chamber shell, each aluminum alloy micro-channel flat tube penetrates through the two inner end plates and the plurality of baffle plates, two ends of each aluminum alloy micro-channel flat tube are respectively located in the two first spaces, each baffle plate is further provided with a plurality of water flow through holes, and the water flow through holes in the two adjacent baffle plates are arranged in a staggered mode.

Preferably, each aluminum alloy micro-channel flat tube is provided with a plurality of micro-through holes, each micro-through hole is formed from one end surface of the aluminum alloy micro-channel flat tube to the other end surface of the aluminum alloy micro-channel flat tube, and each micro-through hole is a round hole or a square hole.

Preferably, a second space is formed between each inner end plate and the adjacent baffle plate, a third space is formed between every two adjacent baffle plates, and each connecting pipe mounting hole is respectively communicated with one second space.

Preferably, each inner end plate and each baffle plate are respectively provided with a plurality of flat holes, and the aluminum alloy micro-channel flat tubes penetrate through the flat holes.

Preferably, the water circulation device further comprises two circulating water connecting pipes, and each circulating water connecting pipe is respectively communicated with one connecting pipe mounting hole.

Preferably, the refrigerator further comprises refrigerant connecting pipes, each outer sealing head is provided with a first port, each first port is communicated with one first space, and each refrigerant connecting pipe is connected with one first port.

Preferably, the water chamber shell further comprises heat insulation materials, and the heat insulation materials are wrapped on the outer surface of each outer end enclosure and the outer peripheral wall of the water chamber shell.

Preferably, a welding groove is formed at the joint of the outer end enclosure and the inner end plate.

Preferably, each of the baffle plates and the flat hole on each of the inner end plates are formed by laser cutting or water jet cutting.

Preferably, the water chamber shell is an aluminum alloy tube or a round tube formed by rolling an aluminum alloy plate and welding by laser welding or argon arc welding.

The technical scheme has the following advantages or beneficial effects:

the all-aluminum microchannel shell-and-tube heat exchanger has the advantages of simple structure, convenience in manufacturing and maintenance, short heat exchange flow of the refrigerant in the aluminum alloy microchannel flat tube, good heat exchange effect, greatly reduced volume and weight of the shell-and-tube heat exchanger and low cost compared with the traditional shell-and-tube heat exchanger.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an all-aluminum microchannel shell-and-tube heat exchanger used as a condenser in the present invention;

FIG. 2 is a schematic diagram of the overall structure of an all-aluminum microchannel shell-and-tube heat exchanger used as an evaporator in the utility model;

FIG. 3 is a schematic structural view of the outer head of the present invention;

FIG. 4 is a schematic structural view of an inner end plate in the present invention;

FIG. 5 is a schematic view of the baffle of the present invention;

FIG. 6 is a schematic first cross-sectional view of an aluminum alloy microchannel flat tube of the present invention;

FIG. 7 is a second schematic cross-sectional view of an aluminum alloy microchannel flat tube of the present invention;

fig. 8 is a schematic structural view of a water chamber housing in the present invention;

FIG. 9 is a schematic diagram of an all aluminum microchannel shell and tube heat exchanger as an evaporator in accordance with the present invention.

In the figure: 1. a water chamber shell; 2. a pipe connecting mounting hole; 3. a baffle plate; 4. an inner end plate; 5. an outer end enclosure; 6. a first space; 7. aluminum alloy microchannel flat tubes; 8. a water flow through hole; 9. a micro-via; 10. a second space; 11. flat holes; 12. a circulating water connecting pipe; 13. a refrigerant connection pipe; 14. a first port; 15. a thermal insulation material; 16. mounting holes; 17. a third space; 18. and (5) processing holes.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of an all-aluminum microchannel shell-and-tube heat exchanger used as a condenser in the present invention; FIG. 2 is a schematic diagram of the overall structure of an all-aluminum microchannel shell-and-tube heat exchanger used as an evaporator in the utility model; FIG. 3 is a schematic structural view of the outer head of the present invention; FIG. 4 is a schematic structural view of an inner end plate in the present invention; FIG. 5 is a schematic view of the baffle of the present invention; FIG. 6 is a schematic first cross-sectional view of an aluminum alloy microchannel flat tube of the present invention; FIG. 7 is a second schematic cross-sectional view of an aluminum alloy microchannel flat tube of the present invention; fig. 8 is a schematic structural view of a water chamber housing in the present invention; fig. 9 is a schematic structural view of an all-aluminum microchannel shell-and-tube heat exchanger as an evaporator in the present invention, and referring to fig. 1 to 9, a preferred embodiment is shown, which illustrates an all-aluminum microchannel shell-and-tube heat exchanger, comprising:

the water chamber shell 1 is provided with two connecting pipe mounting holes 2 on the side wall of the water chamber shell 1. The water chamber shell 1 is made of an aluminum alloy material, the water chamber shell 1 can be horizontally arranged or vertically arranged, as shown in fig. 1, in the embodiment, the water chamber shell 1 is vertically arranged.

Baffling board 3, the inside of hydroecium shell 1 is equipped with a plurality of baffling boards 3, and parallel and interval between a plurality of baffling boards 3 locate between two takeover mounting holes 2, the periphery wall of each baffling board 3 respectively with hydroecium shell 1 internal perisporium connection. As shown in fig. 1, in the present embodiment, three baffles 3 are provided, and the three baffles 3 are arranged at equal intervals. One of them takes over mounting hole 2 and is located the baffling board 3 upside of the most superior side, and another takes over mounting hole 2 and is located the downside of the baffling board 3 of the downside, and the periphery wall of baffling board 3 and the interior perisporium clearance fit of hydroecium shell 1.

The inner end plate 4 and the two ends of the water chamber shell 1 are respectively provided with an inner end plate 4. As shown in fig. 1, two inner end plates 4 are provided, the upper end and the lower end of the water chamber housing 1 are provided with openings, and at least part of the inner end plate 4 extends into the water chamber housing 1 and is welded with the water chamber housing 1 by laser welding, argon arc welding or cold welding. Wherein, the middle part of the inner end plate 4 is provided with a fabrication hole 18, which is convenient for turning the outer circle, welding groove and outer circle step after the inner end plate 4 is fixed, and the fabrication hole 18 is filled by argon arc welding or cold welding after the turning is finished.

The outer end enclosure 5 is provided with an outer end enclosure 5 at each of two ends of the water chamber shell 1, the outer end enclosure 5 is positioned at the outer side of the inner end plate 4, and a first space 6 is formed between the outer end enclosure 5 and the inner end plate 4. As shown in fig. 3, a mounting hole 16 is provided at an opening of the outer head 5 for mounting the inner end plate 4, the mounting hole 16 is communicated with an inner cavity of the outer head 5, a first space 6 is provided between the inner end plate 4 and the inner cavity of the outer head 5, the outer head 5 is disposed at an end of the water chamber housing 1, and is fixed by laser welding, argon arc welding or cold welding, preferably argon arc welding.

Aluminum alloy micro-channel flat tubes 7 are arranged in the water chamber shell 1, a plurality of aluminum alloy micro-channel flat tubes 7 are arranged in the water chamber shell 1, each aluminum alloy micro-channel flat tube 7 penetrates through two inner end plates 4 and a plurality of baffle plates 3, two ends of each aluminum alloy micro-channel flat tube 7 are respectively located in two first spaces 6, a plurality of water flow through holes 8 are further formed in each baffle plate 3, and the water flow through holes 8 in the two adjacent baffle plates 3 are arranged in a staggered mode. The aluminum alloy micro-channel flat tube 7 is flat, and the aluminum alloy micro-channel flat tube 7 is parallel to the axial direction of the connecting tube mounting hole 2, so that impact of water flow on the aluminum alloy micro-channel flat tube 7 is avoided. The aluminum alloy microchannel flat tubes 7 in the embodiment are used for channels for circulation of condensing agents, the heat exchange requirement from one air conditioner to three air conditioning systems can be met by increasing or decreasing the number of the aluminum alloy microchannel flat tubes 7, and a plurality of all-aluminum microchannel shell-and-tube heat exchangers are adopted when the number of the aluminum alloy microchannel flat tubes 7 is larger than that of the three air conditioning systems; the aluminum alloy micro-channel flat tube 7 is an extruded aluminum alloy section tube with high heat conductivity coefficient; the length of the aluminum alloy micro-channel flat tube 7 is verified by theoretical calculation and experiments; when soft water is used outside the aluminum alloy microchannel flat tube 7, the air conditioning system is suitable for the southern region of China with the lowest air temperature of 5 ℃; when the aluminum alloy micro-channel flat tube 7 is externally used with glycol solution, the air conditioning system is suitable for the extremely cold region in China with the lowest temperature of minus 48 ℃ by using the high-concentration glycol solution. In this embodiment, as shown in fig. 1, the water flow holes 8 on the upper baffle plate 3 are located on the left side of the aluminum alloy micro-channel flat tube 7, the water flow holes 8 on the middle baffle plate 3 are located on the right side of the aluminum alloy micro-channel flat tube 7, the water flow holes 8 on the lower baffle plate 3 are located on the left side of the aluminum alloy micro-channel flat tube 7, and the water flow holes 8 on the three baffle plates 3 are staggered. After the aluminum alloy microchannel flat tube 7 penetrates through the inner end plate 4 and the baffle plate 3, determining the distance between the end part of the aluminum alloy microchannel flat tube 7 and the baffle plate 3 and the distance between the baffle plate 3 and the baffle plate 3, and then performing spot welding on the joint of the aluminum alloy microchannel flat tube 7 and the baffle plate 3 in a cold welding mode. And then determining the distance between the inner end plate 4 and the end part of the aluminum alloy microchannel flat tube 7, welding by adopting a laser welding mode or a cold welding mode, welding all combination gaps of the aluminum alloy microchannel flat tube 7 and the inner end plate 4, preferably adopting the laser welding mode, or welding by adopting the cold welding mode, and welding all combination gaps of the water chamber shell 1 and the inner end plate 4.

Further, as a preferred embodiment, each aluminum alloy microchannel flat tube 7 is provided with a plurality of micro through holes 9, each micro through hole 9 is formed from one end surface of the aluminum alloy microchannel flat tube 7 to the other end surface of the aluminum alloy microchannel flat tube 7, and each micro through hole 9 is a round hole or a square hole. In this embodiment, when refrigerants such as R22, R134a, R410a, and R32 are used, the micro through hole 9 is a square hole, and the length and the height of the cross-sectional dimension of the square hole are not greater than 3mm and not greater than 2mm, respectively. When carbon dioxide is used as a refrigerant, the micro-through holes 9 are round holes, and the inner diameters of the round holes are not more than 1 mm. The refrigerant in this embodiment flows in the micro-through holes 9 in a foam flow form, the flow in the copper pipe with the diameter larger than 3mm is in a turbulent flow form, the foam flow heat exchange effect is much larger than the turbulent flow heat exchange effect, the flow of the foam flow is shorter, the problems of miniaturization and high heat exchange efficiency of the heat exchanger are solved, and the energy efficiency ratio of the system is greatly improved.

Further, as a preferred embodiment, a second space 10 is formed between each inner end plate 4 and its adjacent baffle plate 3, and a third space 17 is formed between each two adjacent baffle plates 3, wherein each nozzle mounting hole 2 is respectively communicated with a second space 10. As shown in fig. 1, there are two second spaces 10 and two third spaces 17, and the inner walls of the second spaces 10 and the third spaces 17 are coated with electroless nickel plating or paint to form a rust-proof and scale-proof coating.

Further, as a preferred embodiment, each inner end plate 4 and each baffle plate 3 are respectively provided with a plurality of flat holes 11, and the aluminum alloy microchannel flat tubes 7 pass through the flat holes 11. In this example. The flat hole 11 on the inner end plate 4 is opposite to the flat hole 11 on the baffle plate 3, the flat hole 11 on the baffle plate 3 is opposite to the flat hole 11 on the baffle plate 3, wherein the aperture size of the flat hole 11 is larger than the external dimension of the aluminum alloy micro-channel flat tube 7, so that the aluminum alloy micro-channel flat tube 7 can conveniently pass through. The distribution mode of the plurality of flat holes 11 is shown in fig. 4 and 5, and the plurality of flat holes 11 are distributed like a ring and arranged along the circumferential direction of the inner end plate 4 or the baffle plate 3.

Further, as a preferred embodiment, the device further comprises two circulating water connecting pipes 12, and each circulating water connecting pipe 12 is respectively communicated with one connecting pipe mounting hole 2. The circulating water connecting pipe 12 is welded and fixed with the connecting pipe mounting hole 2 in a laser welding mode, a cold welding mode or an argon arc welding mode, and the laser welding fixing mode is preferably selected. After the welding is completed, the leakage of the water chamber shell 1 can be checked through the circulating water connecting pipe 12.

Further, as a preferred embodiment, the refrigerant connection pipe 13 is further included, each outer sealing head 5 is respectively provided with a first through hole 14, each first through hole 14 is respectively communicated with a first space 6, and each refrigerant connection pipe 13 is respectively connected with a first through hole 14. The refrigerant connection pipe 13 in this embodiment communicates with the first space 6 through the first through port 14 for inflow or outflow of the refrigerant. For example, the refrigerant enters the first space 6 from the refrigerant connection pipe 13 at the upper end, then passes through the micro-through hole 9 into the first space 6 at the lower end, and flows out with the refrigerant connection pipe 13 at the lower end, or the refrigerant enters from the lower end and flows out from the upper end.

Further, as a preferred embodiment, the water chamber shell further comprises a heat insulation material 15, and the outer surface of each outer seal head 5 and the outer peripheral wall of the water chamber shell 1 are wrapped with the heat insulation material 15 (heat insulation layer). Wherein, the heat insulation material 15 is polystyrene or polyurethane heat insulation material.

Further, as a preferred embodiment, a welding groove is formed at the joint of the outer end enclosure 5 and the inner end plate 4. In this embodiment, welding is performed at the welding groove, so that the outer end enclosure 5 and the inner end plate 4 are connected and fixed.

Further, as a preferred embodiment, each baffle plate 3 and the flat hole 11 of each inner end plate 4 are formed by laser cutting or water jet cutting.

Further, as a preferred embodiment, the water chamber housing 1 is an aluminum alloy tube or a circular tube formed by rolling an aluminum alloy plate and performing laser welding or argon arc welding.

The utility model has simple structure and convenient manufacture, maintenance and repair, compared with the traditional air-conditioning system heat exchanger, the heat exchange flow of the refrigerant in the aluminum alloy microchannel flat tube 7 is short, the heat exchange effect is good, the volume of the all-aluminum microchannel shell-and-tube heat exchanger is very small, and the cost is very low.

In this embodiment, when the refrigerant connection pipe 13 at the upper end is filled with the gaseous refrigerant, the refrigerant connection pipe 13 at the lower end is filled with the liquid refrigerant, the circulating water connection pipe 12 at the upper end is filled with hot water or glycol solution, and the circulating water connection pipe 12 at the lower end is filled with cold water or glycol solution, as shown in fig. 1, in a heat exchange manner between the refrigerant used as a condenser and water or glycol solution in a refrigeration mode, the refrigerant connection pipe 13 at the upper end is filled with the gaseous refrigerant, the refrigerant connection pipe 13 at the lower end discharges the liquid refrigerant, the circulating water connection pipe 12 at the lower end is filled with cold water or glycol solution, and the circulating water connection pipe 12 at the upper end discharges hot water or glycol solution.

In this embodiment, as shown in fig. 2, in the heating mode, as a method of exchanging heat between the refrigerant used in the evaporator and water or glycol solution, the refrigerant connection pipe 13 at the end is fed with liquid refrigerant, the refrigerant connection pipe 13 at the upper end discharges gaseous refrigerant, the circulating water connection pipe 12 at the lower end is fed with cold water or glycol solution, and the circulating water connection pipe 12 at the upper end discharges hot water or glycol solution.

In this embodiment, in fig. 1 and 2, when the air temperature is higher than 5 ℃, soft water may be used, and when the air temperature is lower than 5 ℃, a glycol solution is used, and according to the lowest temperature condition of the use environment of the air conditioning system, a glycol solution with a solvent of 0-66% is used, and the freezing point of the glycol solution is required to be lower than 20 ℃ at the refrigerant evaporation temperature.

When the air conditioning system runs in a refrigeration mode in the embodiment, a gaseous refrigerant enters the aluminum alloy microchannel flat tube 7, because the inner diameter of the micro through hole 9 in the aluminum alloy microchannel flat tube is small, the refrigerant can only flow in a foam flow mode, the heat of the refrigerant is transferred to the outer wall of the aluminum alloy microchannel flat tube 7, the heat is exchanged with flowing water outside the aluminum alloy microchannel flat tube 7 through the outer wall of the aluminum alloy microchannel flat tube 7, the heat is taken out of the all-aluminum microchannel shell-and-tube heat exchanger through water or glycol solution, and the gaseous refrigerant in the aluminum alloy microchannel flat tube 7 is liquefied and condensed; when the air conditioning system operates in a heating mode, a liquid refrigerant enters the aluminum alloy micro-channel flat tube 7, because the inner diameter of the micro-through hole 9 in the aluminum alloy micro-channel flat tube is small, the refrigerant can only flow in a foam flow mode, the refrigerant absorbs heat required by vaporization and evaporation from the outer wall of the aluminum alloy micro-channel flat tube 7, and flowing water sources continuously provide heat for the outer wall of the aluminum alloy micro-channel flat tube 7, so that the refrigerant is ensured to be completely vaporized; the utility model can be used as a condenser for heat exchange and can also be used as an evaporator for heat exchange.

The utility model can be used as a heat exchanger, can be applied to household air conditioners, central air conditioners and automobile air conditioners, in particular to new energy automobile air conditioners and air conditioning systems using carbon dioxide as a refrigerant, and enables the heat exchangers of the air conditioners to be miniaturized and compacted.

The utility model does not need lubricating oil in the processing process of the heat exchanger part, does not need cleaning after the manufacturing, and has environment-friendly manufacturing process.

While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.

Claims

1. An all-aluminum microchannel shell and tube heat exchanger, comprising:

the inner end plate is arranged at each of two ends of the water chamber shell;

2. The all-aluminum microchannel shell-and-tube heat exchanger of claim 1, wherein each of the aluminum alloy microchannel flat tubes is provided with a plurality of micro through holes, each of the micro through holes is respectively formed from one end surface of the aluminum alloy microchannel flat tube to the other end surface of the aluminum alloy microchannel flat tube, and each of the micro through holes is a round hole or a square hole.

3. The all-aluminum microchannel shell-and-tube heat exchanger of claim 1, wherein a second space is formed between each inner end plate and the adjacent baffle plate, a third space is formed between each adjacent two baffle plates, and wherein each connecting tube mounting hole is respectively communicated with one second space.

4. The all-aluminum microchannel shell-and-tube heat exchanger of claim 1, wherein each of the inner end plates and each of the baffle plates are respectively provided with a plurality of flat holes, and the aluminum alloy microchannel flat tubes pass through the flat holes.

5. The all-aluminum microchannel shell-and-tube heat exchanger of claim 3, further comprising two circulating water connecting pipes, each of the circulating water connecting pipes being respectively communicated with one of the connecting pipe mounting holes.

6. The all-aluminum microchannel shell-and-tube heat exchanger of claim 1, further comprising refrigerant connecting tubes, each of the outer headers having a first port formed therein, each of the first ports being in communication with one of the first spaces, and each of the refrigerant connecting tubes being in communication with one of the first ports.

7. The all-aluminum microchannel shell-and-tube heat exchanger of claim 1, further comprising a thermal insulation material, wherein the thermal insulation material is wrapped on the outer surface of each outer head and the outer circumferential wall of the water chamber shell.

8. The all-aluminum microchannel shell-and-tube heat exchanger of claim 1, wherein a welding groove is formed at a joint of the outer end socket and the inner end plate.

9. The all-aluminum microchannel shell and tube heat exchanger of claim 4 wherein each of the baffles and the flat holes in each of the inner end plates are formed by laser cutting or water jet cutting.

10. The all-aluminum microchannel shell-and-tube heat exchanger of claim 1, wherein the water chamber shell is an aluminum alloy tube or a round tube formed by rolling an aluminum alloy plate and performing laser welding or argon arc welding.