Protective corrosion-resistant micro-channel heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a protective corrosion-resistant micro-channel heat exchanger which comprises a base pipe, a plurality of micro-channel pipes are installed in the middle of the base pipe, fins are arranged among the micro-channel pipes, a water inlet end is arranged at the top of the base pipe, and a water outlet end is arranged at the bottom of the base pipe. The top of the upper water collecting pipe is connected to the water inlet end, and the bottom of the lower water collecting pipe is connected to the water outlet end. According to the protective corrosion-resistant micro-channel heat exchanger, the micro-channel pipes are installed in the middle of the base pipe, and the fins are arranged between the micro-channel pipes, so that the overall structural strength of the heat exchanger is improved, and the corrosion resistance of the heat exchanger is improved. Due to the design, the heat exchanger can keep stable performance in a severe working environment. The outer sides of the fins are higher than the outer surfaces of the micro-channel pipes, particularly 10 mm higher than the outer surfaces of the micro-channel pipes, so that an effective physical barrier is provided for the micro-channel pipes.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field, concretely relates to a protective corrosion -resisting microchannel heat exchanger. BACKGROUND

[0002] In the heat exchanger technical field, microchannel heat exchanger because of its efficient, compact structural characteristics, in industrial refrigeration, waste heat utilization, automobile air conditioner, household air conditioner, heat pump water heater and multiple fields such as have been widely applied. However, traditional microchannel heat exchanger has some inherent defects in design, and these defects limit its further application and development.

[0003] Traditional microchannel heat exchanger usually adopts the simple structure of flat tube + fin + header. This structure although meets the demand of heat exchange to some extent, but there are the following significant problems:

[0004] The flat tube wall is thin, easy to break:

[0005] The flat tube wall thickness in traditional microchannel heat exchanger is often thin, and some are even less than 0.8mm. This thin-walled flat tube is extremely easy to be broken by collision with foreign matters in the installation and use process, leading to medium leakage, affecting the performance and service life of the heat exchanger.

[0006] The fin and flat tube are easy to be deformed by collision:

[0007] The fin and flat tube, as the core components of the heat exchanger, its structural integrity and stability are crucial to the heat exchange efficiency. However, in traditional microchannel heat exchanger, the fin and flat tube are often directly exposed to the outside, lack effective protection. In the installation and use process, they are easy to be deformed or broken by external collision, and then affect the overall performance of the heat exchanger.

[0008] Many installation precautions, time-consuming and laborious:

[0009] Due to the structural characteristics of traditional microchannel heat exchanger, its installation process needs to be particularly careful to avoid collision and damage. This not only increases the difficulty and complexity of installation, but also prolongs the installation time, reduces the work efficiency. UTILITY MODEL CONTENTS

[0010] The utility model aims at providing a protective corrosion -resisting microchannel heat exchanger to solve the problems of thin flat tube wall, easy to break, fin and flat tube easy to be deformed by collision, many installation precautions, time-consuming and laborious in traditional microchannel heat exchanger in the above background art.

[0011] In order to achieve the above object, the utility model provides a kind of protective corrosion -resistant microchannel heat exchanger, including base pipe, the middle part of the base pipe is equipped with several microchannel pipes, fin is provided between the microchannel pipe, the top of the base pipe is provided with water inlet end, the bottom of the base pipe is provided with water outlet end, the upper and lower ends of the microchannel pipe are respectively equipped with upper header pipe and lower header pipe, the top of the upper header pipe is connected with water inlet end, the bottom of the lower header pipe is connected with water outlet end.

[0012] As preferred, the outer side of the fin is higher than the outer surface of the microchannel pipe.

[0013] As preferred, the fin includes a corrugated protective plate, a positioning frame is sleeved on the outer side of the protective plate, the protective plate and the positioning frame are in sliding fit, the positioning frame is fixed on the side wall of the base pipe, and the protective plate is locked and fixed by lock bolts on the upper and lower sides of the positioning frame.

[0014] As preferred, one side of the upper header pipe is connected to each microchannel pipe by several water distribution connectors, and one side of the lower header pipe is connected to each microchannel pipe by several water collection connectors.

[0015] As preferred, the microchannel pipes are arranged at equal intervals.

[0016] As preferred, an upper screen is installed on the inner wall of the upper header pipe near the water distribution connector, and a lower screen is installed on the inner wall of the lower header pipe near the water collection connector.

[0017] As preferred, the top of the upper header pipe is connected to the water inlet end by a water inlet connector, and the top of the lower header pipe is connected to the water outlet end by a water outlet connector.

[0018] As preferred, the height of the fin above the outer surface of the microchannel pipe is 10mm.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] In the protective corrosion -resistant microchannel heat exchanger, several microchannel pipes are installed in the middle part of the base pipe, and fins are arranged between the microchannel pipes, which not only increases the overall structural strength of the heat exchanger, but also improves its corrosion resistance. This design enables the heat exchanger to maintain stable performance in harsh working environment.

[0021] The outer side of the fin is higher than the outer surface of the microchannel pipe, especially higher than 10mm, which provides an effective physical barrier for the microchannel pipe. During installation and use, even if the fin is hit by foreign matter, the fin can first withstand the impact, thereby protecting the microchannel pipe from damage.

[0022] The fins are in sliding fit with the positioning frame through the corrugated protective plates, and are locked and fixed through locking bolts, so that the installation and dismounting of the fins are simple and fast. Meanwhile, the upper and lower water collecting pipes are connected with each micro-channel pipe through the water distributing pipes and the water collecting pipes, and the water inlet joint and the water outlet joint are arranged, which greatly simplifies the installation process of the heat exchanger and improves the working efficiency.

[0023] The design of the equidistant arrangement of the micro-channel pipes and the arrangement of the blocking nets in the upper and lower water collecting pipes help to optimize the distribution of water flow in the heat exchanger, ensure that each micro-channel pipe can be fully flushed by water flow, and improve the heat exchange efficiency.

[0024] Through the above structural improvement, the micro-channel heat exchanger of the utility model not only maintains high efficient heat exchange, but also significantly improves the structural strength and stability, reduces the damage risk in the installation and use process. This not only improves the overall performance of the heat exchanger, but also prolongs the service life. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the internal structure of the side of the utility model;

[0027] Figure 3 It is a schematic diagram of the structure of the fin in the utility model;

[0028] Figure 4 It is a schematic diagram of the upper and lower ends of the micro-channel pipe in the utility model;

[0029] The meanings of the various reference numbers in the drawing are as follows:

[0030] 1, base pipe; 11, micro-channel pipe; 12, water inlet end; 13, water outlet end; 14, upper water collecting pipe; 141, upper blocking net; 142, water inlet joint; 143, water distributing pipe; 15, lower water collecting pipe; 151, lower blocking net; 152, water outlet joint; 153, water collecting pipe; 2, fin; 21, protective plate; 22, positioning frame; 23, locking bolt. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0032] The utility model provides a kind of protective corrosion-resistant microchannel heat exchanger, as shown in Figures 1-4 Including base pipe 1, the middle part of base pipe 1 is equipped with several microchannel pipes 11, fin 2 is arranged between microchannel pipe 11, the top of base pipe 1 is provided with water inlet end 12, the bottom of base pipe 1 is provided with water outlet end 13, the upper and lower ends of microchannel pipe 11 are respectively equipped with upper water collecting pipe 14 and lower water collecting pipe 15, the top of upper water collecting pipe 14 is connected with water inlet end 12, the bottom of lower water collecting pipe 15 is connected with water outlet end 13. The arrangement design of microchannel pipe 11 makes that heat exchanger can make full use of its surface area to carry out heat exchange, improves heat exchange efficiency. Meanwhile, the setting of fin 2 not only strengthens the structural strength of heat exchanger, but also effectively protects microchannel pipe 11 from external collision and corrosion, to prolong the service life of heat exchanger.

[0033] Through the design of upper water collecting pipe 14 and lower water collecting pipe 15 and their connection mode with microchannel pipe 11, the utility model realizes the uniform distribution and collection of water flow. This design ensures that water flow can pass through each microchannel pipe 11 smoothly, avoids the problem of water flow dead angle and excessive resistance, and further improves heat exchange efficiency.

[0034] The microchannel heat exchanger of the utility model adopts modular design, and the connection between parts is simple and convenient to disassemble. Especially the connection mode of upper water collecting pipe 14 and lower water collecting pipe 15 with water inlet end 12 and water outlet end 13 makes the heat exchanger more convenient to install and maintain, reduces installation cost and maintenance difficulty.

[0035] The material selection of fin 2 and microchannel pipe 11 and their connection mode all consider the requirement of corrosion resistance. This design makes the heat exchanger can maintain stable performance in harsh working environment, reduces the failure and damage caused by corrosion.

[0036] In the embodiment, the outside of fin 2 is higher than the outer surface of microchannel pipe 11. This design enhances the physical protection ability of heat exchanger. Fin 2 as external barrier can effectively block the direct collision of external foreign matters to microchannel pipe 11, reduces the risk of breakage caused by collision, to improve the durability and reliability of heat exchanger.

[0037] Specifically, the fin 2 includes a corrugated protective plate 21, the outer side of the protective plate 21 is sleeved with a positioning frame 22, the protective plate 21 and the positioning frame 22 are in sliding fit, the positioning frame 22 is fixed on the side wall of the base pipe 1, and the upper and lower sides of the positioning frame 22 lock and fix the protective plate 21 through lock bolts 23. The corrugated protective plate 21 not only increases the rigidity of the fin, but also improves the heat exchange efficiency, because the corrugated structure can increase the contact area of air or fluid with the fin. At the same time, the sliding fit design of the protective plate 21 and the positioning frame 22 facilitates installation and disassembly, and the lock bolts 23 ensure the stability of the protective plate 21 and prevent it from loosening or falling off during work.

[0038] Further, one side of the upper water collecting pipe 14 is connected to each micro-channel pipe 11 through a plurality of water distribution connecting pipes 143, and one side of the lower water collecting pipe 15 is connected to each micro-channel pipe 11 through a plurality of water collecting connecting pipes 153. This connection mode ensures that the water flow can be evenly distributed to each micro-channel pipe 11, improving the heat exchange efficiency. At the same time, it also facilitates cleaning and maintenance of the heat exchanger, because each micro-channel pipe 11 can be individually disassembled and cleaned without affecting the operation of the entire system.

[0039] Further, the micro-channel pipes 11 are arranged at equal intervals. The equal-interval arrangement of the micro-channel pipes 11 makes the flow of water and air or fluid in the heat exchanger more uniform, avoiding local overheating or overcooling, thereby improving the heat exchange efficiency and overall performance of the heat exchanger.

[0040] Further, an upper baffle net 141 is installed on the inner wall of the upper water collecting pipe 14 near the water distribution connecting pipe 143, and a lower baffle net 151 is installed on the inner wall of the lower water collecting pipe 15 near the water collecting connecting pipe. The design of the baffle net can block impurities and particulate matter in the water flow, preventing them from entering the micro-channel pipes 11 and causing blockage or wear. At the same time, the baffle net can also guide the water flow, ensuring that the water flow can smoothly enter and leave the micro-channel pipes 11 through the water distribution connecting pipe 143 and the water collecting connecting pipe 153.

[0041] Further, the top of the upper water collecting pipe 14 is connected with the water inlet end 12 through a water inlet joint 142, and the top of the lower water collecting pipe 15 is connected with the water outlet end 13 through a water outlet joint 152. This connection mode simplifies the installation process of the heat exchanger, making it convenient to connect the water inlet end 12 and the water outlet end 13 with external pipelines or systems. At the same time, it also facilitates the overhaul and replacement of the heat exchanger, because the water inlet joint 142 and the water outlet joint 152 can be individually disassembled and replaced without affecting the structure of the entire heat exchanger.

[0042] Further, the fin 2 is 10 mm higher than the outer surface of the micro-channel tube 11. This specific height design ensures that the fin 2 can provide sufficient physical protection, and also avoids the increase of wind resistance and the decrease of heat exchange efficiency caused by the too high fin 2. The height of 10 mm is an optimized balance value, which ensures the performance of the heat exchanger and improves the durability and reliability of the heat exchanger.

[0043] In use, the protective corrosion-resistant micro-channel heat exchanger first exchanges heat through heat transfer between the fluid in the micro-channel tube 11 and the fin 2 and the external environment. When the fluid (such as water, refrigerant or other heat exchange medium) enters the upper collecting pipe 14 from the water inlet end 12, it is evenly distributed to each micro-channel tube 11 through the water distribution connector 143. In the micro-channel tube 11, the fluid exchanges heat with the fin 2, and transfers heat to the fin 2 or absorbs heat from the fin 2. Then, the fluid is collected in the lower collecting pipe 15 and discharged from the water outlet end 13 through the water collecting connector 153 and the water outlet connector 152.

[0044] The outer side of the fin 2 is higher than the outer surface of the micro-channel tube 11, and the protective plate 21 with corrugated structure effectively blocks the direct collision of foreign matters on the micro-channel tube 11, reducing the risk of damage. At the same time, the material selection of the fin 2 and the micro-channel tube 11 and the connection mode between them take into account the corrosion resistance requirement, ensuring the stability and durability of the heat exchanger in harsh working environment.

[0045] After the fluid enters the upper collecting pipe 14 from the water inlet end 12, the upper blocking net 141 is installed on the inner wall of the upper collecting pipe 14 near the water distribution connector 143, which can block impurities and particulate matters in the fluid and prevent them from entering the micro-channel tube 11 to cause blockage or wear. Then, the fluid is evenly distributed to each micro-channel tube 11 through the water distribution connector 143. In the micro-channel tube 11, the fluid exchanges heat with the fin 2. The corrugated protective plate 21 increases the contact area of air or fluid with the fin, improving the heat exchange efficiency. At the same time, the equidistantly arranged micro-channel tubes 11 ensure that the water flow and air or fluid flow more uniformly in the heat exchanger, avoiding the phenomenon of local overheating or overcooling.

[0046] After heat exchange, the fluid is collected in the lower collecting pipe 15 and discharged from the water outlet end 13 through the water collecting connector 153 and the water outlet connector 152. The lower blocking net 151 is installed on the inner wall of the lower collecting pipe 15 near the water collecting connector, which can also block impurities and particulate matters in the fluid, ensuring the cleanliness and smoothness of the inside of the heat exchanger.

[0047] Since the utility model adopts modularization design, the connection between each component is simple and convenient to disassemble. When cleaning, maintaining or replacing components are needed, each micro-channel pipe 11 or related components can be individually disassembled and cleaned without affecting the operation of the whole system. Meanwhile, the design of water inlet joint 142 and water outlet joint 152 is also convenient for overhauling and replacing the heat exchanger.

[0048] The basic principle, main features and advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the utility model and are not intended to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A protective, corrosion-resistant microchannel heat exchanger comprising a base tube (1), characterized in that: A plurality of microchannel tubes (11) are installed in the middle of the base tube (1), fins (2) are provided between the microchannel tubes (11), a water inlet (12) is provided at the top of the base tube (1), a water outlet (13) is provided at the bottom of the base tube (1), an upper water collecting pipe (14) and a lower water collecting pipe (15) are installed at the upper and lower ends of the microchannel tube (11), respectively, the top of the upper water collecting pipe (14) is connected to the water inlet (12), and the bottom of the lower water collecting pipe (15) is connected to the water outlet (13).

2. The protective, corrosion-resistant microchannel heat exchanger according to claim 1, characterized in that: The outer side of the fin (2) is higher than the outer surface of the microchannel tube (11).

3. The protective, corrosion-resistant microchannel heat exchanger according to claim 1, characterized in that: The fin (2) includes a protective plate (21) with a corrugated structure. A positioning frame (22) is sleeved on the outer side of the protective plate (21). The protective plate (21) and the positioning frame (22) are slidably matched. The positioning frame (22) is fixed on the side wall of the base pipe (1). The upper and lower sides of the positioning frame (22) are locked and fixed by locking bolts (23).

4. The protective, corrosion-resistant microchannel heat exchanger according to claim 1, characterized in that: One side of the upper water collecting pipe (14) is connected to each microchannel pipe (11) through a plurality of water distribution pipes (143), and one side of the lower water collecting pipe (15) is connected to each microchannel pipe (11) through a plurality of water collecting pipes (153).

5. The protective, corrosion-resistant microchannel heat exchanger according to claim 1, characterized in that: The microchannel tubes (11) are arranged at equal intervals.

6. The protective, corrosion-resistant microchannel heat exchanger according to claim 4, characterized in that: An upper retaining net (141) is installed on the inner wall of the upper water collecting pipe (14) near the water diversion pipe (143), and a lower retaining net (151) is installed on the inner wall of the lower water collecting pipe (15) near the water collecting pipe.

7. The protective, corrosion-resistant microchannel heat exchanger according to claim 4, characterized in that: The top of the upper water collecting pipe (14) is connected to the water inlet end (12) via a water inlet joint (142), and the top of the lower water collecting pipe (15) is connected to the water outlet end (13) via a water outlet joint (152).

8. The protective, corrosion-resistant microchannel heat exchanger according to claim 2, characterized in that: The height of the fin (2) above the outer surface of the microchannel tube (11) is 10 mm.

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