Efficient micro-channel heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, in particular to an efficient micro-channel heat exchanger which comprises a liquid inlet collecting pipe and a liquid outlet collecting pipe, the interiors of the liquid inlet collecting pipe and the liquid outlet collecting pipe are communicated through a flat pipe, a plurality of parallel micro-channels are arranged in the flat pipe, and the flat pipe is bent for multiple times to form a plurality of spaces for containing fins. The fins are provided with guide grooves, and the flat pipes are provided with guide strips matched with the guide grooves. At least one of the liquid inlet collecting pipe and the liquid outlet collecting pipe is connected with a flow aiding device, and the flow aiding device comprises a propeller arranged in the collecting pipe; the heat dissipation fins are convenient to install and also convenient to take down to be cleaned and maintained, so that the heat resistance is low, the air flow speed between holes is high, and the heat exchange efficiency is guaranteed; and the flow aiding device is arranged for increasing the flow speed of the internal refrigerant, blocking is prevented, and efficient work of the heat exchanger is achieved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a high-efficiency microchannel heat exchanger. Background Technology

[0002] Heat exchangers play a crucial role in heat exchange across numerous industrial and civil sectors. With the increasing demand for miniaturized equipment and high energy efficiency, higher requirements are being placed on heat exchanger performance. Continuous research and development of technologies and structural improvements can enhance heat exchanger efficiency, further meeting the comprehensive needs of high-efficiency heat exchange, low energy consumption, and compact size. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency microchannel heat exchanger that significantly improves the working efficiency of the heat exchanger through various means.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A high-efficiency microchannel heat exchanger includes an inlet manifold and an outlet manifold, which are connected internally by a flat tube. The flat tube has multiple parallel microchannels inside, and the flat tube is bent multiple times to form multiple spaces to accommodate fins. The fins are provided with guide grooves, and the flat tube is provided with guide strips that match the guide grooves.

[0006] At least one of the inlet manifold and the outlet manifold is connected to a flow aid device, which includes a propeller disposed inside the manifold.

[0007] Furthermore, one end of the fin is provided with a locking pin, the movable head of the locking pin facing downwards, and the flat tube is provided with a socket that matches the movable head of the locking pin.

[0008] Furthermore, the flow aid device includes a motor disposed outside the flow collector, the motor being connected to a propeller via a rotating shaft passing through the inside and outside of the flow collector, and a rotary seal being disposed between the rotating shaft and the flow collector.

[0009] Furthermore, both the inlet manifold and the outlet manifold are connected to external connectors, and the propeller is positioned between the microchannel and the connector.

[0010] Furthermore, at least one guide groove is provided on both the upper and lower sides where the fin contacts the flat tube.

[0011] Furthermore, the bends and turns of the flat tube are rounded, and the flat tube as a whole has at least two rounded turning angles.

[0012] Furthermore, the sides of the fins are continuously undulating corrugated.

[0013] Furthermore, the guide strip is arranged parallel to the microchannel.

[0014] Furthermore, reinforcing ribs are provided at the connection points between the inlet manifold and the outlet manifold and the outside of the flat tube.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The heat dissipation fins in this invention are not only easy to install, but also easy to remove for cleaning and maintenance, resulting in low thermal resistance and fast airflow between the pores, ensuring heat exchange efficiency. A flow aid device is provided to increase the flow rate of the internal refrigerant, prevent blockage, and achieve efficient operation of the heat exchanger. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the BB direction;

[0020] Figure 4 This is a front view of the present invention;

[0021] Figure 5 This is a three-dimensional structural diagram of the present invention from another angle;

[0022] Figure 6 This is a three-dimensional structural diagram of the fin in this utility model.

[0023] In the diagram: 1. Inlet manifold; 2. Outlet manifold; 3. Flat tube; 3a. Microchannel; 3b. Guide bar; 3c. Insertion hole; 4. Fin; 4a. Guide groove; 4b. Lock; 5. Flow aid device; 5a. Propeller; 5b. Motor; 5c. Rotary seal; 6. Connector; 7. Reinforcing rib. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this technical solution according to the specific circumstances.

[0025] like Figures 1-6 As shown, a high-efficiency microchannel heat exchanger includes an inlet manifold 1 and an outlet manifold 2, which are internally connected by a flat tube 3. The flat tube 3 has multiple parallel microchannels 3a inside. The flat tube 3 is bent multiple times to form multiple spaces to accommodate fins 4. These spaces have U-shaped openings. The fins 4 are provided with guide grooves 4a, and the flat tube 3 is provided with guide strips 3b that match the guide grooves 4a. The guide strips 3b are arranged parallel to the microchannels 3a. At least one guide groove 4a is provided on both the upper and lower sides of the fins 4 that contact the flat tube 3. Based on the sliding fit of the guide grooves 4a and the guide strips 3b, the fins 4 can be inserted into the spaces formed by the bending of the flat tube 3 from the U-shaped openings, preventing the fins 4 from shifting out of the flat tube 3 during insertion or use. This design makes the fins 4 not only easy to install but also easy to remove for cleaning and maintenance.

[0026] During the use of the heat exchanger, dust will form a heat insulation layer on the surface of fin 4, which increases thermal resistance, hinders the transfer of heat from the fins to the air, and also narrows the air passage, increasing the resistance when the airflow passes through. Therefore, the convenient installation and removal of fin 4 can ensure the efficient operation of the heat exchanger.

[0027] To secure the fin 4 after it is mounted on the flat tube 3, a locking pin 4b is provided at one end of the fin 4. The movable end of the locking pin 4b faces downward. The flat tube 3 is provided with a socket 3c that matches the movable end of the locking pin 4b. Moving the locking pin 4b downward so that its head is inserted into the socket 3c can prevent the fin 4 from coming out of the "U"-shaped opening of the flat tube 3. When it is necessary to remove the fin 4, the locking pin 4b is moved upward away from the socket 3c.

[0028] On the other hand, at least one of the inlet manifold 1 and the outlet manifold 2 is connected to a flow aid device 5. The flow aid device 5 is used to increase the refrigerant flow rate, prevent blockage, and achieve efficient operation of the heat exchanger. Specifically, the flow aid device 5 includes a propeller 5a installed inside the manifold and a motor 5b installed outside the manifold. The motor 5b is connected to the propeller 5a via a shaft that passes through the inside and outside of the manifold. A rotary seal 5c is provided between the shaft and the manifold. The rotary seal 5c is a device used to seal the gap between relatively rotating parts, preventing liquid or gas leakage from the gap between the rotating shaft and the stationary part, and also preventing external impurities from entering the equipment. Both the inlet manifold 1 and the outlet manifold 2 are connected to external connectors 6 for connecting the refrigerant input and output pipes, as detailed below. Figure 3 As shown, the propeller 5a is positioned between the microchannel 3a and the connector 6, driving the propeller 5a to rotate, thereby accelerating the fluid flow rate passing through the area and improving the heat exchanger's working efficiency.

[0029] Further optimization involves rounded corners at the bends of the flat tube 3, which facilitates bending and reduces internal fluid resistance. The flat tube 3 has at least two rounded bends. The sides of the fins 4 are continuously undulating corrugated. Compared to flat fins, the corrugated heat dissipation fins 4 have a significantly increased surface area. The corrugated structure of the fins allows them to provide more surface area for heat exchange within the same volume. The inlet manifold 1 and the outlet manifold 2 are connected to the flat tube (3) by welding reinforcing ribs 7, ensuring a secure connection and structural strength.

[0030] This invention ensures efficient and stable heat exchange of the heat exchanger, continuously leveraging its high efficiency and energy-saving advantages. It can be widely used in heat exchange processes in air conditioning, refrigeration, chemical, and automotive industries, promoting technological progress and equipment upgrades in the industry. Various refrigerants such as R404a and R134a can be cooled using this heat exchanger, resulting in uniform heat exchange.

[0031] The working process of the high-efficiency microchannel heat exchanger disclosed in this utility model is as follows: Based on the sliding fit of the guide groove 4a and the guide bar 3b, the fins 4 can be inserted into the space formed by the bending of the flat tube 3 from the "U"-shaped opening. Moving the locking pin 4b down so that its head end is locked into the insertion hole 3c can prevent the fins 4 from coming out of the "U"-shaped opening of the flat tube 3. When it is necessary to remove the fins 4 for cleaning and maintenance, the locking pin 4b can be moved up. During the heat exchange process, the motor 5b is started to drive the propeller 5a to rotate, thereby accelerating the flow rate of the refrigerant fluid passing through the area and improving the heat exchange efficiency.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. It should be noted that for those skilled in the art, any related changes, modifications or additions made without departing from the concept of the present utility model should fall within the protection scope of the present utility model.

Claims

1. A high-efficiency microchannel heat exchanger, characterized in that: It includes an inlet manifold (1) and an outlet manifold (2), which are connected internally by a flat tube (3). The flat tube (3) has multiple parallel microchannels (3a) inside. The flat tube (3) is bent multiple times to form multiple spaces to accommodate fins (4). The fins (4) are provided with guide grooves (4a) and the flat tube (3) is provided with guide strips (3b) that match the guide grooves (4a). At least one of the inlet manifold (1) and the outlet manifold (2) is connected to a flow aid device (5), which includes a propeller (5a) disposed inside the manifold.

2. The high-efficiency microchannel heat exchanger according to claim 1, characterized in that: One end of the fin (4) is provided with a lock (4b), the movable end of the lock (4b) is downward, and the flat tube (3) is provided with a socket (3c) that matches the movable end of the lock (4b).

3. The high-efficiency microchannel heat exchanger according to claim 1, characterized in that: The flow aid device (5) includes a motor (5b) disposed outside the flow collector tube. The motor (5b) is connected to a propeller (5a) through a rotating shaft that passes through the inside and outside of the flow collector tube. A rotating seal (5c) is provided between the rotating shaft and the flow collector tube.

4. The high-efficiency microchannel heat exchanger according to claim 1, characterized in that: Both the inlet manifold (1) and the outlet manifold (2) are connected to the external connector (6), and the propeller (5a) is located between the microchannel (3a) and the connector (6).

5. The high-efficiency microchannel heat exchanger according to claim 1, characterized in that: The fin (4) has at least one guide groove (4a) on both the upper and lower sides that are in contact with the flat tube (3).

6. The high-efficiency microchannel heat exchanger according to claim 5, characterized in that: The bends of the flat tube (3) are rounded, and the flat tube (3) as a whole has at least two rounded bends.

7. A high-efficiency microchannel heat exchanger according to claim 6, characterized in that: The fin (4) has a continuously undulating corrugated shape on its side.

8. The high-efficiency microchannel heat exchanger according to claim 1, characterized in that: The guide bar (3b) is arranged in parallel with the microchannel (3a).

9. A high-efficiency microchannel heat exchanger according to claim 1, characterized in that: The inlet manifold (1) and outlet manifold (2) are provided with reinforcing ribs (7) at the external connection points with the flat tube (3).

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