Micro-channel heat exchanger capable of preloading refrigerant

Abstract

The utility model relates to the technical field of micro-channel heat exchangers, and discloses a micro-channel heat exchanger capable of preloading refrigerant, which comprises an outer pipe, a plurality of groups of micro-channels distributed at equal intervals are communicated and mounted in the outer pipe, the other ends of the plurality of groups of micro-channels are communicated and mounted with collecting pipes, and pipeline distribution mechanisms are mounted in the collecting pipes. According to the technical scheme, the inner pipe, the outer pipe, the collecting pipe and the flow guide pipe are annularly distributed on the outer side of the backflow cavity, the multiple sets of bent micro-channels are installed between the outer pipe and the collecting pipe, and therefore the advantages of being high in heat transfer rate, low in pressure drop and the like are achieved; compared with a conventional square heat exchanger, the heat exchanger of the device is more uniform in air cooling contact, the heat exchange efficiency is further improved, the internal heat exchange assemblies are all installed on the inner side of the outer pipe, the size of the device is greatly reduced, and the device is more convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of microchannel heat exchanger technology, specifically a microchannel heat exchanger that can be pre-loaded with refrigerant. Background Technology

[0002] Currently, the main functions of microchannel heat exchangers include heating, cooling, heat exchange, and pressure reduction. They have advantages such as high heat transfer rate, small size, and low pressure drop. They are widely used in automobiles, aviation, new energy and other fields. In particular, in the automotive field, microchannel heat exchangers can be used to cool engine water cooling systems, reduce heat accumulation in the engine and improve its service life. In the field of fuel cells, microchannel heat exchangers are used for thermal management of fuel cells to maintain their operating temperature and stability.

[0003] Among them, the microchannel heat exchanger is a highly efficient heat exchange device. Its characteristic is that it uses tiny channels to increase the contact area between the fluid and the heat exchange surface, thereby enhancing the heat exchange process.

[0004] Conventional microchannel heat exchangers on the market are rectangular, while conventional fans are disc-shaped. When the fan blows air, the four corners of the conventional microchannel heat exchanger cannot achieve good heat exchange, resulting in reduced heat exchange efficiency. Therefore, we propose a microchannel heat exchanger that can be pre-loaded with refrigerant. We design a compact microchannel heat exchanger that corresponds to the fan airflow to achieve better heat exchange effect. Utility Model Content

[0005] The purpose of this invention is to provide a microchannel heat exchanger that can be pre-loaded with refrigerant, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a microchannel heat exchanger that can be pre-loaded with refrigerant, comprising an outer tube, wherein multiple sets of equidistantly distributed microchannels are connected and installed inside the outer tube, and a manifold is connected and installed at the other end of each set of microchannels, wherein a pipe distribution mechanism is installed inside the manifold.

[0007] The pipeline distribution mechanism includes multiple sets of equally spaced branch pipes connected to the side wall of the manifold, a guide pipe connected to the other end of each set of branch pipes, multiple sets of equally spaced mounting brackets fixedly installed on the inner wall of the guide pipe, and a return cavity fixedly installed inside the multiple sets of mounting brackets.

[0008] Optionally, the manifold is located outside the guide tube, the guide tube is C-shaped, and the return cavity is located inside the guide tube.

[0009] Optionally, each group of microchannels is outwardly extended in a curved shape, the return flow cavity and the side wall of the flow guide pipe are communicated and installed with an inlet and an outlet, the flow guide pipe is communicated and installed with a refrigerant tank through the inlet and the outlet, and the refrigerant tank is installed with an electric valve at a port.

[0010] By adopting the technical scheme, the microchannel surface area is further increased, and the heat exchange efficiency is improved.

[0011] Optionally, a return flow pipe is communicated and installed at one side of the return flow cavity, and the other end of the return flow pipe is communicated and installed with the outer pipe.

[0012] Optionally, an end of the outer pipe is fixedly installed with an end cover, the other end of the outer pipe is communicated and installed with the return flow pipe, and a control valve is fixedly installed at a port of the outer pipe.

[0013] By adopting the technical scheme, the liquid in the outer pipe can be returned to the return flow cavity.

[0014] Optionally, each group of microchannels is fixedly installed with a support at one side, and the two sides of each group of supports are fixedly installed with the outer pipe and the side wall of the flow collecting pipe.

[0015] By adopting the technical scheme, each group of microchannels can be supported.

[0016] Compared with the prior art, the technical scheme has the following beneficial effects:

[0017] The technical scheme of the application is that the outer pipe, the flow collecting pipe and the flow guide pipe in the device are annularly distributed outside the return flow cavity, and a plurality of curved microchannels are installed between the outer pipe and the flow collecting pipe, so that high heat transfer rate, low pressure drop and other advantages are achieved. Since the device is distributed in a disc shape, the heat exchanger of the device is more uniformly contacted with air cooling when the fan is used for heat dissipation. Compared with a conventional square heat exchanger, the heat exchange efficiency is further improved, and the internal heat exchange components are installed inside the outer pipe, so that the device volume is greatly reduced, and the device installation is more convenient.

[0018] Each group of microchannels is fixedly installed with a support at one side, and the two sides of each group of supports are fixedly installed with the outer pipe and the side wall of the flow collecting pipe. When a plurality of outwardly curved microchannels are installed between the outer pipe and the flow collecting pipe, the supports fixedly installed at one side of each group of microchannels can support the plurality of microchannels, so that the microchannels inside the outer pipe are prevented from being bent and deformed and being unable to be used when the outer pipe is pressed. BRIEF DESCRIPTION OF DRAWINGS

[0019] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, with reference to the accompanying drawings:

[0020] Fig. 1The utility model provides a whole structure schematic diagram of microchannel heat exchanger of preloaded refrigerant,

[0021] Fig. 2 The utility model provides a distribution structure schematic diagram of flow guide pipe and backflow cavity of microchannel heat exchanger of preloaded refrigerant,

[0022] Fig. 3 The utility model provides a local amplification schematic diagram of A of microchannel heat exchanger of preloaded refrigerant.

[0023] In the drawing: 1, outer pipe; 11, microchannel; 12, header; 2, tapping pipe; 21, flow guide pipe; 22, mounting bracket; 23, backflow cavity; 24, backflow pipe; 3, support; 31, end socket; 32, control valve. Specific implementation

[0024] Please refer to Figs. 1-3 The utility model provides a technical scheme: a microchannel heat exchanger of preloaded refrigerant, including outer pipe 1, the inside intercommunication of outer pipe 1 is equipped with the microchannel 11 of multiple groups equidistance distribution, the other end of multiple groups microchannel 11 all intercommunication is equipped with header 12, and header 12 is equipped with pipeline distribution mechanism inside,

[0025] Pipeline distribution mechanism includes the tapping pipe 2 of multiple groups equidistance distribution in the lateral intercommunication of header 12, the flow guide pipe 21 of all intercommunication in the other end of each group tapping pipe 2, the mounting bracket 22 of multiple groups equidistance distribution fixed installation in the inner wall of flow guide pipe 21 and the backflow cavity 23 of fixed installation in the inside of multiple groups mounting bracket 22, and header 12 distributes in the outside of flow guide pipe 21, and flow guide pipe 21 is C-shaped flow guide pipe 21, and backflow cavity 23 distributes in the inside of flow guide pipe 21.

[0026] Through the ring distribution of device outer pipe 1, header 12 and flow guide pipe 21 all in the outside of backflow cavity 23, and make multiple groups of curved microchannel 11 install between outer pipe 1 and header 12, complete high heat transfer rate, low pressure drop and so on The advantage, simultaneously because the device is in the form of disc distribution, the device is in the fan cooling, cooperate the multiple groups of microchannel 11 in the form of disc distribution, compared with the conventional square heat exchanger, the heat exchanger of the device is more uniform with air cooling, further improve the heat exchange efficiency, and the internal heat exchange assembly is all installed in the inside of outer pipe 1, greatly reduce the device volume, make the device installation more convenient.

[0027] In this technical scheme, each group of microchannel 11 one side is fixedly installed with support 3, and each group of support 3 both sides are fixedly installed with outer pipe 1 and header 12 side wall respectively, which can support each group of microchannel 11.

[0028] When the outer tube 1 and the manifold 12 are installed with multiple groups of outwardly curved and extended microchannels 11, the support 3 is fixedly installed on one side of each group of microchannels 11, and the multiple groups of microchannels 11 can be supported, so that the microchannels 11 inside the outer tube 1 are prevented from being bent and deformed and unable to be used after the outer tube 1 is pressed.

[0029] In this technical solution, each group of microchannels 11 is curved and extends outwardly, the inlet and outlet are installed in communication with the side wall of the reflux cavity 23 and the flow guide pipe 21, the refrigerant tank is installed in communication with the flow guide pipe 21 through the inlet and outlet, the electric valve is installed at the port of the refrigerant tank, the surface area of the microchannels 11 is further increased, and the heat exchange efficiency is improved.

[0030] When the liquid is continuously distributed from the flow guide pipe 21 to the multiple groups of distribution pipes 2, the manifold 12 installed in communication with the multiple groups of distribution pipes 2 guides the liquid into the multiple groups of microchannels 11, each group of microchannels 11 is curved and extends outwardly, the surface area of each group of microchannels 11 is increased, and the heat exchange efficiency of the device is improved.

[0031] In this technical solution, the reflux pipe 24 is installed in communication with one side of the reflux cavity 23, the other end of the reflux pipe 24 is installed in communication with the outer tube 1, the end of the outer tube 1 is fixedly installed with the end cover 31, the other end of the outer tube 1 is installed in communication with the reflux pipe 24, and the control valve 32 is fixedly installed at the port of the outer tube 1, so that the liquid inside the outer tube 1 can flow back to the reflux cavity 23.

[0032] When the liquid is continuously distributed from the flow guide pipe 21 to the multiple groups of distribution pipes 2, the manifold 12 installed in communication with the multiple groups of distribution pipes 2 guides the liquid into the multiple groups of microchannels 11, and since the other end of the multiple groups of microchannels 11 is installed in communication with the outer tube 1, the liquid is continuously guided into the outer tube 1 and then guided into the reflux cavity 23 from the reflux pipe 24.

[0033] In use, after the liquid is continuously branched from the flow guide pipe 21 to the multi-component connecting pipe 2, the liquid is guided into the multi-group micro-channels 11 through the manifold 12 installed in communication with the multi-component connecting pipe 2. Each group of micro-channels 11 is curved and extends outward, so that the surface area of each group of micro-channels 11 is increased, thereby improving the heat exchange efficiency of the device. The liquid is continuously guided into the outer pipe 1 and the reflux cavity 23 from the reflux pipe 24. Since the outer pipe 1, the manifold 12, and the flow guide pipe 21 are annularly distributed outside the reflux cavity 23, and the multi-group curved micro-channels 11 are installed between the outer pipe 1 and the manifold 12, the device has the advantages of high heat transfer rate and low pressure drop. Since the device is in the form of a disc, when the fan is used for heat dissipation, the multi-group micro-channels 11 in the form of a disc can further improve the heat exchange efficiency compared with the conventional square heat exchanger. The heat exchanger of the device is more uniform in contact with the air cooling, and the internal heat exchange components are installed inside the outer pipe 1, which greatly reduces the size of the device and makes the installation more convenient. Each group of micro-channels 11 is fixedly installed with a support 3 on one side, and each group of supports 3 is fixedly installed on the side walls of the outer pipe 1 and the manifold 12. After the multi-group curved and outwardly extending micro-channels 11 are installed between the outer pipe 1 and the manifold 12, the supports 3 fixedly installed on one side of each group of micro-channels 11 can support the multi-group micro-channels 11, thereby preventing the micro-channels 11 inside the outer pipe 1 from being bent and deformed under pressure and being unable to be used.

Claims

1. A microchannel heat exchanger prechargeable with refrigerant, comprising an outer tube (1), characterized in that: The outer tube (1) is internally communicated with a plurality of groups of equidistantly distributed microchannels (11), the other ends of the plurality of groups of microchannels (11) are communicated with a header (12), and the header (12) is internally provided with a pipeline distribution mechanism; The pipeline distribution mechanism comprises a plurality of groups of equidistantly distributed tapping pipes (2) communicated with the side wall of the header (12), a flow guide pipe (21) communicated with the other end of each group of tapping pipes (2), a plurality of groups of equidistantly distributed mounting racks (22) fixedly installed on the inner wall of the flow guide pipe (21), and a plurality of groups of backflow cavities (23) fixedly installed on the inner side of the mounting racks (22).

2. A microchannel heat exchanger pre-charged with refrigerant as set forth in claim 1 wherein: The header (12) is distributed outside the flow guide pipe (21), the flow guide pipe (21) is a C-shaped flow guide pipe (21), and the backflow cavities (23) are distributed inside the flow guide pipe (21).

3. A microchannel heat exchanger pre-charged with refrigerant as set forth in claim 1 wherein: Each group of microchannels (11) is outwardly extended in a curved shape, and the backflow cavities (23) and the flow guide pipe (21) are both communicated with an inlet and an outlet.

4. A microchannel heat exchanger pre-charged with refrigerant as set forth in claim 1 wherein: The backflow cavities (23) are communicated with a backflow pipe (24) on one side, and the other end of the backflow pipe (24) is communicated with the outer tube (1).

5. A microchannel heat exchanger prechargeable with refrigerant as set forth in claim 4 wherein: One end of the outer tube (1) is fixedly provided with an end cover (31), the other end of the outer tube (1) is communicated with the backflow pipe (24), and a control valve (32) is fixedly installed at the port of the outer tube (1).

6. A microchannel heat exchanger prechargeable with refrigerant as set forth in claim 1 wherein: Each group of microchannels (11) is fixedly provided with a support (3) on one side, and each group of supports (3) is fixedly installed on the side wall of the outer tube (1) and the header (12).

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