Fluidization-equalizing micro-channel heat exchanger system and final assembly method thereof

Abstract

The invention discloses a flow equalizing micro-channel heat exchanger system and a final assembly method thereof. A heat exchanger comprises a heat exchanger body, an inlet seal head, an impeller rectifier and an impeller assembly unit, wherein the impeller rectifier is arranged in the heat exchanger body and close to the interface of the inlet seal head, and the impeller assembly unit is used for overall assembly of the heat exchanger body, the inlet seal head and the impeller rectifier. On the basis of an impeller rectification optimization scheme, the heat dissipation performance of the printed circuit board heat exchanger is improved, a system final assembly scheme is perfected, final assembly technological procedure setting and implementation are facilitated, machining and manufacturing of the impeller heat exchanger are pushed to be standardized, production efficiency and quality are improved, and practicability is higher; besides, the invention specifically discloses characteristic parameters of a radiator main body structure and an impeller structure, and laterally discloses an effective size proportion of heat dissipation optimization, thereby being more beneficial to reference and implementation of technicians in the field, and proving feasibility and effectiveness of a heat dissipation scheme through finite element simulation.

Description

Technical Field

[0001] The present invention belongs to the technical field of microchannel heat exchangers, and more specifically, relates to a uniform flow microchannel heat exchanger system and an assembly method thereof. Background Art

[0002] With the continuous innovation of energy, power systems and technologies, the requirements for the key role of heat transfer in the system are gradually increasing. Traditional heat exchangers cannot meet the comprehensive design requirements of high temperature, high pressure, compactness, lightweight and reliability. As a highly efficient and compact microchannel heat exchanger, printed circuit heat exchanger (PCHE) has been widely used for its high compactness, high temperature and high pressure resistance. In the field of PCHE, a lot of research has been carried out on channel structure and flow medium, but these studies are based on the premise that the fluid in each channel is evenly distributed. However, there are many microchannels in PCHE. At present, there is a common problem of uneven flow distribution in the use of PCHE. The peripheral channels cannot be used, resulting in a decrease in the overall heat transfer efficiency. The central channel has a large pressure drop due to the high flow rate, which causes the performance of the PCHE heat exchanger to decrease. Therefore, a method for improving the internal rectification effect of printed circuit board heat exchanger is proposed, which is of great significance to improve the heat transfer efficiency.

[0003] In order to solve the above technical problems, people have modified the external structure of PCHE, changed the structure of the inlet head into an arc type, or modified the inlet model or designed the placement position. In addition, Chinese invention patent CN112097566B discloses a rectifier structure of a printed circuit board heat exchanger, which belongs to the field of engineering application technology of heat transfer, and specifically relates to a heat exchanger rectifier device. It solves the problem that the existing printed circuit board heat exchanger has uneven inlet flow distribution, resulting in low actual heat exchange efficiency. The rectifier structure of the present invention includes a square frame, and the square frame is clamped in the square channel inlet of the heat exchanger head; an impeller is fixed in the square frame, and the impeller includes an inner ring, an outer ring and a plurality of curved blades, and the plurality of curved blades are evenly spaced between the inner ring and the outer ring, and the outer ring is inscribed in the square frame to form an integral part.

[0004] The above technical methods have improved the overall performance of the heat exchanger to a certain extent, but there are still the following technical problems or improvement directions: (1) This modification of the external structure of PCHE destroys the original structure of PCHE, and the uniformity enhancement brought about is very limited, especially when the flow rate of the pipe is too large, a recirculation zone will be formed in the sudden expansion part. According to our research, although the structure of the inlet head is changed to an arc type, a recirculation zone will still be generated in the sudden expansion part, which cannot be solved by changing the inlet model structure; (2) Modification of the inlet model or design of the placement position will affect the installation conditions of PCHE. There are certain requirements, which greatly limits the use of PCHE; (3) Patent technology CN112097566B adopts a built-in impeller rectification method. Compared with the shape modification of the original structure such as the external structure or the placement position, this method has significantly improved the rectification effect. However, on the one hand, it only discloses the shape and size of the impeller, but does not disclose the overall size of the printed circuit board heat exchanger at the same time, which makes it difficult for technical personnel in this field to implement and apply it; on the other hand, the patent technology does not provide a detailed impeller assembly plan, resulting in a large technical defect in the integrated integration of the impeller rectifier. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a uniformly-flown microchannel heat exchanger system and an assembly method thereof. Based on the impeller rectification optimization scheme, the heat dissipation performance of the printed circuit board heat exchanger is improved, and the system assembly scheme is improved, which facilitates the setting and implementation of the assembly process regulations, pushes the processing and manufacturing of the impeller heat exchanger towards standardization, improves the production efficiency and quality, and is more feasible. In addition, the present invention specifically discloses the characteristic parameters of the radiator main structure and the impeller structure, and discloses the effective size ratio of the heat dissipation optimization on the side, which is more conducive to the reference and implementation of technical personnel in this field, and proves the feasibility and effectiveness of the heat dissipation scheme through finite element simulation.

[0006] In order to achieve the above object, according to a first aspect of the present invention, a uniform flow microchannel heat exchanger system comprises:

[0007] A heat exchanger body, an inlet head installed at the front end of the heat exchanger body, an impeller rectifier arranged in the heat exchanger body and close to the interface of the inlet head, and an impeller assembly unit for overall assembly of the heat exchanger body, the inlet head and the impeller rectifier;

[0008] The heat exchanger body comprises a main shell, a heat exchange core disposed in the main shell and close to the outlet end, and a flow channel space located in front of the heat exchange core in the main shell; the heat exchange core contains a flow microchannel;

[0009] The front end of the inlet head is provided with a fluid input port;

[0010] The impeller assembly unit includes a sealing gasket to prevent gas leakage;

[0011] The heat exchanger body, the inlet head and the impeller rectifier are assembled into one through the impeller assembly unit.

[0012] Preferably, the impeller rectifier comprises:

[0013] A center positioning ring and impeller blades arranged around the center positioning ring.

[0014] Preferably, the impeller assembly unit comprises:

[0015] An impeller positioning assembly for positioning the impeller rectifier, an insertion side assembly provided at the front port of the main enclosure for clamping the impeller positioning assembly, and a fastening side assembly provided at the rear port of the inlet head for fixed connection with the insertion side assembly;

[0016] The loading side component comprises an inner concave card slot and an inner threaded portion provided at the front section of the inner concave card slot;

[0017] The fastening side component comprises an outer concave snap-fitting groove snap-fitting with the inner concave snap-fitting groove, and an inner threaded portion threadedly connected with the inner threaded portion.

[0018] Preferably, the impeller positioning assembly comprises:

[0019] A positioning frame whose side is clamped in the concave clamping groove, and an impeller locking assembly fixedly connected to the center of the positioning frame for locking the impeller rectifier;

[0020] The positioning frame includes a first positioning frame, a first inner support rod cross-fixed in the first positioning frame, and a second positioning frame, a second inner support rod cross-fixed in the second positioning frame.

[0021] Preferably, the impeller locking assembly comprises:

[0022] A central clamping ring and a central top column respectively fixed at the center of the first inner support rod and the second inner support rod, a locking internal thread provided in the central top column, and a locking bolt passing through the central clamping ring and thread-fastened with the locking internal thread;

[0023] Place the impeller rectifier between the first positioning frame and the second positioning frame, and pass the center top column through the center positioning ring of the impeller rectifier, and connect it by fastening with the locking bolt and the locking internal thread, and press the center positioning ring between the center top column and the center clamping ring.

[0024] Preferably, the grid protection component comprises:

[0025] The side portion of the assembly frame is clamped in the concave clamping groove, and the central grid is fixed in the assembly frame.

[0026] Preferably, a buffer layer is provided at the right end surface of the inlet head, and the material is rubber.

[0027] Preferably, the internal cross-sectional area of ​​the main enclosure is 30000-50000mm 2 , the length of the flow channel space is greater than 300 mm;

[0028] The number of blades, the outer diameter of the center positioning ring and the blade pitch of the impeller rectifier are 3 to 5, 20 to 40 mm and 150 to 250 mm respectively.

[0029] Preferably, the number of blades, the outer diameter of the center positioning ring, and the blade pitch of the impeller rectifier are 4, 40 mm, and 150 mm, respectively.

[0030] According to a second aspect of the present invention, a method for assembling a uniform flow microchannel heat exchanger system comprises the following steps:

[0031] S100: First, a pre-installation stage is performed, in which the impeller rectifier is placed between the first positioning frame and the second positioning frame, and the center top column is passed through the center positioning ring of the impeller rectifier, and the center positioning ring is pressed between the center top column and the center pressing ring by means of a locking bolt and a locking internal thread, thereby completing the pre-installation of the impeller positioning assembly and the impeller rectifier;

[0032] S200: Install the grid protection assembly and the pre-installed components as a whole into the concave mounting groove, so that the two grid protection assemblies are clamped and installed into the concave mounting groove, and the impeller rectifier and the heat exchanger body are loaded;

[0033] S300: Install the sealing gasket into the left section of the outer concave mounting groove, and align the fastening side assembly on the right side of the inlet head with the side assembly of the heat exchanger body, and position them with each other through threaded connection until the gap between the right end face of the inlet head and the left end face of the heat exchanger body is eliminated, completing the assembly of the heat exchanger.

[0034] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0035] 1. A uniform flow microchannel heat exchanger system of the present invention, based on an impeller rectification optimization scheme, achieves an improvement in the heat dissipation performance of a printed circuit board heat exchanger, improves the system assembly scheme, facilitates the setting and implementation of assembly process regulations, pushes the processing and manufacturing of impeller heat exchangers toward standardization, improves production efficiency and quality, and is more feasible; in addition, the present invention specifically discloses characteristic parameters of the radiator main structure and impeller structure, and discloses the effective size ratio of heat dissipation optimization on the side, which is more conducive to the reference and implementation of technical personnel in this field, and proves the feasibility and effectiveness of the heat dissipation scheme through finite element simulation.

[0036] 2. A uniform flow microchannel heat exchanger system of the present invention adds a grid protection component 5 on both sides of the front and rear of the impeller assembly unit 4. On the one hand, the grid structure can prevent the impeller rectifier 2 from breaking blades and blocking the heat exchange core 110 under long-term airflow impact, thereby ensuring the safety margin and reliability of the heat exchanger. On the other hand, the uniform grid structure also has a certain effect on the uniformity of the internal airflow, thereby improving the overall heat dissipation efficiency.

[0037] 3. A uniform flow microchannel heat exchanger system of the present invention can eliminate the gap between the outer concave mounting groove 431 and the inner concave mounting groove 411 during the assembly of the heat exchanger body 1, the inlet head 3 and the impeller rectifier 2 by setting a rubber elastic-plastic cushion layer at the end surface, thereby effectively ensuring the integrity and fault tolerance of the assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is an overall assembly diagram of a uniformly fluidized microchannel heat exchanger system according to an embodiment of the present invention;

[0039] Figure 2 This is an overall structural diagram of a fastening side component of a uniform flow microchannel heat exchanger system according to an embodiment of the present invention;

[0040] Figure 3 This is a structural diagram of a grid protection component of a uniformly fluidized microchannel heat exchanger system according to an embodiment of the present invention;

[0041] Figure 4 This is a structural diagram of a positioning framework of a uniformly fluidized microchannel heat exchanger system according to an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the inlet head structure of a uniform flow microchannel heat exchanger system according to an embodiment of the present invention;

[0043] Figure 6 A schematic diagram of the three-dimensional position relationship structure of a uniform flow microchannel heat exchanger system according to an embodiment of the present invention;

[0044] Figure 7This is a schematic diagram of the oblique side structure of an impeller rectifier of a flow-uniformized microchannel heat exchanger system according to an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the front structure of an impeller rectifier of a flow-uniformed microchannel heat exchanger system according to an embodiment of the present invention;

[0046] Fig. 9 This is a schematic diagram of the side structure of a uniform flow microchannel heat exchanger system according to an embodiment of the present invention;

[0047] Fig.10 This is an internal streamline diagram of a heat exchanger in a non-impeller state of a uniformly fluidized microchannel heat exchanger system according to an embodiment of the present invention;

[0048] Fig.11 The internal streamline diagram of a heat exchanger with an impeller in a uniform flow microchannel heat exchanger system according to an embodiment of the present invention

[0049] Fig.12 A flow velocity cloud diagram of a heat exchanger in a non-impeller state of a uniformly-flown microchannel heat exchanger system according to an embodiment of the present invention;

[0050] Fig.13 A flow velocity cloud diagram of a heat exchanger in an impeller state of a uniform flow microchannel heat exchanger system according to an embodiment of the present invention;

[0051] Fig.14 A comparative reference diagram of the uniformity coefficient α of fluid flow in different cross sections of a uniform flow microchannel heat exchanger system according to an embodiment of the present invention;

[0052] Fig.15 This is a curve diagram showing the variation of the heat transfer coefficient h of a uniform flow microchannel heat exchanger system with the flow non-uniformity coefficient α according to an embodiment of the present invention;

[0053] Fig.16 The velocity cloud diagram distribution of the microchannel when α=1.06 in a uniformly fluidized microchannel heat exchanger system according to an embodiment of the present invention;

[0054] Fig.17 The velocity cloud diagram distribution of the microchannel when α=0.08 of a uniformly fluidized microchannel heat exchanger system according to an embodiment of the present invention;

[0055] Fig.18 The flow velocity distribution on the center line of the microchannel of a uniformly fluidized microchannel heat exchanger system under α=1.06 and α=0.08 according to an embodiment of the present invention;

[0056] Fig.19 The present invention is a flowchart of an assembly method of a uniform flow microchannel heat exchanger system according to an embodiment of the present invention.

[0057] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-heat exchanger body, 100-main shell, 110-heat exchange core, 120-flow channel space, 2-impeller rectifier, 201-impeller blade, 202-center positioning ring, 3-inlet head, 301-fluid input port, 4-impeller assembly unit, 410-loading side component, 411-inner concave card groove, 412-internal thread part, 420-impeller positioning component, 421- A positioning frame, 422-a first inner support rod, 423-a second positioning frame, 424-a second inner support rod, 425-an impeller locking assembly, 4251-a locking bolt, 4252-a center clamping ring, 4253-a center top column, 4254-a locking inner thread, 430-a fastening side assembly, 431-an outer concave card slot, 432-an outer threaded portion, 5-a grid protection assembly, 501-an assembly frame, 502-a center grid, 6-a sealing gasket, and 7-a buffer layer. DETAILED DESCRIPTION

[0058] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0060] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0062] like Figures 1 to 18 As shown, in an embodiment of the present invention, the uniform flow microchannel heat exchanger system comprises:

[0063] A heat exchanger body 1, an inlet head 3 installed at the front end of the heat exchanger body 1, an impeller rectifier 2 arranged in the heat exchanger body 1 and close to the interface of the inlet head 3, and an impeller assembly unit 4 for overall assembly of the heat exchanger body 1, the inlet head 3 and the impeller rectifier 2;

[0064] The heat exchanger body includes a main shell 100, a heat exchange core disposed in the main shell 100 and close to the outlet end, and a flow channel space 120 located in the front section of the heat exchange core in the main shell 100; the heat exchange core contains a flow microchannel;

[0065] The front end of the inlet head 3 is provided with a fluid input port 301;

[0066] The impeller assembly unit 4 includes a sealing gasket 6 to prevent gas leakage;

[0067] The heat exchanger body 1 , the inlet head 3 and the impeller rectifier 2 are assembled into one through the impeller assembly unit 4 .

[0068] like Figure 1 and Figure 6 to Figure 9 As shown, in an embodiment of the present invention, the impeller rectifier 2 includes:

[0069] A center positioning ring 202 and impeller blades 201 arranged around the center positioning ring 202 .

[0070] like Figure 1 to Figure 5 As shown, in the embodiment of the present invention, the impeller assembly unit 4 comprises:

[0071] An impeller positioning assembly 420 for positioning the impeller rectifier 2, an insertion side assembly 410 provided at the front port of the main enclosure 100 for clamping the impeller positioning assembly 420, and a fastening side assembly 430 provided at the rear port of the inlet head 3 for fixed connection with the insertion side assembly 410;

[0072] The loading side component 410 includes an inner concave card slot 411 and an inner thread portion 412 provided at the front section of the inner concave card slot 411;

[0073] The fastening side component 430 includes an outer concave snap-fitting groove 431 snap-fitting with the inner concave snap-fitting groove 411 and an inner threaded portion 412 threadedly connected with the inner threaded portion 412 .

[0074] like Figure 1 to Figure 5 As shown, in the embodiment of the present invention, the impeller positioning assembly 420 includes:

[0075] A positioning frame whose side is clamped in the concave clamping groove 411, and an impeller locking component 425 fixedly connected to the center of the positioning frame for locking the impeller rectifier 2;

[0076] The positioning frame includes a first positioning frame 421 , a first inner support rod 422 cross-fixed in the first positioning frame 421 ; a second positioning frame 423 , and a second inner support rod 424 cross-fixed in the second positioning frame 423 .

[0077] like Figure 1 to Figure 5 As shown, in the embodiment of the present invention, the impeller locking assembly 425 includes:

[0078] A central clamping ring 4252 and a central top column 4253 respectively fixed at the center of the first inner support rod 422 and the second inner support rod 424, a locking internal thread 4254 provided in the central top column 4253, and a locking bolt 4251 passing through the central clamping ring 4252 and threadedly fastened to the locking internal thread 4254;

[0079] Place the impeller rectifier 2 between the first positioning frame 421 and the second positioning frame 423, and make the center top column 4253 pass through the center positioning ring 202 of the impeller rectifier 2, and fasten and connect it with the locking bolt 4251 and the locking internal thread 4254, and press the center positioning ring 202 between the center top column 4253 and the center clamping ring 4252.

[0080] like Figure 1 and Figure 3 As shown, in an embodiment of the present invention, the grid protection component 5 includes:

[0081] An assembling frame 501 whose side is clamped in the concave clamping groove 411 and a central grid 502 fixed in the assembling frame 501 .

[0082] In the embodiment of the present invention, a grid protection component 5 is added to the front and rear sides of the impeller assembly unit 4. On the one hand, the grid structure can limit the blade breakage of the impeller rectifier 2 and blockage of the heat exchange core 110 under long-term airflow impact, thereby ensuring the safety margin and reliability of the heat exchanger. On the other hand, the uniform grid structure also has a certain effect on the uniformity of the internal airflow, thereby improving the overall heat dissipation efficiency.

[0083] like Figure 1 As shown, in the embodiment of the present invention, a buffer layer 7 is provided at the right end surface of the inlet head 3, and the material is rubber.

[0084] In the embodiment of the present invention, by arranging a rubber elastic-plastic cushion layer at the end surface, it is possible to eliminate the gap in the assembly between the outer concave snap-in groove 431 and the inner concave snap-in groove 411 during the assembly of the heat exchanger body 1, the inlet head 3 and the impeller rectifier 2, thereby effectively ensuring the integrity and fault tolerance of the assembly.

[0085] like Figures 7 to 9 As shown, in the embodiment of the present invention, the internal cross-sectional area of ​​the main enclosure is 30000-50000mm 2 , the length of the flow channel space 120 is greater than 300 mm;

[0086] The number of blades, the outer diameter of the center positioning ring, and the blade pitch of the impeller rectifier 2 are 3 to 5, 20 to 40 mm, and 150 to 250 mm, respectively.

[0087] like Figures 7 to 9 As shown, in the embodiment of the present invention, the number of blades, the outer diameter of the center positioning ring, and the blade pitch of the impeller rectifier 2 are 4, 40 mm, and 150 mm, respectively.

[0088] The performance analysis and demonstration of the simulation model for this embodiment is as follows: Engineering experience shows that when the flow channel is long enough, the fluid will always be uniform, but PCHE is a miniature heat exchanger, and compactness is one of its characteristics. We want to achieve uniform development of the flow field in the smallest space. After our research, we found that adding an impeller rectifier at the inlet head for rectification can achieve this goal. On the wall, the impeller rectifier destroys the streamlines of the reflow, which can effectively avoid the formation of the reflow zone. The destruction of the reflow zone on the wall by the impeller is one of the reasons why it has a rectifying effect; secondly, when the fluid enters the PCHE from the connecting pipe, the flow field shows a central concentration phenomenon, and the central flow field will be dispersed after impacting the impeller, which accelerates the full development of the flow field. The destruction of the flow field by the impeller rectifier, especially the central flow field, is also one of the reasons why it has a rectifying effect. For specific streamline diagrams, please refer to Figure 10-11 .

[0089] like Fig.14 As shown in Table 1, in order to more intuitively represent the rectification effect, we introduce the flow non-uniformity coefficient α to characterize the distribution of the fluid. We compare the flow distribution at different positions of the flow channel with and without the impeller. The results are shown in Table 1. It can be found that the rectification effect of the impeller on the flow field is very obvious.

[0090]

[0091] In the formula, ulocal is the velocity of each point on a certain cross section along the flow direction (m / s), u ave is the average velocity along the flow direction of a certain section (m / s), and S is the area of ​​a certain section (m2).

[0092] Table 1 Comparison of flow uniformity coefficient α of fluids in different cross sections

[0093]

[0094] Combination Fig.15 As shown in Table 2, we compare the heat transfer coefficient h of PCHE at different α and find that when the flow distribution is poor, the efficiency of the core part of the PCHE heat exchange will be greatly reduced.

[0095] Table 2 Values ​​of h at different α

[0096]

[0097] like Figure 12-13 As shown in the figure, in order to further demonstrate the principle of uniformity for improving PCHE performance, we selected the velocity cloud diagram of the PCHE heat exchange channel and the channel entrance when the flow uniformity coefficient α is 1.06 and 0.08. In addition, a straight line is drawn at the center of the heat exchange channel, and the velocity on the line is extracted to obtain the velocity at the center of each flow channel, as shown in the figure. Fig.18 shown.

[0098] like Figures 16-17 The figure shows the velocity distribution cloud map of the heat exchange core. It can be seen from the cloud map that when α=1.06, the velocity in the center of the flow channel is very high, and the velocity in the peripheral flow channel is very low. Since the peripheral flow channel is not fully utilized, the overall heat exchange efficiency is reduced. In addition, since the fluid is mainly concentrated in the central flow channel, it can be seen from the fluid resistance formula that the flow resistance is positively correlated with the square of the flow velocity. When α=1.06, the velocity of the central fluid is about 14 times the fluid velocity when α=0.08. At high flow rates, the resistance to the fluid is greatly increased, which leads to an increase in the overall resistance, thereby affecting the overall heat exchange efficiency.

[0099] It can be seen from the above demonstration that the heat exchange efficiency of the heat exchanger in the embodiment of the present invention is significantly improved, which proves the effectiveness of the solution.

[0100] like Fig.19 As shown, in an embodiment of the present invention, the assembly method of a uniform flow microchannel heat exchanger system comprises the following steps:

[0101] S100: First, the pre-installation stage is performed, the impeller rectifier 2 is placed between the first positioning frame 421 and the second positioning frame 423, and the center top column 4253 passes through the center positioning ring 202 of the impeller rectifier 2, and is fastened and matched with the locking bolt 4251 and the locking internal thread 4254, and the center positioning ring 202 is pressed between the center top column 4253 and the center clamping ring 4252, so as to complete the pre-installation of the impeller positioning assembly and the impeller rectifier;

[0102] S200: Next, the grid protection assembly 5 and the pre-assembled components are integrally installed into the concave mounting groove 411, so that the two grid protection assemblies 5 are clamped and installed into the concave mounting groove 411, and the loading of the impeller rectifier and the heat exchanger body 1 is completed;

[0103] S300: Next, install the sealing gasket into the left section of the concave mounting groove 431, and align the right side fastening side assembly 430 of the inlet head with the side assembly 410 of the heat exchanger body, and position them with each other through threaded connection until the gap between the right end face of the inlet head and the left end face of the heat exchanger body is eliminated, completing the assembly of the heat exchanger.

[0104] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A uniform flow microchannel heat exchanger system, characterized in that: include: A heat exchanger body (1), an inlet head (3) installed at the front end of the heat exchanger body (1), an impeller rectifier (2) arranged in the heat exchanger body (1) and close to the interface of the inlet head (3), and an impeller assembly unit (4) for overall assembly of the heat exchanger body (1), the inlet head (3) and the impeller rectifier (2); The heat exchanger body comprises a main enclosure (100), a heat exchange core disposed in the main enclosure (100) and close to an outlet end, and a flow channel space (120) located in the front section of the heat exchange core in the main enclosure (100); the heat exchange core contains a flow microchannel; The front end of the inlet cover (3) is provided with a fluid input port (301); The impeller assembly unit (4) comprises a sealing gasket (6) for preventing gas leakage; The heat exchanger body (1), the inlet head (3) and the impeller rectifier (2) are assembled into one piece through the impeller assembly unit (4).

2. A uniform flow microchannel heat exchanger system according to claim 1, characterized in that: The impeller rectifier (2) comprises: A central positioning ring (202) and impeller blades (201) arranged around the central positioning ring (202).

3. The uniform flow microchannel heat exchanger system according to claim 2, characterized in that: The impeller assembly unit (4) comprises: An impeller positioning assembly (420) for positioning the impeller rectifier (2), an insertion side assembly (410) provided at the front port of the main enclosure (100) for clamping the impeller positioning assembly (420), and a fastening side assembly (430) provided at the rear port of the inlet head (3) for fixed connection with the insertion side assembly (410); The loading side component (410) comprises an inner concave mounting groove (411) and an inner threaded portion (412) provided at the front section of the inner concave mounting groove (411); The fastening side component (430) comprises an outer concave snap-fitting groove (431) snap-fitting with the inner concave snap-fitting groove (411), and an inner threaded portion (412) threadably connected to the inner threaded portion (412).

4. A uniform flow microchannel heat exchanger system according to claim 3, characterized in that: The impeller positioning assembly (420) comprises: A positioning frame whose side is clamped in the concave clamping groove (411), and an impeller locking assembly (425) fixedly connected to the center of the positioning frame for locking the impeller rectifier (2); The positioning frame comprises a first positioning frame (421), a first inner support rod (422) cross-fixed in the first positioning frame (421); a second positioning frame (423), and a second inner support rod (424) cross-fixed in the second positioning frame (423).

5. The uniform flow microchannel heat exchanger system according to claim 4, characterized in that: The impeller locking assembly (425) comprises: A central clamping ring (4252) and a central top column (4253) respectively fixed at the center of the first inner support rod (422) and the second inner support rod (424), a locking internal thread (4254) provided in the central top column (4253), and a locking bolt (4251) passing through the central clamping ring (4252) and threadedly fastened to the locking internal thread (4254); The impeller rectifier (2) is placed between the first positioning frame (421) and the second positioning frame (423), and the center top column (4253) passes through the center positioning ring (202) of the impeller rectifier (2), and is fastened and connected by the locking bolt (4251) and the locking internal thread (4254), and the center positioning ring (202) is pressed between the center top column (4253) and the center clamping ring (4252).

6. The uniform flow microchannel heat exchanger system according to claim 5, characterized in that: The grid protection component (5) comprises: An assembly frame (501) whose side is clamped in the concave clamping groove (411) and a central grid (502) fixed in the assembly frame (501).

7. The uniform flow microchannel heat exchanger system according to claim 6, characterized in that: A buffer layer (7) is provided at the right end surface of the inlet seal head (3), and the material is rubber.

8. The uniform flow microchannel heat exchanger system according to claim 7, characterized in that: The internal cross-sectional area of ​​the main enclosure is 30000-50000mm 2 , the length of the flow channel space (120) is greater than 300 mm; The number of blades, the outer diameter of the center positioning ring, and the blade pitch of the impeller rectifier (2) are 3 to 5, 20 to 40 mm, and 150 to 250 mm, respectively.

9. The uniform flow microchannel heat exchanger system according to claim 8, characterized in that: The number of blades, the outer diameter of the center positioning ring, and the blade pitch of the impeller rectifier (2) are 4, 40 mm, and 150 mm, respectively.

10. The method for assembling a uniform flow microchannel heat exchanger system according to claim 9, comprising the following steps: S100: First, a pre-installation stage is performed, wherein the impeller rectifier (2) is placed between the first positioning frame (421) and the second positioning frame (423), and the center top column (4253) is passed through the center positioning ring (202) of the impeller rectifier (2), and the locking bolt (4251) and the locking internal thread (4254) are fastened and matched to each other, and the center positioning ring (202) is pressed between the center top column (4253) and the center clamping ring (4252), thereby completing the pre-installation of the impeller positioning assembly and the impeller rectifier; S200: The grid protection assembly (5) and the pre-assembled components are integrally installed into the concave mounting groove (411), so that the two grid protection assemblies (5) are clamped and installed into the concave mounting groove (411), thereby completing the loading of the impeller rectifier and the heat exchanger body (1); S300: Install the sealing gasket into the left section of the concave mounting groove (431), and align the right side fastening side assembly (430) of the inlet head with the side assembly (410) of the heat exchanger body, and position them with each other through threaded connection until the gap between the right end face of the inlet head and the left end face of the heat exchanger body is eliminated, completing the assembly of the heat exchanger.

Images