FLUID DISTRIBUTOR AND HEAT EXCHANGER

Description

PRIORITY CLAIM

This application claims benefit of Chinese Patent Application No. 202410772586.7, filed Jun. 14, 2024, and all the benefits accruing therefrom under 35 U.S.C. § 119, the contents of which in their entirety are herein incorporated by reference.

BACKGROUND

This application relates to a field of heat exchange equipment, and specifically relates to a fluid distributor and a heat exchanger.

SUMMARY

This application provides a fluid distributor and a heat exchanger to resolve or alleviate some of the problems in the related art.

This application provides a fluid distributor including:

• • a first plate-shaped member in which an inlet flow passage is formed;
  • a second plate-shaped member in which a first outlet flow passage and a second outlet flow passage spaced apart in a height direction are formed; and
  • a flow guide frame sealingly fixed between the first plate-shaped member and the second plate-shaped member, having a first flow guide space and a second flow guide space partitioned inside, and configured to guide a part of a fluid flowing in from the inlet flow passage to flow out from the first outlet flow passage through the first flow guide space, and guide the other part of the fluid flowing in from the inlet flow passage to flow out from the second outlet flow passage through the second flow guide space, in which
  • the flow guide frame includes a flow equalizing plate adjacent to the inlet flow passage and located below the inlet flow passage in the height direction, and the flow equalizing plate includes a flow equalizing plate bottom portion which is located below the inlet flow passage, and flow equalizing plate extension portions which extend upward from the flow equalizing plate bottom portion to two sides of the flow equalizing plate bottom portion while being inclined in the height direction to distribute the fluid flowing in from the inlet flow passage to the two sides of the flow equalizing plate bottom portion and guide the distributed fluids to the first flow guide space and the second flow guide space respectively.

In one or more embodiments, the flow equalizing plate is a V-shaped plate or an arc-shaped plate.

In one or more embodiments, lengths of the flow equalizing plate extension portions on the two sides of the flow equalizing plate bottom portion are equal.

In one or more embodiments, the flow equalizing plate is the V-shaped plate, and inclination angles with respect to the height direction of the flow equalizing plate extension portions on the two sides of the flow equalizing plate bottom portion are the same.

In one or more embodiments, the flow guide frame further includes:

• • a first side edge and a second side edge opposite to each other;
  • a top edge and a bottom edge connecting the first side edge and the second side edge, the bottom edge being the flow equalizing plate; and
  • a flow guide plate fixed in the flow guide frame, and including:
  • a first slat having two ends respectively spaced apart from the first side edge and the second side edge by a predetermined distance;
  • a second slat located between the first slat and the top edge, and having a first end fixed to the first side edge and a second end spaced apart from the second side edge by a predetermined distance; and
  • a third slat having two ends respectively connected to the second end of the second slat and an end of the first slat away from the first side edge, and
  • the inlet flow passage, the first slat, the first outlet flow passage, the second slat, and the second outlet flow passage are arranged in sequence from bottom to top in the height direction.

In one or more embodiments, the flow guide frame further includes:

• • a first side edge and a second side edge opposite to each other;
  • a top edge and a bottom edge connecting the first side edge and the second side edge, the bottom edge being the flow equalizing plate; and
  • a flow guide plate fixed in the flow guide frame, and including:
  • a first slat having two ends respectively spaced apart from the first side edge and the second side edge by a predetermined distance;
  • a second slat located between the first slat and the top edge, and having two ends respectively spaced apart from the first side edge and the second side edge by a predetermined distance;
  • a third slat having two ends respectively connected to an end of the second slat close to the second side edge and an end of the first slat close to the second side edge;
  • a fourth slat having two ends respectively connected to an end of the second slat close to the first side edge and the top edge;
  • the inlet flow passage, the first slat, the first outlet flow passage, the second slat, and the second outlet flow passage are arranged in sequence from bottom to top in the height direction.

In one or more embodiments, in the height direction, the inlet flow passage is disposed between the first outlet flow passage and the second outlet flow passage, and the first outlet flow passage is located above the second outlet flow passage,

• • the flow guide frame further includes:
  • a first side edge and a second side edge opposite to each other;
  • a top edge and a bottom edge connecting the first side edge and the second side edge; and
  • a flow guide plate fixed in the flow guide frame, and including:
  • a fifth slat disposed between the inlet flow passage and the first outlet flow passage, having an end fixed to the second side edge and the other end spaced apart from the first side edge by a predetermined distance, and having a shape that maintains a fixed distance from the flow equalizing plate in the height direction, and
  • an end of the flow equalizing plate close to the second side edge is spaced apart from the second side edge by a predetermined distance, and an end of the flow equalizing plate close to the first side edge is fixed to the first side edge, or extends and is fixed to the top edge and is spaced apart from the other end of the fifth slat by a predetermined distance.

In one or more embodiments, the flow guide frame further includes:

• • a first side edge and a second side edge opposite to each other;
  • a top edge and a bottom edge connecting the first side edge and the second side edge; and
  • a flow guide plate fixed in the flow guide frame, and including:
  • a sixth slat located between the first outlet flow passage and the second outlet flow passage, and having a first end fixed to the first side edge and a second end spaced apart from the second side edge by a predetermined distance; and
  • a seventh slat having two ends respectively connected to the second end of the sixth slat and an end of the flow equalizing plate close to the second side edge, and
  • the inlet flow passage, the flow equalizing plate, the first outlet flow passage, the sixth slat, and the second outlet flow passage are arranged in sequence from top to bottom in the height direction.

Another aspect of this application provides a heat exchanger including:

• • a heat exchange tube group having a plurality of refrigerant flow passages spaced apart in a height direction;
  • a plurality of fins disposed corresponding to the heat exchange tube group;
  • a first refrigerant distributor communicating with outlets of the plurality of refrigerant flow passages; and
  • the above fluid distributor, the first outlet flow passage and the second outlet flow passage of the fluid distributor respectively communicating with inlets of two refrigerant flow passages adjacent in the height direction.

In one or more embodiments, the heat exchanger further includes:

• • a distributor body having a body inlet and a plurality of body outlets separately communicating with the inlet flow passage of the fluid distributor through a pipeline.

In one or more embodiments, the fins are arranged along a direction perpendicular to an extension direction of the heat exchange tube group.

In one or more embodiments, the refrigerant flow passage is an S-shaped flow passage or a linear flow passage.

Since the flow equalizing plate extension portions obliquely extend upward, a fluid flowing into the flow equalizing plate first enters the flow equalizing plate bottom portion, and then overflows upward along the flow equalizing plate extension portions when a liquid level is sufficiently accumulated, which can resolve nonuniform flow distribution caused by a direct influence of the gravity on the fluid, and improve uniformity of the refrigerant distribution. In addition, the fluid flowing out of the inlet flow passage first enters and accumulates at the flow equalizing plate bottom portion which is at a low position. Even if the fluid distributor is tilted at a small angle, the fluid accumulated at the flow equalizing plate bottom portion can still be uniformly distributed to the two sides, which not only ensures the uniformity of the refrigerant distribution, but also improves a fault tolerance of the fluid distributor

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a schematic diagram of a structure of a fluid distributor in one or more embodiments of this application.

FIG. 2 is a schematic diagram of an exploded structure of the fluid distributor in one or more embodiments of this application. (a flow guide plate in a flow guide frame is not shown)

FIG. 3 is a schematic diagram of a position distribution of the flow guide frame relative to an inlet flow passage, a first outlet flow passage, and a second outlet flow passage in one or more embodiments of this application.

FIG. 4 is a schematic diagram of a position distribution of a flow guide frame relative to an inlet flow passage, a first outlet flow passage, and a second outlet flow passage in one or more embodiments of this application.

FIG. 5 is a schematic diagram of a position distribution of a flow guide frame relative to an inlet flow passage, a first outlet flow passage, and a second outlet flow passage in one or more embodiments of this application.

FIG. 6 is a schematic diagram of a position distribution of a flow guide frame relative to an inlet flow passage, a first outlet flow passage, and a second outlet flow passage in one or more embodiments of this application.

FIG. 7 is a schematic diagram of a main structure of an inserted fin type microchannel heat exchanger in one or more embodiments of this application.

FIG. 8 is a schematic diagram of a three-dimensional structure of the inserted fin type microchannel heat exchanger in one or more embodiments of this application.

Reference numerals: first plate-shaped member 1, inlet flow passage 11, second plate-shaped member 2, first outlet flow passage 21, second outlet flow passage 22, flow guide frame 3, first flow guide space 31, second flow guide space 32, flow equalizing plate 33, flow equalizing plate bottom portion 331, flow equalizing plate extension portion 332, first side edge 34, second side edge 35, top edge 36, bottom edge 37, flow guide plate 38, first slat 381, second slat 382, second slat 3821, third slat 383, fourth slat 384, fifth slat 385, sixth slat 386, seventh slat 387, heat exchange tube group 4, refrigerant flow passage 4A, refrigerant outlet 41, refrigerant inlet 42, fin 5, first refrigerant distributor 6, fluid distributor 7, distributor body 8, body inlet 81, body outlet 82, pipeline 83.

DETAILED DESCRIPTION OF THE DISCLOSURE

The technical solutions in embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in some embodiments of this application, and obviously, the described embodiments are merely a part of some embodiments of this application, and are not all embodiments. Based on some embodiments in this application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of this application.

As shown in FIGS. 1, 2, and 3, this application provides a fluid distributor which is implemented by a combination of a first plate-shaped member 1, a second plate-shaped member 2, and a flow guide frame 3. An inlet flow passage 11 is formed in or connected to the first plate-shaped member 1. A first outlet flow passage 21 and a second outlet flow passage 22 spaced apart in a height direction (taking the height direction when the fluid distributor is installed on a heat exchanger, that is, a gravity direction as a reference, and the height direction is indicated by a Z mark in FIG. 1) are formed in or connected to the second plate-shaped member 2. The flow guide frame 3 is sealed and fixed between the first plate-shaped member 1 and the second plate-shaped member 2, a first flow guide space 31 and a second flow guide space 32 are partitioned in the flow guide frame 3, a part of a fluid flowing in from the inlet flow passage 11 is guided to flow out from the first outlet flow passage 21 through the first flow guide space 31, and the other part of the fluid flowing in from the inlet flow passage 11 is guided to flow out from the second outlet flow passage 22 through the second flow guide space 32.

For the convenience of illustration, only an outer frame structure of the flow guide frame 3 is shown in FIGS. 1 and 2, and structures of the flow guide frame 3 in one or more embodiments are shown with reference to FIGS. 3 to 6.

Referring to FIG. 3, the flow guide frame 3 includes a flow equalizing plate 33 adjacent to the inlet flow passage 11 and located below the inlet flow passage 11 in the height direction, the flow equalizing plate 33 includes a flow equalizing plate bottom portion 331 and flow equalizing plate extension portions 332. The flow equalizing plate bottom portion 331 is located below the inlet flow passage 11. The flow equalizing plate extension portions 332 extend upward from the flow equalizing plate bottom portion 331 to two sides of the flow equalizing plate bottom portion 331 while being inclined in the height direction to distribute the fluid flowing in from the inlet flow passage 11 to the two sides of the flow equalizing plate bottom portion 331 and guide the distributed fluids to the first flow guide space 31 and the second flow guide space 32 respectively.

In some embodiments, since the flow equalizing plate extension portions 332 obliquely extend upward, the fluid flowing in from the inlet flow passage 11 flows from the flow equalizing plate bottom portion 331 to the two sides along the flow equalizing plate extension portions 332 to raise a liquid level, so that it can be prevented that a distribution of a fluid flowing into the fluid distributor from the inlet flow passage 11 becomes nonuniform because of a direct influence of the gravity, thereby improving the uniformity of the fluid (refrigerant) distribution. In addition, the fluid flowing out of the inlet flow passage 11 first enters and accumulates at the flow equalizing plate bottom portion 331 which is at a low position. Even if the fluid distributor is tilted at a small angle, the fluid accumulated at the flow equalizing plate bottom portion 331 can still be uniformly distributed to the two sides, which not only ensures the uniformity of the refrigerant distribution, but also improves a fault tolerance of the fluid distributor.

Specifically, as shown in FIG. 3, the flow guide frame 3 includes: a first side edge 34 and a second side edge 35 opposite to each other, a top edge 36 and a bottom edge 37 connecting the first side edge 34 and the second side edge 35, and a flow guide plate 38. In some embodiments, the bottom edge 37 is the flow equalizing plate 33. The flow guide plate 38 is fixed in the flow guide frame 3 and includes: a first slat 381, a second slat 382, and a third slat 383. The first slat 381 corresponds to the inlet flow passage 11 and is disposed above the inlet flow passage 11 in the height direction, and two ends of the first slat 381 are respectively spaced apart from the first side edge 34 and the second side edge 35 by a predetermined distance. The second slat 382 is parallel to the first slat 381 and is located above the first slat 381 in the height direction, and a first end (left end in the drawing) of the second slat 382 is fixed to the first side edge 34, and a second end (right end in the drawing) of the second slat 382 is spaced apart from the second side edge 35 by a predetermined distance. Two ends of the third slat 383 are respectively connected to the second end (right end in the drawing) of the second slat 382 and the end (right end in the drawing) of the first slat 381 away from the first side edge 34. In this way, the first slat 381, the second slat 382, a part of the first side edge 34, and the third slat 383 are enclosed together to form the first flow guide space 31. The second slat 382, a part of the first side edge 34, a part of the second side edge 35, and the top edge 36 are enclosed together to form the second flow guide space 32.

As shown in FIG. 3, when viewed from the front, the inlet flow passage 11, the first slat 381, the first outlet flow passage 21, the second slat 382, and the second outlet flow passage 22 are arranged in sequence from bottom to top in the height direction (Z direction shown in the drawing).

In some embodiments, the inlet flow passage 11 is located at a bottom portion of the first plate-shaped member 1. After a refrigerant enters the flow equalizing plate bottom portion 331 from the inlet flow passage 11, the refrigerant flows into the first flow guide space 31 through a gap between the first slat 381 and the first side edge 34 along the flow equalizing plate extension portion 332, and flows into the second flow guide space 32 through a gap between the first slat 381 and the second side edge 35, that is, the refrigerant flows upward into the corresponding flow guide space, so that an influence of the gravity on a fluid flow velocity is resolved, which is conducive to improving the uniformity of the refrigerant distribution. The refrigerants entering the first flow guide space 31 and the second flow guide space 32 eventually flow out from the first outlet flow passage 21 and the second outlet flow passage 22 respectively.

In some embodiments, the flow equalizing plate 33 is a V-shaped plate or an arc-shaped plate. The V-shaped or arc-shaped plate can lift and uniform the fluid from the inlet flow passage 11, prevent the fluid entering the flow guide frame 3 from being nonuniformly distributed due to the gravity, and ensure the uniformity of the refrigerant distribution. Furthermore, when the flow equalizing plate 33 is a V-shaped plate, and the flow equalizing plate extension portions 332 on the two sides of the flow equalizing plate bottom portion 331 have the same inclination angle with respect to the height direction, flow velocities of the fluids flowing to the two sides of the flow equalizing plate bottom portion 331 after entering the flow guide frame 3 can be ensured as substantially the same, and nonuniform fluid distribution due to different inclination angles can be avoided. Furthermore, lengths of the flow equalizing plate extension portions 332 on the two sides of the flow equalizing plate bottom portion 331 are equal. Similarly, when the flow equalizing plate 33 is an arc-shaped plate (such as a circular arc or an elliptical arc), the flow equalizing plate extension portions 332 on the two sides of the flow equalizing plate bottom portion 331 have the same curvature and arc length to ensure the uniformity of the refrigerant fluid distribution.

In an optional embodiment, the flow guide frame 3 is a pentagonal frame as shown in FIG. 3, and the second plate-shaped member 2 and the first plate-shaped member 1 can be formed into the same or different shapes as the flow guide frame 3, for example, the first plate-shaped member 1 and the second plate-shaped member 2 are pentagonal frames having the same size as the flow guide frame 3. Alternatively, the first plate-shaped member 1 and the second plate-shaped member 2 are rectangular plates, and a length of the rectangular plate is not less than a maximum length of the pentagonal frame, and a width of the rectangular plate is not less than a maximum width of the pentagonal frame. This application is not limited thereto.

In some embodiments, lengths of the first slat 381, the second slat 382, and the third slat 383, the predetermined distance between the first slat 381 and the first side edge 34, the predetermined distance between the first slat 381 and the second side edge 35, a distance between the first slat 381 and the inlet flow passage 11, a distance between the first slat 381 and the flow equalizing plate 33, a distance between the first slat 381 and the first outlet flow passage 21, a distance between the second slat 382 and the first outlet flow passage 21, a distance between the second slat 382 and the second outlet flow passage 22, and the like are not specifically limited, and those skilled in the art can adjust these according to actual needs. In addition, those skilled in the art can adjust sizes of the first flow guide space 31 and the second flow guide space 32 according to actual working conditions (such as an installation angle of the fluid distributor or a heat exchange effect of a heat exchanger to which the fluid distributor is applied in a refrigeration or heating system) such that a distribution ratio of the refrigerant approaches 1:1, and some embodiments is not limited thereto. In addition, embodiments of this present application do not limit shapes of the first slat 381, the second slat 382, and the third slat 383, and the shapes may be linear to or curved shapes.

Specifically, the flow guide frame 3 includes: the first side edge 34 and the second side edge 35 opposite to each other, the top edge 36 and the bottom edge 37 connecting the first side edge 34 and the second side edge 35, and the bottom edge 37 is the flow equalizing plate 33.

The flow guide plate 38 is fixed in the flow guide frame 3 and includes the first slat 381, a second slat 3821, the third slat 383, and a fourth slat 384. The first slat 381 extends in a horizontal direction as shown in FIG. 4, and left and right ends of the first slat 381 are respectively spaced apart from the first side edge 34 and the second side edge 35 by a predetermined distance. The second slat 3821 is parallel to the first slat 381 and is located above the first slat 381 in the height direction, and left and right ends of the second slat 3821 are respectively spaced apart from the first side edge 34 and the second side edge 35 by a predetermined distance. Upper and lower ends of the third slat 383 are respectively connected to the end of the second slat 3821 close to the second side edge 35 (right end of the second slat 3821 in the drawing) and the end of the first slat 381 close to the second side edge 35 (right end of the first slat 381 in the drawing). A lower end of the fourth slat 384 is connected to the end of the second slat 3821 close to the first side edge 34 (that is, a left end of the second slat 3821), and an upper end of the fourth slat 384 is connected to the top edge 36.

In this way, the first slat 381, the second slat 3821, a part of the first side edge 34, the third slat 383, the fourth slat 384, and a part of the top edge 36 are enclosed together to form the first flow guide space 31. The second slat 3821, the fourth slat 384, a part of the top edge 36, and the second side edge 35 are enclosed together to form the second flow guide space 32.

As shown in FIG. 4, when viewed from the front, the inlet flow passage 11, the first slat 381, the first outlet flow passage 21, the second slat 3821, and the second outlet flow passage 22 are arranged in sequence from bottom to top in the height direction.

The left end of the second slat 3821 in some embodiments is fixedly connected to the top edge 36 via the fourth slat 384, so that those skilled in the art can adjust a fixed position of the left end of the second slat 3821 according to actual needs, thereby improving setting flexibility of the flow guide frame 3.

As shown in FIG. 5, one or more embodiments of this application provides a fluid distributor, where the first outlet flow passage 21 is set above the second outlet flow passage 22 in the height direction, the inlet flow passage 11 is disposed between the first outlet flow passage 21 and the second outlet flow passage 22, and the flow equalizing plate 33 is disposed between the inlet flow passage 11 and the second outlet flow passage 22.

The flow guide frame 3 has a frame body, the flow equalizing plate 33, and the flow guide plate 38 fixed in the frame body.

Specifically, the frame body includes the first side edge 34 and the second side edge 35 opposite to each other, and the top edge 36 and the bottom edge 37 connecting the first side edge 34 and the second side edge 35.

The flow guide plate 38 includes a fifth slat 385 disposed between the inlet flow passage 11 and the first outlet flow passage 21 in the height direction, a right end of the fifth slat 385 is fixed to the second side edge 35, a left end of the fifth slat 385 is spaced apart from the first side edge 34 by a predetermined distance. The fifth slat 385 is in a shape that maintains a fixed distance with the flow equalizing plate 33 in the height direction, that is, a V-shape similar to the shape of the flow equalizing plate 33 in some embodiments. In some embodiments, the fifth slat 385 may also be a circular arc shape or an elliptical arc shape similar to the flow equalizing plate 33.

One end of the flow equalizing plate 33 close to the second side edge 35 (right end in the drawing) is set at a predetermined distance from the second side edge 35, and one end of the flow equalizing plate 33 close to the first side edge 34 (left end in the drawing) is fixed to the first side edge 34, or vertically extends in the height direction to be fixed to the top edge 36 and is spaced apart from the left end of the fifth slat 385 by a predetermined distance. FIG. 5 only shows a schematic diagram in which the end of the first side edge 33 close to the flow equalizing plate 34 extends in the height direction to be fixed to the top edge 36, and a schematic diagram (not shown) in which the end of the flow equalizing plate 33 close to the first side edge 34 directly fixed to the first side edge 34 is similar to the schematic diagram shown in FIG. 5, and a description thereof is omitted. In addition, the extension in the height direction can be a vertical extension consistent with the height direction (perpendicular to the second slat 382) or a bent extension at a certain angle with respect to the height direction.

In some embodiments, when an end of the flow equalizing plate 33 close to the first side edge 34 is fixed to the top edge 36, after the refrigerant enters the flow equalizing plate bottom portion 331 from the inlet flow passage 11, the refrigerant flows along the flow equalizing plate extension portions 332 to a gap between the other end of the fifth slat 385 and the end of the flow equalizing plate 33 close to the first side edge 34, and to a gap between an end of the flow equalizing plate 33 close to the second side edge 35 and the second side edge 35 (that is, the fluid is uniformly distributed to the two sides after entering the flow equalizing plate bottom portion 331), and a part of the distributed fluid flows upward into the first flow guide space 31 and flows out from the first outlet flow passage 31, and the other part of the fluid flows downward into the second flow guide space 32 and flows out from the second outlet flow passage 32. After the fluid flows in through the inlet flow passage 11, a distribution stage overcomes an influence of the gravity on the fluid flow velocity and the nonuniform flow distribution, which is conducive to improving the uniformity of the refrigerant distribution.

Similarly, when the end of the flow equalizing plate 33 close to the first side edge 34 is directly fixed to the first side edge 34, after the refrigerant enters the flow equalizing plate bottom portion 331 from the inlet flow passage 11, the refrigerant flows along the flow equalizing plate extension portions 332 to a gap between the other end of the fifth slat 385 and the first side edge 34, and to a gap between the end of the flow equalizing plate 33 close to the second side edge 35 and the second side edge 35 (that is, the fluid is uniformly distributed to the two sides after entering the flow equalizing plate bottom portion 331). A fluid flowing process after the distribution is the same as above and a description thereof is not repeated here.

In addition, when the inlet flow passage 11 is disposed between the first outlet flow passage 21 and the second outlet flow passage 22, it is sufficient to add the fifth slat 385 to achieve the uniform distribution of the fluid, so that the structure of the flow guide frame 3 is simplified, which is conducive to cost saving. The fifth slat 385 is a V-shape similar to the flow equalizing plate 33, and the refrigerant tends to descend first and then rise on a flow path of the fifth slat 385, which is conducive to balancing the flow velocity of the fluid in the first flow guide space 31, so that the flow velocities of the fluids discharged from the first flow guide space 31 and the second flow guide space 32 are substantially the same, and the uniformity of the refrigerant distribution is ensured.

In some embodiments, the first plate-shaped member 1, the second plate-shaped member 2, and the flow guide frame 3 are formed into rectangular frames having the same shapes and sizes. Each of the rectangular frames has a regular shape, can be obtained by a simple processing, and is conducive to achieving uniform distribution of the refrigerant.

In some embodiments, a length of the fifth slat 385, a distance in the height direction between the fifth slat 385 and the inlet flow passage 11, a distance in the height direction between the fifth slat 385 and the flow equalizing plate 33, a width of the above gap, and the like are not specifically limited, and those skilled in the art can perform adjustment according to actual needs.

As shown in FIG. 6, one or more embodiments of this application provides a fluid distributor including the first plate-shaped member 1, the second plate-shaped member 2, and the flow guide frame 3 described in the above embodiments, and has the inlet flow passage 11 which is close to a top portion of the first plate-shaped member 1.

Specifically, the flow guide frame 3 includes the flow equalizing plate 33, the first side edge 34 and the second side edge 35 opposite to each other, the top edge 36 and the bottom edge 37 connecting the first side edge 34 and the second side edge 35, and the flow guide plate 38. The two ends of the flow equalizing plate 33 are respectively spaced apart from the first side edge 34 and the second side edge 35 by a predetermined distance. The flow guide plate 38 is fixed in the flow guide frame 3. The flow guide plate 38 includes a sixth slat 386 and a seventh slat 387. The sixth slat 386 is located below the flow equalizing plate 33 in the height direction, and a left end (left end in the drawing) of the sixth slat 386 is fixed to the first side edge 34, and a right end (right end in the drawing) of the sixth slat 386 is spaced apart from the second side edge 35 by a predetermined distance. A lower end of the seventh slat 387 is connected to the right end of the sixth slat 386, and an upper end of the seventh slat 387 is connected to the end (right end in the drawing) of the flow equalizing plate 33 close to the second side edge 35. As shown in FIG. 6, when viewed from the front, the inlet flow passage 11, the flow equalizing plate 33, the first outlet flow passage 21, the sixth slat 386, and the second outlet flow passage 22 are arranged in sequence from top to bottom in the height direction.

According to the above, when the inlet flow passage 11 is disposed above the first outlet flow passage 21 and the second outlet flow passage 22, it is sufficient to add the sixth slat 386 and the seventh slat 387 to achieve the uniform distribution of the fluid, so that the structure of the flow guide frame 3 is simplified, which is conducive to cost saving.

In some embodiments, lengths of the sixth slat 386 and the seventh slat 387, a distance in the height direction between the flow equalizing plate 33 and the inlet flow passage 11, a distance in the height direction between the flow equalizing plate 33 and the first outlet flow passage 21, a distance in the height direction between the sixth slat 386 and the flow equalizing plate 33, the distance between the seventh slat 387 and the second side edge 35, and the like are not limited, and those skilled in the art can perform adjustment according to actual needs. In addition, some embodiments of this application do not limit shapes of the sixth slat 386 and the seventh slat 387, and the shapes may be linear or curved shapes.

As shown in FIGS. 7 and 8, this application further provides an inserted fin type microchannel heat exchanger including a heat exchange tube group 4, a plurality of fins 5, a first refrigerant distributor 6, and fluid distributors 7. The heat exchange tube group 4 has a plurality of refrigerant flow passages 4A spaced apart in the height direction (arrows adjacent to each other in 4A in FIG. 7 indicate flow directions of the refrigerant in corresponding heat exchange tubes). The plurality of fins 5 are inserted and arranged correspondingly to the heat exchange tube group 4. The first refrigerant distributor 6 is a manifold and communicates with refrigerant outlets 41 of the plurality of refrigerant flow passages 4A. Each of the fluid distributors 7 is the fluid distributor according to any one of the one or more embodiments, and the first outlet flow passage 21 and the second outlet flow passage 22 of the fluid distributor 7 respectively communicate with refrigerant inlets 42 of the two adjacent refrigerant flow passages 4A in the height direction.

In some embodiments, by using the fluid distributor according to any of the one or more embodiments, the fluid (refrigerant) can be uniformly distributed before entering the heat exchange tube group 4, so that the nonuniform distribution of the fluid in the heat exchange tube group 4 can be prevented from affecting performance of the heat exchanger. In addition, when the heat exchange tube group 4 is installed with deviation, the heat exchanger including the above fluid distributor 7 can still maintain excellent heat exchange performance, and improve a fault tolerance of the inserted fin type microchannel heat exchanger.

It should be noted that although the present embodiment shows a case where the refrigerant inlets 42 of any two adjacent refrigerant flow passages 4A are provided with the fluid distributor 7, this application is not limited thereto, and those skilled in the art can adjust the number and distribution of the fluid distributors 7 according to actual needs.

In some embodiments, the heat exchange tube group 4 is an S-shaped heat exchange tube or includes a plurality of heat exchange tubes arranged in parallel. Correspondingly, the refrigerant flow passage is an S-shaped flow passage or a linear flow passage. In some embodiments, the heat exchange tube is, for example, a flat tube or a round tube made of copper or aluminum. In addition, in some embodiments shown in FIG. 7, the heat exchange tube group 4 includes six refrigerant flow passages 4A, but this application is not limited thereto, and the number of the refrigerant flow passages 4A can be an integer multiple of 2.

In some embodiments, the fins 5 are arranged along a direction perpendicular to an extension direction of the heat exchange tube group 4, and in other words, the heat exchanger is an inserted fin type heat exchanger. In some embodiments, the fins 5 can also be arranged between adjacent heat exchange tubes. The embodiments of this application do not limit this.

In some embodiments, the inserted fin type microchannel heat exchanger also includes a distributor body 8. The distributor body 8 has a body inlet 81 and a plurality of body outlets 82. The body inlet 81 may communicate with a pipeline outlet of an air-conditioning system (not shown), and the body outlets 82 communicate with the inlet flow passage 11 of the fluid distributor 7 through the pipeline 83. By setting one body inlet 81 and the plurality of body outlets 82 in the distributor body 8, the refrigerant enters from the body inlet 81 and then flows out uniformly from the plurality of body outlets 82, which simplifies the refrigerant distribution structure and is conducive to cost saving.

In some embodiments, the refrigerant inlets 42 of the plurality of refrigerant flow passages 4A are all located on a first side of the heat exchange tube group 4, and the refrigerant outlets 41 of the plurality of refrigerant flow passages 4A are all located on a second side of the heat exchange tube group 4. Alternatively, the refrigerant inlets 42 and the refrigerant outlets 41 of the plurality of refrigerant flow passages 4A are all located on the same side of the heat exchange tube group, thereby simplifying the arrangement of pipelines on the first refrigerant distributor 6 and the distributor body 8, and saving the cost of the heat exchanger.

In some embodiments, the first refrigerant distributor 6 includes a plurality of refrigerant inflow portions and one refrigerant outflow portion, and the plurality of refrigerant inflow portions respectively communicate with the refrigerant outlets 41 of the plurality of refrigerant flow passages, and the refrigerant outflow portion may be connected to the pipeline of the air conditioning system.

The above embodiments are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included in the protection scope of this application.