Heat exchanger and heat exchange system

Abstract

The application relates to a heat exchanger and a heat exchange system. The heat exchanger comprises a first header section, a second header section and heat exchange tubes. The first header section comprises a first header and a first tube. The first tube comprises a body section having a first cavity and a first wall. A first tube hole penetrates the first wall. The second header section comprises a second header and a second tube. A second tube hole communicates the second header section and the second tube. One end of the heat exchange tube is connected to the first header, and the other end is connected to the second header. A plurality of heat exchange tubes are arranged along the axial direction of the first header. Such a design is beneficial to improving the uniformity of heat exchange medium distribution, thereby improving the efficiency of the heat exchanger.

Description

[0001] This application claims priority to application number 202510483669.9, entitled "A Heat Exchanger and Heat Exchange System", filed on April 16, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of heat exchange technology, and more specifically to a heat exchanger and heat exchange system for a heat pump system. Background Technology

[0003] In related technologies, air conditioning heat exchange systems include compressors, evaporators, condensers, and expansion valves. The condenser in the heat exchange system includes a manifold and multiple heat exchange tubes. The multiple heat exchange tubes are arranged axially along the manifold, with the ends of the heat exchange tubes extending into the manifold. When the condenser is in operation, the gaseous heat exchange medium enters from one end of the manifold. The gaseous heat exchange medium entering the manifold enters from the inlet of the heat exchange tube and flows axially along the manifold to enter each heat exchange tube. Some of the gaseous heat exchange medium in the manifold condenses into a liquid medium, i.e., the heat exchange medium condenses into a liquid. In some applications, technicians have found that the internal heat exchange of the condenser heat exchanger is uneven, and the overall heat exchange effect of the heat exchanger is poor. How to improve the overall performance of the heat exchanger is a problem that technicians need to solve. Summary of the Invention

[0004] This application provides a heat exchanger that can improve the uniformity of heat exchange medium distribution, thereby improving the heat exchanger's heat exchange performance.

[0005] The first aspect of this application provides a heat exchanger, which includes a first manifold section and a plurality of heat exchange tubes. The heat exchanger also includes a second manifold section. The first manifold section includes a first manifold and a first tube. The first tube includes a body section with a first cavity. The body section also includes a first wall. The wall surrounding the first cavity includes the first wall. The body section has a plurality of first tube holes that penetrate the first wall and connect the first manifold and the first tube. The second manifold section includes a second manifold and a second tube. The second tube has a plurality of second tube holes that connect the second manifold section and the second tube. One end of each heat exchange tube is directly or indirectly connected to the first manifold, and the other end of each heat exchange tube is directly or indirectly connected to the second manifold. The plurality of heat exchange tubes are arranged axially along the first manifold.

[0006] According to the heat exchanger provided by the present invention, the first manifold section includes a first manifold and a first pipe, and the second manifold section includes a second manifold and a second pipe. The first pipe is connected to the first manifold, and the second pipe is connected to the second manifold. The first pipe can improve the uniformity of heat exchange medium distribution in the first manifold under the working state of the heat exchanger, and the second pipe can improve the uniformity of heat exchange medium distribution in the second manifold under the working state of the heat exchanger. Therefore, the heat exchange performance of the heat exchanger can be improved. In particular, the influence of the heat exchange tube on the flow of heat exchange medium into the first manifold can be reduced. Reducing the flow resistance of the heat exchange medium means reducing the pressure loss of the heat exchange medium during the flow process, reducing the accumulation of liquid heat exchange medium at the end of the first manifold, and reducing the risk of liquid refrigerant blocking part of the heat exchange tube. This makes the two-phase refrigerant gas-liquid mixing in the heat exchanger more uniform, and the increased heat exchange area of ​​the heat exchange tube is beneficial to improving the heat exchange performance of the heat exchanger.

[0007] A second aspect of this application provides a heat exchange system comprising a compressor, a first heat exchanger, a throttling valve, and a second heat exchanger. One port of the compressor is connected to one end of the first heat exchanger, and the other end of the first heat exchanger is connected to one port of the throttling valve. The other port of the throttling valve is connected to one end of the second heat exchanger, and the other end of the second heat exchanger is connected to another port of the compressor. The first heat exchanger includes a first manifold section, a second manifold section, and a plurality of heat exchange tubes. One end of each heat exchange tube is directly or indirectly connected to the first manifold section, and the other end of each heat exchange tube is directly or indirectly connected to the second manifold section. The first manifold section includes a first header and a first tube. The first tube includes a body section having a first cavity and a first wall. The wall surrounding the first cavity includes the first wall. The body section has a plurality of first tube holes penetrating the first wall. When the first heat exchanger operates as a condenser, the heat exchange medium flows from the first tube to the outside and flows through the first header to the heat exchange tube.

[0008] According to the heat exchange system provided in this application, when the heat exchanger is working as a condenser in the heat exchange system, a first tube is added inside the gas phase manifold. The heat exchange medium flows out from the first tube and then flows into the heat exchange tube after the first manifold. Therefore, the influence of the heat exchange tube on the flow of the heat exchange medium into the first manifold can be reduced. Reducing the flow resistance of the heat exchange medium means that the pressure loss of the heat exchange medium during the flow process can be reduced, the accumulation of liquid heat exchange medium at the end of the first manifold is reduced, and the risk of liquid refrigerant blocking part of the heat exchange tube is reduced. This makes the two-phase refrigerant gas-liquid mixing in the heat exchanger more uniform, increases the heat exchange area of ​​the heat exchange tube, and improves the heat exchange performance of the heat exchanger, which is beneficial to improving the heat exchange performance of the heat exchange system.

[0009] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A schematic diagram of one embodiment of the heat exchanger provided in this application; Figure 2 A cross-sectional schematic diagram of another embodiment of the heat exchanger provided in this application; Figure 3 A cross-sectional schematic diagram of yet another embodiment of the heat exchanger provided in this application; Figure 4 A schematic diagram of one embodiment of the first tube provided in this application; Figure 5 for Figure 3 A schematic diagram of the cross-section of the heat exchanger is provided. Figure 6 A cross-sectional schematic diagram of another embodiment of the heat exchanger provided in this application; Figure 7 A schematic diagram of another embodiment of the first tube provided in this application; Figure 8 for Figure 6 A schematic diagram of the cross-section of the heat exchanger is provided; Figure 9 A cross-sectional schematic diagram of yet another embodiment of the heat exchanger provided in this application; Figure 10 A schematic diagram of yet another embodiment of the first tube provided in this application; Figure 11 for Figure 9 A schematic diagram of the cross-section of the heat exchanger is provided; Figure 12 This is a cross-sectional schematic diagram of yet another embodiment of the heat exchanger provided in this application. Figure 13 A schematic diagram of yet another embodiment of the first tube provided in this application; Figure 14 for Figure 12 A schematic diagram of the cross-section of the heat exchanger is provided; Figure 15A schematic diagram of yet another embodiment of the first tube provided in this application; Figure 16 A schematic diagram of yet another embodiment of the first tube provided in this application; Figure 17 A schematic diagram of yet another embodiment of the first tube provided in this application; Figure 18 A schematic diagram of yet another embodiment of the first tube provided in this application; Figure 19 A schematic diagram of yet another embodiment of the heat exchanger provided in this application; Figure 20 for Figure 19 The diagram shows a cross-sectional view of the heat exchanger. Figure 21 A schematic diagram of yet another embodiment of the heat exchanger provided in this application; Figure 22 This is a schematic diagram showing the flow direction of the heat exchange medium when the heat exchanger in the heat exchange system provided in the embodiments of this application is used as a condenser; Figure 23 This is a schematic diagram showing the flow direction of the heat exchange medium when the heat exchanger is used as a condenser in the heat exchange system provided in the embodiments of this application.

[0012] Figure label: 100-Heat Exchanger 10-First Central Management Department; 1-First manifold; 11-Inner cavity; 20-Second Collection and Management Department; 2-Second manifold; 3-Heat exchange tubes; 31-First straight section; 32-Second straight section; 33-bending section; 4-First tube; 41-Ontology part; 411 - First cavity; 412 - First borehole; 412a - First hole; 412b - Second hole; 412c - Third hole; 412d - Fourth hole; 413 - First paragraph; 414 - Second paragraph; 415 - Third paragraph; 416 - Fourth paragraph; 417 - First end face; 418 - Second end face; 419 - First Wall; 42-First connecting part; 421 - Second cavity; 43-Second connecting part; 431 - Fourth cavity; 5-Second tube; 51-Second borehole; 200 - Throttling valve; 300 - First heat exchanger; 400 - Compressor; 500 - Second heat exchanger. Detailed Implementation

[0013] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0014] like Figure 1 As shown, this application embodiment provides a heat exchanger 100, which includes a first manifold section 10 and a plurality of heat exchange tubes 3. The first manifold section 10 includes a first manifold 1 and a first tube 4. The first tube 4 includes a plurality of first tube holes 412, which connect the first manifold 1 and the first tube 4. The heat exchanger 100 also includes a second manifold section 20, which includes a second manifold 2 and a second tube 5. The second tube 5 includes a plurality of second tube holes 51, which connect the second manifold 2 and the second tube 5. One end of each heat exchange tube 3 is directly or indirectly connected to the first manifold 1, and the other end is directly or indirectly connected to the second manifold 2. The plurality of heat exchange tubes 3 are arranged along the axial direction of the first manifold 1. The first tube 4 includes a body section 41 and a first connecting section 42. The body section 41 has a first wall 419 and a first cavity 411, and the wall surrounding the first cavity 411 includes the first wall 419. The main body 41 has a plurality of first pipe holes 412, which penetrate the first wall 419. The first connecting part 42 has a second cavity 421, which communicates with the first cavity 411. The first manifold 1 has an inner cavity 11, and the second cavity 421 communicates with the inner cavity 11. When the heat exchanger 100 operates as a condenser, the heat exchange medium flows from the second cavity 421 to the first cavity 411, and from the first cavity 411 to the inner cavity 11. One of the planes parallel to the axial direction of the first manifold 1 is defined as the first plane. In the axial direction perpendicular to the first manifold 1, the first manifold 1 has a first projection on the first plane, and the first pipe 4 has a second projection on the first plane. The length of the overlapping part of the first projection and the second projection in the axial direction of the first manifold 1 is L1, and the length of the first manifold 1 is L2, where 0.5≤L1 / L2≤1.

[0015] Typically, the heat exchange tube 3 is connected to the first manifold 10 via a plug-in connection, with a portion of the heat exchange tube 3 extending into the interior of the first manifold 1, specifically within the inner cavity 11. When the gaseous heat exchange medium enters the inner cavity 11 of the first manifold 1 and flows axially along the first manifold 1, the portion of the heat exchange tube 3 extending into the inner cavity 11 obstructs the flow of the gaseous heat exchange medium, resulting in pressure loss. The pressure loss increases with distance from the inlet of the inner cavity 11, leading to a decrease in pressure. Therefore, the pressure on the side of the heat exchange tube 3 facing the first manifold 1 that is farther from the inlet of the inner cavity 11 is lower than the pressure on the side of the heat exchange tube 3 furthest from the first manifold 1. When the gaseous heat exchange medium condenses into a liquid and enters the heat exchange tube 3, the pressure is higher on the side of the heat exchange tube 3 away from the first manifold 1. Therefore, the flow resistance of the liquid heat exchange medium in the heat exchange tube 3 increases. When the flow resistance increases to a certain range, the liquid heat exchange medium cannot flow out from the side of the heat exchange tube 3 away from the first manifold 1, causing the liquid heat exchange medium to remain in the heat exchange tube 3, resulting in a liquid seal. When a liquid seal occurs in the heat exchanger 100, it affects the flow of the heat exchange medium in the heat exchanger 100, preventing the effective utilization of the heat exchange area and affecting the efficiency of the heat exchanger 100.

[0016] Technicians discovered that when the L1 / L2 ratio is less than 0.5, the pressure loss increases with the friction loss of the heat exchange medium. Therefore, even when the heat exchange medium flows in from the front end of the first manifold 1, there is still a risk of liquid refrigerant accumulating at the rear end. Conversely, if the L1 / L2 ratio is greater than 1, it increases the friction loss of the heat exchange medium within the first pipe 4, meaning more liquid refrigerant may be generated inside. With the continuous delivery of gaseous refrigerant during distribution, more liquid refrigerant is pushed towards the rear end of the first manifold 1, potentially leading to further accumulation of liquid refrigerant there. Therefore, an optimal L1 / L2 ratio is between 0.5 and 1.

[0017] The solution provided in this application embodiment allows the gaseous heat exchange medium to flow and be distributed along the extension direction of the first pipe 4 by setting the first pipe 4. Since the heat exchange pipe 3 and the first pipe 4 are spaced apart by a predetermined distance, the heat exchange pipe 3 will not obstruct the flow of the heat exchange medium in the first pipe 4. This reduces the pressure loss of the heat exchange medium during its flow inside the first manifold 1, reduces the possibility that the heat exchange medium will become liquid and remain at the end of the first manifold 1 after heat exchange with the air, and reduces the accumulation of liquid heat exchange medium at the end of the first manifold 1. This facilitates the passage of the heat exchange medium through more heat exchange pipes 3, thereby improving the uniformity of heat exchange medium distribution, making the two-phase refrigerant gas-liquid mixture in the heat exchanger more uniform, increasing the heat exchange area of ​​the heat exchanger, and thus improving the heat exchange efficiency of the heat exchanger 100.

[0018] The second manifold section 20 includes a second manifold 2 and a second pipe 5. The second pipe 5 has a plurality of second pipe holes 51, which connect the second manifold section 2 and the second pipe 5. The heat exchange medium flowing out from the heat exchange tube 3 flows to the second manifold 2, and from the second manifold 2 to the second pipe 5, and then flows out through the second pipe 5.

[0019] This design allows the manifolds at both ends of the heat exchanger to include a first pipe 4 and a second pipe 5, respectively. When the heat exchanger is used as a condenser and evaporator, a sleeve is installed at the inlet end, which helps improve the uniformity of heat exchange medium distribution and increases the efficiency of the heat exchanger. Figure 2 As shown, in some embodiments, the diameter of the first orifice 412 is d, the equivalent diameter of the first manifold 1 is D, and the number of first orifices 412 is N, where N is a natural number and not 0, satisfying: 0.5 ≤ π / (π +Nπ ) <1, The equivalent diameter refers to the diameter of a circular pipe with the same hydraulic radius. In the effective cross-section of the total flow, the contact length between the fluid and the solid wall is called the wetted perimeter, and the ratio of the effective cross-sectional area A of the total flow to the wetted perimeter is defined as the hydraulic radius. Technicians have found that the length of the body section 41 is related to the number of first pipe holes 412, the diameter of the first pipe holes 412, and the equivalent diameter of the first manifold 1. When the length of the body section 41 is too short, the distribution effect is poor, and the pressure loss at the inlet position far from the first manifold 1 is large, causing the inlet end of the heat exchange tube 3 at the corresponding position to be blocked by the liquid heat exchange medium. This prevents the heat exchange medium from passing through the heat exchange tube 3 at that position, affecting the heat exchange efficiency of the heat exchanger 100. When the length of the body section 41 is too long, the flow resistance is large, affecting the working efficiency of the heat exchanger 100. The flow resistance of the heat exchange medium in the first tube 4 is relatively small. When the flow rate of the heat exchange medium in the first tube 4 is fast, it is easy for more of the heat exchange medium to flow to the heat exchange tube 3 that is far away from the inlet of the first manifold 1, resulting in uneven distribution of the heat exchange medium inside the heat exchanger 100, which in turn affects the heat exchange efficiency of the heat exchanger 100.

[0020] In some embodiments, the equivalent diameter of the first connecting portion 42 is Y, and the equivalent diameter of the body portion 41 is X. When Y=X, 0.5≤L1 / L2≤0.6.

[0021] In some embodiments, the equivalent diameter of the first connecting portion 42 is Y, and the equivalent diameter of the body portion 41 is X. When 0.8≤Y / X≤1, 0.6≤L1 / L2≤0.7.

[0022] In some embodiments, the equivalent diameter of the first connecting portion 42 is Y, and the equivalent diameter of the body portion 41 is X. When 0.5≤Y / X≤0.8, 0.7≤L1 / L2≤0.8.

[0023] In some embodiments, the equivalent diameter of the first connecting portion 42 is Y, and the equivalent diameter of the body portion 41 is X. When Y / X≤0.5, 0.8≤L1 / L2≤0.9.

[0024] The equivalent diameter of the first connecting part 42 is usually smaller than the equivalent diameter of the body part 41. When the difference between the equivalent diameter of the first connecting part 42 and the equivalent diameter of the body part 41 is greater, the length of the part of the body part 41 located in the inner cavity 11 is longer. That is, the smaller the equivalent diameter of the first connecting part 42, the longer the length of the body part 41.

[0025] The smaller the equivalent diameter of the first connecting part 42, the greater the difference between its equivalent diameter and that of the main body 41. When the gaseous heat exchange medium enters the main body 41 from the first connecting part 42, the change in flow area affects the flow velocity of the heat exchange medium in the main body 41, thus affecting the uniformity of distribution. When the equivalent diameter of the first connecting part 42 is closer to that of the main body 41, the impact on the flow velocity of the heat exchange medium in the main body 41 is smaller, the flow of the heat exchange medium is faster, and the impact of pressure loss on the heat exchange medium is smaller. Therefore, the length of the main body 41 can be shortened. Conversely, the greater the difference between the equivalent diameter of the first connecting part 42 and that of the main body 41, the greater the impact on the flow velocity of the heat exchange medium in the main body 41. The slower the flow velocity of the heat exchange medium, the greater the impact of pressure loss on the heat exchange medium. Therefore, the pressure loss of the heat exchange medium can be reduced by increasing the length of the main body 41, thereby improving the overall operating efficiency of the heat exchanger 100.

[0026] In some embodiments, the plurality of first pipe holes 412 may include a first hole 412a. A first plane is defined as any plane parallel to the length direction of the first pipe 4 and perpendicular to the length direction of the heat exchange pipe 3. The first hole 412a has a projection on the first plane, and the heat exchange pipe 3 also has a projection on the first plane. The projection of the first hole 412a coincides with the projection of the heat exchange pipe 3, or, along the axial direction of the first manifold 1, the projection of the first hole 412a is located between the projections of two adjacent heat exchange pipes 3. That is, as shown... Figure 3 , Figure 4 , Figure 5 As shown, the position of the first hole 412a can be directly opposite the heat exchange tube 3, or, as... Figure 6 , Figure 7 and Figure 8 As shown, it is located between adjacent heat exchange tubes 3.

[0027] The location of the first hole 412a can be set according to the flow rate of the heat exchange medium. When the flow rate of the heat exchange medium is slow, the first hole 412a can be located directly opposite the heat exchange tube 3. When the flow rate of the heat exchange medium is fast, the first hole 412a can be located between adjacent heat exchange tubes 3, thereby reducing the possibility of uneven distribution caused by excessively fast flow rate of the heat exchange medium.

[0028] like Figure 9 , Figure 10 and Figure 11 As shown, in some embodiments, the first tube 4 includes a second hole 412b and a third hole 412c, which are arranged opposite to each other in the width direction of the heat exchange tube 3.

[0029] By setting the second hole 412b and the third hole 412c, the heat exchange medium can flow out from different sides of the first tube 4, which helps to improve the distribution uniformity of the first tube 4 and allows the heat exchange medium to flow into different heat exchange tubes 3 relatively evenly, thereby improving the heat exchange efficiency of the heat exchanger 100.

[0030] Along the arrangement direction of the heat exchange tubes 3, the second hole 412b and the third hole 412c can be located between adjacent heat exchange tubes 3 or aligned with the heat exchange tubes 3.

[0031] like Figure 11 As shown, in some embodiments, in the width direction of the heat exchange tube 3, the distance between the second hole 412b and the axis of the first tube 4 is D1, and the distance between the third hole 412c and the axis of the first tube 4 is D2, and 2D1=2D2=X. The second hole 412b and the third hole 412c can be symmetrically arranged in the first tube 4.

[0032] This design helps to improve the uniformity of heat exchange medium distribution, making it more in line with actual usage needs.

[0033] When the cross-section of the body part 41 is circular, the second hole 412b and the third hole 412c can be located on opposite sides of the body part 41 along the diameter direction of the body part 41 perpendicular to the axis of the heat exchange tube 3.

[0034] This design helps to further improve the uniformity of heat exchange medium distribution.

[0035] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, in some embodiments, when Y=X and 0.5≤L1 / L2≤0.6, a first hole 412a can be formed in the body portion 41, or a second hole 412b and a third hole 412c can be formed in the body portion 41. The first hole 412a can be located on the side of the body portion 41 facing the heat exchange tube 3, or it can be located on the side of the body portion 41 away from the heat exchange tube 3.

[0036] In some embodiments, when 0.8 ≤ Y / X ≤ 1 and 0.6 ≤ L1 / L2 ≤ 0.7, it can be done as follows: Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a first hole 412a is opened in the body part 41, or it can be as follows: Figure 9 , Figure 10 and Figure 11 As shown, a second hole 412b and a third hole 412c are provided in the body portion 41. The first hole 412a can be located on the side of the body portion 41 facing the heat exchange tube 3. The second hole 412b and the third hole 412c can be located between adjacent heat exchange tubes 3.

[0037] In some embodiments, when 0.5 ≤ Y / X ≤ 0.8 and 0.7 ≤ L1 / L2 ≤ 0.8, it can be done as follows: Figure 3 , Figure 4 and Figure 5 As shown, a first hole 412a is opened in the body part 41, or it can be as follows: Figure 9 , Figure 10 and Figure 11 As shown, a second hole 412b and a third hole 412c are provided in the body part 41. The first hole 412a is located on the side of the body part 41 facing the heat exchange tube 3.

[0038] like Figure 12 , Figure 13 and Figure 14 As shown, in some embodiments, when Y / X≤0.5 and 0.8≤L1 / L2≤0.9, a first hole 412a, a second hole 412b, and a third hole 412c can be simultaneously formed in the body portion 41. The first hole 412a can be located on the side of the body portion 41 away from the heat exchange tube 3.

[0039] like Figure 15 As shown, in some embodiments, the number of heat exchange tubes 3 is m, the equivalent diameter of the body part 41 is X, and the diameter of at least one first tube hole 412 is d, and d satisfies the following relationship: d ≤ .

[0040] The diameter of the first tube hole 412 can be calculated based on the equivalent diameter of the main body 41 and the number of heat exchange tubes 3, so that the heat exchange medium can flow more evenly to each heat exchange tube 3.

[0041] In some embodiments, the body portion 41 has N first pipe holes 412, which are arranged axially at intervals in the first manifold 1. When N is an even number, the 0.5Nth first pipe hole 412 or the 0.5N+1th first pipe hole 412 is a reference hole, and the diameter of the reference hole is d, where d = N is not zero. Along the axial direction of the first manifold 1, the body portion 41 has a first end face 417 and a second end face 418. The first end face 417 is closer to the first connecting portion 42 than the second end face 418. The equivalent diameter of at least one first pipe hole 412 between the reference hole and the first end face 417 is d1, and satisfies 0.9d ≤d1≤1.1d Along the axial direction of the first manifold 1, the distance between at least one first pipe hole 412 and the first end face 417 is a1, and the distance between the reference hole and the first end face 417 is a2.

[0042] like Figure 16 As shown, in some embodiments, the body portion 41 has N first pipe holes 412, and the plurality of first pipe holes 412 are arranged at intervals along the axial direction of the first manifold 1. When N is an odd number, the 0.5N+0.5th first pipe hole 412 is a reference hole, the diameter of which is d, and d = The equivalent diameter of at least one first borehole 412 between the reference hole and the first end face 417 is d1, where d1 satisfies 0.9d ≤d1≤1.1d In the axial direction of the first manifold 1, the distance between at least one first pipe hole 412 and the first end face 417 is a1, and the distance between the reference hole and the first end face 417 is a2.

[0043] like Figure 17 As shown, in some embodiments, the cross-sectional area of ​​each first hole 412 gradually increases along the direction away from the first connection portion 42.

[0044] like Figure 18 As shown, in some embodiments, along the axial direction of the first manifold 1, the body portion 41 is divided into four parts of equal length. The body portion 41 includes a first part, a second part, a third part, and a fourth part. The first part is a first segment 413, the second part is a second segment 414, the third part is a third segment 415, and the fourth part is a fourth segment 416. Along the axial direction of the first manifold 1, the first segment 413 is closer to the first end face 417 than the second segment 414, the second segment 414 is closer to the first end face 417 than the third segment 415, the third segment 415 is closer to the first end face 417 than the fourth segment 416, and the sum of the flow areas of the first pipe holes 412 in the fourth segment 416 is greater than the sum of the flow areas of the first pipe holes 412 in the first segment 413.

[0045] Since the fourth segment 416 is far from the first connecting part 42, the flow area of ​​the first pipe hole 412 of the fourth segment 416 can be increased to facilitate the flow of the heat exchange medium from the first pipe hole 412 of the fourth segment 416.

[0046] In some embodiments, the body portion 41 may further include a fourth hole 412d, which is located on the second end face 418. The equivalent diameter of the fourth hole 412d is Z, and 0.3Y≤Z≤Y.

[0047] When the diameter of the fourth hole 412d is too small, it is not convenient for the heat exchange medium to flow out from the end of the body part 41 away from the first connection part 42, which will affect the flow efficiency of the heat exchange medium and thus affect the heat exchange efficiency.

[0048] like Figure 19 and Figure 20 As shown, in some embodiments, the body portion 41 is connected to the first manifold 1 radially, and the body portion 41 is located outside the first manifold 1. The first pipe 4 also includes a second connecting portion 43, and the body portion 41 and the second connecting portion 43 are directly or indirectly connected. The second connecting portion 43 has a fourth cavity 431, and a first pipe hole 412 is provided in the body portion 41. The fourth cavity 431 communicates with the first pipe hole 412 and the inner cavity 11. The length L1 of the body portion 41 in the axial direction of the first manifold 1 and the length L2 of the first manifold 1 satisfy 0.65≤L1 / L2≤1.

[0049] By placing the first pipe 4 on the outside of the first manifold 1, the installation difficulty can be reduced, which is more in line with actual usage needs.

[0050] like Figure 2 As shown, in some embodiments, at least a portion of the body portion 41 is located in the inner cavity 11, and the length L1 of the portion of the body portion 41 located in the inner cavity 11 along the axial direction of the first manifold 1 and the length L2 of the first manifold 1 satisfy 0.5≤L1 / L2≤0.9.

[0051] By placing the main body 41 inside the first manifold 1, the volume occupied by the first pipe 4 can be reduced, which is more in line with actual usage requirements.

[0052] like Figure 21 As shown, in some embodiments, the heat exchange tube 3 includes a first straight section 31, a curved section and a second straight section 32. One end of the curved section is connected to the first straight section 31 and the other end is connected to the second straight section 32. The first straight section 31 is directly or indirectly connected to the first manifold 1. The angle between the axial direction of the first pipe hole 412 and the extension direction of the second straight section 32 is an acute angle.

[0053] Furthermore, such as Figure 19 and Figure 21As shown, the equivalent diameter D1 of the first tube 4 is greater than the equivalent diameter D2 of the second tube 5.

[0054] The heat exchanger 100 provided in this embodiment can be a heat exchanger 100 with bends or a heat exchanger 100 without bends, depending on the actual usage requirements. The end of the heat exchange tube 3 away from the first manifold 1 can be connected to the second manifold 2, and the outlet of the heat exchanger 100 can be located in the second manifold 2.

[0055] Based on the heat exchanger 100 involved in the above embodiments, such as Figure 22 As shown in the embodiment of this application, a heat exchange system is also provided. The heat exchange system includes a compressor 400, a first heat exchanger 300, a throttling valve 200, and a second heat exchanger 500. One port of the compressor 400 is connected to one end of the first heat exchanger 300, and the other end of the first heat exchanger 300 is connected to one port of the throttling valve 200. The other port of the throttling valve 200 is connected to one end of the second heat exchanger 500, and the other end of the second heat exchanger 500 is connected to the other port of the compressor 400. The first heat exchanger 300 includes a first manifold section 10, a second manifold section 20, and a plurality of heat exchange tubes 3. One end of each heat exchange tube 3 is directly or indirectly connected to the first manifold section 10, and the other end of each heat exchange tube 3 is directly or indirectly connected to the second manifold section 20. The first manifold section 10 includes a first... When the first heat exchanger 300 operates as a condenser, the heat exchange medium flows out from the first pipe 4 and flows to the heat exchange tube 3 after passing through the first manifold 1. The first pipe 4 includes a body part 41, which has a first cavity 411 and a first wall 419. The wall surrounding the first cavity 411 includes the first wall 419. The body part 41 has a plurality of first pipe holes 412, which penetrate the first wall 419. One of the planes parallel to the axial direction of the first manifold 1 is defined as the first plane. In the axial direction perpendicular to the first manifold 1, the first manifold 1 has a first projection on the first plane, and the first pipe has a second projection on the first plane. The length of the overlapping part of the second projection and the first projection in the axial direction of the first manifold 1 is L1, and the length of the first manifold 1 is L2, where 0.5≤L1 / L2≤1.

[0056] The first heat exchanger 300 is used as a condenser, and the second heat exchanger 500 is used as an evaporator. The first heat exchanger 300 can be any of the heat exchangers 100 involved in the above embodiments. Since the heat exchanger 100 has the above technical effects, the heat exchange system including the heat exchanger 100 also has the corresponding technical effects, which will not be elaborated here.

[0057] In some embodiments, such as Figure 22As shown, the second manifold section 20 includes a second manifold 2 and a second pipe 5. The second pipe 5 has a plurality of second pipe holes 51. The second pipe holes 51 connect the second manifold section 2 and the second pipe 5. The heat exchange medium flowing out from the heat exchange tube 3 flows to the second manifold 2 and from the second manifold 2 to the second pipe 5, and then flows out through the second pipe 5.

[0058] In some embodiments, such as Figure 23 As shown, when the first heat exchanger 300 is working as an evaporator, the heat exchange medium flows through the second pipe 5 to the second manifold 2, and then flows from the second manifold 2 to the outside through multiple heat exchange pipes 3 to the first manifold 1. The heat exchange medium flowing from the first manifold 1 to the outside flows through the first pipe 4 and then flows out.

[0059] The first heat exchanger 300 provided in this application embodiment can be used as both a condenser and an evaporator.

[0060] In some embodiments, such as Figure 22 and Figure 23 As shown, the equivalent diameter of the first tube 4 is greater than the equivalent diameter of the second tube 5.

[0061] When the heat exchanger is used as a condenser, the first tube 4 serves as the inlet tube, and the second tube 5 serves as the outlet tube. The equivalent diameter of the first tube 4 is larger than that of the second tube 5. This design reduces the flow velocity of the heat exchange medium in the first tube 4, thus minimizing pressure loss. The gaseous heat exchange medium diffuses more evenly after entering the first tube 4. The smaller equivalent diameter of the second tube 5 increases the flow velocity of the heat exchange medium, facilitating the rapid discharge of the liquid heat exchange medium. When the heat exchanger is used as an evaporator, the second tube 5 can serve as the inlet tube, and the first tube 4 as the outlet tube. Increasing the equivalent diameter of the first tube 4 increases its flow area, thereby reducing stagnation and backflow of the gaseous heat exchange medium. The relatively low flow velocity of the heat exchange medium in the first tube 4 reduces vibration and noise.

[0062] In some embodiments, the first pipe 4 includes a body portion 41 and a first connecting portion 42. The first connecting portion 42 has a second cavity 421. The first cavity 411 and the second cavity 421 are connected. The first manifold 1 has an inner cavity 11. The second cavity 421 is connected to the inner cavity 11. When the first heat exchanger 300 is working as a condenser, the heat exchange medium flows from the second cavity 421 to the first cavity 411 and from the first cavity 411 to the inner cavity 11.

[0063] This is understandable. Figure 22 and Figure 23 The structure of the first heat exchanger 300 is shown for illustrative purposes only and does not limit the implementation of the embodiments.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0068] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The above examples illustrate the principles and implementation methods of the present invention. These embodiments are merely illustrative and intended to aid in understanding the method and core concepts of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A heat exchanger, characterized in that, The heat exchanger includes a first manifold section (10) and a plurality of heat exchange tubes (3). The heat exchanger also includes a second manifold section (20). The first manifold section (10) includes a first manifold (1) and a first tube (4). The first tube (4) includes a body section (41). The body section (41) has a first cavity (411). The body section (41) also includes a first wall (419). The wall surrounding the first cavity (411) includes the first wall (419). The body section (41) has a plurality of first tube holes (412). The first tube holes (412) penetrate the first wall (419). 19), the first pipe hole (412) connects the first manifold (1) and the first pipe (4), the second manifold section (20) includes the second manifold (2) and the second pipe (5), the second pipe (5) has a plurality of second pipe holes (51), the second pipe holes (51) connect the second manifold section (2) and the second pipe (5), one end of the heat exchange tube (3) is directly or indirectly connected to the first manifold (1), the other end of the heat exchange tube (3) is directly or indirectly connected to the second manifold (2), and the plurality of heat exchange tubes (3) are arranged along the axial direction of the first manifold (1).

2. The heat exchanger according to claim 1, characterized in that, The equivalent diameter D1 of the first tube (4) is greater than the equivalent diameter D2 of the second tube (5).

3. The heat exchanger according to claim 1, characterized in that, Define one of the planes parallel to the axial direction of the first manifold (1) as the first plane. The first manifold (1) has a first projection on the first plane. The first pipe (4) has a second projection on the first plane. The length of the overlapping part of the second projection and the first projection in the axial direction of the first manifold (1) is L1. The length of the first manifold (1) is L2. Wherein, 0.5≤L1 / L2≤1.

4. The heat exchanger according to any one of claims 1 to 3, characterized in that, The diameter of the first orifice (412) is d, the equivalent diameter of the first manifold (1) is D, and the number of the first orifices (412) is N, satisfying the following condition: 0.5 ≤ π / (π +Nπ ) <1.

5. The heat exchanger according to any one of claims 1 to 3, characterized in that, The first pipe (4) further includes a first connecting part (42), the first connecting part (42) has a second cavity (421), the first cavity (411) and the second cavity (421) are connected, the second cavity (421) is connected to the inner cavity (11) of the first manifold (1), the equivalent diameter of the first connecting part (42) is Y, the equivalent diameter of the body part (41) is X, and the following conditions are satisfied: Y=X, 0.5≤L1 / L2≤0.

6.

6. The heat exchanger according to claim 5, characterized in that, The equivalent diameter of the first connecting part (42) is Y, and the equivalent diameter of the main body part (41) is X, satisfying the following conditions: 0.8≤Y / X≤1; 0.6≤L1 / L2≤0.

7.

7. The heat exchanger according to claim 5, characterized in that, The equivalent diameter of the first connecting part (42) is Y, and the equivalent diameter of the main body part (41) is X, satisfying the following conditions: 0.5≤Y / X≤0.8; 0.7≤L1 / L2≤0.

8.

8. The heat exchanger according to claim 6, characterized in that, The equivalent diameter of the first connecting part (42) is Y, and the equivalent diameter of the main body part (41) is X, satisfying the following conditions: Y / X≤0.5, 0.8≤L1 / L2≤0.

9.

9. The heat exchanger according to any one of claims 1 to 3, characterized in that, The plurality of first pipe holes (412) include a first hole (412a). A first plane is defined as any plane that is parallel to the length direction of the first pipe (4) and perpendicular to the length direction of the heat exchange pipe (3). The first hole (412a) has a projection on the first plane. The heat exchange pipe (3) has a projection on the first plane. The projection of the first hole (412a) coincides with the projection of the heat exchange pipe (3). Alternatively, in the axial direction of the first manifold (1), the projection of the first hole (412a) is located between the projections of two adjacent heat exchange pipes (3).

10. The heat exchanger according to any one of claims 1 to 3, characterized in that, The first tube hole (412) also includes a second hole (412b) and a third hole (412c), which are arranged opposite to each other in the width direction of the heat exchange tube (3).

11. The heat exchanger according to any one of claims 1 to 3, characterized in that, The first tube (4) further includes a first connecting part (42), the number of heat exchange tubes (3) is m, the equivalent diameter of the body part (41) is X, and at least one of the first tube holes (412) has a diameter of d, and satisfies the following relationship, d≤ .

12. The heat exchanger according to claim 11, characterized in that, The main body (41) has N first pipe holes (412), and the plurality of first pipe holes (412) are arranged at intervals along the axial direction of the first manifold (1). When N is even, the 0.5Nth first borehole (412) or the 0.5N+1th first borehole (412) is a reference borehole, and the diameter of the reference borehole is d= N is not zero; Along the axial direction of the first manifold (1), the first pipe (4) has a first end face (417) and a second end face (418). The first end face (417) is closer to the first connecting portion (42) than the second end face (418). The equivalent diameter of at least one of the first pipe holes (412) between the reference hole and the first end face (417) is d1, and d1 satisfies the following relationship: 0.9d ≤d1≤1.1d In the axial direction of the first manifold (1), the distance between the at least one first pipe hole (412) and the first end face (417) is a1, and the distance between the reference hole and the first end face (417) is a2.

13. The heat exchanger according to claim 12, characterized in that, The equivalent diameter of at least one of the first holes (412) between the reference hole and the second end face (418) is d2, and d2 satisfies the following relationship: 0.9 ≤d2≤1.1 .

14. The heat exchanger according to claim 11, characterized in that, The main body (41) has N first pipe holes (412), and the plurality of first pipe holes (412) are arranged at intervals along the axial direction of the first manifold (1). When N is odd, the 0.5N+0.5th first borehole (412) is a reference borehole, and the diameter of the reference borehole is d= ; Along the axial direction of the first manifold (1), the first pipe (4) has a first end face (417) and a second end face (418), the first end face being closer to the first connecting portion (42) than the second end face (418), and the equivalent diameter of at least one of the first pipe holes (412) between the reference hole and the first end face (417) is d1, where d1 satisfies the following relationship: 0.9d ≤d1≤1.1d In the axial direction of the first manifold (1), the distance between the at least one first pipe hole (412) and the first end face (417) is a1, and the distance between the reference hole and the first end face (417) is a2.

15. The heat exchanger according to claim 14, characterized in that, The equivalent diameter of at least one of the first holes (412) between the reference hole and the second end face (418) is d2, and d2 satisfies the following relationship: 0.9 ≤d2≤1.1 .

16. The heat exchanger according to claim 11, characterized in that, Along the axial direction of the first manifold (1), the first pipe (4) has a first end face (417) and a second end face (418). The first end face is closer to the first connecting portion (42) than the second end face (418). Along the axial direction of the first manifold (1), the body portion (41) is divided into four parts of equal length. The body portion (41) includes a first segment (413), a second segment (414), a third segment (415), and a fourth segment (416). In the axial direction of the first segment (413), the first segment (413) is closer to the first end face (417) than the second segment (414), the second segment (414) is closer to the first end face (417) than the third segment (415), the third segment (415) is closer to the first end face (417) than the fourth segment (416), and the sum of the flow areas of the first holes (412) of the fourth segment (416) is greater than the sum of the flow areas of the first holes (412) of the first segment (413).

17. The heat exchanger according to claim 11, characterized in that, Along the axial direction of the first manifold (1), the first pipe (4) has a first end face (417) and a second end face (418). The first end face (417) is closer to the first connecting part (42) than the second end face (418). The body part (41) also includes a fourth hole (412e), which is located on the second end face (418). The equivalent diameter of the fourth hole (412e) is Z, where 0.3Y≤Z≤Y.

18. The heat exchanger according to any one of claims 1 to 3, characterized in that, The main body (41) is connected to the first manifold (1) radially. The first pipe (4) further includes a second connecting part (43). The main body (41) and the second connecting part (43) are directly or indirectly connected. The second connecting part (43) has a fourth cavity (431). The first pipe hole (412) is disposed on the main body (41). The fourth cavity (431) communicates the first pipe hole (412) with the inner cavity (11) of the first manifold (1). The length L1 of the main body (41) along the axial direction of the first manifold (1) and the length L2 of the first manifold (1) satisfy 0.65≤L1 / L2≤1.

19. The heat exchanger according to any one of claims 1 to 3, characterized in that, At least a portion of the body part (41) is located in the inner cavity (11) of the first manifold (1), and the length L1 of the body part (41) located in the inner cavity (11) along the axial direction of the first manifold (1) and the length L2 of the first manifold (1) satisfy 0.5≤L1 / L2≤0.

9.

20. A heat exchange system, characterized in that, The heat exchange system includes a compressor (400), a first heat exchanger (300), a throttle valve (200), and a second heat exchanger (500). One port of the compressor (400) is connected to one end of the first heat exchanger (300), and the other end of the first heat exchanger (300) is connected to one port of the throttle valve (200). The other port of the throttle valve (200) is connected to one end of the second heat exchanger (500), and the other end of the second heat exchanger (500) is connected to another port of the compressor (400). The first heat exchanger (300) includes a first manifold section (10), a second manifold section (20), and a plurality of heat exchange tubes (3). One end of each heat exchange tube (3) is directly or indirectly connected to the first manifold section (10). The other end of the heat exchange tube (3) is directly or indirectly connected to the second manifold (20). The first manifold (10) includes a first manifold (1) and a first tube (4). The first tube (4) includes a body part (41). The body part (41) has a first cavity (411). The body part (41) also includes a first wall (419). The wall surrounding the first cavity (411) includes the first wall (419). The body part (41) has a plurality of first pipe holes (412). The first pipe holes (412) penetrate the first wall (419). When the first heat exchanger (300) works as a condenser, the heat exchange medium flows from the first tube (4) to the outside and flows to the heat exchange tube (3) after passing through the first manifold (1).

21. The heat exchange system according to claim 20, characterized in that, The second manifold section (20) includes a second manifold (2) and a second pipe (5). The second pipe (5) has a plurality of second pipe holes (51). The second pipe holes (51) connect the second manifold (2) and the second pipe (5). The heat exchange medium flowing out from the heat exchange tube (3) flows to the second manifold (2) and from the second manifold (2) to the second pipe (5), and then flows out through the second pipe (5).

22. The heat exchange system according to claim 21, characterized in that, When the first heat exchanger (300) is working as an evaporator, the heat exchange medium flows through the second pipe (5) to the second manifold (2), and flows from the second manifold (2) to the outside through a plurality of heat exchange pipes (3) to the first manifold (1). The heat exchange medium flowing from the first manifold (1) to the outside flows through the first pipe (4) and then flows out.

23. The heat exchange system according to any one of claims 20 to 22, characterized in that, Define one of the planes parallel to the axial direction of the first manifold (1) as the first plane. In the axial direction perpendicular to the first manifold (1), the first manifold (1) has a first projection on the first plane and a second projection on the first plane. The length of the overlapping part of the second projection and the first projection in the axial direction of the first manifold (1) is L1, and the length of the first manifold (1) is L2, where 0.5≤L1 / L2≤1.

24. The heat exchange system according to any one of claims 20 to 22, characterized in that, The equivalent diameter of the first tube (4) is greater than the equivalent diameter of the second tube (5).

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