Heat exchange monomer, heat exchanger and air conditioner

Abstract

This invention discloses a heat exchanger unit, a heat exchanger, and an air conditioner. The heat exchanger unit includes a heat exchange body and two connecting pipes. The heat exchange body has a heat exchange channel and two connecting holes, which are respectively formed at both ends along the length of the heat exchange body. The connecting holes penetrate the heat exchange body along its thickness and communicate with the heat exchange channel. The two connecting pipes surround the two connecting holes and extend outward from the side of the heat exchange body along its thickness. A communicating channel is formed inside the connecting pipe, which communicates with the connecting hole. The connecting pipes and the heat exchange body are an integral structure. According to the heat exchanger unit of this invention, the manufacturing process of the heat exchanger unit can be simplified and the production efficiency of the heat exchanger unit can be improved. At the same time, the contact thermal resistance between the connecting pipe and the heat exchanger unit can be eliminated. In addition, multiple heat exchanger units do not need to be connected by a manifold structure, which can improve the assembly efficiency of assembling multiple heat exchanger units into a heat exchanger.

Description

Technical Field

[0001] This invention relates to the field of air conditioning equipment technology, and in particular to a heat exchange unit, a heat exchanger, and an air conditioner. Background Technology

[0002] As people's living standards improve, air conditioners have gradually entered thousands of households, becoming an important household appliance in daily life. Air conditioners regulate the temperature of indoor spaces by driving forced air circulation to exchange heat with a heat exchanger. The heat exchanger in related technologies consists of a manifold and multiple heat exchange tubes connected to the manifold. The large number of parts directly affects the production and assembly efficiency of the heat exchanger. Summary of the Invention

[0003] The first aspect of this invention proposes a heat exchanger unit, which has the advantages of simple manufacturing process and improved assembly efficiency of heat exchangers.

[0004] According to a first aspect of the present invention, a heat exchange unit includes: a heat exchange body having a heat exchange channel and two connecting holes, the heat exchange channel extending along the length direction of the heat exchange body, the two connecting holes being formed at both ends of the length direction of the heat exchange body, the connecting holes penetrating the heat exchange body along the thickness direction of the heat exchange body and communicating with the heat exchange channel; and two connecting pipes surrounding the two connecting holes, the connecting pipes extending outward from the side of the heat exchange body along the thickness direction of the heat exchange body, each connecting pipe having a communicating channel communicating with the connecting holes, and the connecting pipes and the heat exchange body being an integral structure.

[0005] According to the first aspect of the present invention, by providing two connecting pipes, the orderly flow of refrigerant within the heat exchanger unit can be better ensured, thereby improving the heat exchange efficiency of the heat exchanger unit. By integrating the two connecting pipes into the heat exchanger body, the manufacturing process of the heat exchanger unit can be simplified and its production efficiency improved, while also eliminating the contact thermal resistance between the connecting pipes and the heat exchanger unit. Furthermore, multiple heat exchanger units do not require connection via a manifold structure, which improves the assembly efficiency of assembling multiple heat exchanger units to form a heat exchanger.

[0006] According to some embodiments of the present invention, the inner surface of the connecting tube is flush with the inner surface of the connecting hole.

[0007] According to some embodiments of the present invention, in the length direction of the heat exchange body, the heat exchange channel extends through both end faces of the heat exchange body, and the heat exchange body is provided with a first sealing member for sealing both ends of the heat exchange channel.

[0008] According to some embodiments of the present invention, the outer diameter R1 of the connecting pipe and the width W1 of the heat exchange body satisfy: R1 < W1.

[0009] According to some embodiments of the present invention, the dimension L1 of the heat exchange channel in the thickness direction of the heat exchange body satisfies: 0.2mm≤L1≤0.4; and / or, the dimension L2 of the heat exchange channel in the width direction of the heat exchange body satisfies: L2≤7mm.

[0010] According to some embodiments of the present invention, the heat exchange channel extends along the length direction of the heat exchange body, and the heat exchange channel is provided with a plurality of channels arranged at intervals along the width direction of the heat exchange body, and the plurality of heat exchange channels are all in communication with the connecting hole.

[0011] According to some embodiments of the present invention, the spacing L3 between two adjacent heat exchange channels satisfies: 0.1mm≤L3≤0.4mm.

[0012] According to some embodiments of the present invention, the projection of the connecting hole on the reference surface is a first projection, the projection of the heat exchange channel on the reference surface is a second projection, the reference surface is perpendicular to the length direction of the heat exchange body, and the second projection is located within the first projection.

[0013] According to some embodiments of the present invention, the width W1 of the heat exchange body satisfies W1≤7mm; and / or the thickness H1 of the heat exchange body satisfies: H1≤0.8mm.

[0014] According to some embodiments of the present invention, the heat exchange unit further includes two heat exchange fins, which are respectively disposed on opposite sides of the heat exchange body in the width direction.

[0015] According to some embodiments of the present invention, the heat exchange fins and the heat exchange body are integrally formed; and / or, the dimension W2 of the heat exchange fins in the width direction of the heat exchange body satisfies: W2≤7mm.

[0016] According to some embodiments of the present invention, the two heat exchange fins are a first fin and a second fin, wherein in the direction from the first fin to the second fin, the thickness of the first fin remains constant and is less than the thickness of the heat exchange body, and the thickness of the second fin gradually decreases.

[0017] According to some embodiments of the present invention, the dimension H2 of the first fin in the thickness direction of the heat exchange body satisfies: H2≤0.4mm.

[0018] A second aspect of the present invention provides a heat exchanger.

[0019] According to a second aspect of the present invention, a heat exchanger includes: multiple heat exchange units connected in sequence, wherein the heat exchange unit is the aforementioned heat exchange unit, and two connecting pipes of the heat exchange unit are respectively a first connecting pipe and a second connecting pipe, the plurality of first connecting pipes are connected in sequence to form a first manifold, and the plurality of second connecting pipes are connected in sequence to form a second manifold.

[0020] According to a second aspect embodiment of the present invention, in a heat exchanger, a plurality of first connecting pipes are sequentially connected to form a first manifold, and a plurality of second connecting pipes are sequentially connected to form a second manifold. This ensures the orderly flow of refrigerant within the heat exchanger, thereby improving the heat exchange efficiency. Furthermore, the sequential connection of multiple heat exchange units to form the heat exchanger eliminates the need for an additional manifold structure, effectively reducing the number of parts required and simplifying the heat exchanger's structure while improving assembly efficiency.

[0021] According to some embodiments of the present invention, the two ends of the connecting pipe are respectively provided with a first connecting structure and a second connecting structure, and the connecting pipe of the heat exchange unit is connected to the second connecting structure of the connecting pipe of the adjacent heat exchange unit through the first connecting structure; or the heat exchange body has a first side and a second side on opposite sides in the thickness direction, the connecting pipe extends outward from the first side, the end of the connecting pipe away from the heat exchange unit has a first connecting structure, and the second side has a second connecting structure corresponding to the first connecting structure.

[0022] According to some embodiments of the present invention, the first connecting structure is formed as a positioning protrusion, and the second connecting structure is formed as a positioning groove.

[0023] According to some embodiments of the present invention, the first connecting structure is formed with a first positioning surface, and the second connecting structure is formed with a second positioning surface adapted to cooperate with the first positioning surface; wherein, both the first positioning surface and the second positioning surface are stepped surfaces; or, in the direction from the first connecting structure to the second connecting structure, both the first positioning surface and the second positioning surface extend obliquely toward the direction close to or away from the central axis of the connecting pipe.

[0024] According to some embodiments of the present invention, the length direction of the heat exchange unit is vertical; and / or, two adjacent heat exchange units are welded together.

[0025] According to some embodiments of the present invention, the two ends of the first manifold are respectively formed as a first port and a second port, and the two ends of the second manifold are respectively a third port and a fourth port, and two of the first port, the second port, the third port and the fourth port are provided with a second sealing member.

[0026] A third aspect of the present invention provides an air conditioner.

[0027] An air conditioner according to a third aspect of the present invention includes: the heat exchanger described above.

[0028] According to an air conditioner based on a third aspect of the present invention, a plurality of first connecting pipes are sequentially connected to form a first manifold, and a plurality of second connecting pipes are sequentially connected to form a second manifold. This ensures the orderly flow of refrigerant within the heat exchanger, thereby improving the heat exchange efficiency of the heat exchanger. Furthermore, the sequential connection of multiple heat exchange units to form the heat exchanger eliminates the need for an additional manifold structure, effectively reducing the number of heat exchanger components, simplifying the heat exchanger's structure, and improving its assembly efficiency.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a heat exchange unit according to an embodiment of the present invention;

[0031] Figure 2 yes Figure 1 Enlarged view of region A in the middle;

[0032] Figure 3 This is a schematic diagram of one side of a heat exchange unit in the thickness direction according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the connection between two heat exchange units according to an embodiment of the present invention;

[0034] Figure 5 It is a cross-section of two connected heat exchange units in the width direction according to an embodiment of the present invention;

[0035] Figure 6 yes Figure 5 Enlarged view of region B in the middle;

[0036] Figure 7 It is a cross-section in the width direction of two connected heat exchange units according to another embodiment of the present invention;

[0037] Figure 8 yes Figure 7 Enlarged view of region C in the middle;

[0038] Figure 9 This is a cross-sectional view of the heat exchange unit at the connecting pipe according to an embodiment of the present invention;

[0039] Figure 10 This is a cross-sectional view of two connected heat exchange units at the connecting pipe according to an embodiment of the present invention;

[0040] Figure 11 This is a schematic diagram of a heat exchanger according to an embodiment of the present invention;

[0041] Figure 12 This is a schematic diagram of the refrigeration system of an air conditioner according to an embodiment of the present invention.

[0042] Figure label:

[0043] 1000. Refrigeration system;

[0044] 100. Heat exchanger;

[0045] 10. Heat exchange unit; 1. Heat exchange body; 11. Heat exchange channel; 12. Connecting hole; 13. Second connecting structure; 131. Second positioning surface;

[0046] 2. Connecting pipe; 21. Connecting channel; 22. First connecting structure; 221. First positioning surface;

[0047] 3. Heat exchange fins; 3a. First fin; 3b. Second fin;

[0048] 4. First sealing component;

[0049] 20. Second sealing component; 30. First connecting pipe; 40. Second connecting pipe;

[0050] 200, Compressor; 300, Four-way reversing valve; 400, Expansion valve; 500, Evaporator; 600, Gas-liquid separator; 700, Oil separator; 800, First shut-off valve; 900, Second shut-off valve. Detailed Implementation

[0051] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. 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.

[0052] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0053] The heat exchanger unit 10 according to a first aspect of the present invention will now be described with reference to the accompanying drawings.

[0054] like Figures 1 to 3 As shown, the heat exchange unit 10 according to the first aspect embodiment of the present invention includes: a heat exchange body 1 and two connecting pipes 2. The heat exchange body 1 has a heat exchange channel 11 and two connecting holes 12. The heat exchange channel 11 extends along the length direction of the heat exchange body 1. The two connecting holes 12 are respectively formed at both ends of the length direction of the heat exchange body 1. The connecting holes 12 penetrate the heat exchange body 1 along the direction of the heat exchange body 1 and communicate with the heat exchange channel 11. The two connecting pipes 2 are respectively surrounding the two connecting holes 12. The connecting pipes 2 extend outward from the side of the heat exchange body 1 along the thickness direction of the heat exchange body 1. A communicating channel 21 is formed inside the connecting pipe 2. The communicating channel 21 communicates with the connecting holes 12. The connecting pipe 2 and the heat exchange body 1 are an integral structure.

[0055] In other words, the connecting channel 21 and the connecting hole 12 communicate to form a refrigerant channel extending through the thickness direction of the heat exchange body 1. The connecting channel 21 is connected to the heat exchange channel 11 through the connecting hole 12. Two heat exchange units 10 can be connected together through the connecting pipe 2. For example, the end of the connecting pipe 2 of one heat exchange unit 10 away from the connecting hole 12 can be connected to the end of the connecting hole 12 of another heat exchange unit 10 away from the connecting pipe 2. Thus, the connecting holes 12 and the connecting channel 21 of the two connected heat exchange units 10 together form a continuous refrigerant channel. Furthermore, it can be understood that there are two connecting holes 12 and two connecting pipes 2. Therefore, refrigerant channels can be formed at both ends of the heat exchange body 1. One of the two refrigerant channels can be the input refrigerant channel, and the other of the two refrigerant channels can be the output refrigerant channel. The input refrigerant channel can deliver refrigerant into the heat exchange channel 11, and the refrigerant after heat exchange through the heat exchange body 1 can be discharged through the output refrigerant channel. In other words, by setting two connection holes 12 and two connection pipes 2, the orderly flow of refrigerant in the heat exchange unit 10 can be better guaranteed, thereby improving the heat exchange efficiency of the heat exchange unit 10.

[0056] Furthermore, since the connection hole 12 is formed on the heat exchange body 1, compared with the structure in the related technology that sets the manifold structure at both ends of the heat exchange unit, the amount of refrigerant required to fill the heat exchanger can be reduced, thereby reducing the cost of refrigerant usage.

[0057] The two connecting pipes 2 and the heat exchange body 1 are integrated into one structure, which not only ensures the structural and performance stability of the two connecting pipes 2 and the heat exchange body 1, but also facilitates molding and manufacturing. Furthermore, it eliminates the need for fittings and connection processes used to connect the two connecting pipes 2 and the heat exchange body 1, resulting in low production costs and significantly improved assembly efficiency. This ensures the reliability of the connection between the two connecting pipes 2 and the heat exchange body 1. Moreover, the integrated structure has higher overall strength and stability, and a longer service life.

[0058] In the process of assembling multiple heat exchanger units 10 into a heat exchanger 100, only the connecting pipes 2 of the multiple heat exchanger units 10 need to be connected accordingly, eliminating the need for structures such as manifolds. This significantly improves the production and assembly efficiency of the heat exchanger 100 and effectively eliminates the contact thermal resistance between the connecting pipes 2 and the heat exchanger units 10. Therefore, by making the two connecting pipes 2 and the heat exchanger body 1 an integral structure, the manufacturing process of the heat exchanger units 10 can be simplified and the production efficiency of the heat exchanger units 10 can be improved, while eliminating the contact thermal resistance between the connecting pipes 2 and the heat exchanger units 10. Furthermore, since multiple heat exchanger units 10 do not need to be connected by a manifold structure, the assembly efficiency of assembling multiple heat exchanger units 10 into the heat exchanger 100 can be improved.

[0059] According to the first aspect of the present invention, the heat exchange unit 10, by providing two connecting holes 12 and two connecting pipes 2, can better ensure the orderly flow of refrigerant within the heat exchange unit 10, thereby improving the heat exchange efficiency of the heat exchange unit 10. The two connecting pipes 2 are integrally formed with the heat exchange body 1, which can simplify the manufacturing process of the heat exchange unit 10 and improve its production efficiency, while also eliminating the contact thermal resistance between the connecting pipes 2 and the heat exchange unit 10. Furthermore, multiple heat exchange units 10 do not need to be connected by a manifold structure, which can improve the assembly efficiency of assembling multiple heat exchange units 10 to form the heat exchanger 100.

[0060] In addition, the two connecting holes 12 are respectively located at opposite ends of the heat exchange body 1 in the length direction. Therefore, in the length direction of the heat exchange body 1, the refrigerant can enter one end of the heat exchange channel 11 through one of the connecting holes 12 and be discharged through the connecting hole 12 at the other end of the heat exchange channel 11. This allows the refrigerant to better cover the heat exchange body 1 in the length direction of the flow path within the heat exchange channel 11, thereby improving the heat exchange efficiency of the heat exchange unit 10.

[0061] According to some embodiments of the present invention, the inner surface of the connecting pipe 2 is flush with the inner surface of the connecting hole 12. This reduces the resistance to refrigerant flow between the connecting channel 21 and the connecting hole 12, thereby reducing the power loss of the refrigerant flow within the heat exchange unit 10.

[0062] According to some embodiments of the present invention, in the length direction of the heat exchange body 1, the heat exchange channel 11 extends through both end faces of the heat exchange body 1, and the heat exchange body 1 is provided with a first sealing member 4 for sealing both ends of the heat exchange channel 11. That is, the heat exchange channel 11 extends through the heat exchange body 1 along its length direction, thereby reducing the processing difficulty of the heat exchange channel 11 and improving the manufacturing efficiency of the heat exchange unit 10. Furthermore, it is understood that since the heat exchange channel 11 extends to both end faces of the heat exchange body 1 in the length direction, the first sealing member 4 can effectively seal the openings at both ends of the heat exchange channel 11 to prevent refrigerant leakage.

[0063] In a specific example, along the length of the heat exchange body 1, the heat exchange channel 11 includes a first channel, a second channel, and a third channel arranged in sequence. The second channel is located between two connecting holes 12, and the first channel and the third channel are located on opposite sides of the two connecting holes 12. The second channel is connected to the first channel and the third channel through the two connecting holes 12, respectively. Both the first channel and the third channel are through holes.

[0064] It should be noted that this is only an example of one type of heat exchange channel 11, and is not a limitation on the type of heat exchange channel 11. In other embodiments, the first channel and the third channel may also be blind holes that open toward the second channel, thereby eliminating the need for the first sealing member 4.

[0065] In addition, during the process of using multiple heat exchanger units 10 connected in sequence to form a heat exchanger 100, one end of the multiple heat exchanger units 1 can share the same first sealing member 4 for sealing, which can simplify the assembly process of the heat exchanger 100 and improve the assembly efficiency of the heat exchanger 100.

[0066] According to some embodiments of the present invention, such as Figure 9 As shown, the outer diameter R1 of the connecting pipe 2 and the width W1 of the heat exchange body 1 satisfy the condition: R1 < W1. Therefore, by controlling the outer diameter of the connecting pipe 2 to be smaller than the width of the heat exchange body 1, the space occupied by the connecting pipe 2 on both sides of the width direction of the heat exchange body 1 can be better avoided, thereby reducing the space occupied by the heat exchange body 1.

[0067] According to some embodiments of the present invention, the dimension L1 of the heat exchange channel 11 in the thickness direction of the heat exchange body 1 satisfies: 0.2mm ≤ L1 ≤ 0.4. It can be understood that a larger dimension of the heat exchange channel 11 in the thickness direction of the heat exchange body 1 results in a larger flow area, lower flow resistance of the refrigerant within the heat exchange channel 11, and a larger amount of refrigerant that the heat exchange channel 11 can accommodate. However, excessive refrigerant in the heat exchange channel 11 will lead to insufficient heat exchange and high energy loss. Conversely, a smaller dimension of the heat exchange channel 11 in the thickness direction of the heat exchange body 1 allows for more complete heat exchange of the refrigerant within the heat exchange channel 11, but an increased flow area results in greater flow resistance of the refrigerant within the heat exchange channel 11.

[0068] Therefore, by controlling the dimension of the heat exchange channel 11 in the thickness direction of the heat exchange body 1 within the range of 0.2 mm to 0.4 mm, it is possible to ensure the refrigerant flow rate within the heat exchange channel 11, reduce the refrigerant flow resistance within the heat exchange channel 11, and ensure sufficient heat exchange of the refrigerant within the heat exchange channel 11. For example, the dimension of the heat exchange channel 11 in the thickness direction of the heat exchange body 1 can be 0.2 mm, 0.22 mm, 0.25 mm, 0.27 mm, 0.3 mm, 0.32 mm, 0.35 mm, 0.38 mm, 0.4 mm, etc.

[0069] According to some embodiments of the present invention, the dimension L2 of the heat exchange channel 11 in the width direction of the heat exchange body 1 satisfies: L2 ≤ 7 mm. A larger dimension of the heat exchange channel 11 in the width direction results in a larger flow area and lower flow resistance. However, excessive refrigerant in the heat exchange channel 11 will lead to insufficient heat exchange and high energy loss, while requiring a larger dimension of the heat exchange body 1 in the width direction. Therefore, by controlling the dimension of the heat exchange channel 11 in the width direction of the heat exchange body 1 to no more than 7 mm, the dimension of the heat exchange body 1 in the width direction can be better controlled, facilitating the miniaturization of the heat exchanger 100 and reducing energy loss due to low refrigerant heat exchange efficiency. For example, the dimension of the heat exchange channel 11 in the width direction of the heat exchange body 1 can be 7 mm, 6.5 mm, 6 mm, 5.5 mm, 5 mm, 4.5 mm, 4 mm, 3.5 mm, 3 mm, 2.5 mm, 2 mm, 1.5 mm, 1 mm, 0.5 mm, etc.

[0070] According to some embodiments of the present invention, the heat exchange channel 11 extends along the length direction of the heat exchange body 1, and the heat exchange channel 11 has multiple channels spaced apart along the width direction of the heat exchange body 1, all of which communicate with the connecting hole 12. That is, the refrigerant entering the connecting hole 12 can be divided into multiple smaller streams of refrigerant and flow along the multiple heat exchange channels 11 respectively. The refrigerant in each heat exchange channel 11 can transfer heat through contact with the inner circumferential surface of the heat exchange channel 11. This increases the contact area between the refrigerant and the heat exchange unit 10, thereby improving the heat exchange efficiency of the refrigerant within the heat exchange unit 10. Simultaneously, it makes the overall structure of the heat exchange unit 10 compact, reducing the space occupied by the heat exchange unit 10 while ensuring its heat exchange efficiency.

[0071] According to some embodiments of the present invention, the distance L3 between two adjacent heat exchange channels 11 satisfies: 0.1mm ≤ L3 ≤ 0.4mm. It can be understood that, with a fixed width of the heat exchange body 1, the greater the distance between two adjacent heat exchange channels 11, the lower the possibility of mutual interference between the refrigerant in the two adjacent heat exchange channels 11 and the heat exchange body 1 during heat exchange. This results in fewer heat exchange channels 11 that can be arranged in the width direction of the heat exchange body 1, and lower space utilization. Conversely, the closer the distance between two adjacent heat exchange channels 11, the more heat exchange channels 11 can be arranged in the width direction of the heat exchange body 1, and higher space utilization. However, excessively close distances may lead to simultaneous heat exchange between the refrigerant in the two adjacent heat exchange channels 11 and the portion of the heat exchange body 1 between the two refrigerant channels, resulting in energy loss.

[0072] Therefore, by controlling the spacing between two adjacent heat exchange channels 11 within the range of 0.1mm to 0.4mm, the space utilization rate on the heat exchange body 1 can be improved, while reducing the energy loss caused by heat exchange between the refrigerant and the heat exchange body 1 in the same area. For example, the spacing between two adjacent heat exchange channels 11 can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, etc.

[0073] According to some embodiments of the present invention, the projection of the connecting hole 12 onto the reference plane is a first projection, and the projection of the heat exchange channel 11 onto the reference plane is a second projection. The reference plane is perpendicular to the length direction of the heat exchange body 1, and the second projection is located within the first projection. That is, each heat exchange channel 11 is in relative communication with the connecting hole 12 along the length direction of the heat exchange body 1. As a result, the flow resistance of the refrigerant in the connecting hole 12 entering each heat exchange channel 11 can be reduced, and the amount of refrigerant in each heat exchange channel 11 can be more evenly distributed to ensure the heat exchange uniformity on the heat exchange body 1.

[0074] According to some embodiments of the present invention, the width W1 of the heat exchange body 1 satisfies W1≤7mm. Therefore, by controlling the width of the heat exchange body 1 to be no greater than 7mm, the heat exchange body 1 has a compact structure and occupies little space. For example, the width of the heat exchange body 1 is 7mm, 6.8mm, 6.5mm, 6.3mm, 6mm, 5.7mm, 5.5mm, 5.2mm, 5mm, etc.

[0075] According to some embodiments of the present invention, the thickness H1 of the heat exchange body 1 satisfies: H1 ≤ 0.8 mm. It is understood that as airflow flows along the width direction of the heat exchange body 1, a larger thickness of the heat exchange body 1 results in a larger obstruction area for the airflow flowing along its width. Therefore, by controlling the thickness of the heat exchange body 1 to no more than 0.8 mm, the resistance of the heat exchange body 1 to the flowing air can be effectively reduced, thereby improving the heat exchange efficiency between the heat exchange body 1 and the air. For example, the thickness of the heat exchange body 1 can be 0.8 mm, 0.88 mm, 0.85 mm, 0.83 mm, 0.8 mm, 0.77 mm, 0.75 mm, 0.72 mm, 0.7 mm, etc.

[0076] According to some embodiments of the present invention, such as Figure 3 , Figure 9 and Figure 10 As shown, the heat exchange unit 10 also includes two heat exchange fins 3, which are respectively disposed on opposite sides of the heat exchange body 1 in the width direction. Thus, by connecting the two heat exchange fins 3 to the heat exchange body 1, the contact area between the heat exchange unit 10 and the air can be increased, thereby improving the heat exchange efficiency between the refrigerant and the air through the heat exchange unit 10.

[0077] Specifically, under the same heat transfer temperature difference, the heat transfer capacity of heat exchanger 100 is directly proportional to the overall heat transfer coefficient and the heat transfer area outside the tube, as stated in the heat transfer theory:

[0078] Heat exchange Q = K·A0·ΔT;

[0079] Overall heat transfer coefficient

[0080] Air-side heat transfer coefficient h0=(A p +η·A f ) / A0×h a ;

[0081] Where A0: air heat exchange area; h w Heat transfer coefficient inside heat exchange channel 11; A p : Heat exchange area on the outer side of heat exchanger body 1; h a : The heat transfer coefficient on the outer side of heat exchanger body 1 was not corrected; A pi : Heat transfer area on the heat transfer medium side; Af Heat exchange fin 3 heat exchange area; A co η: Contact area between heat exchange fin 3 and heat exchange channel 11; h: Heat exchange efficiency of heat exchange fin 3; c ΔT: Contact conductivity between heat exchange fins 3 and heat exchange body 1; ΔT: Temperature difference.

[0082] In the formula for the overall heat transfer coefficient, The contact thermal resistance between the heat exchange fins 3 and the heat exchange body 1 is a factor. The greater the contact thermal resistance, the smaller the overall heat transfer coefficient and the lower the heat exchange capacity. In this application, the heat exchange body 1 and the heat exchange fins 3 of the heat exchange unit 10 are designed as an integral structure with no contact thermal resistance, thus increasing the overall heat transfer coefficient. In the formula for the air-side heat transfer coefficient, the greater the heat exchange efficiency of the heat exchange fins 3, the greater the air-side heat transfer coefficient, the greater the overall heat transfer coefficient K, and the higher the heat exchange capacity of the heat exchanger 100. In this application, the heat exchange efficiency of the heat exchange fins 3 is approximately 1, and that of other heat exchange devices is approximately 0.8-0.9, thereby enhancing the heat exchange capacity of the heat exchanger 100. Under the commonly used airflow speed of 1.6 m / s in the outdoor unit of the air conditioner, the heat exchange capacity of the heat exchanger 100 is increased by more than 40%, and the pressure drop is reduced by more than 20%.

[0083] According to some embodiments of the present invention, the heat exchange fins 3 and the heat exchange body 1 are integrally formed. Therefore, this integral structure not only ensures the structural and performance stability of the heat exchange fins 3 and the heat exchange body 1, but also facilitates molding and simplifies manufacturing. Furthermore, it eliminates the need for assembly parts and connection processes used to connect the heat exchange fins 3 and the heat exchange body 1, resulting in lower production costs and significantly improved assembly efficiency. This ensures reliable connection between the heat exchange fins 3 and the heat exchange body 1. Moreover, the integral structure exhibits higher overall strength and stability, and a longer service life. In some embodiments, the heat exchange unit 10 is an integral structural component.

[0084] In some embodiments, the heat exchange fin 3 can be a corrugated fin, and the heat exchange fin 3 is provided with reinforcing ribs to improve the structural strength of the heat exchange fin 3. At the same time, the heat exchange fin 3 is provided with drainage grooves to ensure the drainage capacity of the heat exchange unit 10.

[0085] In some embodiments, the heat exchange unit is a one-piece molded part.

[0086] According to some embodiments of the present invention, the dimension W2 of the heat exchange fins 3 in the width direction of the heat exchange body 1 satisfies: W2 ≤ 7 mm. Therefore, by controlling the dimension of the heat exchange fins 3 in the width direction of the heat exchange body 1 to no more than 7 mm, the overall structure of the heat exchange unit 10 in the width direction of the heat exchange body 1 is made compact, thereby reducing the space occupied by the heat exchange unit 10. For example, the dimension of the heat exchange fins 3 in the width direction of the heat exchange body 1 can be 7 mm, 6.8 mm, 6.5 mm, 6.3 mm, 6 mm, 5.7 mm, 5.5 mm, 5.2 mm, 5 mm, etc.

[0087] According to some embodiments of the present invention, the two heat exchange fins 3 are respectively a first fin 3a and a second fin 3b. In the direction from the first fin 3a to the second fin 3b, the thickness of the first fin 3a remains constant and is less than the thickness of the heat exchange body 1, while the thickness of the second fin 3b gradually decreases. Specifically, the first fin 3a is located on the windward side of the heat exchange body 1, and the second fin 3b is located on the leeward side of the heat exchange body 1. The edge of the first fin 3a in the thickness direction is formed as a straight line, which is simple in structure and can reduce the processing difficulty of the first fin 3a. At the same time, it ensures that the first fin 3a can divide the airflow into two uniform streams that flow to the opposite sides of the heat exchange unit 10 respectively. Furthermore, the first fin 3a occupies little space in the thickness direction of the heat exchange body 1, which is conducive to the safety of the heat exchange unit 10. Furthermore, it is understandable that the resistance of the heat exchanger 100 in the flow field consists of frictional resistance and pressure differential resistance. At the operating flow rate of the air conditioner, pressure differential resistance dominates. In existing heat exchange devices, when the airflow reaches a certain position in the latter half of the circular arc of the tube, the streamline of the airflow no longer adheres to the surface of the circular tube but separates, resulting in increased flow resistance. Therefore, by setting the second fin 3b to a shape with a gradually narrowing width along the airflow direction, after the airflow passes through the heat exchange body 1, the airflow can gradually concentrate along the relatively smooth arc surface of the second fin 3b, reducing some of the flow resistance caused by the separation phenomenon.

[0088] In a specific example, in the width direction of the heat exchanger body 1, the center lines of the first fin 3a and the second fin 3b coincide with the center line of the heat exchanger body 1. This makes the structure of the heat exchanger unit 10 more symmetrical and can ensure the uniformity of airflow on both sides of the heat exchanger unit 10.

[0089] According to some embodiments of the present invention, the dimension H2 of the first fin 3a in the thickness direction of the heat exchange body 1 satisfies: H2 ≤ 0.4 mm. It can be understood that as airflow flows along the width direction of the heat exchange body 1, the larger the dimension of the first fin 3a in the thickness direction of the heat exchange body 1, the larger the obstruction area of ​​the airflow flowing along the width direction of the heat exchange body 1. Therefore, by controlling the dimension of the first fin 3a in the thickness direction of the heat exchange body 1 to no more than 0.4 mm, the resistance of the first fin 3a to the flowing air can be effectively reduced, thereby improving the heat exchange efficiency between the heat exchange body 1 and the air. For example, the dimension of the first fin 3a in the thickness direction of the heat exchange body 1 can be 0.4 mm, 0.48 mm, 0.45 mm, 0.43 mm, 0.4 mm, 0.37 mm, 0.35 mm, 0.32 mm, 0.3 mm, etc.

[0090] A heat exchanger 100 according to a second aspect of the present invention will now be described with reference to the accompanying drawings.

[0091] like Figure 11 As shown, the heat exchanger 100 according to a second aspect embodiment of the present invention includes: multiple heat exchange units 10 connected in sequence, the heat exchange unit 10 being any of the heat exchange units 10 described above, the two connecting pipes 2 of the heat exchange unit 10 being a first connecting pipe and a second connecting pipe, the plurality of first connecting pipes being connected in sequence to form a first manifold, and the plurality of second connecting pipes being connected in sequence to form a second manifold.

[0092] In other words, by sequentially connecting the first connecting pipes of multiple heat exchange units 10 and sequentially connecting the second connecting pipes of multiple heat exchange units 10, a first manifold and a second manifold connected to the heat exchange channels 11 within the multiple heat exchange units 10 can be formed. The refrigerant input to the heat exchanger 100 can be transported to the heat exchange channels 11 of the multiple heat exchange units 10 for heat exchange through the first manifold, and the refrigerant within the heat exchange channels 11 of the multiple heat exchange units 10 can be received and output to the heat exchanger 100 through the second manifold. This ensures the orderly flow of the refrigerant within the heat exchanger 100, thereby improving the heat exchange efficiency of the heat exchanger 100. Furthermore, by sequentially connecting multiple heat exchange units 10 to form the heat exchanger 100, the need for an additional manifold structure is eliminated, which effectively reduces the types of parts in the heat exchanger 100, simplifies its structure, and improves its assembly efficiency.

[0093] According to a second aspect embodiment of the present invention, in the heat exchanger 100, a plurality of first connecting pipes are sequentially connected to form a first manifold, and a plurality of second connecting pipes are sequentially connected to form a second manifold. This ensures the orderly flow of refrigerant within the heat exchanger 100, thereby improving the heat exchange efficiency of the heat exchanger 100. Furthermore, the heat exchanger 100 is formed by sequentially connecting a plurality of heat exchange units 10, eliminating the need for an additional manifold structure. This reduces the number of parts in the heat exchanger 100, simplifies its structure, and improves its assembly efficiency.

[0094] In some embodiments, the heat exchange unit 10 may have protruding reinforcing structures on both sides in the thickness direction. The reinforcing structures are integral with the heat exchange unit, thereby improving the structural strength of the heat exchange unit 10 while effectively disrupting the gas flow between the two heat exchange units 10, thus enhancing the heat exchange capacity of the heat exchange unit 10. The reinforcing structures can be hemispherical, semi-elliptical, cuboid, pyramidal, etc., without specific limitations.

[0095] According to some embodiments of the present invention, the two ends of the connecting pipe 2 are respectively provided with a first connecting structure 22 and a second connecting structure 13. The connecting pipe 2 of the heat exchange unit 10 is connected to the second connecting structure 13 of the connecting pipe 2 of the adjacent heat exchange unit 10 through the first connecting structure 22. Thus, by setting the first connecting structure 22 and the second connecting structure 13, the positioning and connection difficulty between the connecting pipes of two adjacent heat exchange units 10 can be reduced, thereby improving the assembly efficiency of the heat exchanger 100.

[0096] According to some embodiments of the present invention, such as Figures 5-8 As shown, the heat exchanger body 1 has two opposite sides in the thickness direction, namely the first side and the second side. The connecting pipe 2 extends outward from the first side, and a first connecting structure 22 is formed at the end of the connecting pipe 2 away from the heat exchanger unit 10. A second connecting structure 13 corresponding to the first connecting structure 22 is formed on the second side. Therefore, by setting the first connecting structure 22 and the second connecting structure 13, the positioning and connection difficulty between the connecting pipes of two adjacent heat exchanger units 10 can be reduced, thereby improving the assembly efficiency of the heat exchanger 100.

[0097] According to some embodiments of the present invention, the first connecting structure 22 is formed as a positioning protrusion, and the second connecting structure 13 is formed as a positioning groove. Therefore, when two heat exchanger units 10 are connected, the positioning protrusion of one heat exchanger unit 10 can be inserted into the positioning groove of the other heat exchanger unit 10 to achieve positioning. Through the cooperation of the positioning protrusion and positioning groove of the two connected heat exchanger units 10, the position between the two connected heat exchanger units 10 can be positioned better, so as to facilitate subsequent fixing by welding or other methods, thereby improving the installation accuracy of the heat exchanger units 10.

[0098] According to some embodiments of the present invention, such as Figure 5 , Figure 6 and Figure 10 As shown, the first connecting structure 22 has a first positioning surface, and the second connecting structure 13 has a second positioning surface suitable for mating with the first positioning surface. Both the first and second positioning surfaces are stepped surfaces. This effectively increases the contact area between the first and second positioning surfaces, thereby improving the positioning effect between them.

[0099] According to some embodiments of the present invention, such as Figure 7 and Figure 8As shown, the first connecting structure 22 has a first positioning surface, and the second connecting structure 13 has a second positioning surface adapted to mate with the first positioning surface. In the direction from the first connecting structure 22 to the second connecting structure 13, both the first and second positioning surfaces extend inclined towards or away from the central axis of the connecting pipe 2. Therefore, while ensuring a good positioning effect through the mating of the first and second positioning surfaces, the first and second positioning surfaces can also provide good guiding properties, thereby reducing the difficulty of mating between the first and second positioning surfaces of the two connected heat exchanger units 10 and improving the assembly efficiency of the heat exchanger 100.

[0100] According to some embodiments of the present invention, the length direction of the heat exchange unit 10 is vertical. Therefore, when condensation forms on the outer wall surface of the heat exchange unit 10, it can flow smoothly downward along the heat exchange unit 10 to prevent condensation from remaining on the heat exchange unit 10, thereby improving the drainage capacity of the heat exchanger 100 under humid and low-temperature defrosting conditions.

[0101] According to some embodiments of the present invention, two adjacent heat exchanger units 10 are welded together. That is, the connecting pipe 2 of the heat exchanger unit 10 is connected to the connecting pipe 2 of another adjacent heat exchanger unit 10 by welding. As a result, the contact thermal resistance between the two connected connecting pipes 2 can be better eliminated, and the connection stability between two adjacent heat exchanger units 10 can be improved, thereby improving the structural strength of the heat exchanger 100.

[0102] According to some embodiments of the present invention, the two ends of the first manifold are respectively formed as a first port and a second port, and the two ends of the second manifold are respectively a third port and a fourth port. Two of the first, second, third, and fourth ports are provided with second sealing members 20. Therefore, leakage can be prevented from occurring at the two ports blocked by the second sealing members 20. The two ports not blocked by the second sealing members 20 can serve as the refrigerant inlet and refrigerant outlet of the heat exchanger 100, respectively, to ensure the orderly flow of refrigerant within the heat exchanger 100.

[0103] In a specific example, the heat exchanger 100 further includes a first connecting pipe 30 and a second connecting pipe 40. The first port and the third port are located on the same side of the heat exchanger 100 in the thickness direction of the heat exchange unit 10. The first connecting pipe 30 is connected to the first port, and the second connecting pipe 40 is connected to the third port. The second port and the fourth port are provided with second sealing elements 20. The refrigerant can enter the first manifold through the first connecting pipe 30 and be distributed to multiple heat exchange units 10. The refrigerant after heat exchange in the multiple heat exchange units 10 enters the second manifold and is discharged from the heat exchanger 100 through the second connecting pipe 40.

[0104] An air conditioner according to a third aspect of the present invention will now be described with reference to the accompanying drawings.

[0105] An air conditioner according to a third aspect of the present invention includes: a heat exchanger 100.

[0106] According to an embodiment of the air conditioner of the third aspect of the present invention, a plurality of first connecting pipes are sequentially connected to form a first manifold, and a plurality of second connecting pipes are sequentially connected to form a second manifold. This ensures the orderly flow of refrigerant within the heat exchanger 100, thereby improving the heat exchange efficiency of the heat exchanger 100. Furthermore, the heat exchange unit 10 is sequentially connected to form the heat exchanger 100, eliminating the need for an additional manifold structure. This reduces the number of parts in the heat exchanger 100, simplifies its structure, and improves its assembly efficiency.

[0107] In a specific example, such as Figure 12 As shown, the air conditioner includes a refrigeration system 1000, which includes a heat exchanger 100, a compressor 200, a four-way reversing valve 300, an expansion valve 400, an evaporator 500, a gas-liquid separator 600, an oil separator 700, a first shut-off valve 800, and a second shut-off valve 900. The heat exchanger 100 is located on the outdoor unit of the air conditioner, and the evaporator 500 is located on the indoor unit of the air conditioner.

[0108] Specifically, the compressor 200 has an exhaust port and a return port, the four-way reversing valve 300 has a first port, a second port, a third port, and a fourth port, and an oil separator 700 is located between the exhaust port and the first port to separate the lubricating oil in the high-pressure vapor discharged from the compressor 200, preventing the lubricating oil from flowing and damaging the refrigeration system 1000. A gas-liquid separator 600 is located between the return port and the second port to ensure rapid separation of the gas-liquid mixture, ensuring that only gas enters the compressor 200 and preventing liquid from entering the compressor 200 and causing liquid slugging. The expansion valve 400 has a liquid inlet and a liquid outlet, the heat exchanger 100 is connected between the second port and the liquid inlet, and the two ends of the evaporator 500 are connected to the third port and the liquid outlet respectively through a first shut-off valve 800 and a second shut-off valve 900. In some embodiments, the gas-liquid separator 600 is also equipped with a filter or filter screen for further filtering and separating small liquid particles or solid impurities, thereby ensuring the purity of the gas.

[0109] In refrigeration mode, the four-way reversing valve 300 controls the connection between the first and second ports, and between the fourth and third ports. The compressor 200 generates high-temperature, high-pressure gaseous refrigerant, which sequentially enters the heat exchanger 100 through the exhaust port, the first port, and the second port. Inside the heat exchanger 100, the high-temperature, high-pressure gaseous refrigerant is cooled and condensed into medium-temperature, high-pressure liquid refrigerant, which then enters the expansion valve 400. The expansion valve 400 reduces the condensation pressure of the refrigerant to the evaporation pressure, causing a portion of the liquid refrigerant to convert into vapor, forming a low-temperature, low-pressure gas-liquid mixture, which then enters the evaporator 500 through the liquid outlet. The refrigerant entering the evaporator 500 absorbs heat and undergoes a phase change, forming a lower-temperature gaseous or gas-liquid mixture, which flows back to the compressor 200 sequentially through the third port, the fourth port, and the return port.

[0110] In heating mode, the four-way reversing valve 300 controls the connection between the first and third ports, and the fourth port to the second port. The compressor 200 generates high-temperature, high-pressure gaseous refrigerant, which enters the evaporator 500 sequentially through the first and third ports. After releasing heat, the refrigerant in the evaporator 500 condenses into a medium-temperature, high-pressure liquid refrigerant, which then enters the expansion valve 400 through the liquid outlet. The expansion valve 400 reduces the condensing pressure of the refrigerant to the evaporating pressure, and a portion of the liquid refrigerant is converted into vapor, forming a low-temperature, low-pressure gas-liquid mixture. This vapor then enters the heat exchanger 100 through the liquid inlet. The refrigerant in the heat exchanger 100 absorbs heat and undergoes a phase change, forming a lower-temperature gaseous or gas-liquid mixture, which then flows back to the compressor 200 sequentially through the fourth port, the second port, and the return port.

[0111] 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 direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0112] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0113] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A heat exchange cell, characterized in that, include: A heat exchange body has a heat exchange channel and two connecting holes. The heat exchange channel extends along the length direction of the heat exchange body, and the two connecting holes are respectively formed at both ends of the length direction of the heat exchange body. The connecting holes penetrate the heat exchange body along the thickness direction of the heat exchange body and communicate with the heat exchange channel. Two connecting pipes are provided, each surrounding one of the two connecting holes. The connecting pipes extend outward from the side of the heat exchange body along the thickness direction of the heat exchange body. A connecting channel is formed inside the connecting pipe, and the connecting channel communicates with the connecting hole. The connecting pipe and the heat exchange body are an integral structure.

2. The heat exchange unit according to claim 1, characterized in that, The inner surface of the connecting tube is flush with the inner surface of the connecting hole.

3. The heat exchange unit according to claim 2, characterized in that, Along the length of the heat exchange body, the heat exchange channel extends through both end faces of the heat exchange body, and the heat exchange body is provided with a first sealing member for sealing both ends of the heat exchange channel.

4. The heat exchange unit according to claim 3, characterized in that, The outer diameter R1 of the connecting pipe and the width W1 of the heat exchange body satisfy the condition: R1 < W1.

5. The heat exchange unit according to claim 1, characterized in that, The dimension L1 of the heat exchange channel in the thickness direction of the heat exchange body satisfies: 0.2mm≤L1≤0.4; and / or, the dimension L2 of the heat exchange channel in the width direction of the heat exchange body satisfies: L2≤7mm.

6. The heat exchange unit according to claim 1, characterized in that, The heat exchange channels are arranged in multiple intervals along the width direction of the heat exchange body, and all of the multiple heat exchange channels are connected to the connection holes.

7. The heat exchange unit according to claim 6, characterized in that, The spacing L3 between two adjacent heat exchange channels satisfies: 0.1mm≤L3≤0.4mm.

8. The heat exchange unit according to claim 6, characterized in that, The projection of the connecting hole onto the reference surface is the first projection, and the projection of the heat exchange channel onto the reference surface is the second projection. The reference surface is perpendicular to the length direction of the heat exchange body, and the second projection is located within the first projection.

9. The heat exchange unit according to claim 1, characterized in that, The width W1 of the heat exchange body satisfies: W1≤7mm; and / or the thickness H1 of the heat exchange body satisfies: H1≤0.8mm.

10. The heat exchange unit according to claim 1, characterized in that, It also includes two heat exchange fins, which are respectively disposed on opposite sides of the heat exchange body in the width direction.

11. The heat exchange unit according to claim 10, characterized in that, The heat exchange fins are integral with the heat exchange body; and / or, the dimension W2 of the heat exchange fins in the width direction of the heat exchange body satisfies: W2≤7mm.

12. The heat exchange unit according to claim 10, characterized in that, The two heat exchange fins are a first fin and a second fin. In the direction from the first fin to the second fin, the thickness of the first fin remains constant and is less than the thickness of the heat exchange body, while the thickness of the second fin gradually decreases.

13. The heat exchange unit according to claim 12, characterized in that, The dimension H2 of the first fin in the thickness direction of the heat exchange body satisfies: H2≤0.4mm.

14. A heat exchanger, characterized in that, include: The heat exchanger unit is connected in sequence multiple times. The heat exchanger unit is the heat exchanger unit according to any one of claims 1-13. The two connecting pipes of the heat exchanger unit are respectively a first connecting pipe and a second connecting pipe. The plurality of first connecting pipes are connected in sequence to form a first manifold, and the plurality of second connecting pipes are connected in sequence to form a second manifold.

15. The heat exchanger according to claim 14, characterized in that, The two ends of the connecting pipe are respectively provided with a first connecting structure and a second connecting structure. The connecting pipe of the heat exchange unit is connected to the second connecting structure of the connecting pipe of the adjacent heat exchange unit through the first connecting structure. or The heat exchanger body has a first side and a second side on opposite sides in the thickness direction. The connecting pipe extends outward from the first side. A first connecting structure is formed at the end of the connecting pipe away from the heat exchanger body. A second connecting structure corresponding to the first connecting structure is formed on the second side.

16. The heat exchanger according to claim 15, characterized in that, The first connecting structure is formed as a positioning protrusion, and the second connecting structure is formed as a positioning groove.

17. The heat exchanger according to claim 15, characterized in that, The first connecting structure has a first positioning surface, and the second connecting structure has a second positioning surface adapted to mate with the first positioning surface; wherein... Both the first positioning surface and the second positioning surface are stepped surfaces; Alternatively, in the direction from the first connecting structure to the second connecting structure, both the first positioning surface and the second positioning surface extend obliquely toward or away from the central axis of the connecting pipe.

18. The heat exchanger according to claim 14, characterized in that, The length direction of the heat exchange unit is vertical; and / or, two adjacent heat exchange units are welded together.

19. The heat exchanger according to claim 14, characterized in that, The first manifold has a first port and a second port at its two ends, and the second manifold has a third port and a fourth port at its two ends, with a second sealing element provided on two of the first port, the second port, the third port and the fourth port.

20. An air conditioner, characterized in that, Includes the heat exchanger according to any one of claims 14-19.

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