An air conditioner

Abstract

This invention relates to an air conditioner. The air conditioner includes: a heat exchanger, comprising a first side plate and a heat exchange tube penetrating the first side plate, wherein the first side plate is disposed on a first side of the heat exchanger, and a second side of the heat exchanger is used to connect inlet and outlet pipes; and an air duct assembly, comprising an air duct shell, the air duct shell being connected to the heat exchanger to form a cavity, the air duct shell including a sealing rib, the first edge of the sealing rib being connected to the first side plate, enclosing the first end of the heat exchange tube inside the cavity. This invention, by fixing the first edge of the sealing rib of the air duct shell to the first side plate of the heat exchanger on the first side, and enclosing the first end of the heat exchange tube inside the cavity formed by the air duct shell and the heat exchanger, reduces heat exchange loss between the heat exchange tube and the external environment, and improves heat exchange efficiency.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and more particularly to an air conditioner. Background Technology

[0002] Currently, air conditioners typically consist of major components such as compressors, heat exchangers, and air ducts. The heat exchanger is fixed to the air duct housing by side plates on both sides. Specifically, the air duct housing is tightly sealed to the side plates on both sides of the evaporator, forming a closed cavity to prevent air leakage from affecting heat exchange efficiency.

[0003] Because of the same air duct structure, different cooling capacity systems are usually derived to meet different customer needs. For example, evaporators have two-row and three-row copper tube structures.

[0004] When different cooling systems are derived from the same duct structure, the side plates on both sides of the evaporator need to be remade according to the current duct sealing structure, resulting in poor versatility, high overall mold opening cost, and the evaporator copper tube U-bend exposed to the external environment, leading to heat exchange loss. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an air conditioner.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] According to a first aspect of the present invention, an air conditioner is provided, a heat exchanger including a first side plate and a heat exchange tube penetrating the first side plate, wherein the first side plate is disposed on a first side of the heat exchanger and a second side of the heat exchanger is used to connect inlet and outlet pipes; and an air duct assembly including an air duct housing connected to the heat exchanger to form a cavity, the air duct housing including a sealing rib, the first edge of the sealing rib being connected to the first side plate to enclose a first end of the heat exchange tube inside the cavity.

[0008] In some embodiments, the first edge of the sealing rib forms a bend; the bend is connected to the first side plate, wrapping the first end of the heat exchange tube inside the cavity.

[0009] In some embodiments, the heat exchanger includes a first side plate and two or more rows of heat exchange tubes arranged from the outside to the inside of the cavity, wherein the first end of the heat exchange tube located in the outermost row penetrates the first side plate.

[0010] In some embodiments, the second edge of the sealing rib is formed with a connecting portion; the heat exchanger further includes a second side plate, the second ends of two or more rows of heat exchange tubes are all inserted through the second side plate, and the second side plate is fixedly connected to the connecting portion.

[0011] In some embodiments, the heat exchange tubes are arranged in three rows, which are arranged sequentially from the outside to the inside of the cavity as a first outer heat exchange tube, a middle heat exchange tube, and a first inner heat exchange tube. The first end of the first outer heat exchange tube passes through the first side plate, the first end of the middle heat exchange tube and the first end of the first inner heat exchange tube are both located outside the first side plate, and the second end of the first outer heat exchange tube, the second end of the middle heat exchange tube and the second end of the first inner heat exchange tube all pass through the second side plate.

[0012] In some embodiments, the heat exchange tubes are provided in two rows, namely a second outer heat exchange tube and a second inner heat exchange tube from the outside to the inside of the cavity. The first end of the second outer heat exchange tube passes through the first side plate, the first end of the second inner heat exchange tube is located outside the first side plate, and the second end of the second outer heat exchange tube and the second end of the second inner heat exchange tube both pass through the second side plate.

[0013] In some embodiments, the heat exchange tube is formed as a bent windward surface or a linear windward surface.

[0014] In some embodiments, the duct housing includes a first duct base, a duct outer shell, and a duct top cover. The duct outer shell is disposed on the duct base, the sealing rib is formed on the duct outer shell, the duct top cover is disposed on the duct outer shell, and the duct outlet is provided on the duct outer shell. The duct base, the duct outer shell, the duct top cover, and the heat exchanger form an upper cavity.

[0015] In some embodiments, the air duct assembly further includes a motor mounted on the first air duct base and a first fan blade connected to the output shaft of the motor, the first fan blade being located inside the air duct housing.

[0016] In some embodiments, the duct housing further includes a second duct base installed below the first duct base, a cavity is formed between the first duct base and the second duct base, and the second duct base is provided with an air outlet; the duct assembly further includes a second fan blade installed on the motor output shaft, the second fan blade being located in the lower cavity, wherein the second fan blade and the first fan blade are respectively located on the upper and lower sides of the motor.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0018] The present invention fixes the first edge of the sealing rib of the air duct shell to the first side plate of the first side of the heat exchanger, and wraps the first end of the heat exchange tube inside the cavity formed by the air duct shell and the heat exchanger, thereby reducing the heat exchange loss between the heat exchange tube and the external environment and improving the heat exchange efficiency.

[0019] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0021] Figure 1 This is a schematic diagram of an air conditioner structure (three rows of heat exchange tubes) in related technologies;

[0022] Figure 2 This is a schematic diagram of another air conditioner structure in related technologies (two rows of heat exchange tubes in the heat exchanger);

[0023] Figure 3 This is a schematic diagram of an air conditioner structure according to an exemplary embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of an air conditioner from another perspective, according to an exemplary embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of an air conditioner duct assembly structure according to an exemplary embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the air duct housing structure of an air conditioner according to an exemplary embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of an air conditioner structure according to another exemplary embodiment of the present invention;

[0028] Icon labels:

[0029] 10. Air duct shell, 11. First air duct base, 12. Air duct outer shell, 13. Sealing rib, 14. Air duct top cover, 15. First air duct base, 101. Air duct inlet, 102. Bending part, 131. Connecting part, 132.

[0030] Motor 21, first fan blade 22, second fan blade 23;

[0031] Heat exchanger 30, first side plate 31, second side plate 32, first external heat exchange tube 33, middle heat exchange tube 34, first internal heat exchange tube 35, second external heat exchange tube 36, second internal heat exchange tube 37, right side plate 301, outer left side plate 302, inner left side plate 303;

[0032] Cavity C, interior C1, exterior C2;

[0033] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0034] In the description of this invention, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 limiting this invention.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "contact," and "communication" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In related technologies, such as Figure 1 and Figure 2 As shown, the air conditioner includes a duct housing 200 and a heat exchanger 300 connected around the duct housing 200. Specifically, Figure 1 The diagram shows a heat exchanger 300 comprising three rows of heat exchange tubes: an outer row of heat exchange tubes 304, a middle row of heat exchange tubes 305, and an inner row of heat exchange tubes 306. A right side plate 301 is provided at the right end of the heat exchanger 300 for the right ends of the three heat exchange tubes to pass through. Two left side plates are provided at the left end of the heat exchanger 300: an outer left side plate 302 and an inner left side plate 303. The left end of the outermost row of heat exchange tubes 304 passes through the outer left side plate 302, and the left end of the innermost row of heat exchange tubes 306 passes through the innermost left side plate 303. The right side plate 301 is used to fix the left end 201 of the sealing rib of the duct housing, the innermost inner left side plate 303 is used to fix the right end 202 of the sealing rib, and the outermost outer left side plate 302 is used to fix the duct housing 200.

[0037] When the indoor unit needs to be changed to a different cooling / heating system, the number of copper tubes in the heat exchanger needs to be changed, for example, from three rows of heat exchange tubes to two rows. Figure 1 and Figure 2 As shown, the inventor discovered the cancellation Figure 1 The innermost row of heat exchange tubes in the three-row heat exchange system is eliminated, i.e., the inner row heat exchange tube 306 and its corresponding innermost fins are removed. This has the following advantages: (1) The left side plate of the outer row (outer left side plate 302) needs to be fixed with the air duct shell 200, and its position is inconvenient to adjust; (2) The height of the outer row heat exchange tube 304 and the middle row heat exchange tube 305 are different, and the hole of the outer left side plate 302 cannot be matched with the middle row heat exchange tube 305, resulting in the outer left side plate being unusable; (3) When the evaporator is L-shaped, the outermost row of heat exchange tubes is the longest, and the performance impact of eliminating the outer row heat exchange tubes is greater than that of eliminating the inner row; (4) Eliminating the inner row heat exchange tubes will increase the ventilation area of ​​the sealed cavity, which is beneficial to increasing the air volume. Therefore, the scheme of eliminating the inner row heat exchange tubes is adopted to change the three rows of heat exchange tubes into two rows of heat exchange tubes.

[0038] From the above analysis, it can be seen that, Figure 2 As shown, the three rows of heat exchange tubes are changed to two rows. Since the innermost row of heat exchange tubes is eliminated, the right-side plate 301 can no longer be reused because... Figure 1 The right side plate 301 has internal heat exchanger tube holes. If the two-row heat exchanger tube scheme ( Figure 2 Continue to use the three rows of heat exchange tubes. Figure 1 This will cause air leakage and affect the ventilation effect. Therefore, the right side panel 301' needs to be reopened. The outermost left side panel 302 can be reused without reopening, however, the innermost left side panel 303' needs to be fixed to the right end 202 of the reinforcing rib of the air duct shell. Figure 1 The inner left side panel 303 cannot be used, therefore Figure 2 The inner left side panel 303' needs to be reopened.

[0039] Therefore, it is evident that the indoor unit in related technologies requires modifications to the cooling / heating section system. For example, changing from a three-row heat exchanger to a two-row heat exchanger requires five side plates. Figure 1 The right side panel 301, the outer left side panel 302, the inner left side panel 303, and Figure 2 The right side panel 301' and the inner left side panel 303' are shown in the middle. It can be seen that the versatility is poor and the overall mold opening cost is high.

[0040] also, Figure 1 and Figure 2 As shown, the inventors also discovered that, regardless of whether it is a heat exchanger with three rows of heat exchange tubes or a heat exchanger with two rows of heat exchange tubes, the U-shaped bend at the left end of the heat exchange tube is exposed outside the air duct sealing cavity, exchanging heat with the external environment, resulting in heat loss.

[0041] In view of the above problems, the present invention provides an air conditioner that can reduce the number of heat exchanger side plates, meet the system configuration requirements of different cooling capacity sections, and improve heat exchange efficiency.

[0042] like Figures 3-7 As shown, the air conditioner of the present invention includes an air duct assembly and a heat exchanger 30.

[0043] The air duct assembly includes an air duct housing 10, which has an air duct inlet 101 and an air duct outlet 102. A heat exchanger 30 is located at the air duct inlet 101 and connected to the air duct housing 10, forming a cavity C. The rotation of the fan blades in the fan assembly generates a negative pressure in the cavity C, drawing in external air from the air duct inlet 101. After heat exchange in the heat exchanger 30, the cold / hot air is discharged from the air duct outlet 102.

[0044] Heat exchanger 30 includes a first side plate 31 (left side plate in the figure) and two or more rows of heat exchange tubes. The two or more rows of heat exchange tubes are fixed by fins and extend from the outside C2 of cavity C to the inside C1 (e.g., Figure 4 As shown in the diagram, the direction from the outside C2 to the inside C1 of the cavity C is also the thickness direction of the heat exchanger 30. The first end (left end in the diagram) of the outermost heat exchange tube 33 passes through the first side plate 31, which is fixed to the air duct housing 10. The first end (left end) of the outermost heat exchange tube 33 is located inside the cavity C. The first end can be a U-shaped bend on the heat exchange tube.

[0045] Specifically, the heat exchanger 30 includes multiple rows of heat exchange tubes connected by fins. The left end of the outermost row of heat exchange tubes passes through a first side plate 31. Understandably, in one example, the left end of the heat exchange tubes is connected to multiple U-shaped bends, which extend out from the first side plate 31. In other words, the first side plate 31 is used to support and fix the outermost row of heat exchange tubes. The outermost side plate 31 is connected to the duct housing 10. In the related art described above, the innermost left side plate 303 of the heat exchanger 300 is connected to the duct housing 10, which would require re-fabricating the inner left side plate 303 when the number of copper tubes in the heat exchanger needs to be changed. The first side plate 31 of this invention is located on the outermost side and is connected to the air duct shell 10. When it is necessary to change the number of copper tubes in the heat exchanger, since the first side plate 31 is located on the outermost side, there is no need to re-install the first side plate 31; it can be directly reused. Therefore, while taking into account the system configuration requirements of different cooling capacity sections, the number of heat exchanger side plates can be reduced, improving installation efficiency and reducing costs. In addition, the first end of the heat exchange tube is located inside the cavity C, that is, multiple U-shaped bends are located inside the cavity C. This reduces the loss of heat / cooling with the external environment and improves the cooling / heating efficiency.

[0046] In some embodiments, such as Figure 3 and Figure 6 As shown, the above-mentioned air duct housing 10 also includes a sealing rib 13. In the following description, the sealing rib can also be referred to as a sealing plate 13. The first edge (left edge) of the sealing rib 13 has a bent portion 131. The bent portion 131 is fixedly connected to the first side plate 31 and wraps the outermost heat exchange tube inside the cavity C.

[0047] The bending portion 131 is formed by bending from the left edge of the first side plate 31 toward the heat exchanger 30. The first side plate 31 is L-shaped and includes a first surface and a second surface. The first surface is provided with pipe holes corresponding to the outermost row of heat exchange tubes. The second surface is bent toward the sealing rib 13 and stacked and fixed together with the bending portion 131, thereby wrapping the U-shaped bend at the left end of the heat exchanger 30 inside the cavity C1, reducing the loss of cold / heat with the external environment and improving the cooling / heating efficiency.

[0048] Furthermore, a connecting portion 132 is formed on the second edge (right edge) of the sealing rib 13; the heat exchanger 30 also includes a second side plate 32, through which the second ends (right ends) of two or more rows of heat exchange tubes pass, and the second side plate 32 is fixedly connected to the connecting portion 132. Inlet and outlet pipes can be connected to the second end (right end) of the heat exchange tubes to connect the compressor and the outdoor heat exchanger.

[0049] The heat exchanger 30 of the present invention may have heat exchange tubes formed in a bent air-facing direction, that is, the entire heat exchanger is bent, such as an L-shaped, U-shaped, V-shaped, arc-shaped, or multi-bent shape. In other embodiments, the heat exchange tubes of the heat exchanger 30 form a linear air-facing direction, that is, the entire heat exchanger is in a straight line shape, such as a straight line or an inclined straight line. The following description uses an L-shaped heat exchanger as an example, but the present invention is not limited thereto.

[0050] In some examples, the heat exchanger contains three rows of heat exchange tubes. Specifically, such as... Figure 3 and Figure 4As shown, the heat exchange tubes are arranged in three rows, from the outside C2 to the inside C1 of the cavity C, namely the first outer heat exchange tube 33, the middle heat exchange tube 34, and the first inner heat exchange tube 35. The first outer heat exchange tube 33, the middle heat exchange tube 34, and the first inner heat exchange tube 35 are fixed together by fins. The first end (left end) of the first outer heat exchange tube 33 passes through the first side plate 31. The first end (left end) of the middle heat exchange tube 34 and the first end (left end) of the first inner heat exchange tube 35 are both located outside the first side plate 31. In other words, the first end (left end) of the middle heat exchange tube 34 and the first end (left end) of the first inner heat exchange tube 35 do not pass through the first side plate 31. The second end (right end) of the first outer heat exchange tube 33, the second end (right end) of the middle heat exchange tube 34, and the second end (right end) of the first inner heat exchange tube 35 all pass through the second side plate 32. The first side plate 31 is fixedly connected to the bent portion 131 of the sealing rib 13, and the bent portion 131 of the sealing rib 13 wraps the U-shaped bend of the first end of the three rows of heat exchange tubes inside the cavity C. The second side plate 32 is fixed to the air duct shell 10 and is fixedly connected to the connecting portion 132 of the sealing rib 13. The first side plate 31 and the second side plate 32 provide support and fixation for the entire heat exchanger 30.

[0051] The air conditioner with a heat exchanger 30 having three rows of heat exchange tubes of the present invention only needs to have two side plates, namely the first side plate 31 and the second side plate 32. Compared with the air conditioner with a heat exchanger having three rows of heat exchange tubes in the related art, which requires three side plates, namely the right side plate 301, the outer left side plate 302 and the inner left side plate 303, one side plate is reduced, the cost is reduced, and the loss of cold / heat to the external environment is reduced, thus improving the cooling / heating efficiency.

[0052] In other examples, when the indoor unit needs to be configured for different cooling / heating stages, the number of copper tubes in the heat exchanger needs to be changed, for example, from three rows of heat exchange tubes to two rows. As the inventors have discovered, the optimal approach is to eliminate the innermost row of heat exchange tubes. Specifically, as shown... Figure 7 As shown, the heat exchanger includes three rows of heat exchange tubes. There are two rows of heat exchange tubes, arranged sequentially from the outside C2 to the inside C1 of the cavity C: a second outer row of heat exchange tubes 36 and a second inner row of heat exchange tubes 37. The first end (left end) of the second outer row of heat exchange tubes 36 passes through the first side plate 31, while the first end (left end) of the second inner row of heat exchange tubes 37 is located outside the first side plate 31. In other words, the first end (left end) of the second inner row of heat exchange tubes 37 does not pass through the first side plate 31. The second ends (right ends) of both the second outer row of heat exchange tubes 36 and the second inner row of heat exchange tubes 37 pass through the second side plate 32'. The first side plate 31 is fixedly connected to the bent portion 131 of the sealing rib 13, and the bent portion 131 of the sealing rib 13 wraps the U-shaped bends of the first ends of the three rows of heat exchange tubes inside the cavity C. The second side plate 32' is fixed to the air duct housing 10 and is also fixedly connected to the connecting portion 132 of the sealing rib 13.

[0053] The air conditioner of the present invention with a heat exchanger 30 having two rows of heat exchange tubes only requires an additional side plate, namely a second side plate 32', on the basis of a heat exchanger 30 with three rows of heat exchange tubes. The first side plate 31 can be borrowed from the side plate in the heat exchanger 30 with three rows of heat exchange tubes, without the need for additional side plates. In other words, when changing from a heat exchanger 30 with three rows of heat exchange tubes to a heat exchanger 30 with two rows of heat exchange tubes, only three side plates are needed to meet the system configuration requirements of different cooling capacity sections. Compared with the related technology that requires five side plates, this significantly reduces costs and improves assembly efficiency. Furthermore, in the air conditioner of the present invention, whether the heat exchanger has three rows of heat exchange tubes or two rows of heat exchange tubes, the U-shaped bend at the left end of the heat exchange tubes is wrapped inside the cavity, reducing heat loss from the external environment and improving heat exchange efficiency.

[0054] In some embodiments, the duct housing 10 includes a first duct base 11, a duct outer shell 12 (volute), and a duct top cover 14 (sealing cover). The duct outer shell 12 is disposed on the duct base 11, a sealing rib 13 is formed on the duct outer shell 12, and the duct top cover 14 is disposed on the duct outer shell 12. A duct outlet 102 is provided on the duct outer shell 12. The duct base 11, the duct outer shell 12, the duct top cover 14, and the heat exchanger 30 form a cavity C.

[0055] In some embodiments, the air duct assembly further includes a motor 21 mounted on a first air duct base 11 and a first fan blade 22 connected to the motor output shaft, the first fan blade 22 being located inside the air duct housing 12.

[0056] In some embodiments, the air duct housing 10 further includes a second air duct base 15 installed below the first air duct base 11, forming an accommodating space between the first air duct base 11 and the second air duct base 15, and the second air duct base 11 is provided with an air outlet; the air duct assembly further includes a second fan blade 23 installed on the motor output shaft, the second fan blade 23 being located within the accommodating space, wherein the second fan blade 23 and the first fan blade 22 are located on the upper and lower sides of the motor 21 respectively.

[0057] It is worth noting that although the present invention illustrates the structure of the air duct assembly by using a single motor to drive two fan blades, in other embodiments where necessary, two motors can also be used to drive the fan blades to rotate separately.

[0058] In addition, the sealing structures such as the sealing rib 13 and the air duct cover 14 in the above embodiments can be made of various sealing materials, such as plastic, foam, etc. The present invention does not limit the material of each component of the air duct shell.

[0059] In related technologies, the U-shaped bend of the heat exchanger is outside the sealed cavity (body) and exchanges heat with the air outside the sealed cavity, resulting in heat loss. In this invention, the first end (U-shaped bend) of the heat exchanger is inside the cavity, and there is no heat loss at the U-shaped bend. As shown in Table 1, after verification and comparison, the solution of this invention can improve energy efficiency by approximately 1%.

[0060] Table 1: Comparison of Energy Efficiency Improvements Between Related Technical Solutions and the Technical Solution of This Invention

[0061]

[0062] The air conditioner of the present invention can be a wall-mounted air conditioner, a floor-standing air conditioner, a window air conditioner, or a portable air conditioner, etc.

[0063] The air conditioner of the present invention can reduce the number of heat exchanger side plates, and can also take into account the system configuration requirements of different cooling capacity sections, reduce costs, improve installation efficiency, reduce heat exchange loss, and improve heat exchange efficiency.

[0064] It can be further understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0065] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0066] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0067] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0068] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An air conditioner, characterized in that, include: A heat exchanger, the heat exchanger including a first side plate and a heat exchange tube passing through the first side plate, wherein the first side plate is disposed on a first side of the heat exchanger, and the second side of the heat exchanger is used to connect refrigerant inlet and outlet pipes. A duct assembly, the duct assembly including a duct shell, the duct shell being connected to the heat exchanger to form a cavity, the duct shell including a sealing plate, the first edge of the sealing plate being connected to the outer side of the first side plate, and the first connector of the heat exchange tube being accommodated inside the cavity; The heat exchanger includes two or more rows of heat exchange tubes, which are arranged from the outside to the inside of the cavity, wherein only the first end of the heat exchange tube in the outermost row penetrates the first side plate.

2. The air conditioner according to claim 1, characterized in that, The first edge of the sealing plate forms a bent portion; The bent portion is connected to the outer side of the first side plate, and the bent portion wraps around the first connector of the heat exchange tube.

3. The air conditioner according to claim 2, characterized in that, A connecting portion is formed on the second edge of the sealing plate; The heat exchanger also includes a second side plate disposed on the second side of the heat exchanger, and the second ends of the two or more rows of heat exchange tubes are all inserted through the second side plate, and the second side plate is fixedly connected to the connecting part.

4. The air conditioner according to claim 3, characterized in that, The heat exchange tubes are arranged in three rows, from the outside of the cavity to the inside, namely the first outer heat exchange tube, the middle heat exchange tube and the first inner heat exchange tube. The first end of the first outer heat exchange tube passes through the first side plate. The first ends of the middle heat exchange tube and the first inner heat exchange tube are both located outside the first side plate. The second ends of the first outer heat exchange tube, the middle heat exchange tube and the first inner heat exchange tube all pass through the second side plate.

5. The air conditioner according to claim 3, characterized in that, The heat exchange tubes are arranged in two rows, with the second outer heat exchange tube and the second inner heat exchange tube arranged sequentially from the outside to the inside of the cavity. The first end of the second outer heat exchange tube passes through the first side plate, the first end of the second inner heat exchange tube is located outside the first side plate, and the second ends of the second outer heat exchange tube and the second inner heat exchange tube both pass through the second side plate.

6. The air conditioner according to any one of claims 1-5, characterized in that, The heat exchange tube is formed as a bent windward surface or a linear windward surface.

7. The air conditioner according to any one of claims 1-5, characterized in that, The air duct housing includes a first air duct base, an air duct outer shell, and an air duct top cover. The air duct outer shell is disposed on the air duct base, the sealing plate is formed on the air duct outer shell, the air duct top cover is disposed on the air duct outer shell, and an air duct outlet is provided on the air duct outer shell. The air duct base, the air duct outer shell, the air duct top cover, and the heat exchanger form an upper cavity.

8. The air conditioner according to claim 7, characterized in that, The air duct assembly also includes a motor mounted on the first air duct base and a first fan blade connected to the output shaft of the motor, the first fan blade being located inside the air duct housing.

9. The air conditioner according to claim 8, characterized in that, The air duct housing also includes a second air duct base installed below the first air duct base, a lower cavity is formed between the first air duct base and the second air duct base, and the second air duct base is provided with an air inlet. The air duct assembly also includes a second fan blade mounted on the motor output shaft. The second fan blade is located in the lower cavity, wherein the second fan blade and the first fan blade are located on the upper and lower sides of the motor, respectively.

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