Air conditioner

Abstract

The invention discloses an air conditioner, relates to the technical field of refrigeration equipment, and aims to solve the problems that a split-assembled multi-folding heat exchanger in the air conditioner is inconvenient to mount and the heat exchange efficiency is influenced at a splicing part. A refrigerant heat exchanger of the air conditioner comprises a refrigerant pipe and a plurality of fins, the fins are of an integrated plane sheet structure, the fins are arranged at intervals in the first linear direction, and the refrigerant pipe penetrates through the fins in the first linear direction and is in contact connection with the fins. Each fin comprises a first connecting piece, a second connecting piece, a third connecting piece and a fourth connecting piece which are sequentially connected in the second straight line direction. In the third straight line direction, the angle formed by the second connecting piece and the third connecting piece faces towards one side to be opened, and the angle formed by the first connecting piece and the second connecting piece and the angle formed by the third connecting piece and the fourth connecting piece face towards the other side to be opened. The air conditioner is used for simplifying the structure of the refrigerant heat exchanger and improving the heat exchange efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to an air conditioner. Background Art

[0002] At present, the heat exchanger fins commonly used in the indoor unit heat exchanger of the air conditioner are mostly equal-width rectangular structures or rectangular structures with some special-shaped structures at both ends, and the pipeline flow paths on the heat exchanger fins are also evenly arranged according to the width of the fins.

[0003] Since the air delivered by the fan of the indoor unit is generally non-uniform, and in order to reduce the installation space occupied by the indoor unit and increase the heat flux density, in indoor units such as duct units, multiple flat-plate heat exchangers can be spliced ​​to form single-fold or multi-fold heat exchangers with special-shaped structures such as V-shaped, Z-shaped or W-shaped.

[0004] Since there are gaps and splicing plates for connection at the joints of the folded heat exchanger, especially the W-shaped multi-fold heat exchanger, there are at least three splicing gaps. On the one hand, the gaps at the splicing cannot be used to install refrigerant pipes, which will reduce the heat exchange efficiency between the heat exchanger and the air. On the other hand, the combined installation steps of the split multi-fold heat exchanger formed by splicing are cumbersome. Summary of the invention

[0005] The object of the present invention is to provide an air conditioner, aiming to solve the problems of inconvenient installation and influence of heat exchange efficiency at joints of a split-assembly multi-fold heat exchanger in the air conditioner.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] The present invention provides an air conditioner, which includes a housing, a fan assembly and a refrigerant heat exchanger, wherein the fan assembly is installed in the housing, the refrigerant heat exchanger is located in the housing, and the fan assembly is used to drive air to flow through the refrigerant heat exchanger. The refrigerant heat exchanger includes a refrigerant tube and a plurality of fins, the fins are an integrated planar sheet structure, the plurality of fins are arranged at intervals along a first straight line direction, and the refrigerant tube passes through the plurality of fins along the first straight line direction and is in contact with and connected to the plurality of fins. The fins include a first connecting piece, a second connecting piece, a third connecting piece and a fourth connecting piece connected in sequence along a second straight line direction, and the second straight line direction intersects with the first straight line direction. Along the third straight line direction, the angle formed by the second connecting piece and the third connecting piece opens toward one side, and the angle formed by the first connecting piece and the second connecting piece and the angle formed by the third connecting piece and the fourth connecting piece open toward the other side, and the third straight line direction is perpendicular to the first straight line direction and the second straight line direction.

[0008] In this way, in the air conditioner, the fan assembly can drive the air near the shell to continuously flow through the refrigerant heat exchanger, and the refrigerant circulating in the refrigerant heat exchanger can heat or cool the air flowing through the refrigerant heat exchanger. Based on this, the multiple fins of the integrated sheet structure distributed at intervals along the first straight line direction can be in contact and connected with the refrigerant pipe set through, so that the multiple fins distributed at intervals increase the contact area between the refrigerant pipe and the air in the refrigerant heat exchanger. Since each fin is connected by bending the first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece to form an integrated and three-fold sheet structure, it is convenient to open a hole to install the refrigerant pipe, and connect multiple fins with multiple refrigerant pipes to form a refrigerant heat exchanger with an integrated structure. While the refrigerant pipe is covered on the fin without dead angles, the complicated operation in the assembly and splicing process of the split-multi-fold structure heat exchanger can be avoided. Furthermore, in a shell with limited height, a refrigerant heat exchanger made of tri-fold fins can greatly increase the installation size of the refrigerant heat exchanger, which is beneficial to increase the heat exchange area of ​​the refrigerant heat exchanger, thereby improving the heat exchange efficiency of the air conditioner.

[0009] In some embodiments, the fin has an air inlet contour line and an air outlet contour line, the air inlet contour line and the air outlet contour line are two edges of the fin that are arranged opposite to each other in the third straight line direction, and the inner edge of the angle formed by the first connecting piece and the second connecting piece is a part of the air inlet contour line. The air inlet contour line and the air outlet contour line have the same shape and size, and the air inlet contour line and the air outlet contour line have the same spacing in the third straight line direction.

[0010] In some embodiments, the fin further has a first edge line and a second edge line. Along the second straight line direction, two oppositely disposed edges of the fin are the first edge line and the second edge line. The first edge line is a side edge of the first connecting piece away from the second connecting piece, and the second edge line is a side edge of the fourth connecting piece away from the third connecting piece. Along the second straight line direction, the air inlet contour line and the air outlet contour line are located between the ends of the first connecting piece and are connected with the first edge line, and the air inlet contour line and the air outlet contour line are located between the ends of the fourth connecting piece and are connected with the second edge line. The first edge line is arranged parallel to the second edge line and extends along the third straight line direction.

[0011] In some embodiments, a first angle formed by an edge of the air inlet contour line at the first connecting piece and the direction of the third straight line ranges from 110° to 150°.

[0012] In some embodiments, a second angle formed by an edge of the air inlet contour line at the fourth connecting piece and the direction of the third straight line has a value ranging from 110° to 150°.

[0013] In some embodiments, a third angle formed between an edge of the air inlet contour line at the first connecting piece and an edge of the air inlet contour line at the fourth connecting piece has a value ranging from 80° to 110°.

[0014] In some embodiments, the fin further includes a fifth connecting piece, a sixth connecting piece, and a seventh connecting piece. The first connecting piece is connected to the second connecting piece through the fifth connecting piece. Along the second straight line direction, the sixth connecting piece is located between the second connecting piece and the third connecting piece, one end of the sixth connecting piece is connected to an end of the second connecting piece away from the fifth connecting piece, and the other end of the sixth connecting piece is connected and installed with the third connecting piece. The third connecting piece is also connected and installed with the fourth connecting piece through the seventh connecting piece.

[0015] In some embodiments, each fin is provided with at least one row of mounting holes, and when the fin includes an air inlet contour line and an air outlet contour line, in the first connecting piece, the second connecting piece, the third connecting piece, the fourth connecting piece, the fifth connecting piece, and the seventh connecting piece, a plurality of mounting holes in a row are arranged on the fin at intervals along the extension direction of the air inlet contour line. On the sixth connecting piece, along the third straight line direction, some mounting holes in a row are offset and arranged close to the air outlet contour line, so that the angle formed by the center connecting line of at least three mounting holes on the sixth connecting piece is opened toward the direction where the air inlet contour line is located. A plurality of fins are arranged at intervals along the first straight line direction, and the mounting holes on any two fins are arranged in alignment along the first straight line direction. The number of refrigerant pipes is a plurality and is less than or equal to the number of mounting holes on one fin. A refrigerant pipe extends along the first straight line direction and is inserted into the plurality of aligned mounting holes.

[0016] In some embodiments, in a plurality of mounting holes in a row, the center distances of two adjacent mounting holes are the same and are both L. Along the third straight line direction, the maximum distance between the edge of the sixth connecting piece corresponding to the air inlet contour line and the edge of the first connecting piece or the second connecting piece corresponding to the air inlet contour line is T, and T≥L is satisfied.

[0017] In some embodiments, the edges of the fifth connecting piece, the sixth connecting piece, and the seventh connecting piece corresponding to the air inlet contour line are arranged parallel to the second straight line direction.

[0018] In some embodiments, along the third straight line direction, the edge of the sixth connecting piece corresponding to the air inlet contour line is recessed toward the side where the air outlet contour line is located, and the edge of the sixth connecting piece corresponding to the air outlet contour line is convex toward the side away from the air inlet contour line.

[0019] In some embodiments, when a plurality of mounting holes are provided on the fourth connecting plate, among the plurality of mounting holes in a row, at least one mounting hole located on the fourth connecting plate is not plugged with a refrigerant pipe.

[0020] In some embodiments, the fin is further provided with a plurality of crack portions to improve the contact heat exchange effect between the air and the fin. Among the plurality of mounting holes in a row, one or more crack portions are provided between two adjacent mounting holes, and the density of the crack portions on the fourth connecting sheet and / or the seventh connecting sheet is less than the density of the crack portions on the first connecting sheet.

[0021] In some embodiments, when the fin includes seven connecting plates, namely, a first connecting plate, a fifth connecting plate, a second connecting plate, a sixth connecting plate, a third connecting plate, a seventh connecting plate and a fourth connecting plate connected in sequence along a second straight line direction, the air inlet contour line between two adjacent connecting plates is connected by a rounded structure or a chamfered structure.

[0022] In some embodiments, along the second straight line direction, one end of the air inlet contour line close to the first edge line is bent through a rounded structure or a chamfered structure and then connected to the first edge line.

[0023] In some embodiments, along the second straight line direction, one end of the air inlet contour line close to the second edge line is bent through a rounded structure or a chamfered structure and then connected to the second edge line. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of a connection structure of an air conditioner provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A schematic diagram of a structure in which a gas-liquid separator and an oil separator are installed between the compressor and the four-way valve shown in FIG.

[0027] Figure 3 for Figure 1 A schematic diagram of a connection structure between a compressor and an outdoor heat exchanger and an indoor heat exchanger shown in ;

[0028] Figure 4 for Figure 1 A schematic diagram of a connection structure of a heat exchanger assembly shown in ;

[0029] Figure 5 A top view of an outdoor unit of an air conditioner provided in an example of the present application;

[0030] Figure 6A side sectional view of an indoor unit of an air conditioner provided in an example of the present application;

[0031] Figure 7 for Figure 6 A three-dimensional structural schematic diagram of a refrigerant heat exchanger shown in;

[0032] Figure 8 A side sectional view of an indoor unit of a first air conditioner in the related technical solution;

[0033] Fig. 9 A side sectional view of an indoor unit of a second air conditioner in the related technical solution;

[0034] Fig.10 It is a side view of a multi-fold heat exchanger in the related technical solution;

[0035] Fig.11 for Figure 7 A front view of a first type of fin in a refrigerant heat exchanger shown in ;

[0036] Fig.12 for Figure 7 A front view of a second type of fin in a refrigerant heat exchanger shown in ;

[0037] Fig.13 for Figure 7 A front view of a third type of fin in a refrigerant heat exchanger shown in ;

[0038] Fig.14 for Fig.13 A schematic diagram of a structure in which a plurality of fins are connected in sequence along the Z direction;

[0039] Fig.15 for Figure 7 A front view of a fourth type of fin in a refrigerant heat exchanger shown in ;

[0040] Fig.16 for Fig.15 A wind field simulation diagram of a refrigerant heat exchanger made of fins shown;

[0041] Fig.17 for Fig.16 A cross-sectional view at AA in the middle;

[0042] Fig.18 for Figure 7 A front view of a fifth type of fin in a refrigerant heat exchanger shown in ;

[0043] Fig.19 for Figure 7 A front view of a sixth type of fin in the refrigerant heat exchanger shown in ;

[0044] Fig. 20 for Fig.19A partial enlarged schematic diagram of the fin shown in ;

[0045] Fig.21 for Fig.17 A wind field simulation diagram of an improved duct fan corresponding to the angle shown. DETAILED DESCRIPTION

[0046] An embodiment of the present application provides an air conditioner, which is an air conditioner that can adjust and control parameters such as temperature, humidity, and circulation flow rate of ambient air in a building or structure.

[0047] like Figure 1 As shown, Figure 1 A schematic diagram of the connection structure of an air conditioner 100 provided in an embodiment of the present application. The air conditioner 100 may include a compressor 10, a four-way valve 20, a heat exchanger assembly 30 and a throttling device 40. Exemplarily, the four-way valve 20 may have a first port A, a second port B, a third port C and a fourth port D, the heat exchanger assembly 30 may include an outdoor heat exchanger 31 and an indoor heat exchanger 32, and the compressor 10 may have a return air port and an air outlet (not shown in the figure). The return air port of the compressor 10 may be connected to the first port A of the four-way valve, and the air outlet of the compressor 10 may be connected to the second port B of the four-way valve. The third port C of the four-way valve may be connected to one end of the outdoor heat exchanger 31, and the other end of the outdoor heat exchanger 31 may be connected to one end of the indoor heat exchanger 32 through the throttling device 40, and the other end of the indoor heat exchanger 32 may be connected to the fourth port D of the four-way valve.

[0048] The air conditioner 100 may include an indoor unit and an outdoor unit. The compressor 10, the four-way valve 20 and the outdoor heat exchanger 31 may be part of the outdoor unit, and the corresponding indoor heat exchanger 32 may be part of the indoor unit. The throttling device 40 may be a capillary structure or an electronic expansion valve structure. The throttling device 40 may be installed in the outdoor unit or in the indoor unit. The throttling device 40 may also be installed in the refrigerant pipeline between the outdoor unit and the indoor unit. The throttling device 40 only needs to be located between the indoor heat exchanger 32 and the outdoor heat exchanger 31 along the flow direction of the refrigerant.

[0049] Based on this, driven by the compressor 10, the refrigerant can circulate between the indoor unit and the outdoor unit and produce a reversible phase change. The refrigerant can release or absorb heat while producing a phase change. For example, the refrigerant can exchange heat with the surrounding medium (such as air) through the outdoor heat exchanger in the outdoor unit, thereby releasing heat to heat the surrounding air (or absorbing heat to cool the nearby air). The refrigerant can exchange heat with the surrounding air through the indoor heat exchanger in the indoor unit, thereby absorbing heat to cool the surrounding air (or releasing heat to heat the nearby air).

[0050] By setting the four-way valve 20, the operation mode of the air conditioner 100 can be flexibly adjusted between the heating and cooling conditions and the heating conditions, so that the air conditioner 100 can be applied to more usage scenarios. Figure 1 Taking the solid arrow shown in as an example, the four-way valve 20 can be adjusted to make the second port B and the third port C conductive, and the fourth port D and the first port A conductive. In this way, the refrigerant can circulate between the compressor 10, the second port B and the third port C of the four-way valve 20, the outdoor heat exchanger 31, the throttling device 40, the indoor heat exchanger 32, the fourth port D and the first port A of the four-way valve 20, and the compressor 10. In this process, the high-pressure gaseous refrigerant compressed by the compressor 10 can flow from the gas outlet through the four-way valve 20 to the outdoor heat exchanger 31, so that the high-temperature and high-pressure gaseous refrigerant can be liquefied at the outdoor heat exchanger 31 and release heat to heat the air near the outdoor heat exchanger 31. Subsequently, under the action of the throttling device 40, the pressure of the liquid refrigerant flowing into the indoor heat exchanger 32 is reduced, so that the liquid refrigerant can absorb heat and vaporize at the indoor heat exchanger 32, thereby cooling the air near the indoor heat exchanger 32 and realizing the exchange and transfer of heat between the outdoor heat exchanger 31 and the indoor heat exchanger 32. The vaporized refrigerant can be sucked into the return air port of the compressor 10 through the four-way valve 20, thereby realizing the circulation flow of the refrigerant.

[0051] When the air conditioner 100 is in the heating state, Figure 1 As an example, the four-way valve 20 can be adjusted to make the second port B and the fourth port D conductive, and the third port C and the first port A conductive. In this way, the refrigerant can circulate between the compressor 10, the second port B and the fourth port D of the four-way valve 20, the indoor heat exchanger 32, the throttling device 40, the outdoor heat exchanger 31, the third port C and the first port A of the four-way valve 20, and the compressor 10. In this process, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 10 can flow to the indoor heat exchanger 32 through the four-way valve 20, so that the high-temperature and high-pressure gaseous refrigerant can be liquefied at the indoor heat exchanger 32 and release heat to heat the air near the indoor heat exchanger 32. Subsequently, under the action of the throttling device 40, the pressure of the liquid refrigerant flowing into the outdoor heat exchanger 31 is reduced, so that the liquid refrigerant can absorb heat and vaporize at the outdoor heat exchanger 31, thereby cooling the air around the outdoor heat exchanger 31 and realizing the exchange and transfer of heat between the outdoor heat exchanger 31 and the indoor heat exchanger 32. The vaporized refrigerant can be sucked into the return air port of the compressor 10 through the four-way valve 20, thereby realizing the circulation flow of the refrigerant.

[0052] In order to prevent the gaseous refrigerant sucked into the compressor 10 through the air inlet of the compressor 10 from being mixed with liquid refrigerant or impurities, Figure 2As shown, the air conditioner 100 may further include a gas-liquid separator 50. The gas-liquid separator 50 may be installed between the first port A of the four-way valve 20 and the return air port of the compressor 10, so that the first port A may be connected and conducted with the return air port of the compressor 10 through the gas-liquid separator 50. In this way, when the gaseous refrigerant mixed with liquid refrigerant or lubricating oil flows to the return air port of the compressor 10 through the gas-liquid separator 50, the gas-liquid separator 50 may separate non-gaseous impurities (such as liquid refrigerant, liquid lubricating oil or other impurities) to prevent the above impurities from entering the compressor 10 and affecting the stable operation of the compressor 10.

[0053] In some other embodiments, continue to refer to Figure 2 The air conditioner 100 may further include an oil separator 60, and the air outlet of the compressor 10 and the second port B of the four-way valve 20 may also be connected and conducted through the oil separator 60. In this way, the lubricating oil mixed in the high-temperature and high-pressure gaseous refrigerant can be separated in the process of flowing through the oil separator 60, thereby preventing the lubricating oil from adhering to the inner walls of the outdoor heat exchanger 31 and the indoor heat exchanger 32 when the refrigerant flows through the outdoor heat exchanger 31 and the indoor heat exchanger 32, so that the indoor heat exchanger 32 and the outdoor heat exchanger 31 have a higher heat exchange efficiency.

[0054] In some other embodiments, it is also possible that a four-way valve is not required. Figure 3 As shown, taking the compressor 10 as an oil-free compressor as an example, the air outlet of the compressor 10 of the air conditioner 100 can be connected to the outdoor heat exchanger 31, and the return air port of the compressor 10 can be connected to the indoor heat exchanger 32 through the gas-liquid separator 50, and the indoor heat exchanger 32 and the outdoor heat exchanger 31 can be connected through the throttling device 40. So that the refrigerant can circulate between the compressor 10, the outdoor heat exchanger 31, the throttling device 40, the indoor heat exchanger 32, the gas-liquid separator 50 and the compressor 10. At this time, the outdoor heat exchanger 31 can be used to heat the nearby air, and the indoor heat exchanger 32 can be used to cool the nearby air, so that the air conditioner 100 operates in a cooling condition or a dehumidification condition, that is, a single cooling mode. In addition, the gas-liquid separator 50 installed between the indoor heat exchanger 32 and the compressor 10 can also prevent the liquid refrigerant on the user side from directly entering the compressor 10 from the return air port, so that the compressor 10 can operate continuously and stably.

[0055] In the above embodiment, the air conditioner 100 can be operated in a cooling mode only, in which case the outdoor heat exchanger 31 can be used as a condenser, and the indoor heat exchanger 32 can be a corresponding evaporator, so that the air conditioner 100 can be used to cool the nearby air through the indoor heat exchanger 32 (i.e., the evaporator). In addition, if the installation positions of the indoor heat exchanger 32 and the outdoor heat exchanger 31 are swapped, such as in a single-mode air conditioner 100, the indoor heat exchanger 32 can also be set as a condenser, and the outdoor heat exchanger 31 can be a corresponding evaporator, so that the air conditioner 100 can be used to heat the nearby medium through the indoor heat exchanger 32 (i.e., the condenser), with a higher energy efficiency ratio.

[0056] It should be noted that the outdoor heat exchanger 31 can be an air-liquid heat exchanger, such as a fin heat exchanger or a flat tube microchannel heat exchanger. In this case, the heat can be exchanged with the refrigerant flowing through the heat exchanger through a fast-flowing air or a spray coolant. In addition, the outdoor heat exchanger 31 can also be a liquid-liquid heat exchanger, such as a shell and tube heat exchanger or a plate heat exchanger. In this case, the heat can be exchanged with the refrigerant flowing in the heat exchanger through a fast-flowing liquid medium.

[0057] As for the indoor heat exchanger 32, the indoor heat exchanger 32 can be installed in the room of the user side to directly cool or heat the air in the room of the user side. Figure 2 The indoor heat exchanger 32 in the indoor unit is replaced with the above-mentioned liquid-liquid heat exchanger, and the indoor heat exchanger 32 of the indoor unit and the liquid-liquid heat exchanger are connected through a secondary circulation heat exchange branch of a coolant (such as water) to transfer the cold energy of the vaporized liquid refrigerant in the liquid-liquid heat exchanger to the indoor heat exchanger 32 for cooling the air near the indoor heat exchanger 32 arranged near the user side. The setting of the secondary circulation heat exchange branch is also applicable to the air conditioner 100 equipped with a four-way valve.

[0058] In some embodiments, Figure 4 As shown, Figure 4 for Figure 1 A schematic diagram of a connection structure of a heat exchanger assembly 30 shown in . The heat exchanger assembly 30 may include a refrigerant heat exchanger 33, a diverter 34 and an air collecting pipe 35. Among them, the refrigerant heat exchanger 33, as the main structure of the heat exchanger assembly 30, can be used as an outdoor heat exchanger 31 or as an indoor heat exchanger 32, and both can make the refrigerant flowing in the refrigerant heat exchanger 33 exchange heat with the air, that is, used for heat exchange circulation of the refrigerant. Along the flow direction of the refrigerant, the diverter 34 and the air collecting pipe 35 can be installed on opposite sides of the refrigerant heat exchanger 33, and the air collecting pipe 35 can be used to connect the four-way valve 20 or directly connect to the air outlet end of the compressor 10 (single cooling air conditioner).

[0059] In a refrigeration system such as the air conditioner 100, except for the case where the cooling capacity is very small, the refrigerant heat exchanger 33 can be connected in parallel in multiple ways to increase the flow rate of the refrigerant per unit time and ensure that the refrigerant can have sufficient contact area with the air. Exemplarily, the refrigerant heat exchanger 33 may include a plurality of refrigerant pipes arranged in parallel as refrigerant channels, and the refrigerant pipes may be made of metals or metal alloy materials such as copper or aluminum with good thermal conductivity, so that the refrigerant flowing in the plurality of refrigerant pipes can quickly exchange heat with the air. The refrigerant pipe may be a long round pipe structure, or a flat pipe structure with a plurality of microchannel structures, etc. In order to increase the contact area between the refrigerant heat exchanger 33 and the air, the refrigerant heat exchanger 33 may also include a plurality of fins, and the plurality of fins may be installed in contact with the plurality of refrigerant pipes, so as to increase the contact area between the plurality of refrigerant pipes and the air, so as to improve the heat exchange efficiency of the refrigerant heat exchanger 33.

[0060] For example, Figure 5 As shown, Figure 5 A top view of the outdoor unit of the air conditioner 100 provided in the example of the present application. The air conditioner 100 may include a housing 70 (such as the housing of the outdoor unit) and a fan assembly 80, and the refrigerant heat exchanger 33 and the fan assembly 80 as the outdoor heat exchanger 31 may be installed in the housing 70. In this way, since the outdoor heat exchanger 31 may be arranged near the air outlet or air inlet of the housing 70, when the fan assembly 80 is powered on and rotated, the air may be driven by the fan assembly 80 to flow through the outdoor heat exchanger 31, so that the flowing air may exchange heat with the refrigerant flowing inside through the outdoor heat exchanger 31. Among them, the fan assembly 80 installed in the outdoor unit may be a structure such as a centrifugal fan or an axial flow fan, so that the fan assembly 80 drives the air near the outdoor unit to continuously flow through the outdoor heat exchanger 31 and exchange heat. At this time, the housing 70 of the outdoor unit may also be equipped with components of the outdoor unit such as a compressor 10 and a four-way valve.

[0061] Taking the refrigerant heat exchanger 33 as an evaporator of an outdoor unit (i.e., the outdoor heat exchanger 31 in the heating condition) as an example, one end of a plurality of refrigerant pipes arranged in parallel can be connected to the diverter 34, and the other end of the plurality of refrigerant pipes can be connected to the gas collecting pipe 35. The other end of the gas collecting pipe 35 can be connected to the third port C of the four-way valve 20. The other end of the diverter 34 can be connected to the throttling device 40, or the other end of the diverter 34 can be directly connected to the indoor heat exchanger 32 (the diverter 34 can also be used as a throttling device in this case). Based on this, the gas-liquid two-phase refrigerant can be evenly mixed through the plurality of diverter ports of the diverter 34 and then diverted to the plurality of refrigerant pipes of the refrigerant heat exchanger 33, and the refrigerant can be gathered in the gas collecting pipe 35 after evaporation and heat absorption through the plurality of refrigerant pipes, and flow into the compressor 10 through the third port C of the four-way valve 20. By setting the diverter 34, the refrigerant can maintain an optimal flow rate in the refrigerant heat exchanger 33, and at the same time, the pressure drop on the refrigerant side can be controlled within a certain range and the gas-liquid two-phase refrigerant can be evenly distributed in the refrigerant heat exchanger 33, which is beneficial to improving the heat exchange efficiency of the refrigerant in the refrigerant heat exchanger 33.

[0062] In addition, if Figure 6 As shown, Figure 6 A side view of the indoor unit of the air conditioner 100 provided as an example of the present application. At this time, the housing 70 can be the casing of the indoor unit, and the corresponding refrigerant heat exchanger 33 can be used as the indoor heat exchanger 32 installed in the housing 70. A fan assembly 80 can also be installed in the housing 70 of the indoor unit, and the fan assembly 80 can be one of a cross-flow fan, a diagonal flow fan, a centrifugal fan and an axial flow fan. Taking the indoor unit of the suspended duct structure as an example, the fan assembly 80 installed in the housing 70 can be a centrifugal fan, and the air outlet of the fan assembly 80 of the centrifugal structure can be arranged toward the indoor heat exchanger 32, so that the fan assembly 80 can drive the air near the indoor unit to continuously flow through the indoor heat exchanger 32, and the refrigerant circulating in the indoor heat exchanger 32 heats or cools the air flowing through the indoor heat exchanger 32.

[0063] Continue to refer to Figure 6 The refrigerant heat exchanger 33 may include a plurality of refrigerant tubes 331 and a plurality of fins 332, and each fin 332 may be provided with a plurality of mounting holes 333. Figure 7 , Figure 7 for Figure 6A schematic diagram of a three-dimensional structure of a refrigerant heat exchanger 33 is shown in the figure. The fin 332 of the sheet structure can be arranged perpendicular to the first straight line direction, and the multiple fins 332 can be spaced and distributed along the first straight line direction (i.e., the X direction) so that a gap for circulating air can be formed between two adjacent fins 332. Among them, the positions and numbers of the multiple mounting holes 333 opened on each fin 332 can be the same. Based on this, in the process of arranging the multiple fins 332 at intervals along the X direction, the multiple mounting holes 333 on two adjacent fins 332 can be aligned and arranged, such as two adjacent fins 332 can be arranged approximately in parallel. Since the number of refrigerant tubes 331 can be the same as the number of multiple mounting holes 333 on a fin 332, multiple refrigerant tubes 331 and multiple mounting holes 333 on a fin 332 can be arranged one by one. For example, a refrigerant tube 331 can extend along the X direction and pass through the aligned mounting holes 333 in sequence, so that the refrigerant tube 331 can be connected to each fin 332 through the edge contact of the mounting hole 333. In this way, a plurality of fins 332 distributed at intervals can effectively increase the contact and heat exchange area between the refrigerant tube 331 and the air. In this way, when the air flows through the refrigerant heat exchanger 33 through the gap between two adjacent fins 332, the fins 332 and the refrigerant tube 331 can continuously contact the flowing air, thereby improving the heat exchange efficiency between the refrigerant and the air in the refrigerant tube 331.

[0064] It should be noted that each refrigerant tube 331 can be a straight tube structure extending along the X direction. After plugging and installing multiple refrigerant tubes 331, two refrigerant tubes 331 can be connected at the same end through a connecting elbow, so that multiple refrigerant tubes 331 can be connected through multiple connecting elbows and form a refrigerant channel or multiple parallel refrigerant channels in the refrigerant heat exchanger 33. Alternatively, the refrigerant tube 331 can also be a U-shaped tube structure, and the structure of the U-shaped tube can be regarded as two separate refrigerant tubes 331, and the U-shaped bend can be regarded as a connecting elbow connecting the two refrigerant tubes 331.

[0065] It should be noted that when multiple refrigerant tubes 331 in the refrigerant heat exchanger 33 are connected to form a refrigerant channel, this refrigerant channel can be regarded as a channel formed by connecting multiple refrigerant tubes 331 in sequence. Alternatively, this refrigerant channel can also be regarded as a bent refrigerant tube 331, and the multiple straight sections of the bent refrigerant tube 331 can also pass through multiple spaced fins 332 along the X direction, and contact and connect with the multiple fins 332, so as to increase the heat exchange contact area between the refrigerant heat exchanger 33 and the air. In some other embodiments, some refrigerant tubes 331 can also be connected and conducted, so that multiple refrigerant heat exchange channels can be formed in the refrigerant heat exchanger 33, so as to improve the refrigerant flow rate and heat exchange efficiency per unit time.

[0066] Take the indoor unit as an example, if the indoor unit is a duct unit, Figure 8 As shown, Figure 8 It is a side sectional view of the indoor unit of the first air conditioner in the related technical solution. The duct unit 01 may include a housing 02 and a centrifugal fan 03 and a flat plate heat exchanger 04 installed in the housing 02. The flat plate heat exchanger 04 refers to a rectangular structure whose fins are mostly equal in width, or a partially shaped structure at both ends of the rectangle, and the refrigerant pipes on the fins are also evenly arranged corresponding to the width of the fins. Since the air delivered by the centrifugal fan 03 in the indoor unit is generally non-uniform, and in order to reduce the installation space occupied by the indoor unit and increase the heat flux density, in the housing 02, one side of the flat plate heat exchanger 04 can be arranged toward the air outlet of the centrifugal fan 03, and the flat plate heat exchanger 04 can be arranged obliquely in the air flow direction. So that the housing 02 of the same height can accommodate a larger heat exchanger to increase the heat exchange area of ​​the housing 02, which is conducive to improving the heat exchange efficiency.

[0067] Alternatively, a plurality of flat plate heat exchangers 04 may be spliced ​​together to form a folded heat exchanger with a V-shaped, Z-shaped, or W-shaped structure to increase the effective heat exchange area of ​​the heat exchanger in the indoor unit.

[0068] For example, Fig. 9 As shown, Fig. 9 It is a side sectional view of the indoor unit of the second air conditioner in the related technical solution. A single-fold heat exchanger 05 with an approximately V-shaped structure can be installed in the shell 02 of the duct air conditioner 01. The single-fold heat exchanger 05 can be arranged close to the air outlet of the centrifugal fan 03, and can be formed by splicing two flat-plate heat exchangers to form a V-shaped single-fold heat exchanger 05, and the opening of the single-fold heat exchanger 05 can be arranged toward the air outlet of the centrifugal fan 03, thereby increasing the heat exchange area of ​​the heat exchanger in the shell 02, so as to improve the heat exchange efficiency of the duct air conditioner 01. On this basis, if Fig.10 As shown, Fig.10 It is a side view of a multi-fold heat exchanger in the related technical solution. A multi-fold heat exchanger 06 with a W-shaped structure can also be formed by splicing four flat plate structure heat exchangers. When installing the W-shaped multi-fold heat exchanger 06, the openings of the two V-shaped structures on the same side can be arranged toward the air outlet of the centrifugal fan 03, which can also further increase the heat exchange area of ​​the heat exchanger.

[0069] However, in the above-mentioned single-fold heat exchanger 05 and multi-fold heat exchanger 06, a gap for air circulation will be formed between the two adjacent and spliced ​​flat-plate heat exchangers. Or the gap can also be used to install a splicing plate connecting the two heat exchangers. Since the refrigerant pipe cannot be installed at the joint between two adjacent flat-plate heat exchangers, the heat exchange efficiency between the heat exchanger and the air will be reduced. In addition, the split multi-fold heat exchanger formed by splicing has more complicated operating steps when assembled and installed. Especially for the W-shaped multi-fold heat exchanger, since its splicing structure has at least three places, the splicing and installation process is more complicated and greatly affects the heat exchange effect.

[0070] To solve this problem, Fig.11 As shown, Fig.11 for Figure 7 The front view of the first type of fin 332 in the refrigerant heat exchanger 33 shown in FIG. Figure 6 When installing the W-shaped refrigerant heat exchanger 33 and the fan assembly 80 in the air duct unit (as shown in the figure), the W-shaped refrigerant heat exchanger 33 can be set as an integral structure connected by the fins 332 of the integral structure. In the shell 70 of the air duct unit, the up and down direction is the Y direction (such as the second straight line direction), and the refrigerant heat exchanger 33 and the fan assembly 80 can be spaced apart along the Z direction (i.e. the third straight line direction or the left and right direction). Based on this, the fins 332 can be as follows: Fig.11 An integrated planar sheet structure is shown, the fin 332 may include a first connecting piece 3321, a second connecting piece 3322, a third connecting piece 3323 and a fourth connecting piece 3324 connected in sequence along the Y direction. In the Y direction, one end of the second connecting piece 3322 may be bent and connected to the first connecting piece 3321, so that the angle formed between the first connecting piece 3321 and the second connecting piece 3322 may be opened toward the fan assembly 80 along the Z direction. In the Y direction, the other end of the second connecting piece 3322 may be bent and connected to one end of the third connecting piece 3323, so that the opening direction of the angle formed between the second connecting piece 3322 and the third connecting piece 3323 is opposite to the opening direction of the angle formed between the first connecting piece 3321 and the second connecting piece 3322 along the Z direction. Correspondingly, along the Y direction, the other end of the third connecting piece 3323 can be bent and connected to one end of the fourth connecting piece 3324, so that the angle formed between the third connecting piece 3323 and the fourth connecting piece 3324 is set in the same opening direction along the Z direction as the angle formed between the first connecting piece 3321 and the second connecting piece 3322. To form a three-fold and continuously arranged integrated fin structure, and a flat sheet structure.

[0071] Based on this, Fig.11 As shown, a plurality of mounting holes 333 may be provided on the fin 332. Figure 7, after the multiple fins 332 are spaced and distributed in sequence along the X direction, and the multiple mounting holes 333 on two adjacent fins 332 are aligned, a refrigerant tube 331 can be inserted into one mounting hole 333 along the X direction, so that the refrigerant tube 331 can continue to extend along the X direction and be inserted into the multiple mounting holes 333 aligned on other fins 332, so that the refrigerant tube 331 can be in contact with and connected to the multiple fins 332. Correspondingly, a refrigerant tube 331 can be inserted into each mounting hole 333 of a fin 332 in sequence. In this way, the contact area between the refrigerant tube 331 and the air in the refrigerant heat exchanger 33 can be greatly increased by the multiple spaced fins 332. Since each fin 332 is an integrated three-fold structure formed by the first connecting piece 3321, the second connecting piece 3322, the third connecting piece 3323 and the fourth connecting piece 3324, it is approximately W-shaped in the first straight line direction. Thus, by the coordinated installation of the plurality of fins 332 and the plurality of refrigerant tubes 331, an integrated refrigerant heat exchanger 33 can be formed, which can avoid the complicated operation in the assembly and splicing process of the split-multi-fold structure heat exchanger while ensuring that the refrigerant tubes 331 are covered without dead angles on the fins 332. Moreover, taking the duct unit as an example, the indoor unit housing 70 (such as Figure 6 As shown in the figure, the installation size of the refrigerant heat exchanger 33 can be greatly increased by the three-fold structure of the fin 332, which is beneficial to increase the heat exchange area of ​​the refrigerant heat exchanger 33, thereby improving the heat exchange efficiency of the air conditioner 100.

[0072] It should be noted that in the above embodiment, when the integrated three-fold heat exchanger is installed, if the angle formed by the first connecting piece 3321 and the second connecting piece 3322 and the angle formed by the third connecting piece 3323 and the fourth connecting piece 3324 are opened along the Y direction toward the air outlet side of the fan assembly 80, the refrigerant heat exchanger 33 can be regarded as forward installation. In addition, the angle formed by the second connecting piece 3322 and the third connecting piece 3323 can also be opened along the Y direction toward the air outlet side of the fan assembly 80. In this case, the refrigerant heat exchanger 33 can be regarded as reverse installation, and this application does not limit this.

[0073] In addition, when multiple fins 332 are connected to each other along the X direction through multiple refrigerant tubes 331, taking the refrigerant tube 331 as a circular copper tube or aluminum tube or other metal tube, the mounting hole 333 can be a corresponding circular through hole, which is convenient for passing the refrigerant tube 331 and allows the refrigerant tube 331 to contact and connect the fins 332 at the edge of the mounting hole 333. Alternatively, the refrigerant tube 331 can also be a flat tube structure of a microchannel, in which case the mounting hole 333 can be a corresponding strip hole structure or a corresponding slotted structure, so as to facilitate the insertion and installation of the refrigerant tube 331 of the flat tube structure.

[0074] In some embodiments, Fig.12 As shown, Fig.12 for Figure 7 The front view of the second type of fin 332 in the refrigerant heat exchanger 33 shown in the figure. The sheet-like structure of the fin 332 may also include a fifth connecting piece 3325, a sixth connecting piece 3326 and a seventh connecting piece 3327. Among them, along the Y direction, the fifth connecting piece 3325 may be located between the first connecting piece 3321 and the second connecting piece 3322. So that the first connecting piece 3321 can be connected to the second connecting piece 3322 through the fifth connecting piece 3325. In this way, the first connecting piece 3321 and the second connecting piece 3322 are connected to the two ends of the fifth connecting piece 3325 along the Y direction, and the first connecting piece 3321 and the second connecting piece 3322 can be bent toward the same side of the fifth connecting piece 3325 along the Z direction, so that the angle formed by the first connecting piece 3321 and the second connecting piece 3322 can be toward the fan assembly 80 (such as Figure 6 As shown) opening setting (i.e. forward installation).

[0075] Continue to refer to Fig.12 , along the Y direction, the sixth connecting piece 3326 can be located between the second connecting piece 3322 and the third connecting piece 3323. So that one end of the sixth connecting piece 3326 along the Y direction can be connected to the end of the second connecting piece 3322 away from the fifth connecting piece 3325, and the other end of the sixth connecting piece 3326 can be connected to the third connecting piece 3323. In this way, the second connecting piece 3322 and the third connecting piece 3323 connected to both ends of the sixth connecting piece 3326 can be bent along the Z direction toward the same side of the sixth connecting piece 3326, so that the angle formed between the second connecting piece 3322 and the third connecting piece 3323 is set in the opposite direction of the opening direction of the angle formed between the first connecting piece 3321 and the second connecting piece along the Z direction. Correspondingly, the seventh connecting piece 3327 can be located between the third connecting piece 3323 and the fourth connecting piece 3324. So that one end of the seventh connecting piece 3327 along the Y direction can be connected to the end of the third connecting piece 3323 away from the sixth connecting piece 3326, and the other end of the seventh connecting piece 3327 can be connected to one end of the fourth connecting piece 3324. In this way, the third connecting piece 3323 and the fourth connecting piece 3324 connected to the two ends of the seventh connecting piece 3327 can be bent along the Z direction toward the same side of the seventh connecting piece 3327, so that the angle formed between the third connecting piece 3323 and the fourth connecting piece 3324 is set in the same opening direction along the Z direction as the angle formed between the first connecting piece 3321 and the second connecting piece. Subsequently, the refrigerant pipe 331 (such as Figure 7 As shown in the figure, a plurality of spaced fins 332 are inserted and connected through the mounting holes 333 along the X direction to form an integrated multi-fold refrigerant heat exchanger 33, which is beneficial to increasing the heat exchange area of ​​the refrigerant heat exchanger 33 in the shell 70.

[0076] Based on this, in the above two structures of the fin 332, the fin 332 only needs to be provided with four connecting pieces bent in sequence along the Y direction to form Fig.11 The fin 332 of the integrated sheet structure shown in the figure has a simple structure and can make the refrigerant heat exchanger 33 (such as Figure 7 As shown) has good integrity. Fig.12 As for the fin 332 shown, although the fifth connecting piece 3325, the sixth connecting piece 3326 and the seventh connecting piece 3327 are additionally provided, along the Z direction, the existence of the above three connecting pieces allows a relatively smooth transition between the bent and connected first connecting piece 3321, the second connecting piece 3322, the third connecting piece 3323 and the fourth connecting piece 3324, thereby avoiding the formation of a pointed structure or a deeper angle structure on the air inlet side and the air outlet side of the refrigerant heat exchanger 33 in the Z direction, which is beneficial to reducing the wind noise of the refrigerant heat exchanger 33 and reducing the burr structure on both sides of the fin 332 in the Z direction.

[0077] It should be noted that, in the embodiment of the present application, the third linear direction (i.e., Z direction) may be perpendicular to the first linear direction (i.e., Z direction) and the second linear direction (i.e., Y direction). The first linear direction and the second linear direction may be intersecting or perpendicular to each other. Fig.11 The fin 332 shown in the figure may refer to a first connecting piece 3321, a second connecting piece 3322, a third connecting piece 3323 and a fourth connecting piece 3324. Fig.12 The fin 332 shown in the figure may refer to a first connecting piece 3321, a second connecting piece 3322, a third connecting piece 3323, a fourth connecting piece 3324, a fifth connecting piece 3325, a sixth connecting piece 3326 and a seventh connecting piece 3327. This is not limited.

[0078] like Fig.13 As shown, Fig.13 for Figure 7 332 in the refrigerant heat exchanger 33. In some embodiments, the fin 332 may have an air inlet contour line 3328 and an air outlet contour line 3329, and the air inlet contour line 3328 and the air outlet contour line 3329 may be two edges of the fin 332 that are arranged opposite to each other in the Z direction. Taking the refrigerant heat exchanger 33 installed in the forward direction as an example, the air inlet contour line 3328 may be the air outlet contour line 332 of the fin 332 along the Z direction close to the fan assembly 80 (such as Figure 6 Take the example that the fin 332 includes a first connecting piece 3321, a fifth connecting piece 3325, a second connecting piece 3322, a sixth connecting piece 3326, a third connecting piece 3323, a seventh connecting piece 3327 and a fourth connecting piece 3324 connected in sequence.

[0079] The inner edge of the angle formed by the first connecting piece 3321, the fifth connecting piece 3325 and the second connecting piece 3322 near the opening in the Z direction is a part of the air inlet contour line 3328. The outer edge of the angle formed by the second connecting piece 3322, the sixth connecting piece 3326 and the third connecting piece 3323 away from the opening in the Z direction is a part of the air inlet contour line 3328. And the inner edge of the angle formed by the third connecting piece 3323, the seventh connecting piece 3327 and the fourth connecting piece 3324 near the opening in the Z direction is also a part of the air inlet contour line 3328.

[0080] Correspondingly, the outer edge of the angle formed by the first connecting piece 3321, the fifth connecting piece 3325 and the second connecting piece 3322 in the Z direction away from the opening is a part of the air outlet contour line 3329. The inner edge of the angle formed by the second connecting piece 3322, the sixth connecting piece 3326 and the third connecting piece 3323 in the Z direction close to the opening is a part of the air outlet contour line 3329. And the outer edge of the angle formed by the third connecting piece 3323, the seventh connecting piece 3327 and the fourth connecting piece 3324 in the Z direction away from the opening is also a part of the air outlet contour line 3329.

[0081] Based on this, Fig.13 As shown, on the same fin 332, the shape and size of the air inlet contour line 3328 and the air outlet contour line 3329 can be set to be the same, and the spacing between the air inlet contour line 3328 and the air outlet contour line 3329 in the Z direction can be the same. So that the air inlet contour line 3328 can completely overlap with the air outlet contour line after translation in the Z direction. That is, along the Y direction, the width dimension of the fin 332 at any position in the Z direction is the same. Correspondingly, the width dimensions of the first connecting piece 3321, the second connecting piece 3322, the third connecting piece 3323, the fourth connecting piece 3324, the fifth connecting piece 3325, the sixth connecting piece 3326 and the seventh connecting piece 3327 in the Z direction are the same. In this way, combined with Fig.14 After the multiple fins 332 are distributed in sequence along the Z direction, the air inlet contour lines 3328 and the air outlet contour lines 3329 of two adjacent fins 332 that are close to each other can be completely overlapped to form a continuous sheet structure in the Z direction.

[0082] Based on this, in the process of producing the fins 332, a stamping or cutting device can be used to stamp or cut out fins 332 of corresponding shapes in sequence along the Z direction on the sheet raw material. Between two adjacent fins 332, since the air inlet contour line 3328 and the air outlet contour line 3329 can completely overlap, no additional waste will be generated, which facilitates the continuous cutting production of the fins 332 and is beneficial to improving the utilization rate of the raw materials.

[0083] Continue to refer to Fig.13 , the fin 332 may also have a first edge line 33211 and a second edge line 33212. Along the Y direction, the two oppositely disposed edges of the fin 332 may be the first edge line 33211 and the second edge line 33212, that is, the first edge line 33211 may be a side edge of the first connecting piece 3321 away from the fifth connecting piece 3325, and the second edge line 33212 may be a side edge of the fourth connecting piece 3324 away from the seventh connecting piece 3327. Along the Y direction, the first edge line 33211 may be connected between one end of the air inlet contour line 3328 and the air outlet contour line 3329 in the same direction (i.e., the end located at the first connecting piece 3321), and the second edge line 33212 may be connected between the other end of the air inlet contour line 3328 and the air outlet contour line 3329 in the same direction (i.e., the end located at the fourth connecting piece 3324). Based on this, the first edge line 33211 and the second edge line 33212 can be arranged in parallel and extend along the Z direction, that is, the length dimension of the first edge line 33211 (or the second edge line 33212 ) in the Z direction is equivalent to the width dimension of the fin 332 .

[0084] Combination Fig.14 , after the plurality of fins 332 are sequentially distributed along the Z direction, the air inlet contour lines 3328 and the air outlet contour lines 3329 of two adjacent fins 332 that are close to each other can be completely overlapped to form a continuous sheet structure in the Z direction. Correspondingly, the plurality of first edge lines 33211 of the plurality of fins 332 can be connected along the Z direction to form a straight line structure, and the corresponding plurality of second edge lines 33212 can also be connected along the Z direction to form a straight line structure. Based on this, in the process of processing and manufacturing the fins 332 by a continuous cutting process, taking the processing raw material as a rectangular sheet continuous in the Z direction as an example, the size of the rectangular sheet in the Y direction can be set to be the same as the size of the fins 332 in the Y direction. In this way, along the Z direction, except for the end at the beginning of the processing and the tail at the end of the processing, no scraps will be generated in the process of continuously cutting the fins 332. The utilization rate of the raw materials can be effectively improved, and there is no need to worry about the scraps affecting the high-precision equipment for processing and cutting during the processing and cutting process.

[0085] In some embodiments, continue to refer to Fig.13, both ends of the air inlet contour line 3328 along the Y direction may be provided with a chamfered structure or a rounded structure, which is used to connect the first edge line 33211 and the second edge line 33212. Exemplarily, one end of the air inlet contour line 3328 along the Y direction close to the first edge line 33211 may be connected to the first edge line 33211 after being bent through a rounded structure or a chamfered structure. Correspondingly, one end of the air inlet contour line 3328 along the Y direction close to the second edge line 33212 may also be connected to the second edge line 33212 after being bent through a rounded structure or a chamfered structure. The rounded structure may be a part of the air inlet contour line 3328, so that the first edge line 33211 and the second edge line 33212 may maintain a straight line structure extending along the Y direction, which may avoid having a tip structure on the first connecting piece 3321 and the fourth connecting piece 3324, which is conducive to reducing the probability of generating burrs during the process of stamping or shearing the fin 332, and may avoid the tip deformation of the fin 332.

[0086] Since the inlet contour line 3328 and the outlet contour line 3329 have the same shape and size, correspondingly, the end of the outlet contour line 3329 along the Y direction close to the first edge line 33211 can also be connected to the first edge line 33211 after being bent through a rounded structure or a chamfered structure. And the end of the outlet contour line 3329 along the Y direction close to the second edge line 33212 can also be connected to the second edge line 33212 after being bent through a rounded structure or a chamfered structure. Fig.14 , so that multiple fins 332 distributed in sequence can be seamlessly connected in sequence in the Z direction.

[0087] like Fig.15 As shown, Fig.15 for Figure 7 The front view of the fourth type of fin 332 in the refrigerant heat exchanger 33 shown in FIG. Take the fin 332 including seven connecting pieces connected in sequence along the Y direction, namely the first connecting piece 3321, the fifth connecting piece 3325, the second connecting piece 3322, the sixth connecting piece 3326, the third connecting piece 3323, the seventh connecting piece 3327 and the fourth connecting piece 3324 as an example. Along the Y direction, between two adjacent connecting pieces, such as between the first connecting piece 3321 and the fifth connecting piece 3325, since the air inlet contour line 3328 is extended from the edge of the first connecting piece 3321 to the edge of the fifth connecting piece 3325 through a bending structure, the air inlet contour lines 3328 on the two connecting pieces can be connected by a rounded structure or a chamfered structure at the bending structure. It can also avoid having a tip structure at the air inlet contour line 3328 of two adjacent connecting pieces, which is conducive to reducing the probability of generating burrs during stamping or shearing of the fin 332, and can avoid the tip deformation of the fin 332.

[0088] For example, Fig.15 As shown, on the side of the fin 332 close to the air inlet contour line 3328, the rounded corner structure or the chamfered corner structure can be provided at one or more locations between the first connecting piece 3321 and the fifth connecting piece 3325, between the fifth connecting piece 3325 and the second connecting piece 3322, between the second connecting piece 3322 and the sixth connecting piece 3326, between the sixth connecting piece 3326 and the third connecting piece 3323, between the third connecting piece 3323 and the seventh connecting piece 3327, and between the seventh connecting piece 3327 and the fourth connecting piece 3324. At the air outlet contour line 3329, the shape and size of the air outlet contour line 3329 and the air inlet contour line 3328 can be kept the same, and there is no limitation on this.

[0089] It should be noted that when the fin 332 includes four connecting pieces, namely, the first connecting piece 3321, the second connecting piece 3322, the third connecting piece 3323 and the fourth connecting piece 3324, which are connected in sequence along the Y direction. The inner edge of the angle formed by the first connecting piece 3321 and the second connecting piece 3322 close to the opening in the Z direction is a part of the air inlet contour line 3328. And the inner edge of the angle formed by the third connecting piece 3323 and the fourth connecting piece 3324 close to its opening in the Z direction is also a part of the air inlet contour line 3328. Correspondingly, the outer edge of the angle formed by the first connecting piece 3321 and the second connecting piece 3322 away from its opening in the Z direction is a part of the air outlet contour line 3329. And the outer edge of the angle formed by the third connecting piece 3323 and the fourth connecting piece 3324 away from its opening in the Z direction is also a part of the air outlet contour line 3329.

[0090] At this time, the two ends of the air inlet contour line 3328 can also be connected to the first edge line 33211 and the second edge line 33212 after being bent through a rounded structure or a chamfered structure. Correspondingly, the two ends of the air outlet contour line 3329 can also be connected to the first edge line 33211 and the second edge line 33212 after being bent through a rounded structure or a chamfered structure. Among them, along the Z direction, the air inlet contour line 3328 between two adjacent connecting pieces can connect the edges of the two connecting pieces through a rounded structure or a chamfered structure, thereby avoiding a tip structure or a small angle structure. For example, the rounded structure or the chamfered structure can be set at one or more places between the first connecting piece 3321 and the second connecting piece 3322, between the second connecting piece 3322 and the third connecting piece 3323, and between the third connecting piece 3323 and the fourth connecting piece 3324. At the air outlet contour line 3329, it is necessary to keep the shape and size of the air outlet contour line 3329 and the air inlet contour line 3328 the same, and there is no limitation on this.

[0091] In order to facilitate the installation and placement of the refrigerant heat exchanger 33, when the refrigerant heat exchanger 33 includes seven connecting pieces that are bent and connected in sequence, as shown in FIG. Fig.15 As shown, taking the fin 332 in the forward-mounted refrigerant heat exchanger 33 as an example, the angle formed by the second connecting piece 3322 and the third connecting piece 3323 can be directed away from the fan assembly 80 along the Z direction (such as Figure 6 The air outlet side opening is shown in FIG. 1 . Based on this, along the Z direction, the edge of the fifth connecting piece 3325 away from the above-mentioned air outlet side and the edge of the seventh connecting piece away from the above-mentioned air outlet side can be aligned in the Y direction. That is, the air outlet contour line 3329 on the fifth connecting piece 3325 and the air outlet contour line 3329 on the seventh connecting piece 3327 are arranged in a colinear manner along the Y direction. In this way, the refrigerant heat exchanger 33 can be formed by connecting a plurality of fins 332 spaced apart in the first straight line direction. During the production, transportation and installation process, the air outlet contour line 3329 on the fifth connecting piece 3325 and the air outlet contour line 3329 on the seventh connecting piece 3327 can be used as a reference line, and a support surface can be formed by the reference line on the plurality of fins 332 for stably placing and supporting the refrigerant heat exchanger 33, which is more convenient and does not require an additional support structure.

[0092] For the refrigerant heat exchanger 33, the longer the refrigerant path of the series-connected refrigerant pipes 331 is, the more flow time the refrigerant can continue to exchange heat with the air, thereby improving the heat exchange efficiency of the refrigerant. Correspondingly, the more passages the parallel-connected refrigerant pipes 331 have, the greater the refrigerant flow rate per unit time, that is, the air conditioner 100 can have a greater cooling or heating power.

[0093] like Fig.15 As shown, along the Z direction, the plurality of mounting holes 333 located on the fin 332 may be in one row, two rows, three rows or even more. Exemplarily, one or two rows of mounting holes 333 may be provided on the fin 332 according to the requirements. In order to make the refrigerant heat exchanger 33 have better heat exchange efficiency and cooling and heating power, the number of mounting holes 333 in each row may be set between ten and eighteen, and the diameter of the mounting holes 333 and the diameter of the refrigerant pipe 331 may be adjusted accordingly. Based on this, combined with Figure 6 In the shell 70 of the same height (in the Y direction), the three-fold integrated refrigerant heat exchanger 33 can increase the heat exchange area of ​​the fins 332 and the number of mounting holes 333 and refrigerant pipes 331, which is beneficial to improve the cooling and heating power of the indoor unit.

[0094] For example, if the outer diameter of the refrigerant tube 331 and the inner diameter of the mounting hole 333 are 7 mm, the number of mounting holes 333 in each column can be set to be less than or equal to twelve. Correspondingly, if the outer diameter of the refrigerant tube 331 and the inner diameter of the mounting hole 333 are 5 mm, the number of mounting holes 333 in each column can be less than or equal to eighteen. Alternatively, the outer diameter of the refrigerant tube 331 and the inner diameter of the mounting hole 333 can be set to 6.35 mm, in which case the number of mounting holes 333 in each column can be fourteen, fifteen or sixteen.

[0095] Among them, the fifth connecting piece 3325, the sixth connecting piece 3326 and the seventh connecting piece 3327 can be approximately rectangular sheet structures. That is, the edges of the fifth connecting piece 3325, the sixth connecting piece 3326 and the seventh connecting piece 3327 corresponding to the air inlet contour line 3328 can be approximately arranged in parallel. And the edges of the fifth connecting piece 3325, the sixth connecting piece 3326 and the seventh connecting piece 3327 corresponding to the air outlet contour line 3329 can be approximately arranged in parallel. Correspondingly, the first connecting piece 3321, the second connecting piece 3322, the third connecting piece 3323 and the fourth connecting piece 3324 can be approximately diamond sheet structures. That is, the edges of the first connecting piece 3321, the second connecting piece 3322, the third connecting piece 3323 and the fourth connecting piece 3324 corresponding to the air inlet contour line 3328 can be approximately arranged in parallel. Furthermore, the edges of the first connecting piece 3321 , the second connecting piece 3322 , the third connecting piece 3323 and the fourth connecting piece 3324 may be approximately arranged in parallel.

[0096] Taking the example that the number of mounting holes 333 in each column is sixteen, four mounting holes 333 may be arranged in sequence on the first connecting piece 3321, the second connecting piece 3322, the third connecting piece 3323 and the fourth connecting piece 3324. Along the Z direction, the mounting hole 333 of the first connecting piece 3321 close to the end of the fifth connecting piece 3325 may be located at the junction of the fifth connecting piece 3325 and the first connecting piece 3321, and the mounting hole 333 of the second connecting piece 3322 close to the end of the fifth connecting piece 3325 may be located at the junction of the fifth connecting piece 3325 and the second connecting piece 3322, that is, it can be regarded that two common mounting holes 333 are also provided on the fifth connecting piece 3325. Similarly, the sixth connecting piece 3326 and the seventh connecting piece 3327 may also be regarded as having two common mounting holes 333.

[0097] If the number of mounting holes 333 in each column is fourteen, three mounting holes 333 may be arranged in sequence on the second connecting piece 3322 and the third connecting piece 3323. The fifth connecting piece 3325, the sixth connecting piece 3326 and the seventh connecting piece 3327 may also be regarded as having two common mounting holes 333.

[0098] In some embodiments, reference Fig.15, multiple mounting holes 333 in each column can be arranged on the fin at intervals along the extension direction of the air inlet contour line 3328 (or the air outlet contour line 3329). Taking the case where two columns of mounting holes 333 are provided on the fin 332 as an example, the two columns of mounting holes 333 can be arranged at intervals along the Z direction. When the width dimension of the fin 332 along the Z direction is 4d, the center spacing of the two columns of mounting holes 333 in the Z direction can be 2d. Correspondingly, along the Z direction, the spacing between the center of a column of mounting holes 333 close to the air inlet contour line 3328 and the air inlet contour line 3328 can be d, and the spacing between the center of a column of mounting holes 333 close to the air outlet contour line 3329 and the air outlet contour line 3329 can be d. In this way, multiple columns of mounting holes 333 can be distributed more evenly on the fin 332 in the Z direction, which is conducive to improving the uniformity of heat exchange of the fin 332.

[0099] In addition, taking the width of the fin 332 along the Z direction as 4d as an example, if only one row of mounting holes 333 is provided on the fin 332, along the Z direction, the distance between the center of the row of mounting holes 333 and the air inlet contour line 3328 and the air outlet contour line 3329 can be 2d.

[0100] Correspondingly, continue to refer to Fig.15 , among the multiple mounting holes 333 in the same column, taking the number of mounting holes 333 as N, the center distance between two adjacent mounting holes 333 can be set to be the same and L, so that the multiple mounting holes 333 can be evenly and spacedly distributed along the extension direction of the air inlet contour line 3328. Based on this, since there is a gap between the first edge line 33211 and the second edge line 33212 at both ends of the column of mounting holes 333 in the Y direction. The extension length of the fin 332 along the air inlet contour line 3328 can be set to N〃L. And the two mounting holes 333 at both ends can be approximately evenly distributed.

[0101] On this basis, when multiple rows of mounting holes 333 are provided on the fin 332, the mounting position between two adjacent rows of mounting holes 333 can be adjusted so that in the direction perpendicular to the air inlet contour line 3328 (or the air outlet contour line 3329), between two adjacent rows of mounting holes 333, the center spacing of the two mounting holes 333 in the direction corresponding to the part is L. Since the multiple refrigerant tubes 331 are inserted and connected to the multiple fins 332 along the X direction, the shape of the refrigerant tube 331 is generally a folded U-shaped tube (which can be regarded as two refrigerant tubes). In addition, between the corresponding two refrigerant tubes 331, a U-shaped connecting elbow is also required to be used to connect and conduct the two refrigerant tubes 331 through a welding process. Based on this, by setting the center spacing of multiple mounting holes 333 in the same row to L, there are also two mounting holes with a center spacing of L in the two adjacent rows of mounting holes 333. The U-shaped refrigerant tube 331 and the U-shaped connecting elbow can have the same structural dimensions to complete the assembly process of the refrigerant heat exchanger 33 without the need to additionally set up U-shaped refrigerant tubes 331 or U-shaped connecting elbows of other sizes, which is conducive to simplifying the production process and improving the assembly efficiency of the refrigerant heat exchanger 33.

[0102] It should be noted that, in the case where a plurality of rows of mounting holes 333 are provided on a fin 332, the width dimension of the fin 332 in the second straight line direction may be adjusted, or the distribution spacing of the mounting holes 333 may be adjusted so that L=2d. Alternatively, the distribution mode of the mounting holes 333 in two adjacent rows may be adjusted so that the plurality of mounting holes 333 in the two adjacent rows are staggered in the Z direction, and the center spacing between the mounting holes 333 in one row and the two adjacent mounting holes in the other row may be the same, and both are L. This is convenient for the plug-in installation of the refrigerant pipe 331.

[0103] In the embodiment of the present application, on the same fin 332, the air inlet contour line 3328 and the air outlet contour line 3329 have the same shape and size. And the air inlet contour line 3328 can be arranged to overlap with the air outlet contour line 3329 after translation along the Z direction. That is, the width dimension of the fin 332 at any position along the Z direction is the same. Based on this, for the first connecting piece 3321, the fifth connecting piece 3325, the second connecting piece 3322, the sixth connecting piece 3326, the third connecting piece 3323, the seventh connecting piece 3327 and the fourth connecting piece 3324 connected in sequence, the fifth connecting piece 3325, the sixth connecting piece 3326 and the seventh connecting piece 3327 can be a rectangular sheet structure whose central axis is parallel to the Z direction or the Y direction. And the first connecting piece 3321, the second connecting piece 3322, the third connecting piece 3323 and the fourth connecting piece 3324 arranged obliquely have an angle between their extension direction and the Y direction. Based on this, the first connecting sheet 3321, the second connecting sheet 3322, the third connecting sheet 3323 and the fourth connecting sheet 3324 are diamond-shaped sheet structures as an example. Fig.15 As shown, in the direction perpendicular to the air inlet contour line 3328 of the corresponding connecting piece, the width dimensions of the fifth connecting piece 3325, the sixth connecting piece 3326 and the seventh connecting piece 3327 can all be 4d, and the width dimensions of the first connecting piece 3321, the second connecting piece 3322, the third connecting piece 3323 and the fourth connecting piece 3324 can be w1, w2, w3 and w4 respectively, and satisfy w1=w2=w3=w4≤4d.

[0104] Based on this, for the refrigerant heat exchanger 33, in the direction perpendicular to the air inlet contour line 3328, the width of the fins 332 can be regarded as being arranged in a staggered manner along the connection direction of the seven connecting pieces, which is conducive to the gradual adjustment of the resistance of the refrigerant heat exchanger 33 on the air flow path. Thereby, the uniformity of the wind field on the surface of the refrigerant heat exchanger 33 is improved to improve the heat exchange efficiency.

[0105] In the above embodiment, Fig.15 Taking the fin 332 shown in the figure as an example, a plurality of the fins 332 are formed into Figure 7 After the refrigerant heat exchanger 33 shown in FIG. 1 is installed in a forward direction, the refrigerant heat exchanger 33 is installed in a forward direction. Figure 6 In the housing 70 of the duct machine shown in the figure, the refrigerant heat exchanger 33 is arranged directly opposite the air outlet of the fan assembly 80. Based on this, the Y direction is the up-down direction, and the Z direction is the left-right direction. After simulation test, as Fig.16 As shown, Fig.16 for Fig.15 A wind field simulation diagram of the refrigerant heat exchanger 33 made of fins 332 is shown. In the up and down directions, the refrigerant heat exchanger 33 will form more oblique airflows at the sixth connecting piece 3326, the third connecting piece 3323, the seventh connecting piece 3327 and the fourth connecting piece 3324. Fig.17 , Fig.17 for Fig.16 A cross-sectional view at AA in FIG. Obviously, more transverse (inclined in the X direction) airflow will be formed on the windward side of the refrigerant heat exchanger 33 directly facing the air outlet of each fan assembly 80. In this way, more oblique airflow and transverse airflow will cause the windward side of the refrigerant heat exchanger 33 to have a larger fin sound, affecting the user experience.

[0106] To solve this problem, Fig.18 As shown, Fig.18 for Figure 7The front view of the fifth type of fin 332 in the refrigerant heat exchanger 33 shown in . When arranging the first connecting piece 3321 and the fourth connecting piece 3324, the value range of the first angle α1 formed by the edge of the air inlet contour line 3328 at the first connecting piece 3321 and the Z direction can be set to be 110° to 150°. Correspondingly, the value range of the second angle α2 formed by the edge of the air inlet contour line 3328 at the fourth connecting piece 3324 and the Z direction is 110° to 150°. Among them, the edge of the air inlet contour line 3328 and the edge of the air outlet contour line 3329 on each connecting piece can be set approximately in parallel. The parameters of the first angle and the second angle can be the same or different, and the present application does not limit this.

[0107] In addition, continue to refer to Fig.18 The value range of the third angle α3 formed between the edge of the air inlet contour line 3328 at the first connecting piece 3321 and the edge of the air inlet contour line 3328 at the fourth connecting piece 3324 can also be set to be 80° to 110°.

[0108] It should be noted that in the air flow passage of the duct unit, since the refrigerant heat exchanger 33 is a resistance element in the air flow passage, especially for the fins 332 of the refrigerant heat exchanger 33, its inclination angle will significantly affect the air volume of the duct unit and the wind speed distribution on the surface of the refrigerant heat exchanger 33. Based on this, when the setting range of the first angle and the second angle is between 110° and 150°, and the setting range of the third angle is between 80° and 110°, the phenomenon of airflow blowing sideways on the windward side of the refrigerant heat exchanger 33 can be effectively suppressed, which is conducive to reducing the fin sound caused thereby.

[0109] It should be noted that, taking the forward-mounted refrigerant heat exchanger 33 as an example, the airflow deflection near the refrigerant heat exchanger 33 in the shell 70 mainly occurs on the side of the third connecting piece 3323 close to the air inlet contour line 3328. Based on this, along the Z direction, the sixth connecting piece 3326 is offset toward the side close to the fan assembly 80 compared to the fifth connecting piece 3325 and the seventh connecting piece 3327. So that the second connecting piece 3322 and the third connecting piece 3323 can be tilted compared to the Y direction. Based on this, in the Z direction, the maximum distance between the edge of the sixth connecting piece 3326 corresponding to the air inlet contour line 3328 and the edge of the first connecting piece 3321 or the fourth connecting piece 3324 corresponding to the air inlet contour line 3328 can be defined as T. That is, the distance between the end of the first connecting piece 3321 on one side of the air inlet contour line 3328 and away from the fourth connecting piece 3324 in the direction of the third straight line is T. Combined with Fig.15 , T can be set to be greater than or equal to the center distance L between two adjacent mounting holes 333 in the same column.

[0110] In this way, the dimension of the sixth connecting piece 3326 offset toward the fan assembly 80 can be reduced, which is equivalent to reducing the inclination angle of the third connecting piece 3323 compared to the second straight line direction, and the airflow deviation phenomenon on the side of the third connecting piece 3323 close to the air inlet contour line 3328 can be alleviated, thereby suppressing the generation of fin sound here.

[0111] In some embodiments, in order to install more refrigerant pipes 331 within the limited height of the manifold. Fig.18 , the extension length of the sixth connecting piece 3326 in the Y direction and the width dimension of the sixth connecting piece 3326 in the Z direction can be appropriately increased. At this time, on the sixth connecting piece 3326, the arrangement direction of each column of mounting holes 333 may not be the same as the extension direction of the air inlet contour line 3328 or the air outlet contour line 3329. Exemplarily, taking the number of mounting holes 333 in each column as fifteen or sixteen, four mounting holes 333 can be arranged on the first connecting piece 3321, three mounting holes 333 can be arranged on the second connecting piece 3322 and the third connecting piece 3323 in sequence, and four mounting holes 333 can be arranged on the fourth connecting piece 3324. And the fifth connecting piece 3325 and the seventh connecting piece 3327 are equivalent to sharing two mounting holes. In this way, the two ends of the sixth connecting piece 3326 in the Y direction share two mounting holes 333 with the third connecting piece 3323 and the second connecting piece 3322. In the Z direction, another one or two mounting holes 333 in a row can be offset close to the air outlet contour line 3329 so that the angle formed by the center line connecting the three or four mounting holes 333 on the sixth connecting plate 3326 can be opened in the direction of the air inlet contour line 3328.

[0112] Based on this, when the length of the sixth connecting piece 3326 in the Y direction is not enough to set three or four mounting holes 333, the above-mentioned arrangement of the mounting holes 333 can be used to allow an additional mounting hole 333 to be arranged on the sixth connecting piece 3326. This is conducive to arranging more refrigerant pipes 331 in the limited height space of the duct air conditioner.

[0113] It should be noted that, as required, the arrangement of the above-mentioned mounting holes 333 can also be set at the fifth connecting piece 3325 or the seventh connecting piece 3327. Correspondingly, if multiple rows of mounting holes 333 are provided on the fin 332, in two adjacent rows of mounting holes 333, the size and shape of the center line of each row of mounting holes 333 can be set to be approximately the same.

[0114] For example, the fin 332 is provided with two rows of mounting holes 333. Fig.18As shown, on the sixth connecting piece 3326, in a row of mounting holes 333, the mounting holes 333 near the two oppositely arranged ends of the second connecting piece 3322 and the third connecting piece 3323 along the Y direction can be defined as outer mounting holes 333, and the other two mounting holes 333 are inner mounting holes 333. In a row of mounting holes 333 arranged near the air outlet contour line 3329, along the Z direction, it can be defined that the distance between the center of the two outer mounting holes 333 and the air outlet contour line 3329 is L1, and the distance between the center of the two inner mounting holes 333 and the air outlet contour line 3329 is L2. Correspondingly, in a row of mounting holes 333 arranged near the air inlet contour line 3328, along the Z direction, it can be defined that the distance between the center of the two outer mounting holes 333 and the air inlet contour line 3328 is L3, and the distance between the center of the two inner mounting holes 333 and the air outlet contour line 3329 is L4, and L1>L3 and L2<L4 are satisfied.

[0115] It should be noted that, in the embodiment of the present application, the fin 332 including multiple mounting holes 333 may have an axisymmetric structure in which the sixth connecting piece 3326 is parallel to the central axis in the Z direction. In addition, in the above example, the center spacing of multiple mounting holes 333 in the same column may all be L, so as to facilitate the plug-in installation of the refrigerant pipe 331.

[0116] In some embodiments, on the fin 332, if the number of multiple mounting holes 333 in the same column is large, only a part of them is needed to be used for plugging in the refrigerant tube 331 to meet the heat dissipation efficiency of the duct machine. On this basis, in the Y direction, since the fourth connecting piece 3324 is further away from the air outlet side of the fan assembly 80. Based on this, it can be set that at least one mounting hole 333 located on the fourth connecting piece 3324 in the column is not plugged in and installed with the refrigerant tube 331. In this way, the refrigerant tube 331 can be arranged close to the air outlet side of the fan assembly 80 in the Y direction, because the air flow speed at the fourth connecting piece 3324 is small (that is, the air circulation volume is small). Reducing the number of refrigerant tubes 331 arranged at this position can maximize the reduction of the adverse effect of the refrigerant tube 331 on the heat exchange efficiency of the refrigerant heat exchanger 33.

[0117] For example, a row of mounting holes 333 is provided on the fin 332, and the number of mounting holes 333 in each row on the fourth connecting piece 3324 is three or four. In this case, any one or more mounting holes 333 can be skipped when inserting and installing the refrigerant pipe 331, and then a large-span elbow can be used to connect two refrigerant pipes 331 that are spaced apart.

[0118] If the fin 332 is provided with multiple rows of mounting holes 333, and the number of mounting holes 333 in each row on the fourth connecting piece 3324 is three or four. In order to facilitate the plug-in installation of the refrigerant tube 331, one or more mounting holes 333 near the seventh connecting piece 3327 or the second edge line 33212 can be set vacantly, without plugging and installing the refrigerant tube 331. Exemplarily, among the multiple mounting holes 333 located on the fourth connecting piece 3324 in one row, one mounting hole 333 near the second edge line along the Y direction can be installed without plugging and installing the refrigerant tube 331. Among the multiple mounting holes 333 located on the fourth connecting piece 3324 in another row, one mounting hole 333 near the seventh connecting piece 3327 along the Y direction can be installed without plugging and installing the refrigerant tube 331. Among them, the one mounting hole 333 near the seventh connecting piece 3327 can be set vacantly in a row near the air outlet contour line 3329. Both are beneficial to making the refrigerant heat exchanger 33 have a greater heat exchange efficiency when fewer refrigerant pipes 331 are installed.

[0119] It should be noted that in the above embodiment, during the production and processing of the fins 332, the mounting holes 333 can still be opened at the spare hole positions, which is conducive to unifying the production specifications of the fins 332 and facilitating mass production of the fins 332. In addition, it is also possible not to open corresponding mounting holes 333 at the spare hole positions, which is conducive to simplifying the structure of the fins 332.

[0120] In the above embodiment, the sixth connecting piece 3326 can be approximately a rectangular sheet structure, so that the multiple mounting holes 333 in the same row on the sixth connecting piece can have different spacing sizes with the edge where the air inlet contour line 3328 is located.

[0121] In addition, if Fig.19 As shown, Fig.19 for Figure 7 . In this embodiment, the sixth connecting piece 3326 may also be a non-rectangular piece structure. At this time, in the same column of mounting holes 333, the center line of the plurality of mounting holes 333 on the sixth connecting piece 3326 may be set to open along the Z direction toward one side of the air inlet contour line 3328. Based on this, the edge of the sixth connecting piece 3326 corresponding to the air inlet contour line 3328 may be set to be recessed along the Z direction toward the side where the air outlet contour line 3329 is located, so that the edge of the sixth connecting piece 3326 corresponding to the air inlet contour line 3328 may be set close to the corresponding mounting hole 333 in the Z direction, which is conducive to reducing the air flow resistance.

[0122] Correspondingly, continue to refer to Fig.19The edge of the sixth connecting piece 3326 corresponding to the air outlet contour line 3329 may be arranged to protrude along the Z direction toward the side away from the air inlet contour line 3328, so that the edge of the sixth connecting piece 3326 corresponding to the air outlet contour line 3329 may have a sufficient distance from the corresponding mounting hole 333 in the Z direction, which is conducive to increasing the refrigerant pipe 331 (such as Figure 7 The effective heat exchange area of ​​the refrigerant heat exchanger 33 is increased, thereby improving the heat exchange efficiency of the refrigerant heat exchanger 33.

[0123] It should be noted that, on the two side edges of the sixth connecting piece along the Z direction, the shape of the depression at the edge corresponding to the air inlet contour line 3328 can be a rectangle, a triangle, or an arc, and the shape of the depression at the edge corresponding to the air inlet contour line 3328 can also be the same or similar to the shape of the center line of the plurality of mounting holes 33 in the same row on the sixth connecting piece 3326. For the edge of the sixth connecting piece 3326 corresponding to the air outlet contour line 3329, it is only necessary to ensure that the edge shape and size are the same as those of the sixth connecting piece 3326 corresponding to the air inlet contour line 3328, and one of the two edges can be completely overlapped with the other after translation along the Z direction, and this application does not limit this.

[0124] In some embodiments, in order to improve the structural strength of the fin 332, as shown in FIG. Fig.19 As shown, the fin 332 may also include a plurality of reinforcing ribs 33213. The reinforcing ribs 33213 may be provided on one or more of the four connecting pieces or the seven connecting pieces, so that the reinforcing ribs 33213 located on one of the connecting pieces may extend in the direction of the air inlet contour line 3328 corresponding to the connecting piece, thereby improving the bending strength of the fin 332, so that the fin 332 may maintain a relatively flat planar structure. The reinforcing ribs 33213 may be a strip-shaped convex rib structure protruding toward one side of the fin 332 in the X direction.

[0125] For example, a reinforcing rib 33213 may be arranged at the angle between the first edge line 33211 and the air inlet contour line 3328 of the first connecting piece 3321, and the reinforcing rib 33213 extends in the direction of the air inlet contour line 3328. A reinforcing rib 33213 may also be arranged at the angle between the second edge line 33212 and the air inlet contour line 3328 of the fourth connecting piece 3324, and the reinforcing rib 33213 extends in the direction of the air inlet contour line 3328.

[0126] In addition, if a plurality of rows of mounting holes 333 are provided on the fin 332, a plurality of reinforcing ribs 33213 extending in the direction of the air inlet contour line 3328 may be arranged between two adjacent rows of mounting holes 333, and the plurality of reinforcing ribs 33213 may be arranged at intervals along the extending direction of the air inlet contour line 3328. It should be noted that, on the sixth connecting piece 3326, between two adjacent rows of mounting holes 333, the reinforcing ribs 33213 may be arranged extending along the Y direction.

[0127] In some embodiments, Fig.19 As shown, the fin 332 may also be provided with a plurality of heat insulation holes 33214, which may be strip holes extending in the direction of the corresponding air inlet contour line 3328. A plurality of heat insulation holes 33214 may be arranged between two adjacent rows of mounting holes 333 to block the plurality of refrigerant pipes 331 (such as Figure 7 As shown in the figure, heat loss between the refrigerant heat exchangers 33 can be avoided through heat conduction of the fins 332, which is beneficial to improving the heat exchange efficiency of the refrigerant heat exchanger 33.

[0128] In addition, if reinforcing ribs 33213 and heat-insulating holes 33214 are provided between two adjacent rows of mounting holes 333, multiple reinforcing ribs 33213 and multiple heat-insulating holes 33214 can be arranged alternately and at intervals along the direction corresponding to the air inlet contour line 3328, so that the heat exchange efficiency of the refrigerant heat exchanger 33 can be maintained and improved while the bending strength of the fins 332 is improved. It should be noted that, on the sixth connecting piece 3326, if a heat-insulating hole 33214 is provided between two adjacent rows of mounting holes 333, the heat-insulating hole can be arranged to extend along the Y direction.

[0129] In some embodiments, in order to reduce the lateral airflow on the air inlet side surface of the refrigerant heat exchanger 33, continue to refer to Fig.19 The fin 332 may also be provided with a plurality of slits 33215, and the plurality of slits 33215 may improve the contact heat exchange effect between the air and the fin 332, and is used to reduce the lateral airflow on the air inlet side surface of the refrigerant heat exchanger 33. Among the plurality of mounting holes 333 in a row, one or more slits 33215 may be provided between two adjacent mounting holes 333. For example, Fig. 20 As shown, Fig. 20 for Fig.19 A partial enlarged schematic diagram of the fin 332 is shown in FIG. The crack portion 33215 can be a protruding structure formed by a partial structure of the fin 332 through a stamping process, and opening structures are provided on opposite sides of the protruding structure in a direction perpendicular to the center line of the corresponding two mounting holes 333 to form an air flow channel.

[0130] Along the direction perpendicular to the center line of the two corresponding mounting holes 333, between two adjacent mounting holes 333, the protruding structures of the plurality of slit portions 33215 can be connected in sequence, and at this time, the protruding structures of the two adjacent slit portions 33215 can be protruded toward the opposite sides of the fin 332 along the X direction. In addition, between two adjacent mounting holes 333, the protruding structures of the plurality of slit portions 33215 can be arranged at intervals, and at this time, the protruding structures of the plurality of slit portions 33215 can be protruded toward the same side of the fin 332 along the X direction. It should be noted that the direction perpendicular to the center line of the two corresponding mounting holes 333 at a position other than the sixth connecting piece 3326 is the direction perpendicular to the air inlet contour line 3328 at the corresponding position.

[0131] Based on this, when the air flows between two fins 332 arranged adjacently along the X direction, part of the air can flow close to the fin 332 through the guidance of multiple crack portions 33215, which can improve the contact heat exchange effect between the air and the fin 332 and help reduce the lateral airflow on the air inlet side surface of the refrigerant heat exchanger 33.

[0132] Among them, in the Y direction, in the process that the air inlet contour line 3328 extends from the first connecting piece 3321 to the fourth connecting piece 3324, the air flow rate on the air inlet side of the refrigerant heat exchanger 33 gradually decreases. Based on this, when a plurality of slit portions 33215 are provided on the fin 332, the arrangement density of the slit portions 33215 on the fourth connecting piece 3324 can be made smaller than the arrangement density on the first connecting piece 3321. Correspondingly, the arrangement density of the slit portions 33215 on the seventh connecting piece 3327 can also be made smaller than the arrangement density on the first connecting piece 3321. Exemplarily, along the Y direction, from the first connecting piece 3321 to the seventh connecting piece 3327, the arrangement density of the slit portions 33215 on the fin 332 can be reduced in sequence. In this way, while improving the contact heat exchange effect between air and the fin 332 through the slit portions 33215 and reducing the lateral airflow on the air inlet side surface of the refrigerant heat exchanger 33, the fin structure can also be simplified to reduce production costs and processing difficulties.

[0133] Based on this, the refrigerant heat exchanger 33 made by the improved fins 332 of the above embodiment is installed in the shell 70 of the corresponding air duct machine. It can be known from the simulation test that Fig.21 As shown, Fig.21 for Fig.17 A wind field simulation diagram of an improved duct machine corresponding to the angle shown. In the left and right directions, the improved refrigerant heat exchanger 33 can reduce the lateral airflow at its air inlet side surface, and can even eliminate the lateral airflow. In this way, the fin sound generated by the fins 332 in the refrigerant heat exchanger 33 can be effectively reduced, thereby improving the user experience.

[0134] The refrigerant heat exchanger 33 composed of multi-fold fins 332 provided in the embodiment of the present application can be used in the indoor unit of the air conditioner 100 such as duct unit, wall-mounted unit, cabinet unit, etc., can also be used in the outdoor unit in special scenarios, and can also be used as an evaporator or condenser in an air-conditioning all-in-one unit, which is not limited in the present application.

[0135] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0136] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An air conditioner, characterized in that: include: case; A fan assembly, wherein the fan assembly is installed in the housing; and a refrigerant heat exchanger, the refrigerant heat exchanger being located in the housing, the fan assembly being used to drive air to flow through the refrigerant heat exchanger; the refrigerant heat exchanger comprising: refrigerant pipe; and a plurality of fins, wherein the fins are an integrated planar sheet structure, the plurality of fins are arranged at intervals along a first straight line direction, and the refrigerant pipe passes through the plurality of fins along the first straight line direction and is in contact with and connected to the plurality of fins; The fin includes a first connecting piece, a second connecting piece, a third connecting piece and a fourth connecting piece connected in sequence along a second straight line direction, and the second straight line direction intersects with the first straight line direction; along the third straight line direction, the angle formed by the second connecting piece and the third connecting piece is open to one side, and the angle formed by the first connecting piece and the second connecting piece and the angle formed by the third connecting piece and the fourth connecting piece are open to the other side, and the third straight line direction is perpendicular to the first straight line direction and the second straight line direction.

2. The air conditioner according to claim 1, characterized in that: The fin has an air inlet contour line and an air outlet contour line, the air inlet contour line and the air outlet contour line are two edges of the fin that are arranged opposite to each other in the third straight line direction, and the inner edge of the angle formed by the first connecting piece and the second connecting piece is a part of the air inlet contour line; The air inlet contour line and the air outlet contour line have the same shape and size, and the air inlet contour line and the air outlet contour line have the same spacing in the third straight line direction.

3. The air conditioner according to claim 2, characterized in that: The fin further has a first edge line and a second edge line. Along the second straight line direction, two oppositely disposed edges of the fin are the first edge line and the second edge line. The first edge line is an edge of one side of the first connecting piece away from the second connecting piece, and the second edge line is an edge of one side of the fourth connecting piece away from the third connecting piece. Along the second straight line direction, the first edge line is connected between the ends of the first connecting piece and the air inlet contour line and the air outlet contour line, and the second edge line is connected between the ends of the fourth connecting piece and the air inlet contour line and the air outlet contour line; and the first edge line is arranged parallel to the second edge line and extends along the third straight line direction.

4. The air conditioner according to claim 2, characterized in that: The value range of the first angle formed by the edge of the air inlet contour line at the first connecting piece and the direction of the third straight line is 110° to 150°; and / or, The value range of the second angle formed by the edge of the air inlet contour line at the fourth connecting piece and the third straight line direction is 110° to 150°; and / or, A value range of a third angle formed between an edge of the air inlet contour line at the first connecting piece and an edge of the air inlet contour line at the fourth connecting piece is 80° to 110°.

5. The air conditioner according to any one of claims 1 to 4, characterized in that: The fin further comprises: a fifth connecting piece, through which the first connecting piece is connected to the second connecting piece; a sixth connecting piece, located between the second connecting piece and the third connecting piece along the second straight line direction, one end of the sixth connecting piece being connected to an end of the second connecting piece away from the fifth connecting piece, and the other end of the sixth connecting piece being connected and installed to the third connecting piece; And a seventh connecting piece, the third connecting piece is also connected and installed with the fourth connecting piece through the seventh connecting piece.

6. The air conditioner according to claim 5, characterized in that: Each of the fins is provided with at least one row of mounting holes; In the case where the fin includes an air inlet contour line and an air outlet contour line, in the first connecting piece, the second connecting piece, the third connecting piece, the fourth connecting piece, the fifth connecting piece and the seventh connecting piece, a plurality of mounting holes in a row are arranged on the fin at intervals along the extension direction of the air inlet contour line; On the sixth connecting piece, along the third straight line direction, part of the mounting holes in a row are offset and arranged close to the air outlet contour line, so that the angle formed by the center connecting lines of at least three mounting holes on the sixth connecting piece is opened in the direction where the air inlet contour line is located; A plurality of fins are arranged at intervals along the first straight line direction, and the mounting holes on any two of the fins are aligned along the first straight line direction; the number of the refrigerant tubes is multiple and less than or equal to the number of the mounting holes on one fin; and one refrigerant tube extends along the first straight line direction and is inserted into the plurality of aligned mounting holes.

7. The air conditioner according to claim 6, characterized in that: In a plurality of the mounting holes in a row, the center distances of two adjacent mounting holes are the same and are both L; along the third straight line direction, the maximum distance between the edge of the sixth connecting piece corresponding to the air inlet contour line and the edge of the first connecting piece or the second connecting piece corresponding to the air inlet contour line is T, and T≥L is satisfied; and / or, The edges of the fifth connecting piece, the sixth connecting piece and the seventh connecting piece corresponding to the air inlet contour line are arranged parallel to the second straight line direction; or, Along the third straight line direction, the edge of the sixth connecting piece corresponding to the air inlet contour line is recessed toward the side where the air outlet contour line is located, and the edge of the sixth connecting piece corresponding to the air outlet contour line is convex toward the side away from the air inlet contour line.

8. The air conditioner according to claim 6, characterized in that: In the case where a plurality of mounting holes are provided on the fourth connecting piece; Among the plurality of mounting holes in a row, at least one mounting hole located on the fourth connecting piece is not plugged with the refrigerant pipe.

9. The air conditioner according to claim 6, characterized in that: The fins are also provided with a plurality of cracks for improving the contact heat exchange effect between the air and the fins; Among the plurality of mounting holes in a row, one or more crack portions are provided between two adjacent mounting holes, and the density of the crack portions on the fourth connecting piece and / or the seventh connecting piece is less than the density of the crack portions on the first connecting piece.

10. The air conditioner according to claim 3, characterized in that: In the case where the fin includes seven connecting pieces, namely, the first connecting piece, the fifth connecting piece, the second connecting piece, the sixth connecting piece, the third connecting piece, the seventh connecting piece and the fourth connecting piece, which are sequentially connected along the second straight line direction, the air inlet contour lines between two adjacent connecting pieces are connected by a rounded structure or a chamfered structure; and / or, Along the second straight line direction, one end of the air inlet contour line close to the first edge line is connected to the first edge line after being bent through a rounded structure or a chamfered structure; and / or, Along the second straight line direction, one end of the air inlet contour line close to the second edge line is bent through a rounded structure or a chamfered structure and then connected to the second edge line.

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