Duct type air conditioner

Abstract

The invention discloses a duct type air conditioner, relates to the technical field of air conditioning, and is used for solving the problem that an existing duct type air conditioner is small in air outlet volume. The duct type air conditioner comprises a shell, a fan and a heat exchanger. A containing cavity is formed in the shell, and an air inlet and an air outlet which communicate with the containing cavity are formed in the shell. The fan is arranged in the containing cavity. The heat exchanger is arranged in the containing cavity and located on the side, close to the air outlet, of the fan. The heat exchanger comprises heat exchange fins. The two ends of the heat exchange fins are bent in the direction close to the air outlet, so that the heat exchange fins protrude towards the side of the draught fan. The duct type air conditioner is used for adjusting the indoor temperature.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a duct air conditioner. Background Art

[0002] The indoor unit of the duct air conditioner is a duct unit. Due to the advantages of the duct unit such as concealed installation and easy coordination with home decoration ceiling, the duct air conditioner has better aesthetics when installed indoors.

[0003] When the air conditioner is running, inside the duct unit, the impeller of the fan assembly rotates so that the air near the shell enters the shell. The air exchanges heat with the heat exchanger while passing through the heat exchanger. The air after heat exchange can flow out of the shell and adjust the temperature and / or humidity near the installation area.

[0004] However, the current air duct air conditioner has a small air volume and cannot meet user needs. Summary of the invention

[0005] The present application provides a duct air conditioner, which is used to solve the problem of small air output volume of existing duct air conditioners.

[0006] In order to achieve the above purpose, this application adopts the following technical solutions:

[0007] The embodiment of the present application provides a duct air conditioner, comprising a housing, a fan and a heat exchanger. A housing cavity is formed inside the housing, and an air inlet and an air outlet connected to the housing cavity are provided. The fan is arranged in the housing cavity. The heat exchanger is arranged in the housing cavity, and is located on a side of the fan close to the air outlet. The heat exchanger includes heat exchange fins. Both ends of the heat exchange fins are bent toward the direction close to the air outlet, so that the heat exchange fins protrude toward one side of the fan.

[0008] The air duct machine provided in the embodiment of the present application has a heat exchanger located on the side of the fan close to the air outlet. Therefore, the external air can enter the installation cavity from the air inlet driven by the fan, and be blown out from the air outlet after heat exchange with the heat exchanger. The air blown out after heat exchange in the heat exchanger can adjust the indoor temperature. Since the heat exchange fins protrude toward one side of the fan, the airflow inside the shell is not easy to form eddies at the heat exchange fins of the heat exchanger, and the airflow can be blown out from the air outlet more effectively, thereby increasing the air output of the air duct machine. At the same time, the wind speed distribution inside the air duct machine is relatively uniform, so that the wind resistance generated inside the air duct machine is relatively small, thereby increasing the air volume of the entire air duct machine.

[0009] In some embodiments, the heat exchange fin includes a first connecting piece, a second connecting piece and a third connecting piece. The first connecting piece is arranged in an accommodating cavity at an angle relative to the air outlet. Along the first direction, the first connecting piece gradually moves away from the air outlet. Along the first direction, the second connecting piece is located on one side of the first connecting piece, and one end of the second connecting piece is connected to an end of the first connecting piece relatively far away from the air outlet, and the second connecting piece is arc-shaped and protrudes toward a direction close to the fan. The third connecting piece is located on a side of the second connecting piece away from the first connecting piece, and is arranged in an accommodating cavity at an angle relative to the air outlet. Along the first direction, the third connecting piece gradually approaches the air outlet, and an end relatively far away from the air outlet is connected to the other end of the second connecting piece. Wherein, the first direction is parallel to the plane where the air outlet is located.

[0010] In some embodiments, the second connecting piece is arc-shaped.

[0011] In some embodiments, along a cross section perpendicular to the plane where the air outlet is located and parallel to the first direction, a line connecting the midpoint of the arc of the second connecting piece and the center of the circle corresponding to the arc of the second connecting piece is perpendicular to the plane where the air outlet is located.

[0012] In some embodiments, along a cross section perpendicular to the plane where the air outlet is located and parallel to the first direction, there is a gap between the projection point of the center of the arc corresponding to the second connecting piece on the plane where the air outlet is located and the midpoint of the air outlet along the first direction.

[0013] In some embodiments, along a cross section perpendicular to the plane where the air outlet is located and parallel to the first direction, the absolute value of the difference between the projection point of the center point of the arc of the second connecting plate on the plane where the air outlet is located and the midpoint of the air outlet along the first direction is less than or equal to one quarter of the size of the air outlet along the first direction.

[0014] In some embodiments, the duct machine also includes a middle partition. The middle partition is arranged in the accommodating cavity, between the fan and the heat exchange fins, and arranged opposite to the air outlet. A fan flow port is opened on the middle partition. The exhaust port of the fan is arranged opposite to the fan flow port. Among them, along the cross section perpendicular to the plane where the air outlet is located and in the first direction, the cross-sectional area between the first connecting piece and the middle partition is S1, the cross-sectional area between the second connecting piece and the middle partition is S2, and the cross-sectional area between the third connecting piece and the middle partition is S3. S1 / S2 is (0.7+0.02n), S3 / S2 is (1.04-0.03n); n is zero or a positive integer, and S1 / S2 is less than or equal to 0.96, and S3 / S2 is greater than or equal to 0.65.

[0015] In some embodiments, the value of S1 / S2 is greater than the value of S3 / S2.

[0016] In some embodiments, the value of S1 / S2 is 0.96; the value of S3 / S2 is 0.65.

[0017] In some embodiments, the angles between the first connecting piece and the third connecting piece and the plane where the air outlet is located are 45° to 60°. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the connection structure of a duct air conditioner provided in an embodiment of the present application;

[0019] 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.

[0020] Figure 3 for Figure 1 A schematic diagram of a connection structure in which no four-way valve is provided between the compressor and the outdoor heat exchanger and the indoor heat exchanger as shown in FIG.

[0021] Figure 4 A side view of an indoor unit of a first duct-type air conditioner provided in an example of the present application;

[0022] Figure 5 A structural schematic diagram of a duct machine in the related art;

[0023] Figure 6 for Figure 5 The wind direction flow diagram inside the duct machine is shown;

[0024] Figure 7 A schematic diagram of the structure of a duct machine provided in an embodiment of the present application;

[0025] Figure 8 for Figure 7 The wind direction flow diagram of the duct machine shown;

[0026] Fig. 9 A schematic diagram of the structure of another air duct machine provided in an embodiment of the present application;

[0027] Fig.10 A structural schematic diagram of another duct machine provided in an embodiment of the present application;

[0028] Fig.11 for Fig.10 The wind direction flow diagram of the duct machine shown;

[0029] Fig.12 for Figure 7 One of the wind speed flow direction simulation diagrams of the duct machine along a cross section perpendicular to the first direction;

[0030] Fig.13 for Figure 7 The second simulation diagram of wind speed and flow direction of the duct fan along the cross section perpendicular to the first direction;

[0031] Fig.14 for Fig.10 One of the wind speed flow direction simulation diagrams of the duct machine along a cross section perpendicular to the first direction;

[0032] Fig.15 for Fig.10 The second simulation diagram of wind speed and flow direction of the duct fan along the cross section perpendicular to the first direction;

[0033] Fig.16 One of the wind speed simulation diagrams of the duct air conditioner provided in the embodiment of the present application;

[0034] Fig.17 This is the second wind speed simulation diagram of the duct air conditioner provided in the embodiment of the present application.

[0035] Reference numerals:

[0036] 010-duct machine; 011-housing; 012-heat exchanger; 013-fan; 014-air outlet;

[0037] 100-air conditioner; 11-compressor; 12-four-way valve; 13-outdoor heat exchanger; 14-pressure reducer; 15-indoor heat exchanger; 16-gas-liquid separator; 17-oil separator; 20-outdoor unit; 30-indoor unit;

[0038] 40-duct machine; 41-housing; 411-accommodating chamber; 412-air inlet; 413-air outlet; 42-fan; 421-volute; 4211-exhaust outlet; 422-centrifugal impeller; 423-volute tongue; 43-heat exchanger; 431-heat exchange fins; 4311-first connecting piece; 4312-second connecting piece; 4313-third connecting piece; 44-middle partition. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In the description of the present application, it should be understood that the terms, "up", "down", "left", "right", "front", "back", "inside", "outside", "center", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0042] In the description of this application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "multiple" means two or more.

[0043] In the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0044] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0045] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0046] An air conditioner is a device that can adjust and control the temperature, humidity and circulating air of the ambient air in a building or structure.

[0047] like Figure 1As shown, the present application provides a duct air conditioner (hereinafter referred to as air conditioner 100), which may include a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, a pressure reducer 14, and an indoor heat exchanger 15. Exemplarily, the four-way valve 12 may have a first port A, a second port B, a third port C, and a fourth port D, and the compressor 11 may have a return air end and an outlet air end, such as Figure 1 One end of the air flowing into the compressor 11 along the arrow direction is the return air end of the compressor, and the other end is the outlet air end of the compressor 11.

[0048] The return air end of the compressor 11 can be connected to the first port A of the four-way valve, the outlet air end of the compressor 11 can be connected to the second port B of the four-way valve, the third port C of the four-way valve can be connected to one end of the outdoor heat exchanger 13, the other end of the outdoor heat exchanger 13 can be connected to one end of the indoor heat exchanger 15 through the pressure reducer 14, and the other end of the indoor heat exchanger 15 can be connected to the fourth port D of the four-way valve.

[0049] Reference Figure 1 The air conditioner 100 may include an outdoor unit 20 and an indoor unit 30. For example, the compressor 11, the four-way valve 12 and the outdoor heat exchanger 13 may be part of the outdoor unit 20, and the corresponding indoor heat exchanger 15 may be part of the indoor unit 30. The pressure reducer 14 may be a capillary tube or an electronic expansion valve throttling device. The pressure reducer 14 may be Figure 1 As shown, the pressure reducer 14 can be installed in the indoor unit 30, or it can be installed in the refrigerant pipeline between the outdoor unit 20 and the indoor unit 30. It is only necessary to make the pressure reducer 14 between the indoor heat exchanger 15 and the outdoor heat exchanger 13 along the flow direction of the refrigerant.

[0050] Based on this, driven by the compressor 11, the refrigerant can circulate between the indoor unit 30 and the outdoor unit 20 through the pipeline and produce a reversible phase change. While the refrigerant produces a phase change, it can release or absorb heat through the heat exchanger.

[0051] In this way, the refrigerant can exchange heat with the surrounding medium (such as air) in the outdoor unit 20 through the outdoor heat exchanger 13, thereby releasing heat and heating the surrounding air (or absorbing heat to cool the surrounding air). The refrigerant can exchange heat with the surrounding air in the indoor unit 30 through the indoor heat exchanger 15, thereby absorbing heat to cool the surrounding air (or releasing heat to heat the surrounding air), thereby achieving efficient cooling (or heating) of the air conditioner 100.

[0052] The air conditioner 100 can be configured as an outdoor unit 20 driving an indoor unit 30 to circulate the refrigerant, such as a one-to-one structure, or a high-power outdoor unit 20 driving multiple indoor units 30 to circulate the refrigerant, such as a household central air conditioner with a one-to-many structure. Alternatively, the air conditioner 100 can be configured as multiple outdoor units 20 connected in parallel and driving the indoor units 30 to circulate the refrigerant, such as a large air conditioning unit.

[0053] By setting the four-way valve 12, the operation mode of the air conditioner 100 can be flexibly adjusted between the hot-cooling condition and the heating condition, so that the air conditioner 100 can be applied to more usage scenarios.

[0054] When the air conditioner 100 is in cooling or dehumidification mode, Figure 1 Taking the solid arrow shown in FIG. 1 as an example, the four-way valve 12 can be adjusted to connect the second port B and the third port C, and to connect the fourth port D and the first port A.

[0055] In this way, the high-pressure gaseous refrigerant compressed by the compressor 11 can flow from the outlet end through the second port B and the third port C of the four-way valve 12 to the outdoor heat exchanger 13, so that the high-temperature and high-pressure gaseous refrigerant can be liquefied and release heat at the outdoor heat exchanger 13 to heat the air near the outdoor heat exchanger 13.

[0056] Subsequently, under the action of the pressure reducer 14, the pressure of the liquid refrigerant passing through the pressure reducer 14 and flowing into the indoor heat exchanger 15 is reduced, so that the liquid refrigerant can absorb heat and vaporize at the indoor heat exchanger 15, thereby exchanging and transferring heat between the outdoor heat exchanger 13 and the indoor heat exchanger 15 and cooling the air near the indoor heat exchanger 15. The refrigerant flowing out of the indoor heat exchanger 15 after vaporization can flow through the fourth port D and the first port A of the four-way valve 12 in sequence, and then the gaseous refrigerant can be sucked into the compressor 11 through the return air end and compressed, thereby realizing the circulation of the refrigerant.

[0057] When the air conditioner 100 is in the heating state, Figure 2 Taking the solid arrow shown in FIG. 1 as an example, the four-way valve 12 can be adjusted to connect the second port B and the fourth port D, and to connect the third port C and the first port A.

[0058] In this way, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 11 can flow from the outlet end through the second port B and the fourth port D of the four-way valve 12 to the Figure 2 The indoor heat exchanger 15 shown in the figure allows the high-temperature and high-pressure gaseous refrigerant to liquefy and release heat at the indoor heat exchanger 15 to heat the air near the indoor heat exchanger 15.

[0059] Then, under the action of the pressure reducer 14, the Figure 2 The pressure of the liquid refrigerant at the outdoor heat exchanger 13 is reduced, so that the liquid refrigerant can absorb heat and vaporize at the outdoor heat exchanger 13, thereby exchanging and transferring heat between the outdoor heat exchanger 13 and the indoor heat exchanger 15 and cooling the air around the outdoor heat exchanger 13. The vaporized refrigerant can flow through the third port C and the first port A of the four-way valve 12 in sequence, and then the gaseous refrigerant can be sucked into the compressor 11 through the return air end and compressed, thereby realizing the circulation of the refrigerant.

[0060] In order to prevent the gaseous refrigerant sucked into the compressor 11 from being mixed with liquid refrigerant or impurities, Figure 3 As shown, the air conditioner 100 may further include a gas-liquid separator 16, which may be installed between the first port A of the four-way valve 12 and the return air end of the compressor 11, so that the first port A may be connected and conducted with the return air end of the compressor 11 through the gas-liquid separator 16. In this way, when the gaseous refrigerant mixed with impurities such as liquid refrigerant or lubricating oil flows to the return air end of the compressor 11 through the gas-liquid separator 16, the gas-liquid separator 16 may separate non-gaseous impurities (such as liquid refrigerant, liquid lubricating oil or other impurities) to prevent the above impurities from entering the compressor 11 and affecting the stable operation of the compressor 11.

[0061] Continue to refer to Figure 3 The air conditioner 100 may further include an oil separator 17, and the outlet end of the compressor 11 and the second port B of the four-way valve 12 may also be connected and conducted through the oil separator 17. 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 17, thereby preventing the lubricating oil from adhering to the inner walls of the outdoor heat exchanger 13 and the indoor heat exchanger 15 when the refrigerant flows through the outdoor heat exchanger 13 and the indoor heat exchanger 15, so that the indoor heat exchanger 15 and the outdoor heat exchanger 13 have a higher heat exchange efficiency.

[0062] In some other embodiments, it is not necessary to provide a four-way valve.

[0063] like Figure 4 As shown, the air outlet of the compressor 11 can be connected to one end of the pressure reducer 14 through the outdoor heat exchanger 13, and the air return end of the compressor 11 can be connected to the other end of the pressure reducer 14 through the gas-liquid separator 16 and the indoor heat exchanger 15 in sequence. So that the refrigerant can circulate between the compressor 11, the outdoor heat exchanger 13, the pressure reducer 14, the indoor heat exchanger 15, the gas-liquid separator 16 and the compressor 11, at this time, the outdoor heat exchanger 13 can be used to heat the nearby air, and the indoor heat exchanger 15 can be used to cool the nearby air, so that the air conditioner 100 operates in a cooling condition or a dehumidification condition (i.e., a cooling-only mode air conditioner).

[0064] It should be noted that the indoor unit 30 of the air conditioner 100 may be a duct structure, and the indoor unit 30 of the duct structure is usually installed and arranged in conjunction with a ceiling structure, such as concealed installation of the indoor unit 30 in conjunction with a ceiling structure. This has the advantages of concealed installation, easy coordination with a home ceiling, and good aesthetics.

[0065] In related technologies, such as Figure 5 As shown, Figure 5 FIG. 1 is a schematic diagram of a duct machine 010 of the related art. The duct machine 010 includes a housing 011 and a heat exchanger 012 disposed in the housing 011. The heat exchanger 012 is located on a side close to the air outlet 014. Figure 5 As shown, the heat dissipation fins 013 of the heat exchanger 012 protrude toward the direction close to the air outlet 014 .

[0066] However, the heat exchanger 012 causes the air flow area at the air outlet 014 of the duct unit 010 to be narrow, resulting in large air duct resistance and high flow rate, which is easy to interact with the air outlet grille, resulting in high air outlet noise. Figure 6 As shown, Figure 6 for Figure 5 As shown in the wind direction flow diagram inside the duct air conditioner 010, a larger vortex is formed on the lower side of the heat exchanger 012 on the windward side, which affects the air output of the duct air conditioner 010, and the air output of the duct air conditioner 010 as a whole is relatively small.

[0067] Based on this, the embodiment of the present application provides a duct machine, such as Figure 7 As shown, Figure 7 The present invention provides a schematic structural diagram of an air duct unit 40 , which includes a housing 41 , a fan 42 and a heat exchanger 43 .

[0068] like Figure 7 As shown, the housing 41 forms a housing chamber 411 inside, and is provided with an air inlet 412 and an air outlet 413 communicating with the housing chamber 411. Thus, external air can enter the housing chamber 411 through the air inlet 412, and flow out of the housing chamber 411 through the air outlet 413.

[0069] It is understandable that the housing 41 can be designed in different shapes. For example, Figure 7 As shown, the outer shape of the housing 41 can be set to be a rectangular parallelepiped. Figure 7 The up and down direction shown may be the height direction of the housing 41. Figure 7 The left-right direction shown may be the width direction of the housing 41 .

[0070] based on Figure 7The housing 41 shown in the figure, the air inlet 412 and the air outlet 413 of the housing 41 can be arranged in the housing 41 along the width direction (ie Figure 7 In addition, in order to better inlet and outlet air, the air inlet 412 and the air outlet 413 can be in the shape of long strips, along the length direction of the housing 41 (i.e., perpendicular to the left and right directions). Figure 7 The cross section extends in the direction of the cross section shown.

[0071] Continue to refer to Figure 7 The fan 42 and the heat exchanger 43 can be arranged in the accommodating chamber 411, and the heat exchanger 43 can be located on the side of the fan 42 close to the air outlet 413. The fan 42 can be used to allow external air to enter the accommodating chamber 411 through the air inlet 412 and blow out from the air outlet 413.

[0072] Thus, the external air can enter the installation cavity from the air inlet 412 driven by the fan 42, and blow out from the air outlet 413 after heat exchange with the heat exchanger 43. The air blown out after heat exchange by the heat exchanger 43 can adjust the indoor temperature.

[0073] For example, Figure 7 As shown, the air inlet 412 and the air outlet 413 of the housing 41 are arranged on two side walls of the housing 41 that are arranged opposite to each other in the width direction. Accordingly, the fan 42 and the heat exchanger 43 can be arranged inside the accommodating cavity 411 at intervals in the width direction of the housing 41, and the heat exchanger 43 is located on the side of the fan 42 close to the air outlet 413.

[0074] It is understandable that the type of the fan 42 can be selected according to actual conditions. Exemplarily, the fan 42 can be a centrifugal fan. The exhaust port 4211 of the fan 42 can be directed toward the heat exchanger 43. Thus, the fan 42 can more effectively blow the external air toward the heat exchanger 43 and blow it out from the air outlet 413.

[0075] In addition, since the centrifugal fan has the characteristics of small size, low noise and high wind pressure, it is beneficial to increase the air circulation in the duct machine 40 with limited height space.

[0076] like Figure 7 As shown, when the fan 42 is a centrifugal fan, the fan 42 may include a volute 421 and a centrifugal impeller 422, and the centrifugal impeller 422 is installed in the volute 421. The volute 421 has an air outlet 4211 and an air inlet (not shown in the figure).

[0077] like Figure 7 As shown, the exhaust port 4211 may be located at a position of the volute 421 close to the volute tongue 423, and the exhaust port 4211 may be arranged toward the heat exchanger 43. Figure 7 The height direction of the housing 41 (i.e. Figure 7 As shown in the figure, the upper and lower parts can be arranged close to the upper side of the accommodating cavity 411, that is, Figure 7 As shown, the air outlet 4211 is disposed at the upper left side of the volute 421 .

[0078] The axial direction of the centrifugal impeller 422 may be parallel to Figure 7 The length direction of the housing 41 shown (i.e. perpendicular to Figure 7 In this way, the centrifugal impeller 422 can rotate around the axial direction of the centrifugal impeller 422. Along the axial direction of the centrifugal impeller 422, the air inlet of the volute 421 can be arranged on the side wall of one side of the volute 421.

[0079] It is understandable that a volute 421 and a corresponding centrifugal impeller 422 may be installed in the accommodating chamber 411. Multiple volutes 421 and corresponding centrifugal impellers 422 may also be installed. Figure 7 , along the perpendicular Figure 7 In the direction of the cross section shown, a plurality of spaced-apart volutes 421 may be arranged, and the number of centrifugal impellers 422 may be set in a one-to-one correspondence with the number of volutes 421 , that is, one centrifugal impeller 422 may be installed in one volute 421 .

[0080] For example, the number of the centrifugal impeller 422 and the volute 421 can be two, three, four or more, which can be determined according to the position of the volute 421 perpendicular to the Figure 7 The dimensions of the cross section shown are the same as the dimensions of the heat exchanger 43 in the direction perpendicular to Figure 7 The dimensions in the direction of the cross section shown in the figure flexibly set the number of volutes 421. In this way, by multiple Figure 7 The centrifugal fans spaced in the direction of the cross section blow air toward the heat exchanger 43, which is beneficial to improve the heat exchanger 43 in a direction perpendicular to the cross section. Figure 7 The uniformity of wind in the direction of the cross section shown.

[0081] like Figure 7 As shown, the heat exchanger 43 includes heat exchange fins 431 and heat exchange tubes (not shown in the figure). There may be multiple heat exchange fins 431, and the multiple heat exchange fins 431 may be arranged at intervals in a direction parallel to the air outlet 413. The heat exchange tubes may be passed through the multiple heat exchange fins 431.

[0082] For example, refer to Figure 7 , the plurality of heat exchange fins 431 may be arranged along Figure 7 The length direction of the housing 41 (i.e. perpendicular to Figure 7 Accordingly, the heat exchange tubes extend along the length direction of the shell 41, pass through the plurality of heat exchange fins 431 in sequence, and are arranged on the plurality of heat exchange fins 431.

[0083] Continue to refer to Figure 7 , the two ends of the heat exchange fin 431 can be bent toward the direction close to the air outlet 413, so that the heat exchange fin 431 is convex toward the fan 42. Figure 8 As shown, Figure 8 for Figure 7 As shown in the wind direction flow diagram of the air duct machine 40, since the heat exchange fins 431 protrude toward the side of the fan 42, the air flow inside the shell 41 is not easy to form vortices at the heat exchange fins 431 of the heat exchanger 43, and the air flow can be blown out from the air outlet 413 more effectively, thereby making the air output of the air duct machine 40 larger.

[0084] like Figure 7 As shown, in some embodiments, the heat exchange fin 431 may include a first connecting piece 4311, a second connecting piece 4312, and a third connecting piece 4313. The first connecting piece 4311 is disposed in the accommodating cavity 411 obliquely relative to the air outlet 413, and along the first direction, the first connecting piece 4311 gradually moves away from the air outlet 413. The first direction is parallel to the plane where the air outlet 413 is located.

[0085] For example, Figure 7 As shown, the first connecting piece 4311 is arranged along the height direction of the housing 41 (ie Figure 7 Correspondingly, the first direction can be Figure 7 In the direction from top to bottom shown, the first connecting piece 4311 is arranged tilted toward the lower right.

[0086] Along the first direction, the second connecting piece 4312 is located on one side of the first connecting piece 4311 and is connected to an end of the first connecting piece 4311 relatively far from the air outlet 413. The second connecting piece 4312 is arc-shaped and protrudes toward the direction close to the fan 42. For example, Figure 7 As shown, the second connecting piece 4312 can be located below the first connecting piece 4311 .

[0087] The third connecting piece 4313 is located on a side of the second connecting piece 4312 away from the first connecting piece 4311, and is disposed in the accommodating cavity 411 obliquely relative to the air outlet 413. Along the first direction, the third connecting piece 4313 gradually approaches the air outlet 413, and one end relatively away from the air outlet 413 is connected to the other end of the second connecting piece 4312. For example, Figure 7 As shown, the third connecting piece 4313 is arranged to be tilted toward the upper right.

[0088] like Figure 7As shown, since the first connecting piece 4311 and the second connecting piece 4312 are arranged in the accommodating chamber 411 obliquely relative to the air outlet 413, when the size of the accommodating chamber 411 along the first direction is small, the size of the first connecting piece 4311 and the second connecting piece 4312 can be made larger, thereby making the size of the heat exchange fin 431 larger, thereby improving the heat exchange efficiency of the heat exchanger 43. Since the second connecting piece 4312 is arc-shaped and protrudes toward the air outlet 413, the heat exchange fin 431 can be made to protrude toward the direction close to the fan 42 as a whole.

[0089] Of course, in other embodiments, such as Fig. 9 As shown, Fig. 9 This is a structural diagram of another air duct unit 40 provided in an embodiment of the present application, wherein the heat exchange fin 431 may also only include a first connecting piece 4311 and a third connecting piece 4313. In this case, the heat exchange fin 431 has a simple structure and is more convenient to manufacture.

[0090] In some embodiments, the second connecting piece 4312 may be in an arc shape. When the second connecting piece 4312 is in an arc shape, the shape of the second connecting piece 4312 is smoother. Of course, the second connecting piece 4312 may also be a non-arc sheet structure.

[0091] In some embodiments, along a cross section perpendicular to the plane where the air outlet 413 is located and parallel to the first direction, a line connecting the midpoint of the arc of the second connecting piece 4312 and the center of the circle corresponding to the arc of the second connecting piece 4312 is perpendicular to the plane where the air outlet 413 is located.

[0092] For example, Figure 7 As shown, Figure 7 The cross section shown is perpendicular to the plane where the air outlet 413 is located and parallel to the first direction. The midpoint of the arc of the second connecting piece 4312 is A, the center of the arc of the second connecting piece 4312 is O, and the line connecting the two is perpendicular to the plane S where the air outlet 413 is located.

[0093] like Figure 7 As shown, the line between the midpoint A of the arc of the second connecting piece 4312 and the center O of the arc corresponding to the second connecting piece 4312 is perpendicular to the plane where the air outlet 413 is located. In this way, there will be no overlapping parts between the first connecting piece 4311, the second connecting piece 4312 and the third connecting piece 4313 in the direction perpendicular to the plane where the air outlet 413 is located. At this time, the wind blown by the fan 42 from the side of the heat exchange fin 431 away from the air outlet 413 to the heat exchange fin 431 can directly dissipate heat with the first connecting piece 4311, the second connecting piece 4312 or the third connecting piece 4313 at different positions, thereby ensuring the heat exchange efficiency of the heat exchange fin 431.

[0094] Of course, in other embodiments, the line between the midpoint A of the arc of the second connecting piece 4312 and the center O of the circle corresponding to the arc of the second connecting piece 4312 may not be perpendicular to the plane where the air outlet 413 is located.

[0095] In some embodiments, the angle between the first connecting piece 4311 and the third connecting piece 4313 and the plane where the air outlet 413 is located can be 45° to 60°. Based on this solution, the heat exchange fin 431 can have a relatively small height along the first direction, and the length of the first connecting piece 4311 and the third connecting piece 4313 can also be set to be relatively long, so as to facilitate heat exchange.

[0096] like Figure 7 As shown, one end of the first connecting piece 4311 close to the air outlet 413 and one end of the third connecting piece 4313 close to the air outlet 413 can respectively abut against the inner wall of the housing 41. The shortest distance between one end of the first connecting piece 4311 close to the air outlet 413 and one end of the third connecting piece 4313 close to the air outlet 413 and the midpoint B of the air outlet 413 along the first direction can be equal, that is, Figure 7 As shown, h1=h2.

[0097] based on Figure 7 In the scheme shown, the second connecting piece 4312 in the heat exchange fin 431 is a symmetrical arc shape, and the length relationship between the first connecting piece 4311 and the third connecting piece 4313 in the shell 41 is related to the positional relationship between the midpoint of the air outlet 413 along the first direction and the center of the arc of the second connecting piece 4312.

[0098] When the midpoint of the air outlet 413 along the first direction coincides with the projection point of the center of the arc of the second connecting piece 4312 on the plane where the air outlet 413 is located, the lengths of the first connecting piece 4311 and the third connecting piece 4313 are equal.

[0099] When the center of the arc corresponding to the second connecting piece 4312 is the projection point on the plane where the air outlet 413 is located, and is located above the midpoint of the air outlet 413 along the first direction, as shown in FIG. Fig.10 As shown, Fig.10 This is a structural diagram of another duct machine 40 provided in an embodiment of the present application, in which the length of the third connecting piece 4313 is greater than the length of the first connecting piece 4311. Fig.11 As shown, Fig.11 for Fig.10 As shown in the wind direction flow diagram of the air duct machine, it is not easy to form a vortex at the heat exchanger 43, and the wind inside the shell 41 can be blown out better, ensuring the air volume of the air duct machine 40.

[0100] When the center of the arc corresponding to the second connecting piece 4312 is projected on the plane where the air outlet 413 is located, and is located below the midpoint of the air outlet 413 along the first direction, as shown in FIG. Figure 7 As shown, the length of the first connecting piece 4311 is smaller than the length of the third connecting piece 4313 .

[0101] In addition, if Figure 8 and Fig.10 As shown, the embodiment of the present application provides an Figure 8 and Fig.10 The cross-sectional arrangement shown in FIG. 1 shows that a plurality of heat exchange fins 431 are arranged vertically. Figure 8 and Fig.10 When the airflow from the fan 42 blows from the left side to the heat exchange fin 431 on the right side, the wind directly blowing on the heat exchange fin 431 will be deflected toward the interval between two adjacent heat exchange fins 431, forming an airflow angle, thereby reducing the probability of fin sound.

[0102] like Fig.12 and Fig.13 As shown, Fig.12 for Figure 7 One of the wind speed flow direction simulation diagrams of the air duct machine 40 along the cross section perpendicular to the first direction is shown, Fig.13 for Figure 7 The second simulation diagram of the wind speed flow direction of the air duct machine 40 along the cross section perpendicular to the first direction is shown, wherein Fig.13 As shown, there is an area with lower wind speed in the heat exchanger when the fan 42 blows wind toward the heat exchanger. Fin sound is not easily generated in this area with lower wind speed, so that the probability of fin sound generated by the heat exchanger 43 is lower.

[0103] Similar, such as Fig.14 and Fig.15 As shown, Fig.14 for Fig.10 One of the wind speed flow direction simulation diagrams of the duct machine 40 along the cross section perpendicular to the first direction is shown, Fig.15 for Fig.10 The second simulation diagram of the wind speed flow direction of the air duct machine 40 along the cross section perpendicular to the first direction is shown, wherein Fig.15 As shown, the wind blown by the fan 42 to the heat exchanger has a relatively low wind speed area in the heat exchanger (i.e. Fig.15 In the middle dotted box), fin sound is not easily generated in this area with lower wind speed, so the probability of fin sound generated by the heat exchanger 43 is low.

[0104] It can be seen from this that when the length of the first connecting piece 4311 in the heat exchange fin 431 is greater than or less than the length of the third connecting piece 4313 , the probability of the air duct unit 40 generating fin sound is low.

[0105] In some embodiments, along a cross section perpendicular to the plane where the air outlet 413 is located and parallel to the first direction, there is a gap between the projection point of the center of the arc corresponding to the second connecting piece 4312 on the plane where the air outlet 413 is located and the midpoint of the air outlet 413 along the first direction.

[0106] based on Figure 7 and Fig.10 In the solution shown, when the center of the arc corresponding to the second connecting piece 4312 is projected on the plane where the air outlet 413 is located, and there is a gap between the midpoint of the air outlet 413 along the first direction, the overall air volume of the air duct unit 40 can be increased. The above effect is exemplarily described below.

[0107] In some embodiments, Fig.10 As shown, the air duct machine 40 also includes a middle partition 44. The middle partition 44 is arranged in the accommodating chamber 411, between the fan 42 and the heat exchange fins 431, and arranged opposite to the air outlet 413. A fan flow opening (not shown in the figure) is opened on the middle partition 44. The exhaust port 4211 of the fan 42 is arranged opposite to the flow opening of the fan 42. Exemplarily, the middle partition 44 is arranged in the accommodating chamber 411 in parallel with the plane where the air outlet 413 is located.

[0108] Among them, along the cross section perpendicular to the plane where the air outlet 413 is located and parallel to the first direction, the cross-sectional area between the first connecting piece 4311 and the middle partition 44 is S1, the cross-sectional area between the second connecting piece 4312 and the middle partition 44 is S2, and the cross-sectional area between the third connecting piece 4313 and the middle partition 44 is S3.

[0109] The relationship between the above S1, S2, S3 and the air volume of the duct unit 40 is shown in Table 1:

[0110] Table 1

[0111]

[0112]

[0113] It can be seen from Table 1 that when the heat exchange fins 431 protrude toward the direction close to the fan 42, the overall air volume (flow) of the duct air conditioner 40 is increased. Therefore, the duct air conditioner 40 provided in the embodiment of the present application can increase the overall air volume of the duct air conditioner 40.

[0114] In addition, based on Fig.10 In the scheme shown, when the value of S1 / S2 is equal to the value of S3 / S2, the projection point of the center of the arc corresponding to the second connecting piece 4312 on the plane where the air outlet 413 is located coincides with the midpoint of the air outlet 413 along the first direction.

[0115] Therefore, it can be seen from Table 1 that along the cross section perpendicular to the plane where the air outlet 413 is located and parallel to the first direction, when there is a gap between the projection point of the center of the arc corresponding to the second connecting piece 4312 on the plane where the air outlet 413 is located and the midpoint of the air outlet 413 along the first direction, the overall air volume of the duct unit 40 is improved.

[0116] In some embodiments, along a cross section perpendicular to the plane where the air outlet 413 is located and parallel to the first direction, the absolute value of the difference between the projection point of the center point of the arc corresponding to the second connecting piece 4312 on the plane where the air outlet 413 is located and the midpoint of the air outlet 413 along the first direction is less than or equal to one quarter of the size of the air outlet 413 along the first direction.

[0117] When the absolute value of the difference between the projection point of the center of the arc corresponding to the second connecting piece 4312 on the plane where the air outlet 413 is located and the midpoint of the air outlet 413 along the first direction is within the above range, the length difference between the first connecting piece 4311 and the third connecting piece 4313 is small, which facilitates the manufacture of the heat exchange fin 431. When the absolute value of the above difference is too large, the size difference between the first connecting piece 4311 and the third connecting piece 4313 is large, which easily leads to a narrow angle between the shell 41 and the heat exchanger 43, causing process problems.

[0118] In some embodiments, S1 / S2 is (0.7+0.02n), S3 / S2 is (1.04-0.03n); n is zero or a positive integer, and S1 / S2 is less than or equal to 0.96, and S3 / S2 is greater than or equal to 0.65. When S1 / S2 and S3 / S2 are designed in the above manner, the duct air conditioner 40 as a whole can have a higher air volume.

[0119] In some embodiments, the value of S1 / S2 is greater than the value of S3 / S2. In this case, the length of the first connecting piece 4311 is greater than the length of the third connecting piece 4313. Fig.11 As shown in Table 1, when the value of S1 / S2 is greater than the value of S3 / S2, the overall air volume of the duct air conditioner 40 is larger, vortex is not easily formed, and the air volume increase ratio is higher. Of course, in other embodiments, the value of S1 / S2 may also be less than the value of S3 / S2. In this case, as shown in Table 1, the duct air conditioner 40 can also have a higher air volume.

[0120] In some embodiments, the value of S1 / S2 is 0.96, and the value of S3 / S2 is 0.65. At this time, as shown in Table 1, the overall flow rate of the duct unit 40 can reach 785.6m 3 / h, the flow rate increase rate can reach 109.2%, which is a large increase and the effect is better.

[0121] At the same time, if Fig.16 As shown, Fig.16This is one of the wind speed simulation diagrams of the duct air conditioner 40 provided in the embodiment of the present application. Fig.16 The value of S1 / S2 in the air duct machine 40 shown is 0.96, and the value of S3 / S2 is 0.65. Fig.16 It can be seen that the overall wind speed of the duct machine 40 is relatively uniform.

[0122] Of course, in other embodiments, the values ​​of S1 / S2 and S3 / S2 may also be other values. For example, the value of S1 / S2 may also be 0.7, and correspondingly, the value of S3 / S2 may be 1.04. At this time, as shown in Table 1, the overall flow rate of the duct air conditioner 40 can reach 765.8m 3 / h, the flow rate increase rate can also reach 106.5%.

[0123] At the same time, if Fig.17 As shown, Fig.17 The second wind speed simulation diagram of the duct air conditioner 40 provided in the embodiment of the present application is as follows: Fig.17 The value of S1 / S2 in the air duct machine 40 shown is 0.7, and the value of S3 / S2 is 1.04. Fig.17 It can be seen that the overall wind speed of the duct machine 40 is also relatively uniform.

[0124] Therefore, if Fig.16 and Fig.17 It can be seen that the duct air conditioner provided in the embodiment of the present application can make the wind speed distribution more uniform, so that the wind resistance generated inside the duct air conditioner is smaller, thereby increasing the air volume of the entire duct air conditioner.

[0125] 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. A duct machine, characterized in that: include: The housing has a receiving cavity formed therein and is provided with an air inlet and an air outlet communicated with the receiving cavity; A fan is arranged in the accommodating cavity; as well as, A heat exchanger, the heat exchanger is arranged in the accommodating cavity and is located on a side of the fan close to the air outlet; Wherein, the heat exchanger comprises: The heat exchange fins have two ends bent toward a side close to the air outlet so that the heat exchange fins protrude toward a side of the fan.

2. The air duct machine according to claim 1, characterized in that: The heat exchange fins include: a first connecting piece, the first connecting piece being arranged in the accommodating cavity at an angle relative to the air outlet; along a first direction, the first connecting piece gradually moves away from the air outlet; a second connecting piece, located along the first direction and on one side of the first connecting piece, one end of the second connecting piece being connected to an end of the first connecting piece relatively far from the air outlet; the second connecting piece is arc-shaped and protrudes toward a side close to the fan; and a third connecting piece, located on a side of the second connecting piece away from the first connecting piece; the third connecting piece is arranged in the accommodating cavity at an angle relative to the air outlet, and along the first direction, the third connecting piece gradually approaches the air outlet; an end of the third connecting piece relatively away from the air outlet is connected to the other end of the second connecting piece; Wherein, the first direction is parallel to the plane where the air outlet is located.

3. The air duct machine according to claim 2, characterized in that: The second connecting piece is in an arc shape.

4. The air duct machine according to claim 3, characterized in that: Along a cross section perpendicular to the plane where the air outlet is located and parallel to the first direction, a line connecting the midpoint of the arc of the second connecting piece and the center of the circle corresponding to the arc of the second connecting piece is perpendicular to the plane where the air outlet is located.

5. The air duct machine according to claim 4, characterized in that: Along a cross section perpendicular to the plane where the air outlet is located and parallel to the first direction, there is a gap between the projection point of the center of the arc of the second connecting piece on the plane where the air outlet is located and the midpoint of the air outlet along the first direction.

6. The air duct machine according to claim 5, characterized in that: Along a cross section perpendicular to the plane where the air outlet is located and parallel to the first direction, the absolute value of the difference between the projection point of the center of the arc corresponding to the second connecting piece on the plane where the air outlet is located and the midpoint of the air outlet along the first direction is less than or equal to one quarter of the size of the air outlet along the first direction.

7. The air duct machine according to claim 5, characterized in that: The air duct machine also includes: A middle partition is arranged in the accommodating cavity, between the fan and the heat exchange fins, and arranged opposite to the air outlet; a fan flow opening is opened on the middle partition; the fan exhaust port is arranged opposite to the fan flow opening; Among them, along the cross section perpendicular to the plane where the air outlet is located and parallel to the first direction; the cross-sectional area between the first connecting piece and the middle partition is S1; the cross-sectional area between the second connecting piece and the middle partition is S2; the cross-sectional area between the third connecting piece and the middle partition is S3; S1 / S2 is (0.7+0.02n), S3 / S2 is (1.04-0.03n); n is zero or a positive integer, and S1 / S2 is less than or equal to 0.96, and S3 / S2 is greater than or equal to 0.

65.

8. The air duct machine according to claim 7, characterized in that: The value of S1 / S2 is greater than the value of S3 / S2.

9. The air duct machine according to claim 7, characterized in that: The value of S1 / S2 is 0.96; the value of S3 / S2 is 0.

65.

10. The air duct machine according to claim 3, characterized in that: The included angles between the first connecting piece and the third connecting piece and the plane where the air outlet is located are 45° to 60°.

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