A type of duct machine

Abstract

This application discloses a ducted air conditioner, relating to the field of air conditioning technology, to solve the problem of insufficient air volume in existing ducted air conditioners. The ducted air conditioner includes a housing, a fan, and a heat exchanger. The housing has an internal cavity with an air inlet and an air outlet communicating with it. The fan is disposed within the cavity. The heat exchanger is disposed within the cavity, located on the side of the fan near the air outlet. The heat exchanger includes heat exchange fins. Both ends of the heat exchange fins are bent towards the air outlet, causing the fins to bulge towards the fan. This ducted air conditioner is used to regulate indoor temperature.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and more particularly to a ducted air conditioner. Background Technology

[0002] The indoor unit of a ducted air conditioner is a duct unit. Because ducted air conditioners have advantages such as concealed installation and easy integration with home decoration ceilings, they have a good aesthetic appearance when installed indoors.

[0003] When the air conditioner is running, the impeller of the fan assembly rotates inside the duct unit, causing air near the casing to enter the casing. As the air flows through the heat exchanger, it exchanges heat with the heat exchanger, and the air after heat exchange can flow out of the casing, thus regulating the temperature and / or humidity near the installation area.

[0004] However, the current ducted air conditioners have a relatively small air volume, which cannot meet the needs of users. Summary of the Invention

[0005] This application provides a ducted air conditioner to solve the problem of insufficient air volume in existing ducted air conditioners.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides a ducted air conditioner, including a housing, a fan, and a heat exchanger. The housing has an internal cavity with an air inlet and an air outlet communicating with it. The fan is disposed within the cavity. The heat exchanger is also disposed within the cavity, located on the side of the fan closer to the air outlet. The heat exchanger includes heat exchange fins. Both ends of the heat exchange fins are bent towards the direction closer to the air outlet, causing the fins to bulge towards the fan side.

[0008] The ducted air conditioner provided in this embodiment features a heat exchanger located on the side of the fan near the air outlet. External air enters the installation cavity from the air inlet under the fan's drive, exchanges heat with the heat exchanger, and is then blown out from the air outlet. The air blown out after heat exchange can regulate the indoor temperature. Because the heat exchange fins bulge towards the fan, the airflow inside the casing is less likely to form vortices at the heat exchange fins, allowing the airflow to be blown out more effectively from the air outlet, thus increasing the airflow volume of the ducted air conditioner. Simultaneously, the air velocity distribution inside the ducted air conditioner is relatively uniform, resulting in lower internal air resistance and further increasing the overall airflow of the unit.

[0009] In some embodiments, the heat exchange fins include a first connecting piece, a second connecting piece, and a third connecting piece. The first connecting piece is inclined within the receiving cavity relative to the air outlet. Along a 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, with one end connected to the end of the first connecting piece that is relatively away from the air outlet. The second connecting piece is arc-shaped and protrudes towards the direction closer to the fan. The third connecting piece is located on the side of the second connecting piece that is away from the first connecting piece and is inclined within the receiving cavity relative to the air outlet. Along the first direction, the third connecting piece gradually moves closer to the air outlet, with the end relatively away from the air outlet connected to the other end of the second connecting piece. The first direction is parallel to the plane containing the air outlet.

[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, the line connecting the midpoint of the arc of the second connecting piece and the center of the corresponding circle of 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, the projection point of the center of the arc corresponding to the second connecting piece on the plane where the air outlet is located is spaced apart from 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 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 dimension of the air outlet along the first direction.

[0014] In some embodiments, the ducted air conditioner further includes a partition plate. The partition plate is disposed within the receiving cavity, located between the fan and the heat exchange fins, and opposite to the air outlet. A fan flow port is provided on the partition plate. The fan exhaust port is opposite to the fan flow port. Specifically, along a cross-section perpendicular to the plane of the air outlet and in the first direction, the cross-sectional area between the first connecting piece and the partition plate is S1, the cross-sectional area between the second connecting piece and the partition plate is S2, and the cross-sectional area between the third connecting piece and the partition plate is S3. S1 / S2 is (0.7 + 0.02n), and 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 angle between the first connecting piece and the third connecting piece and the plane where the air outlet is located is 45° to 60°. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the connection structure of a duct-type air conditioner provided in an embodiment of this application;

[0019] Figure 2 for Figure 1 The diagram shows a structure in which a gas-liquid separator and an oil separator are installed between the compressor and the four-way valve.

[0020] Figure 3 for Figure 1 The diagram shows a connection structure where no four-way valve is provided between the compressor and the outdoor heat exchanger and the indoor heat exchanger.

[0021] Figure 4 A side view of the indoor unit of the first type of ducted air conditioner provided for the purposes of this application;

[0022] Figure 5 This is a structural diagram of a ductwork machine based on related technologies;

[0023] Figure 6 for Figure 5 The diagram shows the airflow direction inside the ducted air handling unit.

[0024] Figure 7 This is a schematic diagram of the structure of a ductwork machine provided in an embodiment of this application;

[0025] Figure 8 for Figure 7 The diagram shows the airflow direction of the ducted air conditioner;

[0026] Figure 9 This is a schematic diagram of another duct unit provided in an embodiment of this application;

[0027] Figure 10 This is a schematic diagram of the structure of another duct air conditioner provided in the embodiments of this application;

[0028] Figure 11 for Figure 10 The diagram shows the airflow direction of the ducted air conditioner.

[0029] Figure 12 for Figure 7 One of the simulation diagrams of the airflow direction of the ducted air conditioner along a section perpendicular to the first direction;

[0030] Figure 13 for Figure 7 The second simulation diagram shows the airflow direction of the ducted air conditioner along a section perpendicular to the first direction.

[0031] Figure 14 for Figure 10 One of the simulation diagrams of the airflow direction of the ducted air conditioner along a section perpendicular to the first direction;

[0032] Figure 15 for Figure 10 The second simulation diagram shows the airflow direction of the ducted air conditioner along a section perpendicular to the first direction.

[0033] Figure 16 This is one of the wind speed simulation diagrams of the ducted air conditioner provided in the embodiments of this application;

[0034] Figure 17 The second simulation diagram of the wind speed of the ducted air conditioner provided in the embodiments of this application.

[0035] Figure label:

[0036] 010-Ductless air conditioner; 011-Shell; 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 - Ductless air conditioner; 41 - Shell; 411 - Receiving cavity; 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 plate; 4312 - Second connecting plate; 4313 - Third connecting plate; 44 - Middle partition plate. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "center", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

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

[0042] In the description of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more.

[0043] In this application, unless otherwise expressly specified and limited, the term "connection" shall be interpreted broadly. For example, "connection" may be a fixed connection, a detachable connection, or an integral part; it may be a direct connection or an indirect connection through an intermediate medium.

[0044] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0045] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0046] An air conditioner, also known as an air conditioner, is a device that can regulate and control the temperature, humidity, and circulating air of the indoor environment of a building or structure.

[0047] like Figure 1As shown, this application provides a ducted 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. For example, 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 gas end and a discharge gas end, such as... Figure 1 The end of the air flowing into the compressor 11 along the direction of the arrow is the return end of the compressor, and the other end is the outlet end of the compressor 11.

[0048] The return end of compressor 11 can be connected to the first port A of the four-way valve, the outlet end of 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 outdoor heat exchanger 13, the other end of outdoor heat exchanger 13 can be connected to one end of indoor heat exchanger 15 through pressure reducer 14, and the other end of 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 two parts: 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 correspondingly, the 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, for example, a capillary tube or an electronic expansion valve throttling device. Figure 1 The pressure reducer 14 can be installed in the indoor unit 30 as shown, or it can be installed in the refrigerant pipeline between the outdoor unit 20 and the indoor unit 30. As long as the pressure reducer 14 is located between the indoor heat exchanger 15 and the outdoor heat exchanger 13 along the refrigerant flow direction.

[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 generate a reversible phase change. At the same time as the refrigerant generates a phase change, it can release or absorb heat through the heat exchanger.

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

[0052] The air conditioner 100 can be configured as a single outdoor unit 20 driving one indoor unit 30 for refrigerant circulation, such as a one-to-one structure. Alternatively, the air conditioner 100 can be configured as a high-power outdoor unit 20 driving multiple indoor units 30 for refrigerant circulation, such as a residential one-to-many central air conditioning system. Or, the air conditioner 100 can be configured as multiple outdoor units 20 connected in parallel to drive the indoor units 30 for refrigerant circulation, such as a large air conditioning unit.

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

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

[0055] Thus, 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 at the outdoor heat exchanger 13 and release heat 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 flowing into the indoor heat exchanger 15 is reduced, allowing the liquid refrigerant to absorb heat and vaporize at the indoor heat exchanger 15. This facilitates heat exchange and transfer between the outdoor heat exchanger 13 and the indoor heat exchanger 15, cooling the air near the indoor heat exchanger 15. The vaporized refrigerant flowing out of the indoor heat exchanger 15 can sequentially flow through the fourth port D and the first port A of the four-way valve 12. Then, the gaseous refrigerant can be drawn into the compressor 11 through the return gas end and compressed, thus achieving refrigerant circulation.

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

[0058] Thus, the high-temperature, high-pressure gaseous refrigerant compressed by 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... Figure 2 The indoor heat exchanger 15 shown is designed so that the high-temperature and high-pressure gaseous refrigerant can be liquefied and release heat at the indoor heat exchanger 15 to heat the air near the indoor heat exchanger 15.

[0059] Subsequently, under the action of pressure reducer 14, the water flows through pressure reducer 14 and into the air. Figure 2 The pressure of the liquid refrigerant at the outdoor heat exchanger 13 is reduced, allowing the liquid refrigerant to absorb heat and vaporize at the outdoor heat exchanger 13. This facilitates heat exchange and transfer between the outdoor heat exchanger 13 and the indoor heat exchanger 15, cooling the air surrounding the outdoor heat exchanger 13. The vaporized refrigerant flows sequentially through the third port C and the first port A of the four-way valve 12. Then, the gaseous refrigerant can be drawn into the compressor 11 through the return gas end and compressed, thus achieving refrigerant circulation.

[0060] To prevent the gaseous refrigerant drawn into compressor 11 from being mixed with liquid refrigerant or impurities, such as... Figure 3 As shown, the air conditioner 100 may further include a gas-liquid separator 16. The gas-liquid separator 16 can be installed between the first port A of the four-way valve 12 and the return gas end of the compressor 11, so that the first port A can be connected and energized to the return gas end of the compressor 11 through the gas-liquid separator 16. In this way, when gaseous refrigerant mixed with impurities such as liquid refrigerant or lubricating oil flows to the return gas end of the compressor 11 through the gas-liquid separator 16, the gas-liquid separator 16 can 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 also include an oil separator 17, and the outlet end of the compressor 11 and the second port B of the four-way valve 12 can also be connected and circulated through the oil separator 17. In this way, the lubricating oil mixed in the high-temperature and high-pressure gaseous refrigerant can be separated during the flow of 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 along with the refrigerant, so that the indoor heat exchanger 15 and the outdoor heat exchanger 13 have higher heat exchange efficiency.

[0062] In some other embodiments, a four-way valve may not be necessary.

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

[0064] It should be noted that the indoor unit 30 of the air conditioner 100 can be a ducted unit. Ducted indoor units 30 are typically installed in conjunction with a suspended ceiling structure, allowing for concealed installation. This method offers advantages such as concealed installation, ease of integration with home ceiling designs, and good aesthetics.

[0065] In related technologies, such as Figure 5 As shown, Figure 5 This is a schematic diagram of the structure of a ducted air conditioner 010 according to related technology. The ducted air conditioner 010 includes a housing 011 and a heat exchanger 012 disposed within the housing 011. The heat exchanger 012 is located on the side near the air outlet 014. Meanwhile, as... Figure 5 As shown, the heat exchanger 012 has heat dissipation fins 013 that protrude toward the direction of the air outlet 014.

[0066] However, the aforementioned heat exchanger 012 results in a narrow flow space at the air outlet 014 of the ducted air conditioner 010, leading to higher duct resistance and flow velocity. This makes it prone to interaction with the air outlet grille, resulting in excessively loud exhaust noise. Additionally, if... Figure 6 As shown, Figure 6 for Figure 5 The diagram shows the airflow direction inside the ducted air conditioner 010. The heat exchanger 012 forms a large vortex on the lower side of the windward side, which affects the air output of the ducted air conditioner 010, resulting in a relatively small overall air output of the ducted air conditioner 010.

[0067] Based on this, embodiments of this application provide a duct air handling unit, such as... Figure 7 As shown, Figure 7 This is a schematic diagram of the structure of a duct air conditioner 40 provided in an embodiment of this application. The duct air conditioner 40 includes a housing 41, a fan 42, and a heat exchanger 43.

[0068] like Figure 7 As shown, the interior of the housing 41 forms a receiving cavity 411, and has an air inlet 412 and an air outlet 413 communicating with the receiving cavity 411. Thus, external air can enter the interior of the receiving cavity 411 through the air inlet 412 and flow out of the outside of the receiving cavity 411 through the air outlet 413.

[0069] It is understood that the housing 41 can be designed in different shapes. For example, such as... Figure 7 As shown, the external shape of the shell 41 can be set to a cuboid shape. Figure 7 The vertical direction shown can be the height direction of the shell 41. Figure 7 The left and right directions shown can be the width direction of the housing 41.

[0070] based on Figure 7The housing 41 shown has an air inlet 412 and an air outlet 413 that can be disposed along the width direction of the housing 41 (i.e., Figure 7 The air inlet 412 and air outlet 413 are arranged opposite each other on the left and right sides of the housing 41 (as shown in the left and right directions). Furthermore, for better air intake and exhaust, the air inlet 412 and air outlet 413 can be elongated, extending along the length of the housing 41 (i.e., perpendicular to the horizontal direction). Figure 7 (The direction of the cross section shown) extends.

[0071] Continue to refer to Figure 7 The fan 42 and the heat exchanger 43 can be disposed within the receiving cavity 411, with the heat exchanger 43 located on the side of the fan 42 near the air outlet 413. The fan 42 is used to allow outside air to enter the receiving cavity 411 through the air inlet 412 and be blown out from the air outlet 413.

[0072] Therefore, external air can enter the installation cavity through the air inlet 412 driven by the fan 42, exchange heat with the heat exchanger 43, and then be blown out through the air outlet 413. The air blown out after heat exchange with the heat exchanger 43 can regulate the indoor temperature.

[0073] For example, such as Figure 7 As shown, the air inlet 412 and air outlet 413 of the housing 41 are disposed on the two side walls of the housing 41 that are opposite to each other along the width direction. Correspondingly, the fan 42 and the heat exchanger 43 can be disposed at intervals inside the receiving cavity 411 along the width direction of the housing 41, and the heat exchanger 43 is located on the side of the fan 42 closer to the air outlet 413.

[0074] Understandably, the type of fan 42 can be selected according to the actual situation. For example, the fan 42 can be a centrifugal fan. The exhaust port 4211 of the fan 42 can face the heat exchanger 43. Thus, the fan 42 can more effectively blow outside air towards the heat exchanger 43 and blow it out from the exhaust port 413.

[0075] In addition, centrifugal fans are characterized by small size, low noise and high air pressure, which is beneficial for increasing airflow in duct units 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, with the centrifugal impeller 422 installed inside the volute 421. The volute 421 has an exhaust port 4211 and an air inlet (not shown in the figure).

[0077] like Figure 7 As shown, the exhaust vent 4211 can be located on the volute 421 near the volute tongue 423, and the exhaust vent 4211 can be oriented towards the heat exchanger 43. The exhaust vent 4211 is... Figure 7 The height direction of the shell 41 shown (i.e. Figure 7 As shown above, the upper part (upper and lower) can be positioned close to the upper side of the receiving cavity 411, i.e., as... Figure 7 As shown, the exhaust vent 4211 is located on the upper left side of the volute 421.

[0078] The axial direction of the centrifugal impeller 422 can be parallel to... Figure 7 The length direction of the shell 41 shown (i.e., perpendicular to) Figure 7 (The direction of the cross-section shown). In this way, the centrifugal impeller 422 can rotate about 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 provided on the side wall of one side of the volute 421.

[0079] It is understood that a volute 421 and a corresponding centrifugal impeller 422 can be installed within the receiving cavity 411. Multiple volutes 421 and corresponding centrifugal impellers 422 can also be installed. For example, see... Figure 7 , along perpendicular to Figure 7 The direction of the cross section shown allows for the arrangement of multiple spaced volutes 421, and the number of centrifugal impellers 422 can be set in a one-to-one correspondence with the number of volutes 421, that is, one centrifugal impeller 422 can be installed in one volute 421.

[0080] For example, the number of centrifugal impellers 422 and volutes 421 can be two, three, four, or more, depending on the orientation of the volutes 421 perpendicular to the x-axis. Figure 7 The dimensions of the cross-section shown are perpendicular to those of the heat exchanger 43 in the direction of the cross-section. Figure 7 The number of volutes 421 can be flexibly set in the direction of the cross-section shown. Thus, multiple volutes 421 perpendicular to the cross-section can be used. Figure 7 Centrifugal fans spaced apart along the direction of the cross-section shown blow air toward the heat exchanger 43, which helps to improve the performance of the heat exchanger 43 perpendicular to the cross-section. Figure 7 The uniformity of wind exposure along 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 can be multiple heat exchange fins 431, which can be spaced apart along a direction parallel to the air outlet 413. Heat exchange tubes can be threaded onto the multiple heat exchange fins 431.

[0082] For example, refer to Figure 7 Multiple heat exchange fins 431 can be along Figure 7 The length direction of the shell 41 shown (i.e., perpendicular to) Figure 7 The heat exchange tubes are spaced apart (in the direction of the cross-section shown). Correspondingly, the heat exchange tubes extend along the length of the shell 41, pass through multiple heat exchange fins 431 in sequence, and are installed on multiple heat exchange fins 431.

[0083] Continue to refer to Figure 7 The two ends of the heat exchange fins 431 can be bent towards the direction close to the air outlet 413, causing the heat exchange fins 431 to bulge towards the side of the fan 42. At this time, as... Figure 8 As shown, Figure 8 for Figure 7 The airflow diagram of the duct air conditioner 40 shown shows that, since the heat exchange fins 431 protrude towards the fan 42, the airflow inside the casing 41 is less likely to form vortices at the heat exchange fins 431 of the heat exchanger 43, and the airflow can be blown out more effectively from the air outlet 413, thereby making the airflow of the duct air conditioner 40 larger.

[0084] like Figure 7 As shown, in some embodiments, the heat exchange fins 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 inclined relative to the air outlet 413 and disposed within the receiving cavity 411, and along a first direction, the first connecting piece 4311 gradually moves away from the air outlet 413. The first direction is parallel to the plane containing the air outlet 413.

[0085] For example, such as Figure 7 As shown, the first connecting piece 4311 is along the height direction of the housing 41 (i.e., Figure 7 Extending in the vertical direction (as shown). Correspondingly, the first direction can be... Figure 7 The direction shown is from top to bottom. The first connecting piece 4311 is tilted to 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 the end of the first connecting piece 4311 that is relatively away from the air outlet 413. The second connecting piece 4312 is arc-shaped and protrudes towards the direction close to the fan 42. For example, as shown... 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 the side of the second connecting piece 4312 away from the first connecting piece 4311, and is inclined within the receiving cavity 411 relative to the air outlet 413. Along the first direction, the third connecting piece 4313 gradually approaches the air outlet 413, and the end relatively away from the air outlet 413 connects to the other end of the second connecting piece 4312. For example, as... Figure 7 As shown, the third connecting piece 4313 is tilted to the upper right.

[0088] like Figure 7As shown, since the first connecting piece 4311 and the second connecting piece 4312 are inclined within the receiving cavity 411 relative to the air outlet 413, when the size of the receiving cavity 411 along the first direction is small, the sizes of the first connecting piece 4311 and the second connecting piece 4312 can be larger, thereby making the size of the heat exchange fins 431 larger and improving the heat exchange efficiency of the heat exchanger 43. Because the second connecting piece 4312 is arc-shaped and protrudes towards the air outlet 413, the heat exchange fins 431 can be made to protrude as a whole towards the direction closer to the fan 42.

[0089] Of course, in other embodiments, such as Figure 9 As shown, Figure 9 This is a schematic diagram of another duct air conditioner 40 provided in an embodiment of this application. The heat exchange fins 431 may also include only the first connecting piece 4311 and the third connecting piece 4313. In this case, the structure of the heat exchange fins 431 is simple and easier to manufacture.

[0090] In some embodiments, the second connecting piece 4312 can be arc-shaped. When the second connecting piece 4312 is arc-shaped, its shape is smoother. Of course, the second connecting piece 4312 can also be a non-arc-shaped 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, the line connecting the midpoint of the arc of the second connecting piece 4312 and the center of the corresponding circle of the arc of the second connecting piece 4312 is perpendicular to the plane where the air outlet 413 is located.

[0092] For example, such as 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. Among them, 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 connecting the midpoint A of the arc of the second connecting piece 4312 and the center O of the corresponding arc of the second connecting piece 4312 is perpendicular to the plane where the air outlet 413 is located. Therefore, the first connecting piece 4311, the second connecting piece 4312, and the third connecting piece 4313 will not overlap in the direction perpendicular to the plane where the air outlet 413 is located. At this time, the air blown by the fan 42 from the side of the heat exchange fins 431 away from the air outlet 413 can directly dissipate heat from the first connecting piece 4311, the second connecting piece 4312, or the third connecting piece 4313 at different locations, ensuring the heat exchange efficiency of the heat exchange fins 431.

[0094] Of course, in other embodiments, the line connecting the midpoint A of the arc of the second connecting piece 4312 and the center O of 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 containing the air outlet 413 can be 45° to 60°. Based on this scheme, the heat exchange fins 431 can have a relatively small height along the first direction, and the lengths of the first connecting piece 4311 and the third connecting piece 4313 can also be set to be relatively long, which facilitates heat exchange.

[0096] like Figure 7 As shown, the ends of the first connecting piece 4311 and the third connecting piece 4313 near the air outlet 413 can respectively abut against the inner wall of the housing 41. The shortest distance between the ends of the first connecting piece 4311 and the third connecting piece 4313 near the air outlet 413 and the midpoint B of the air outlet 413 along the first direction can be equal, that is, as shown... 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. The length relationship between the first connecting piece 4311 and the third connecting piece 4313 in the housing 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 projection point of the center of the arc corresponding to the second connecting piece 4312 onto the plane where the air outlet 413 is located is above the midpoint of the air outlet 413 along the first direction, as follows: Figure 10 As shown, Figure 10 This is a schematic diagram of another duct unit 40 provided in an embodiment of this application, in which the length of the third connecting piece 4313 is greater than the length of the first connecting piece 4311. In this case, as... Figure 11 As shown, Figure 11 for Figure 10 The diagram shows the airflow direction of the ducted air conditioner. Vortexes are not easily formed at the heat exchanger 43, and the air inside the casing 41 can be blown out better, ensuring the air volume of the ducted air conditioner 40.

[0100] When the projection point of the center of the arc corresponding to the second connecting piece 4312 onto the plane where the air outlet 413 is located is below the midpoint of the air outlet 413 along the first direction, as follows: Figure 7 As shown, the length of the first connecting piece 4311 is less than the length of the third connecting piece 4313.

[0101] In addition, such as Figure 8 and Figure 10 As shown, the embodiment of this application provides a path parallel to... Figure 8 and Figure 10 The cross-sectional arrangement shown has multiple heat exchange fins 431 arranged vertically. Figure 8 and Figure 10 The cross-sectional spacing is shown. When the airflow blown by the fan 42 blows from the left to the right heat exchange fins 431, the airflow that directly hits the heat exchange fins 431 will deflect towards the gap between the two adjacent heat exchange fins 431, forming an airflow angle, which can reduce the probability of fin noise.

[0102] like Figure 12 and Figure 13 As shown, Figure 12 for Figure 7 One of the simulation diagrams shown is of the airflow direction of the ducted air conditioner 40 along a section perpendicular to the first direction. Figure 13 for Figure 7 The second simulation diagram shows the airflow direction of the ducted air conditioner 40 along a section perpendicular to the first direction, where, as shown... Figure 13 As shown, the air blown by the fan 42 towards the heat exchanger has a region with a low wind speed. In this region with a low wind speed, it is not easy to generate fin noise, thus making the probability of fin noise generated by the heat exchanger 43 low.

[0103] Similarly, such as Figure 14 and Figure 15 As shown, Figure 14 for Figure 10 One of the simulation diagrams shown is of the airflow direction of the ducted air conditioner 40 along a section perpendicular to the first direction. Figure 15 for Figure 10 The second simulation diagram shows the airflow direction of the ducted air conditioner 40 along a section perpendicular to the first direction, where, as shown... Figure 15 As shown, the air blown by fan 42 towards the heat exchanger has a region with a low air velocity within the heat exchanger (i.e., Figure 15 (At the dashed box in the middle) fin noise is not easily generated in this area with low wind speed, thus making the probability of fin noise generated by heat exchanger 43 low.

[0104] Therefore, it can be seen 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 machine 40 producing fin noise 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, 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 is spaced from the midpoint of the air outlet 413 along the first direction.

[0106] based on Figure 7 and Figure 10 The scheme shown allows for an increase in the overall airflow of the duct unit 40 when the projection point of the center of the arc corresponding to the second connecting piece 4312 onto the plane where the air outlet 413 is located is spaced from the midpoint of the air outlet 413 along the first direction. The following is an illustrative explanation of the above effect.

[0107] In some embodiments, such as Figure 10 As shown, the ducted air conditioner 40 also includes a partition plate 44. The partition plate 44 is disposed within the receiving cavity 411, located between the fan 42 and the heat exchange fins 431, and is opposite to the air outlet 413. A fan flow port (not shown) is provided on the partition plate 44. The exhaust port 4211 of the fan 42 is opposite to the fan flow port. For example, the plane containing the partition plate 44 and the air outlet 413 is parallel within the receiving cavity 411.

[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 S1, S2, S3 and the air volume of the ducted air conditioner 40 is shown in Table 1:

[0110] Table 1

[0111]

[0112]

[0113] As can be seen from Table 1, when the heat exchange fins 431 protrude towards the direction closer to the fan 42, the overall air volume (flow rate) of the ducted air conditioner 40 is increased. Therefore, the ducted air conditioner 40 provided in this embodiment of the application can increase the overall air volume of the ducted air conditioner 40.

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

[0115] Therefore, as shown in Table 1, when 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, which is perpendicular to the plane where the air outlet 413 is located and parallel to the first direction, is spaced from the midpoint of the air outlet 413 along the first direction, the overall air volume of the duct unit 40 is increased.

[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 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 dimension 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 onto 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-mentioned 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 fins 431. When the absolute value of the above-mentioned difference is too large, the dimensional difference between the first connecting piece 4311 and the third connecting piece 4313 is large, which can easily lead to the formation of a narrow angle between the shell 41 and the heat exchanger 43, causing manufacturing problems.

[0118] In some embodiments, S1 / S2 is (0.7 + 0.02n), and S3 / S2 is (1.04 - 0.03n); where 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 unit 40 as a whole can have a high 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. Refer to Table 1 and... Figure 11 As shown, when the value of S1 / S2 is greater than the value of S3 / S2, the overall air volume of the ducted air conditioner 40 is larger, and it is less likely to form vortices, resulting in a higher air volume increase rate. Of course, in some other embodiments, the value of S1 / S2 can also be less than the value of S3 / S2. In this case, as shown in Table 1, the ducted air conditioner 40 can also have a high air volume.

[0120] In some embodiments, the value of S1 / S2 is 0.96, and the value of S3 / S2 is 0.65. In this case, as shown in Table 1, the overall flow rate of the duct unit 40 can reach 785.6 m³ / s. 3 / h, the traffic increase rate can reach 109.2%, which is a significant improvement and a good effect.

[0121] At the same time, such as Figure 16 As shown, Figure 16This is one of the wind speed simulation diagrams of the duct air conditioner 40 provided in the embodiments of this application. Figure 16 The S1 / S2 value in the ducted air conditioner 40 shown is 0.96, and the S3 / S2 value is 0.65. (This is from...) Figure 16 It can be seen that the overall airflow speed of the ducted air conditioner 40 is relatively uniform.

[0122] Of course, in other embodiments, the values ​​of S1 / S2 and S3 / S2 can also be other values. For example, the value of S1 / S2 can also be 0.7, and correspondingly, the value of S3 / S2 can be 1.04. In this case, as shown in Table 1, the overall flow rate of the duct unit 40 can reach 765.8 m³ / s. 3 / h, the traffic increase rate can also reach 106.5%.

[0123] At the same time, such as Figure 17 As shown, Figure 17 This is the second simulation diagram of the air velocity of the duct air conditioner 40 provided in the embodiments of this application. Figure 17 The S1 / S2 value in the ducted air conditioner 40 shown is 0.7, and the S3 / S2 value is 1.04. (From...) Figure 17 It can be seen that the overall airflow speed of the ducted air conditioner 40 is relatively uniform.

[0124] Therefore, as Figure 16 and Figure 17 As can be seen, the duct air conditioner provided in this application embodiment can make the air velocity distribution more uniform, thereby reducing the air resistance generated inside the duct air conditioner and increasing the air volume of the entire duct air conditioner.

[0125] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A ducted fan machine characterized by, The application relates to a heat exchanger. The heat exchanger comprises: a housing, an accommodating cavity is formed in the housing, and an air inlet and an air outlet are arranged in the housing and communicate with the accommodating cavity; a fan arranged in the accommodating cavity; and a heat exchanger arranged in the accommodating cavity and located on the side of the fan close to the air outlet. The heat exchanger comprises: a heat exchange fin, two ends of the heat exchange fin are bent towards the side close to the air outlet, and the heat exchange fin is convex towards the side of the fan. a first connecting plate, the first connecting plate is arranged in the accommodating cavity and is inclined relative to the air outlet; and the first connecting plate gradually moves away from the air outlet along a first direction. a second connecting plate, the second connecting plate is located on the side of the first connecting plate along the first direction, one end of the second connecting plate is connected with the end of the first connecting plate away from the air outlet; the second connecting plate is in the shape of an arc and is convex towards the side of the fan; and the center of the arc corresponding to the second connecting plate is located between the projection point of the center of the arc on the plane of the air outlet and the midpoint of the air outlet along the first direction. a third connecting plate, the third connecting plate is located on the side of the second connecting plate away from the first connecting plate; the third connecting plate is arranged in the accommodating cavity and is inclined relative to the air outlet; and the third connecting plate gradually moves towards the air outlet along the first direction. The first direction is parallel to the plane of the air outlet. a partition plate arranged in the accommodating cavity, located between the fan and the heat exchange fin, and arranged opposite to the air outlet; the partition plate is provided with a fan flow passage; the air outlet of the fan is arranged opposite to the fan flow passage; and the cross-sectional area between the first connecting plate and the partition plate is S1, the cross-sectional area between the second connecting plate and the partition plate is S2, and the cross-sectional area between the third connecting plate and the partition plate is S3.

2. The ducted fan machine of claim 1, wherein, S1 / S2 is (0.7+0.02n), and S3 / S2 is (1.04-0.03n); n is zero or a positive integer, S1 / S2 is less than or equal to 0.96, and S3 / S2 is greater than or equal to 0.

65.

3. The ducted fan machine of claim 1, wherein, The line connecting the midpoint of the arc of the second connecting plate and the center of the arc corresponding to the second connecting plate is perpendicular to the plane of the air outlet.

4. The ducted fan machine of claim 1, wherein, The absolute value of the difference between the projection point of the center of the arc corresponding to the second connecting plate on the plane of the air outlet and the midpoint of the air outlet along the first direction is less than or equal to one fourth of the size of the air outlet along the first direction. The value of S1 / S2 is greater than the value of S3 / S2.

5. The ducted fan machine of claim 1, wherein, The value of S1 / S2 is 0.96; the value of S3 / S2 is 0.

65.

6. The ducted fan machine according to claim 1, wherein, The included angle between the first connecting piece, the third connecting piece and the plane where the air outlet is located is 45°-60°.

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