Duct type air conditioner

Abstract

The utility model discloses a duct type air conditioner which comprises a machine shell, an air inlet, an air outlet, a fan, a fan cover, a fan blade and a fan blade. The machine shell is provided with an air inlet and an air outlet. A heat exchanger; an air duct member; a cross-flow fan; the air duct piece comprises a volute arranged on the upper side of the containing cavity. The front volute tongue is arranged on the lower side of the containing cavity, part of the front volute tongue extends in the circumferential direction of the cross-flow fan, the front volute tongue and the cross-flow fan are arranged in a spaced mode, and an air outlet channel is formed between the front volute tongue and the volute; the outer radius of the cross-flow fan is R; the minimum width of one side, close to the air outlet, of the air outlet duct is L1; in the front-back direction, the front volute tongue is located between the central axis of the cross-flow fan and the air outlet, and in the front-back direction, the distance between the side, facing the air inlet, of the front volute tongue and the central axis of the cross-flow fan is D1; r, L1 and D1 meet the following conditions: 0.9 < = L1 / R < = 1.1, and 0.6 < = D1 / R < = 0.7. According to the air pipe machine, the large air inlet amount and the high wind resistance performance can be both considered, the air supply amount of the air pipe machine can be large, the air supply effect is good, and the user experience is better.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a ducted air conditioner. Background Technology

[0002] In related technologies, ducted air conditioners typically include a heat exchanger, ductwork components, and a cross-flow fan. When the cross-flow fan is running, it can drive air from the air inlet into the casing and after exchanging heat with the heat exchanger, it flows into the room from the air outlet.

[0003] Furthermore, the ducted air conditioner has a housing cavity inside its casing. The air duct components include a volute and a front volute tongue. The volute is located on the upper side of the housing cavity and the front volute tongue is located on the lower side of the housing cavity. An air outlet duct is formed between the volute and the volute tongue. The air outlet duct is connected to the air outlet. Air inside the housing can flow through the air outlet duct to the air outlet and then flow from the air outlet into the room.

[0004] However, due to the unreasonable structural design of the duct components in the relevant technologies, the duct air conditioner cannot effectively balance the air intake volume and wind resistance performance, which will affect the air delivery volume and air delivery distance of the duct air conditioner, resulting in poor air delivery effect and poor user experience. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide a ducted air conditioner that can balance a large air intake volume with strong wind resistance, thereby enabling the ducted air conditioner to deliver a large air volume and good air delivery effect, resulting in a better user experience.

[0006] To achieve the above objectives, this utility model proposes a ducted air conditioner, comprising: a housing, wherein the housing has an air inlet and an air outlet, and an internal cavity is formed within the housing; a heat exchanger, wherein the heat exchanger is disposed within the housing and adjacent to the air inlet; an air duct component, wherein the air duct component is disposed within the housing and located on the side of the heat exchanger facing the air outlet, the air duct component having an air outlet duct connected to the air outlet; and a cross-flow fan, wherein the cross-flow fan is disposed within the housing and at least partially located within the air duct component, the cross-flow fan driving air to enter the housing from the air inlet, and the air flowing into the room from the air outlet after exchanging heat with the heat exchanger; the air duct component includes: a volute, wherein the volute is disposed within the internal cavity. The upper side of the cavity; the front volute tongue, which is located on the lower side of the accommodating cavity, a portion of which extends circumferentially along the cross-flow fan and is spaced apart from the cross-flow fan, and the air outlet duct is formed between the front volute tongue and the volute shell; wherein, the outer radius of the cross-flow fan is defined as R; the minimum width of the air outlet duct adjacent to the air outlet is L1; in the front-rear direction of the duct machine, the front volute tongue is located between the central axis of the cross-flow fan and the air outlet, and in the front-rear direction of the duct machine, the distance between the side of the front volute tongue facing the air inlet and the central axis of the cross-flow fan is D1; ​​R, L1 and D1 satisfy: 0.9≤L1 / R≤1.1, and 0.6≤D1 / R≤0.7.

[0007] The above technical solution has the following advantages or beneficial effects: It is understood that when R is constant, the smaller the value of D1 / R, the smaller D1 is, and the larger the extension dimension of the front volute in the front-rear direction will be; conversely, the larger the value of D1 / R, the larger D1 is, and the smaller the extension dimension of the front volute in the front-rear direction will be. Therefore, by ensuring 0.6 ≤ D1 / R, the value of D1 can be relatively large, thus allowing the extension dimension of the front volute in the front-rear direction to be relatively small. The front volute will not excessively affect the air intake space of the cross-flow fan, thereby ensuring a larger air intake volume for the cross-flow fan. Furthermore, if D1 / R ≤ 0.7, the value of D1 can be relatively small, thus allowing the extension dimension of the front volute in the front-rear direction to be relatively large, resulting in a longer flow channel between the front volute and the cross-flow fan, thereby reducing noise when air flows through this channel.

[0008] Furthermore, when the value of R is constant, the smaller the value of L1 / R, the smaller L1 will be. By making 0.95≤L1 / R, the minimum width L1 on the side of the air outlet duct adjacent to the air outlet can be larger, thereby reducing the air outlet resistance of the air outlet duct and the resistance of air flowing through the air outlet duct can be smaller. In addition, L1 / R≤1.1, the minimum width L1 on the side of the air outlet duct adjacent to the air outlet can be smaller, thereby increasing the airflow velocity in the air outlet duct, improving the airflow resistance performance of the air outlet, which is beneficial to improving the air supply effect of the duct air conditioner and reducing the backflow of the air outlet.

[0009] Therefore, by ensuring that 0.9≤L1 / R≤1.1 and 0.6≤D1 / R≤0.7, the ducted air conditioner can balance a large air intake volume with strong wind resistance performance, thereby enabling the ducted air conditioner to deliver a large air volume and a good air delivery effect, resulting in a better user experience.

[0010] According to some embodiments of the present invention, the air outlet is located on the front side of the housing, and the width of the air outlet in the vertical direction is L2, where L2 and R satisfy: 1.5≤L2 / R≤2.

[0011] The above technical solution has the following advantages or beneficial effects: It is understandable that when R is constant, the smaller the value of L² / R, the smaller L². By ensuring 1.5 ≤ L² / R, the vertical dimension L² of the air outlet can be larger, allowing the airflow through the air outlet duct to flow smoothly into the room, thereby increasing the air volume of the ducted air conditioner. Furthermore, L² / R ≤ 2 allows the vertical dimension L² of the air outlet to be smaller, thereby increasing the airflow velocity and improving the airflow's resistance to drafts, resulting in better air delivery. Therefore, by limiting 1.5 ≤ L² / R ≤ 2, both the airflow through the air outlet duct can flow smoothly into the room through the air outlet, ensuring a large airflow volume for the ducted air conditioner, and the airflow velocity can be relatively fast, resulting in better airflow resistance and better air delivery.

[0012] According to some embodiments of the present invention, the air outlet duct has a throat, the throat has the smallest width within the air outlet duct, and the width of the air outlet duct increases from the throat to the air outlet along the air outlet direction.

[0013] The above technical solution has the following advantages or beneficial effects: the airflow flowing through the air outlet duct can be squeezed by the side wall of the air outlet duct at the throat, thereby increasing the flow velocity of the air outlet airflow and improving the airflow resistance performance. In addition, the air outlet duct is widened as it approaches the air outlet from the throat along the air outlet direction, which makes the airflow flow more smoothly and helps to increase the air volume of the duct air conditioner.

[0014] According to some embodiments of this utility model, the angle between the cross section of the throat and the front-rear direction of the air duct machine is α, and α satisfies: 40°≤α≤50°.

[0015] The above technical solution has the following advantages or beneficial effects: By ensuring 40°≤α, the angle α between the throat section and the front-rear direction of the duct unit can be relatively large, thus avoiding an excessively large angle between the air outlet direction and the air outlet, resulting in less airflow loss, better airflow performance, and lower noise. Furthermore, with α≤50°, the angle α between the throat section and the front-rear direction of the duct unit is relatively small, allowing the angle between the cross-flow fan's inlet and outlet directions to approach 90°, ensuring smoother airflow and better airflow resistance. Therefore, by limiting 40°≤α≤50°, smooth airflow inlet and outlet of the cross-flow fan, good airflow resistance, minimal airflow loss, and lower noise are all achieved.

[0016] According to some embodiments of the present invention, the air outlet is located close to the air outlet along the air outlet direction of the air outlet duct, and the air outlet duct extends in an arc shape.

[0017] The above technical solution has the following advantages or beneficial effects: the airflow can flow more smoothly along the air outlet duct, which helps to reduce the flow resistance of the airflow, so that the airflow can flow more smoothly through the air outlet duct to the air outlet and then into the room through the air outlet. It can also effectively reduce the noise caused by the airflow.

[0018] According to some embodiments of the present invention, the upper end of the heat exchanger abuts against the side of the volute facing the air inlet; and, along the front-rear direction of the duct machine, the lower end of the heat exchanger is adjacent to the front volute tongue.

[0019] The above technical solution has the following advantages or beneficial effects: the heat exchanger can better cover the inlet of the air duct component, and the airflow flowing into the air duct component can all flow through the heat exchanger and exchange heat with the heat exchanger, thereby improving the heat exchange efficiency between the airflow and the heat exchanger and the heat exchange effect is better.

[0020] According to some embodiments of the present invention, along the front-rear direction of the duct fan, the side of the lower end of the heat exchanger facing the front volute is located between the central axis of the cross-flow fan and the front volute, and the distance between the side of the lower end of the heat exchanger facing the front volute and the central axis of the cross-flow fan is D2; wherein, D2 and D1 satisfy: 0.9≤D2 / D1≤1.

[0021] The above technical solution has the following advantages or beneficial effects: it can ensure that the heat exchange efficiency between the outlet airflow and the heat exchanger is high, and it can also facilitate the layout and assembly of the internal structure of the duct machine, making the structural setting more reasonable.

[0022] According to some embodiments of the present invention, the duct air conditioner further includes: a water receiving tray, which is disposed inside the housing and located below the heat exchanger. The water receiving tray is provided with a water receiving groove, and the heat exchanger is located inside the water receiving groove. The water receiving groove is located close to the air outlet along the front-rear direction of the duct air conditioner and does not extend beyond the side of the front volute facing away from the air outlet.

[0023] The above technical solution has the following advantages or beneficial effects: the water receiving tray is located below the heat exchanger to collect condensate, and is close to the air outlet along the front and rear direction of the duct machine. The heat exchanger will not extend beyond the side of the front volute facing away from the air outlet, and the heat exchanger and the front volute will not interfere with each other in the front and rear direction, so as to facilitate the layout and installation of the heat exchanger and duct components in the casing.

[0024] According to some embodiments of the present invention, the front volute includes: a return flow section extending circumferentially along the cross-flow fan; a diversion section connected to the side of the return flow section near the air outlet, and the diversion section extending in an arc shape; and a guide section connected to the side of the diversion section near the air outlet, extending along the front-rear direction of the duct fan near the air outlet, the guide section being concave in a direction away from the volute and extending in an arc shape.

[0025] The above technical solution has the following advantages or beneficial effects: the airflow from the cross-flow fan can be diverted by the diversion section, most of the airflow can flow to the air outlet through the air outlet duct, and a small part of the airflow can flow back to the cross-flow fan through the gap between the return section and the cross-flow fan, and the airflow is less likely to generate noise when it is diverted.

[0026] According to some embodiments of this utility model, the minimum width L1 of the air outlet duct is the minimum distance between the diversion section and the volute.

[0027] The above technical solution has the following advantages or beneficial effects: when the outlet airflow passes between the diversion section and the volute, the diversion section and the volute can compress the outlet airflow, thereby increasing the pressure of the outlet airflow and thus increasing the flow velocity of the outlet airflow, so as to improve the wind resistance performance of the outlet airflow and improve the airflow effect.

[0028] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0030] Figure 1 A structural schematic diagram of the ductwork machine according to an embodiment of the present utility model;

[0031] Figure 2 A structural schematic diagram of the ductwork machine according to another perspective of an embodiment of the present utility model;

[0032] Figure 3 Exploded view of the ductwork machine according to an embodiment of the present utility model;

[0033] Figure 4 A cross-sectional view of the ductwork machine according to an embodiment of the present utility model;

[0034] Figure 5 This is another cross-sectional view of the duct machine according to an embodiment of the present utility model.

[0035] Figure label:

[0036] 1. Ductless air conditioning unit;

[0037] 100. Housing; 110. Air inlet; 120. Air outlet; 130. Containing cavity;

[0038] 200. Heat exchanger;

[0039] 300. Air duct component; 310. Air outlet duct; 320. Volute housing; 330. Front volute tongue; 331. Return flow section; 332. Flow branch section; 333. Flow guide section;

[0040] 400, Cross-flow fan; 500, Water tray; 510, Water trough. Detailed Implementation

[0041] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", 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 utility model 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 utility model.

[0043] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0044] In the description of this utility model, "multiple" means two or more, and "several" means one or more.

[0045] The following description, with reference to the accompanying drawings, describes a ductwork unit 1 according to an embodiment of the present invention.

[0046] like Figures 1-5 As shown in the attached figure, the left and right directions are the left and right directions of the duct unit 1, which is also the length direction of the duct unit 1; the front and back directions are the front and back directions of the duct unit 1; and the up and down directions are the up and down directions of the duct unit 1.

[0047] According to an embodiment of the present utility model, the duct air conditioner 1 may include a housing 100. The housing 100 is provided with an air inlet 110 and an air outlet 120. The air inlet 110 may be located on the rear side of the housing 100, and the air outlet 120 may be located on the front side of the housing 100. Air can flow into the housing 100 through the air inlet 110 and flow out of the housing 100 through the air outlet 120.

[0048] The ducted air conditioner 1 may include a heat exchanger 200, which is located inside the casing 100 and adjacent to the air inlet 110. In this way, the air flowing into the ducted air conditioner 1 can exchange heat with the refrigerant in the heat exchanger 200, thereby raising or lowering the air temperature. Subsequently, the air can flow into the room from the air outlet 120 to achieve heating or cooling of the room.

[0049] The ducted air conditioner 1 may include an air duct component 300, which is located inside the housing 100 and on the side of the heat exchanger 200 facing the air outlet 120. The air duct component 300 is constructed with an air outlet duct 310, which is connected to the air outlet 120. In this way, the air duct component 300 can guide the airflow, making the airflow into the housing 100 more orderly.

[0050] The ducted air conditioner 1 may include a cross-flow fan 400, which is disposed within the housing 100 and at least partially within the ductwork 300. The cross-flow fan 400 drives air to enter the housing 100 from the air inlet 110, and after exchanging heat with the heat exchanger 200, the air flows into the room from the air outlet 120. That is, the cross-flow fan 400 can accelerate the airflow rate, which is beneficial to improving the heat exchange efficiency between the air and the heat exchanger 200.

[0051] The air duct component 300 may include a volute 320. The housing 100 has a receiving cavity 130 inside. The volute 320 is located on the upper side of the receiving cavity 130, that is, the volute 320 is adjacent to the upper side wall of the receiving cavity 130.

[0052] The air duct component 300 may further include a front volute 330, which is located on the lower side of the receiving cavity 130, i.e., the volute 320 is adjacent to the lower sidewall of the receiving cavity 130. A portion of the front volute 330 extends circumferentially along the cross-flow fan 400 and is spaced apart from the cross-flow fan 400, and an air outlet duct 310 is formed between the front volute 330 and the volute 320. A portion of the cross-flow fan 400 may be located within the air duct component 300. When the cross-flow fan 400 is operating, it can drive the air after heat exchange with the heat exchanger 200 to flow towards the air outlet duct 310. The air outlet duct 310 can then guide the heat exchange airflow, allowing it to flow along the air outlet duct 310 to the air outlet 120 and into the room, resulting in smoother airflow.

[0053] Furthermore, the outer radius of the cross-flow fan 400 is defined as R. Wherein, as... Figure 4 As shown, the outer radius R of the cross-flow fan 400 is half of the maximum outer diameter of the blades of the cross-flow fan 400.

[0054] In addition, the minimum width of the air outlet 310 on the side adjacent to the air outlet 120 is L1.

[0055] Furthermore, in the front-rear direction of the duct unit 1, the front volute 330 is located between the central axis of the cross-flow fan 400 and the air outlet 120, and along the front-rear direction of the duct unit 1, the distance between the side of the front volute 330 facing the air inlet 110 and the central axis of the cross-flow fan 400 is D1.

[0056] Furthermore, R, L1, and D1 satisfy: 0.9≤L1 / R≤1.1, and 0.6≤D1 / R≤0.7.

[0057] Specifically, along the front-rear direction of the duct unit 1, the distance between the side of the front volute 330 facing the air inlet 110 and the central axis of the cross-flow fan 400 is D1, and 0.6 ≤ D1 / R. Wherein, when the value of R is constant, the smaller the value of D1 / R, the smaller D1 is, and the larger the extension dimension of the front volute in the front-rear direction will be; conversely, the larger the value of D1 / R, the larger D1 is, and the smaller the extension dimension of the front volute in the front-rear direction will be.

[0058] In other words, along the front-to-back direction of the ducted air conditioner 1, the distance D1 between the side of the front volute 330 facing the air inlet 110 and the central axis of the cross-flow fan 400 cannot be too small. If D1 is too small, it will cause the front volute 330 to extend too far in the front-to-back direction, that is, the front volute 330 will extend too far backward. In this case, the front volute 330 will cause the air intake space of the cross-flow fan 400 to become smaller, and the air intake volume of the cross-flow fan 400 will decrease. Therefore, D1 / R cannot be less than 0.6.

[0059] Preferably, 0.62≤D1 / R, so that the value of D1 can be relatively large, thereby making the extension dimension of the front volute 330 in the front-rear direction relatively small. The front volute 330 will not excessively affect the air intake space of the cross-flow fan 400, thereby ensuring that the air intake volume of the cross-flow fan 400 can be relatively large, so that the air intake volume of the duct unit 1 is sufficient.

[0060] More preferably, 0.64≤D1 / R, which can further reduce the extension dimension of the front volute 330 in the front-rear direction, and the air intake space of the cross-flow fan 400 can be larger, further increasing the air intake volume of the cross-flow fan 400, and making the air intake volume of the duct unit 1 more sufficient.

[0061] In some specific embodiments, along the front-rear direction of the duct fan 1, the distance between the side of the outer radius R of the cross-flow fan 400 facing the air inlet 110 and the central axis of the cross-flow fan 400 is D1, and D1 / R≤0.7.

[0062] In other words, along the front-to-back direction of the ducted air conditioner 1, the distance D1 between the side of the front volute 330 facing the air inlet 110 and the central axis of the cross-flow fan 400 cannot be too large. If D1 is too large, the extension dimension of the front volute 330 in the front-to-back direction will be too short, that is, the rearward extension dimension of the front volute 330 will be too short. At this time, the flow channel formed between the front volute 330 and the cross-flow fan 400 will be too short, which will cause whistling and other sound quality problems when air flows between the front volute 330 and the cross-flow fan 400. Therefore, D1 / R cannot be greater than 0.7.

[0063] Preferably, D1 / R ≤ 0.68, so that the value of D1 can be small, thereby allowing the front volute tongue 330 to have a larger extension dimension in the front-rear direction, so that the flow channel between the front volute tongue 330 and the cross-flow fan 400 is longer, thereby reducing the noise when air flows through the flow channel.

[0064] More preferably, D1 / R ≤ 0.66, which can further increase the extension dimension of the front volute 330 in the front-rear direction, so that the flow channel between the front volute 330 and the cross-flow fan 400 can be longer, further reducing the noise when the air flows through the flow channel.

[0065] Specifically, 0.6 ≤ D1 / R ≤ 0.7. For example, D1 / R can be 0.6, 0.62, 0.64, 0.66, 0.68, or 0.7. This setting ensures a large air intake for the cross-flow fan 400, providing sufficient airflow for the duct unit 1, while also reducing noise from the airflow between the cross-flow fan 400 and the front volute 330.

[0066] In some specific embodiments, the outer radius of the cross-flow fan 400 is R, and the minimum width of the air outlet duct 310 adjacent to the air outlet 120 is L1, and 0.9 ≤ L1 / R. Wherein, when the value of R is constant, the smaller the value of L1 / R, the smaller L1 is.

[0067] In other words, the minimum width L1 of the air outlet duct 310 adjacent to the air outlet 120 cannot be too small. If L1 is too small, the air outlet resistance of the air outlet duct 310 will be large, the airflow resistance when passing through the air outlet duct 310 will be large, and the air outlet smoothness will be poor. Therefore, L1 / R cannot be less than 0.9.

[0068] Preferably, 0.95≤L1 / R, so that the minimum width L1 of the air outlet duct 310 adjacent to the air outlet 120 can be larger, thereby reducing the air outlet resistance of the air outlet duct 310. The resistance of air flowing through the air outlet duct 310 can be smaller, so that the air can flow smoothly through the air outlet duct 310 to the air outlet 120 and then into the room through the air outlet 120.

[0069] More preferably, 1≤L1 / R, so that the minimum width L1 of the air outlet duct 310 adjacent to the air outlet 120 can be larger, further reducing the air outlet resistance of the air outlet duct 310. The resistance of air flowing through the air outlet duct 310 can be smaller, so that the air can flow more smoothly through the air outlet duct 310 to the air outlet 120, and then flow into the room through the air outlet 120.

[0070] In some specific embodiments, the outer radius of the cross-flow fan 400 is R, and the minimum width of the air outlet duct 310 adjacent to the air outlet 120 is L1, and L1 / R ≤ 1.1. Wherein, when the value of R is constant, the larger the value of L1 / R, the larger L1 is.

[0071] In other words, the minimum width L1 of the side of the air outlet duct 310 adjacent to the air outlet 120 cannot be too large. If L1 is too large, the side wall of the air outlet duct 310 cannot effectively compress the airflow, thus failing to effectively utilize the side wall of the air outlet duct 310 to compress and accelerate the airflow. As a result, the airflow velocity decreases, leading to lower air resistance and poorer air delivery performance of the duct unit 1. Therefore, L1 / R cannot exceed 1.1.

[0072] Preferably, L1 / R ≤ 1.05, so that the minimum width L1 of the air outlet duct 310 adjacent to the air outlet 120 can be smaller, thereby increasing the airflow velocity in the air outlet duct 310, improving the airflow resistance performance, which is beneficial to improving the air supply effect of the air duct machine 1, and reducing the backflow of the air outlet.

[0073] More preferably, L1 / R≤1, which can further reduce the minimum width L1 of the air outlet duct 310 on the side adjacent to the air outlet 120, so as to further increase the airflow velocity in the air outlet duct 310, improve the airflow resistance performance, improve the air delivery effect of the duct unit 1, and make it less prone to backflow.

[0074] Specifically, the outer radius of the cross-flow fan 400 is R, and the minimum width of the air outlet duct 310 adjacent to the air outlet 120 is L1, where 0.9 ≤ L1 / R ≤ 1.1. For example, L1 / R can be 0.9, 0.92, 0.94, 0.96, 0.98, 1, 1.02, 1.04, 1.06, 1.08, or 1.1. This setting avoids excessive air resistance in the air outlet duct 310, ensuring smoother airflow, and also guarantees a relatively high airflow velocity and good air resistance resistance.

[0075] In summary, by limiting 0.9≤L1 / R≤1.1 and 0.6≤D1 / R≤0.7, it is possible to ensure that the cross-flow fan 400 has a large air intake volume and low intake noise, while also ensuring good wind resistance performance of the outlet airflow. Thus, the duct unit 1 can combine the advantages of large outlet air volume and good air delivery effect, resulting in better overall air intake and exhaust performance.

[0076] Thus, the duct air conditioner 1 according to the present invention can balance a large air intake volume and strong wind resistance performance, thereby enabling the duct air conditioner to deliver a large air volume and a good air delivery effect, resulting in a better user experience.

[0077] In some specific embodiments of this utility model, such as Figure 4 As shown, the outer radius of the cross-flow fan 400 is R, and the vertical dimension of the air outlet 120 is L2, where 1.5 ≤ L2 / R. Wherein, when R is constant, the smaller the value of L2 / R, the smaller L2 is.

[0078] In other words, the vertical dimension L2 of the air outlet 120 cannot be too small. If L2 is too small, the side wall of the air outlet 120 will obstruct the airflow from the air duct 310 into the room, which will reduce the air volume of the duct unit 1. Therefore, L2 / R cannot be less than 1.5.

[0079] Preferably, 1.6≤L2 / R, so that the size L2 of the air outlet 120 in the vertical direction can be larger, and the airflow flowing through the air outlet duct 310 can smoothly flow into the room through the air outlet 120, thereby increasing the air volume of the duct unit 1.

[0080] More preferably, 1.7≤L2 / R, which can further increase the vertical dimension L2 of the air outlet 120, allowing the airflow through the air outlet duct 310 to flow more smoothly into the room through the air outlet 120, further improving the air volume of the duct unit 1.

[0081] In some specific embodiments, the outer radius of the cross-flow fan 400 is R, the vertical dimension of the air outlet 120 is L2, and L2 / R≤2.

[0082] In other words, the vertical dimension L2 of the air outlet 120 cannot be too large. If the vertical dimension L2 of the air outlet 120 is too large, it will lead to a decrease in the airflow velocity and a poor air delivery effect. Therefore, L2 / R cannot be greater than 2.

[0083] Preferably, L2 / R ≤ 1.9, which makes the vertical dimension L2 of the air outlet 120 smaller, thereby increasing the airflow velocity, which is beneficial to improving the airflow resistance and air delivery effect.

[0084] More preferably, L2 / R≤1.8, which can further reduce the vertical dimension L2 of the air outlet 120, further improve the airflow velocity, improve the airflow resistance, and improve the air delivery effect of the duct unit 1.

[0085] Specifically, the outer radius of the cross-flow fan 400 is R, and the vertical dimension of the air outlet 120 is L2, where 1.5 ≤ L2 / R ≤ 2. For example, L2 / R can be 1.5, 1.6, 1.7, 1.8, 1.9, or 2. This setting allows the airflow through the air outlet duct 310 to flow smoothly into the room through the air outlet 120, ensuring a large air volume for the duct unit 1, a relatively fast airflow velocity, good airflow resistance, and a good air delivery effect.

[0086] In some specific embodiments of this utility model, such as Figure 4 As shown, the air outlet duct 310 has a throat. The throat has the smallest width within the air outlet duct 310. By setting the throat, the airflow flowing through the air outlet duct 310 can be squeezed by the side wall of the air outlet duct 310 at the throat, thereby increasing the flow rate of the air outlet and improving the wind resistance performance of the air outlet.

[0087] Furthermore, along the air outlet direction of the air outlet duct 310, the width of the air outlet duct 310 is increased from the throat to the air outlet 120. This arrangement allows for smoother airflow and helps to increase the air volume of the duct unit 1.

[0088] In addition, the width of the air outlet duct 310 can be gradually increased from the cross-flow fan 400 near the throat along the air outlet direction of the air outlet duct 310.

[0089] In some specific embodiments of this utility model, such as Figure 4 As shown, the angle α between the cross-section of the throat and the front-back direction of the air duct machine 1 is 40°≤α.

[0090] In other words, the angle α between the cross-section of the throat 311 and the front-back direction of the duct unit 1 cannot be too small. If α is too small, the angle between the air outlet direction of the air outlet duct 310 and the air outlet 120 will be too large, which will cause a loss of air volume and noise problems. Therefore, the angle α cannot be less than 40°.

[0091] Preferably, 42°≤α, so that the angle α between the cross section of the throat and the front-back direction of the air duct 1 can be large, thereby avoiding an excessively large angle between the air outlet direction of the air outlet duct 310 and the air outlet 120, resulting in less air volume loss, better air outlet effect of the air duct 1, and lower air outlet noise.

[0092] More preferably, 44°≤α, which can further increase the angle α between the cross section of the throat and the front-back direction of the air duct 1, and the angle between the air outlet direction of the air outlet duct 310 and the air outlet 120 can be smaller, the loss of air volume can be smaller, further improving the air outlet effect of the air duct 1, and the air outlet noise can be smaller.

[0093] In some specific embodiments, the angle α between the cross-section of the throat and the front-rear direction of the duct unit 1 is ≤ 50°. It should be noted that the optimal inlet and outlet angle of the cross-flow fan 400 is 90°.

[0094] In other words, the angle α between the throat section and the front-rear direction of the duct unit 1 cannot be too large. If α is too large, the angle between the air intake direction and the air outlet direction of the cross-flow fan 400 will be large, which will obstruct the air intake of the cross-flow fan 400, reduce the airflow of the cross-flow fan 400, and result in poor wind resistance performance. Therefore, the angle α cannot be greater than 50°.

[0095] Preferably, α ≤ 48°, so that the angle α between the cross section of the throat and the front-back direction of the air duct 1 is small, so that the angle between the air inlet direction and the air outlet direction of the cross-flow fan 400 can be close to 90°, the air inlet and outlet of the cross-flow fan 400 can be smoother, and the airflow resistance performance can be better.

[0096] More preferably, α≤46°, so that the angle α between the cross section of the throat and the front-back direction of the air duct 1 can be smaller, the angle between the air inlet direction of the cross-flow fan 400 and the air outlet direction of the cross-flow fan 400 can be closer to 90°, the air inlet and outlet of the cross-flow fan 400 can be smoother, and the airflow resistance performance can be better.

[0097] Specifically, the angle α between the cross section of the throat and the front-back direction of the duct unit 1 is 40°≤α≤50°. For example, α can be 40°, 42°, 44°, 46°, 48° or 50°. This setting can ensure smooth airflow in and out of the cross-flow fan 400, good airflow resistance, avoid large loss of airflow volume, and reduce noise.

[0098] In some specific embodiments of this utility model, such as Figure 4 and Figure 5 As shown, the air outlet duct 310 extends in an arc shape near the air outlet 120 along the air outlet direction. This design allows the airflow to flow more smoothly along the air outlet duct 310, reducing airflow resistance and enabling the airflow to pass more smoothly through the air outlet duct 310 to the air outlet 120 and then into the room. Furthermore, this effectively reduces noise caused by the airflow.

[0099] In some specific embodiments of this utility model, such as Figure 4 As shown, the upper end of the heat exchanger 200 abuts against the side of the volute 320 facing the air inlet 110, and the lower end of the heat exchanger 200 is adjacent to the front volute tongue 330 along the front-rear direction of the air duct machine 1.

[0100] The heat exchanger 200 is located inside the casing 100 and between the air inlet 110 and the air duct 300.

[0101] With this configuration, the heat exchanger 200 can better cover the inlet of the air duct component 300, and the airflow flowing into the air duct component 300 can all flow through the heat exchanger 200 and exchange heat with the heat exchanger 200, thereby improving the heat exchange efficiency between the airflow and the heat exchanger and resulting in a better heat exchange effect.

[0102] In some specific embodiments of this utility model, such as Figure 4 As shown, along the front-rear direction of the ducted air conditioner 1, the side of the lower end of the heat exchanger 200 facing the front volute 330 is located between the central axis of the cross-flow fan 400 and the front volute 330, and the distance between the side of the lower end of the heat exchanger 200 facing the front volute 330 and the central axis of the cross-flow fan 400 is D2. Wherein, D2 and D1 satisfy: 0.9 ≤ D2 / D1 ≤ 1.

[0103] In some specific embodiments, 0.9 ≤ D2 / D1.

[0104] In other words, the distance between the lower end of the heat exchanger 200 and the front volute 330 cannot be too large. If the distance between the heat exchanger 200 and the front volute 330 is too large, some air may not flow directly into the air duct 300 without passing through the heat exchanger 200, resulting in poor heat exchange performance. Therefore, D2 / D1 cannot be less than 0.9.

[0105] Preferably, 0.92≤D2 / D1, the distance between the lower end of the heat exchanger 200 and the front volute 330 can be small, so as to ensure that most of the air can exchange heat with the heat exchanger 200 before flowing into the air duct 300, resulting in better heat exchange effect.

[0106] In some specific embodiments, the distance between the side of the lower end of the heat exchanger 200 facing the front volute 330 and the central axis of the cross-flow fan 400 is D2, the distance between the outer radius R of the cross-flow fan 400, the side of the front volute 330 facing the air inlet 110 and the central axis of the cross-flow fan 400 is D1, and D2 / D1≤1.

[0107] In other words, the distance between the lower end of the heat exchanger 200 and the front volute 330 cannot be too small. If the distance between the heat exchanger 200 and the front volute 330 is too small, the heat exchanger 200 and the front volute 330 will interfere with each other in the front-back direction, making it inconvenient for layout and assembly, and thus preventing the internal structure of the duct unit 1 from being compact. Therefore, D2 / D1 cannot be greater than 1.

[0108] Preferably, D2 / D1≤0.98, so that the gap between the lower end of the heat exchanger 200 and the front volute 330 is not too small, so that the gap can be used to absorb assembly errors and make the layout and assembly of the heat exchanger 200 and the air duct component 300 easier.

[0109] Specifically, the distance between the side of the heat exchanger 200 facing the front volute 330 and the central axis of the cross-flow fan 400 is D2, and the distance between the outer radius R of the cross-flow fan 400, the side of the front volute 330 facing the air inlet 110 and the central axis of the cross-flow fan 400 is D1, and 0.9≤D2 / D1≤1.

[0110] For example, D2 / D1 can be 0.9, 0.92, 0.94, 0.96, 0.98 or 1. This setting can ensure the heat exchange efficiency between the outlet airflow and the heat exchanger 200, and also facilitate the layout and assembly of the internal structure of the duct unit 1, making the structural setting more reasonable.

[0111] In some specific embodiments of this utility model, such as Figures 3-5 As shown, the duct unit 1 may also include a water receiving tray 500.

[0112] The water receiving tray 500 is located inside the casing 100 and below the heat exchanger 200. The water receiving tray 500 is provided with a water receiving trough 510. The heat exchanger 200 is located inside the water receiving trough 510. The water receiving tray 500 can be used to collect condensate from the heat exchanger 200.

[0113] Among them, along the front and rear direction of the air duct machine 1, close to the air outlet 120, the water receiving tank 510 does not extend beyond the front volute 330 on the side opposite to the air outlet 120.

[0114] With this configuration, the heat exchanger 200 is placed inside the water receiving tank 510. It is close to the air outlet 120 along the front-back direction of the duct unit 1. The heat exchanger 200 will not extend beyond the side of the front volute 330 facing away from the air outlet 120. The heat exchanger 200 and the front volute 330 will not interfere with each other in the front-back direction, so as to facilitate the layout and installation of the heat exchanger 200 and the air duct component 300 within the casing 100.

[0115] In some specific embodiments of this utility model, such as Figure 4 and Figure 5 As shown, the front volute 330 may include a return section 331, which extends circumferentially along the cross-flow fan 400. The return section 331 may be spaced apart from the cross-flow fan 400 and form a flow channel with the cross-flow fan 400. A small portion of the airflow can be returned through this flow channel and then guided by the cross-flow fan 400 to the air outlet duct 310.

[0116] In addition, the front volute 330 may include a diversion section 332, which is connected to the side of the return section 331 near the air outlet 120 and extends in an arc shape.

[0117] With this configuration, the airflow from the cross-flow fan 400 can be diverted by the diversion section 332. Most of the airflow can flow to the air outlet through the air outlet duct 310, and a small portion of the airflow can flow back to the cross-flow fan 400 through the gap between the return section 331 and the cross-flow fan 400. Moreover, the airflow is less likely to generate noise during diversion.

[0118] Furthermore, the front volute 330 may also include a guide section 333, which is connected to the side of the diverter section 332 near the air outlet 120 and extends towards the air outlet 120 along the front-rear direction of the duct unit 1. The guide section 333 is concave and extends in an arc shape away from the volute 320. Specifically, the volute 320 is concave and extends in an arc shape away from the front volute 330 along the front-rear direction of the duct unit 1 near the air outlet.

[0119] This design allows the airflow to flow more smoothly along the guide section 333, reducing airflow resistance and enabling the airflow to pass more smoothly through the air outlet 310 to the air outlet 120 and then into the room. Furthermore, this effectively reduces noise caused by the airflow.

[0120] In some specific embodiments of this utility model, such as Figure 4 As shown, the minimum width L1 of the outlet air duct 310 is the minimum distance between the diverter section 332 and the volute 320. That is, the throat of the outlet air duct 310 is defined between the diverter section 332 and the volute 320. In this way, when the outlet airflow passes between the diverter section 332 and the volute 320, the diverter section 332 and the volute 320 can compress the outlet airflow, thereby increasing the pressure of the outlet airflow and increasing the flow velocity of the outlet airflow, resulting in better wind resistance performance and better airflow effect.

[0121] Other components and operations of the ductwork unit 1 according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0122] The ducted air conditioner 1 of this invention performs a refrigeration cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0123] The compressor compresses refrigerant gas under high temperature and pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0124] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the ducted air conditioner 1 regulates the temperature and humidity of the indoor space.

[0125] In the description of this specification, references to terms such as "specific embodiment" and "specific example" refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0126] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A ducted air conditioning unit, comprising: The housing has an air inlet and an air outlet, and an accommodating cavity is formed inside the housing. A heat exchanger, wherein the heat exchanger is disposed within the housing and adjacent to the air inlet; A duct component is disposed inside the housing and located on the side of the heat exchanger facing the air outlet. The duct component is configured with an air outlet duct, which is connected to the air outlet. A cross-flow fan is disposed inside the housing and at least partially located within the air duct component. The cross-flow fan drives air to enter the housing from the air inlet, and the air flows into the room from the air outlet after exchanging heat with the heat exchanger. Its features are, The air duct component includes: A volute, the volute being disposed on the upper side of the accommodating cavity; The front volute is located on the lower side of the accommodating cavity. A portion of the front volute extends circumferentially along the cross-flow fan and is spaced apart from the cross-flow fan. The air outlet duct is formed between the front volute and the volute. Wherein, the outer radius of the cross-flow fan is defined as R; The minimum width of the air outlet duct on the side adjacent to the air outlet is L1; In the front-rear direction of the duct unit, the front volute is located between the central axis of the cross-flow fan and the air outlet, and along the front-rear direction, the distance between the side of the front volute facing the air inlet and the central axis of the cross-flow fan is D1. R, L1, and D1 satisfy: 0.9 ≤ L1 / R ≤ 1.1, and 0.6 ≤ D1 / R ≤ 0.

7.

2. The duct air conditioner according to claim 1, characterized in that, The air outlet is located on the front side of the housing, and the width of the air outlet in the vertical direction is L2, where L2 and R satisfy: 1.5≤L2 / R≤2.

3. The duct air conditioner according to claim 1, characterized in that, The air outlet duct has a throat, which has the smallest width within the air outlet duct, and the width of the air outlet duct increases from the throat towards the air outlet along the air outlet direction.

4. The duct air conditioner according to claim 3, characterized in that, The angle between the cross section of the throat and the front-back direction of the air duct machine is α, and α satisfies: 40°≤α≤50°.

5. The duct air conditioner according to claim 3, characterized in that, Approaching the air outlet along the air outlet direction of the air outlet duct, the air outlet duct extends in an arc shape.

6. The duct air conditioner according to claim 1, characterized in that, The upper end of the heat exchanger abuts against the side of the volute facing the air inlet; and, Along the front-to-back direction of the duct unit, the lower end of the heat exchanger is adjacent to the front volute.

7. The duct air conditioner according to claim 6, characterized in that, Along the front-back direction of the duct machine, the side of the lower end of the heat exchanger facing the front volute is located between the central axis of the cross-flow fan and the front volute, and the distance between the side of the lower end of the heat exchanger facing the front volute and the central axis of the cross-flow fan is D2. Among them, D2 and D1 satisfy: 0.9≤D2 / D1≤1.

8. The duct air conditioner according to claim 7, characterized in that, Also includes: A water receiving tray is provided inside the housing and below the heat exchanger. The water receiving tray is provided with a water receiving groove, and the heat exchanger is located inside the water receiving groove. The water receiving trough is located close to the air outlet along the front-rear direction of the duct unit, and does not extend beyond the side of the front volute facing away from the air outlet.

9. The duct air conditioner according to claim 1, characterized in that, The anterior cochlear tongue includes: A recirculation section extends circumferentially along the cross-flow fan; The flow divider section is connected to the side of the return section near the air outlet, and the flow divider section extends in an arc shape. The guide section is connected to the side of the diversion section near the air outlet and extends along the front-rear direction of the duct machine close to the air outlet. The guide section is concave and extends in an arc shape away from the volute.

10. The duct air conditioner according to claim 9, characterized in that, The minimum width L1 of the air outlet duct is the minimum distance between the diversion section and the volute.

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