Air conditioner

Abstract

The utility model discloses an air conditioner which comprises a machine shell assembly, a fan assembly and a heat exchanger assembly. An air inlet and an air outlet are formed in the machine shell assembly. The draught fan assembly is arranged in the machine shell assembly and comprises an air channel volute and a draught fan, an air inlet cavity is defined between the air inlet side of the air channel volute and the machine shell assembly, the draught fan is installed on the air channel volute and comprises a wind wheel and a motor, the motor is connected with the wind wheel, and at least part of the wind wheel is located in an air channel and located at the air inlet end of the air channel volute. The air duct volute is provided with at least one jet flow channel, and the jet flow channel is located at the air inlet end of the air duct volute and communicates with the air inlet cavity and the air duct. According to the air conditioner, when the air conditioner works, airflow flows into the side close to the wind wheel from the side, away from the wind wheel, of the air flue volute through the jet flow channel, the flow separation phenomenon of the part, close to the wind wheel, of the air flue volute is supplemented and reduced, and the work efficiency of a fan is improved; in addition, pneumatic noise generated by friction between the separation vortex and the air duct volute can be reduced.

Description

Technical Field

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

[0002] In related technologies, air conditioners include a duct casing and a fan. When the air conditioner is working, the fan rotates, driving airflow. The space between the fan and the duct casing is relatively small, causing airflow separation in this area. This results in the formation of separation vortices within the airflow in this space, which reduces the fan's efficiency. Furthermore, the friction between the separation vortices and the duct casing generates aerodynamic noise, leading to higher noise levels in the air conditioner and a reduced user experience. Utility Model Content

[0003] The present invention 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 an air conditioner that has at least one jet channel on the duct casing, located at the air inlet end of the duct casing and connecting the air inlet cavity and the duct. When the air conditioner is working, the impeller rotates, driving the airflow along the duct. A negative pressure is formed near the duct or impeller. The airflow in the air inlet cavity, located between the outer wall of the duct casing and the heat exchanger assembly, flows into the duct through the jet channel under the action of the pressure difference between the inside and outside of the duct casing, and flows into the gap between the impeller and the duct casing. This can replenish the airflow in the gap between the impeller and the duct casing, reduce the flow separation phenomenon in the space near the impeller of the duct casing, improve the working efficiency of the fan, and help improve the working efficiency of the air conditioner. Furthermore, the airflow flowing into the duct through the jet channel and into the gap between the impeller and the duct casing can also reduce the separation vortex in the gap between the impeller and the duct casing, thereby reducing the aerodynamic noise generated by the friction between the separation vortex and the duct casing, which helps to reduce the operating noise of the air conditioner.

[0004] An air conditioner according to an embodiment of the present invention includes: a housing assembly having an air inlet and an air outlet; a fan assembly disposed within the housing assembly and including a duct volute and a fan, wherein an air inlet cavity is defined between the air inlet side of the duct volute and the housing assembly, the fan being mounted on the duct volute and including a fan wheel and a motor, the motor being connected to the fan wheel, at least a portion of the fan wheel being located within the duct and at the air inlet end of the duct volute, the duct volute having at least one jet channel located at the air inlet end of the duct volute and the jet channel connecting the air inlet cavity and the duct; and a heat exchanger assembly disposed within the air inlet cavity.

[0005] According to the embodiment of this utility model, the air conditioner has at least one jet channel on the duct volute, with the jet channel located at the air inlet end of the duct volute and connecting the air inlet cavity and the duct. When the air conditioner is working, the impeller rotates, driving the airflow to flow along the duct. A negative pressure is formed near the duct or the impeller. The airflow in the air inlet cavity between the outer wall of the duct volute and the heat exchanger assembly flows into the duct through the jet channel under the action of the pressure difference between the inside and outside of the duct volute, and flows into the gap between the impeller and the duct volute. This can replenish the airflow in the gap between the impeller and the duct volute, reduce the flow separation phenomenon in the space near the impeller of the duct volute, improve the working efficiency of the fan, and help improve the working efficiency of the air conditioner. Furthermore, the airflow flowing into the duct through the jet channel and into the gap between the impeller and the duct volute can also reduce the separation vortex in the gap between the impeller and the duct volute, thereby reducing the aerodynamic noise generated by the friction between the separation vortex and the duct volute, which helps to reduce the operating noise of the air conditioner.

[0006] According to some embodiments of this utility model, the cross section obtained by cutting the volute of the air duct with a plane perpendicular to the rotation axis of the wind turbine is the volute cross section. The outline of the volute cross section facing the air duct side constitutes the air duct profile. In the extension direction of the air duct profile, the width of the jet channel is D2, 1mm≤D2≤3mm.

[0007] According to some embodiments of this utility model, the cross section obtained by cutting the volute casing with a plane perpendicular to the axial direction of the impeller is the volute casing cross section. The outline of the volute casing cross section facing the duct side constitutes the duct profile. The tangent of the duct profile corresponding to the location of the jet channel is the duct tangent. On the volute casing cross section, the angle between the central axis of the jet channel and the duct tangent is θ, where θ < 90°.

[0008] According to some embodiments of this utility model, θ≤30°.

[0009] According to some embodiments of the present invention, the jet channel is formed as a circular hole, an elliptical hole, a polygonal hole, or an elongated hole extending along the axial direction of the impeller.

[0010] According to some embodiments of the present invention, all the jet channels are divided into a group of jet channels or multiple groups of jet channels arranged at intervals along the extension direction of the duct profile. Each group of jet channels includes one jet channel or multiple jet channels arranged at intervals along the axial direction of the impeller. The cross section obtained by cutting the duct volute with a plane perpendicular to the axial direction of the impeller is the volute cross section. The contour line of the volute cross section facing the duct side constitutes the duct profile.

[0011] According to some embodiments of this utility model, the number of jet channel groups is N, where N≤3.

[0012] According to some embodiments of the present invention, in the extension direction of the air duct profile, the distance between two adjacent groups of jet channels is d, and the width of the jet channel is D2, where D2 < d.

[0013] According to some embodiments of the present invention, the sum of the lengths of all jet channels in a single jet channel group is Li, and the length of the air duct in the axial direction of the wind turbine is Ls, where 0.5*Ls≤Li≤0.95*Ls. The length of the jet channel refers to the dimension of the jet channel in the axial direction of the wind turbine.

[0014] According to some embodiments of the present invention, the axial direction of the impeller is left-right, the air outlet is formed at the lower front part of the housing assembly, and the air inlet is formed at the top of the housing assembly.

[0015] According to some embodiments of the present invention, the housing assembly includes a chassis component, the chassis component is connected to the air duct volute and together with the air inlet end of the air duct volute defines a water receiving groove, the bottom of the heat exchanger assembly is located in the water receiving groove, the wall surface of the air inlet end facing the water receiving groove is a first wall surface, the jet channel penetrates the first wall surface to form a channel opening, and the lowest position of the channel opening at the lowest position is higher than the bottom wall of the water receiving groove.

[0016] According to some embodiments of the present invention, the distance between the lowest position of the outer opening of the channel at the lowest position and the bottom wall of the water receiving tank is D1, where D1 ≥ 15 mm.

[0017] According to some embodiments of the present invention, the air duct volute includes a front volute and a rear volute, the front volute is connected to the front side of the rear volute, and the jet channel is located at the air inlet end of the rear volute.

[0018] 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

[0019] 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:

[0020] Figure 1 This refers to the indoor unit of an air conditioner according to some embodiments of the present invention;

[0021] Figure 2 yes Figure 1 A front view of part of the structure of a central air conditioning indoor unit;

[0022] Figure 3 This is a front view of the structure of the indoor unit of an air conditioner according to other embodiments of the present invention;

[0023] Figure 4 This is a cross-sectional view of an indoor air conditioner unit according to some embodiments of the present utility model;

[0024] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0025] Figure label:

[0026] 100. Air conditioner indoor unit;

[0027] 10. Casing assembly; 11. Air inlet; 12. Air outlet; 13. Chassis components; 14. Water collection tank; 15. First wall surface; 16. Bottom wall of water collection tank; 17. Air guide plate;

[0028] 20. Fan assembly; 21. Air duct casing; 201. Airflow inlet; 22. Front casing; 23. Rear casing; 24. Air inlet end; 25. Air inlet cavity; 26. Fan; 27. Impeller; 29. ​​Jet channel; 30. Casing cross-section; 31. Air duct; 32. Air duct profile; 33. Air duct tangent; 34. Jet channel assembly; 35. Channel outer opening;

[0029] 40. Heat exchanger assembly. Detailed Implementation

[0030] 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.

[0031] The following is for reference. Figures 1-5 This invention describes an air conditioner according to an embodiment of the present invention.

[0032] An air conditioner according to an embodiment of the present invention includes: a housing assembly 10, a fan assembly 20, and a heat exchanger assembly 40.

[0033] For example, the air conditioner is a split wall-mounted air conditioner, which includes an indoor unit 100 and an outdoor unit. The indoor unit 100 includes the aforementioned casing assembly 10, fan assembly 20, and heat exchanger assembly 40.

[0034] Reference Figure 1The housing assembly 10 has an air inlet 11 and an air outlet 12. Air enters the housing assembly 10 through the air inlet 11 and is blown out of the room through the air outlet 12. For example, in a split wall-mounted air conditioner, the air inlet 11 is formed at the top of the housing, and the air outlet 12 is formed at the lower front of the housing, so that the airflow can leave the air conditioner from the lower front air outlet 12.

[0035] For example, the air conditioner also includes an air guide plate 17, which is rotatably disposed at the air outlet 12.

[0036] Reference Figure 4 The fan assembly 20 is disposed within the housing assembly 10 and includes a duct volute 21 and a fan 26. An air inlet cavity 25 is defined between the air inlet side of the duct volute 21 and the housing assembly 10. The fan 26 is mounted on the duct volute 21 and includes a fan wheel 27 and a motor. The motor is connected to the fan wheel 27 to drive the fan wheel 27 to rotate. At least a portion of the fan wheel 27 is located within the duct 31 and the fan wheel 27 is located at the air inlet end 24 of the duct volute 21. The heat exchanger assembly 40 is disposed within the air inlet cavity 25. When the air conditioner is operating, the fan assembly 20 operates, driving the airflow outside the housing assembly 10 to enter the air inlet cavity 25 from the air inlet 11 and exchange heat with the heat exchanger assembly 40. The heat-exchanged airflow enters the duct 31 from the airflow inlet 201 of the duct volute 21, is pressurized by the fan wheel 27, and is blown out of the air outlet 12 into the room.

[0037] The duct volute 21 is provided with at least one jet channel 29, which is located at the air inlet end 24 of the duct volute 21 and connects the air inlet cavity 25 and the air duct 31. The opening of the air inlet end 24 forms the airflow inlet 201 of the duct volute 21. By providing at least one jet channel 29 on the duct volute 21, and positioning the jet channel 29 at the air inlet end 24 of the duct volute 21 and connecting the air inlet cavity 25 and the air duct 31, when the air conditioner is working, the impeller 27 rotates, driving the airflow to flow along the air duct 31. A negative pressure is formed in the air duct 31 or near the impeller 27. The airflow located between the outer wall of the duct volute 21 and the heat exchanger assembly 40 in the air inlet cavity 25 flows into the air duct 31 through the jet channel 29 under the action of the pressure difference between the inside and outside of the duct volute 21, and flows into the space between the impeller 27 and the duct volute 21. The gap can replenish the airflow in the gap between the impeller 27 and the duct volute 21, reduce the flow separation phenomenon in the space of the duct volute 21 near the impeller 27, improve the working efficiency of the fan 26, and help improve the working efficiency of the air conditioner. In addition, the airflow flowing into the duct 31 through the jet channel 29 and into the gap between the impeller 27 and the duct volute 21 can also reduce the separation vortex in the gap between the impeller 27 and the duct volute 21, thereby reducing the aerodynamic noise generated by the friction between the separation vortex and the duct volute 21, which helps to reduce the working noise of the air conditioner.

[0038] When the air conditioner is working, the impeller 27 drives the airflow through the air inlet 11 into the casing assembly 10. After exchanging heat with the heat exchanger assembly 40, the airflow enters the air duct 31 and is then blown out of the air conditioner from the air outlet 12 by the impeller 27. During this process, due to the faster airflow velocity near the impeller 27, a negative pressure is formed in the air duct 31 or near the impeller 27. Under the action of the internal and external pressure difference, some gas enters from the air inlet cavity 25 through the jet channel 29 into the gap between the impeller 27 and the air duct volute 21 to replenish the airflow in the gap between the impeller 27 and the air duct volute 21, thereby reducing the flow separation phenomenon in the part of the air duct 31 near the air duct volute 21 and the impeller 27.

[0039] According to the embodiment of the present invention, the air conditioner has at least one jet channel 29 on the duct volute 21, with the jet channel 29 located at the air inlet end 24 of the duct volute 21 and connecting the air inlet cavity 25 and the air duct 31. When the air conditioner is working, the impeller 27 rotates, driving the airflow to flow along the air duct 31. A negative pressure is formed in the vicinity of the air duct 31 or the impeller 27. The airflow in the air inlet cavity 25 between the outer wall of the duct volute 21 and the heat exchanger assembly 40 flows into the air duct 31 through the jet channel 29 under the action of the pressure difference inside and outside the duct volute 21, and flows into the impeller 27 and the air duct. The gap between the volutes 21 can replenish the airflow in the gap between the impeller 27 and the volute 21, reduce the flow separation phenomenon in the space of the volute 21 near the impeller 27, improve the working efficiency of the fan 26, and help improve the working efficiency of the air conditioner. In addition, the airflow flowing into the duct 31 through the jet channel 29 and into the gap between the impeller 27 and the volute 21 can also reduce the separation vortex in the gap between the impeller 27 and the volute 21, thereby reducing the aerodynamic noise generated by the friction between the separation vortex and the volute 21, which helps to reduce the operating noise of the air conditioner.

[0040] According to some embodiments of this utility model, refer to Figure 4 and Figure 5The cross-section of the volute 21 perpendicular to the rotation axis of the impeller 27 is called the volute cross-section 30. The outline of the volute cross-section 30 facing the duct 31 forms the duct profile 32. In the extension direction of the duct profile 32, the width of the jet channel 29 is D2, where 1mm ≤ D2 ≤ 3mm. For example, the width D2 of the jet channel 29 can be 1mm, 1.5mm, 2mm, 2.5mm, or 3mm. By ensuring that the width D2 of the jet channel 29 is not less than 1 mm, more airflow can flow into the air duct 31 through the jet channel 29, more fully compensating for the airflow in the space between the air duct volute 21 and the impeller 27, and reducing the flow separation phenomenon in the space between the air duct volute 21 and the impeller 27. By ensuring that the width D2 of the jet channel 29 is not greater than 3 mm, the airflow speed can be increased when passing through the jet channel 29, giving this part of the airflow sufficient kinetic energy, thereby enabling this part of the airflow to more fully reduce the flow separation phenomenon in the space between the air duct volute 21 and the impeller 27.

[0041] According to some embodiments of this utility model, refer to Figure 4 and Figure 5 The cross-section of the volute 21 perpendicular to the axial direction of the impeller 27 is called the volute cross-section 30. The outline of the volute cross-section 30 facing the air duct 31 constitutes the air duct profile 32. The tangent of the air duct profile 32 corresponding to the location of the jet channel 29 is the air duct tangent 33. On the volute cross-section 30, the angle between the central axis of the jet channel 29 and the air duct tangent 33 is θ, where θ < 90°. For example, the angle θ between the central axis of the jet channel 29 and the air duct tangent 33 can be 0°, 10°, 30°, 50°, 70°, 80°, etc. When the air conditioner is working, the impeller 27 rotates, driving the airflow. After leaving the impeller 27, the airflow flows along the air duct profile 32 and is thrown out of the air conditioner. By making the angle θ between the central axis of the jet channel 29 and the tangent 33 of the air duct less than 90°, the airflow blowing out from the jet channel 29 can be made to flow in roughly the same direction as the airflow in the air duct 31, reducing the loss of airflow energy and avoiding excessive noise generated by friction between airflows.

[0042] According to some embodiments of this utility model, refer to Figure 4 and Figure 5For example, the angle θ between the central axis of the jet channel 29 and the tangent 33 of the air duct can be 5°, 10°, 15°, 20°, 25°, 30°, etc. When the air conditioner is working, the impeller 27 rotates, driving the airflow. After leaving the impeller 27, the airflow flows along the air duct profile 32 and is thrown out of the air conditioner. By ensuring that the angle θ between the central axis of the jet channel 29 and the tangent 33 of the air duct is ≤30°, the airflow blown out from the jet channel 29 can be more effectively aligned with the airflow direction in the air duct 31, reducing the loss of kinetic energy and avoiding excessive noise generated by friction between airflows.

[0043] According to some embodiments of this utility model, refer to Figure 2 and Figure 3 The jet channel 29 is formed as a circular hole, an elliptical hole, a polygonal hole, or an elongated hole extending along the axial direction of the impeller 27. For example, the jet channel 29 can be multiple circular holes, which are spaced apart along the axial direction of the impeller 27. By forming the jet channel 29 as a circular hole, an elliptical hole, a polygonal hole, or an elongated hole extending along the axial direction of the impeller 27, the jet channel 29 can be made easier to manufacture.

[0044] According to some embodiments of this utility model, refer to Figures 2-5 All jet channels 29 are divided into a group of jet channel groups 34 or multiple groups of jet channel groups 34 arranged at intervals along the extension direction of the duct profile 32. Each group of jet channel groups 34 includes one jet channel 29 or multiple jet channels 29 arranged at intervals along the axial direction of the impeller 27. The cross-section of the duct volute 21 obtained by cutting the plane perpendicular to the axial direction of the impeller 27 is the volute cross-section 30. The contour line of the volute cross-section 30 facing the duct 31 constitutes the duct profile 32. For example, each group of jet channel groups 34 includes multiple jet channels 29 arranged at intervals along the axial direction of the impeller 27. This allows the airflow to be ejected more fully through the jet channels 29 while ensuring sufficient structural strength of the duct volute 21, and can more effectively reduce the flow separation phenomenon in the space between the duct volute 21 and the impeller 27. By dividing the jet channel 29 into multiple groups of jet channel groups 34 arranged at intervals along the extension direction of the duct profile 32, the airflow rate into the gap between the impeller 27 and the duct casing 21 can be increased, more fully compensating for the airflow in the space between the duct casing 21 and the impeller 27, and reducing the flow separation phenomenon in the space between the duct casing 21 and the impeller 27. By making each group of jet channel groups 34 include one jet channel 29 or multiple jet channels 29 arranged at intervals along the axial direction of the impeller 27, the structural strength of the duct casing 21 can be improved while ensuring sufficient airflow into the gap between the impeller 27 and the duct casing 21.

[0045] For example, each jet channel group 34 includes multiple jet channels 29, and the jet channels 29 in each jet channel group 34 have the same length along the axial direction of the impeller 27.

[0046] According to some embodiments of this utility model, refer to Figure 2 and Figure 3 The number of jet channel groups 34 is N, where N ≤ 3. For example, the number N of jet channel groups 34 can be 1, 2, or 3. By ensuring that the number N of jet channel groups 34 is ≤ 3, it is possible to avoid reducing the structural strength of the air duct volute 21 due to having too many jet channel groups 34.

[0047] According to some embodiments of this utility model, refer to Figure 4 and Figure 5 In the extension direction of the duct profile 32, the distance between two adjacent sets of jet channel groups 34 is d, and the width of the jet channel 29 is D2, where D2 < d. By making the width D2 of the jet channel 29 smaller than the distance d between the two adjacent sets of jet channel groups 34, the wind speed can be increased when the airflow passes through the jet channel 29, giving this part of the airflow sufficient kinetic energy. This allows this part of the airflow to more effectively reduce the flow separation phenomenon in the space between the duct volute 21 and the impeller 27; furthermore, it can improve the structural strength of the duct volute 21.

[0048] According to some embodiments of this utility model, refer to Figure 2 and Figure 3 The sum of the lengths of all jet channels 29 in a single jet channel group 34 is Li, and the length of the wind duct 31 in the axial direction of the impeller 27 is Ls, where 0.5*Ls≤Li≤0.95*Ls. The length of the jet channel 29 refers to its dimension in the axial direction of the impeller 27. For example, the sum of the lengths Li of all jet channels 29 in a single jet channel group 34 can be 0.5*Ls, 0.6*Ls, 0.7*Ls, 0.8*Ls, 0.9*Ls, 0.95*Ls, etc. By ensuring that the sum of the lengths Li of all jet channels 29 in a single jet channel group 34 is not less than 0.5*Ls, the jet channels 29 can be long enough to allow sufficient airflow to reduce the flow separation phenomenon in the space between the duct volute 21 and the impeller 27, thereby improving the working efficiency of the air conditioner and reducing its noise. By ensuring that the sum of the lengths Li of all jet channels 29 in a single jet channel group 34 is not greater than 0.95*Ls, while opening jet channels 29 on the duct volute 21 to improve the flow separation phenomenon, the structural strength of the air inlet end 24 of the duct volute 21 can meet the requirements, thus avoiding a significant reduction in the structural strength of the air inlet end 24 of the duct volute 21 that could lead to damage to the duct volute 21.

[0049] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 The fan 27 has its axis pointing left and right. The air outlet 12 is formed at the lower front part of the housing assembly 10, and the air inlet 11 is formed at the top of the housing assembly 10. By forming the air outlet 12 at the lower front part of the housing assembly 10 and the air inlet 11 at the top of the housing assembly 10, airflow can enter the air conditioner from the top of the housing assembly 10 and be discharged from the air outlet 12 at the lower front part by the drive of the fan 27. This allows the airflow to be blown into the room from the air outlet 12 located at the lower front side, thus more effectively adjusting the indoor temperature. It also shortens the distance the airflow travels from the air outlet to the air outlet 12, reduces airflow loss, improves the working efficiency of the fan assembly 20, and enhances the performance of the air conditioner.

[0050] According to some embodiments of this utility model, refer to Figure 4 and Figure 5 The housing assembly 10 includes a chassis component 13, which is connected to the air duct volute 21. The air inlet end 24 of the chassis component 13 and the air duct volute 21 together define a water receiving tank 14. The bottom of the heat exchanger assembly 40 is located within the water receiving tank 14. The wall surface of the air inlet end 24 facing the water receiving tank 14 is a first wall surface 15. The jet channel 29 penetrates the first wall surface 15 to form a channel opening 35. The lowest position of the channel opening 35 is higher than the bottom wall of the water receiving tank 14. By making the lowest position of the channel opening 35 of the jet channel 29 higher than the bottom wall of the water receiving tank 14, water in the water receiving tank 14 can be prevented from flowing into the jet channel 29 through the channel opening 35 and then into the air duct 31.

[0051] For example, refer to Figure 4 The bottom wall of the water receiving tank 14 is the water receiving tank bottom wall 16. The water receiving tank bottom wall 16 can extend downward in the direction close to the impeller 27. For example, the opening of the water receiving tank bottom wall 16 located behind the impeller 27 extends downward in the direction from back to front.

[0052] For example, when the jet channel group 34 is a group, the jet channel group 34 includes one or multiple jet channels 29 arranged in the left and right direction. The multiple jet channels 29 in the same jet channel group 34 have the same height position, and the lowest position of the outer opening 35 of one of the jet channels 29 is higher than the bottom wall of the water receiving tank 14.

[0053] For example, when there are multiple jet channel groups 34, the multiple jet channel groups 34 are arranged at intervals in the vertical direction. The multiple jet channels 29 of the same jet channel group 34 have the same height position. The lowest position of the outer opening 35 of one of the jet channels 29 in the jet channel group 34 located at the lowest position is higher than the bottom wall of the water receiving tank 14.

[0054] According to some embodiments of this utility model, refer to Figure 4 and Figure 5 The distance between the lowest point of the channel outlet 35 (at its lowest position) and the bottom wall of the water receiving tank 14 is D1, where D1 ≥ 15 mm. For example, the value of the distance D1 between the lowest point of the channel outlet 35 and the bottom wall of the water receiving tank 14 can be 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, etc. By ensuring that the distance D1 between the lowest point of the channel outlet 35 and the bottom wall of the water receiving tank 14 is not less than 15 mm, water in the water receiving tank 14 can be more effectively prevented from flowing into the jet channel 29 and then into the air duct 31 through the channel outlet 35.

[0055] According to some embodiments of this utility model, refer to Figure 4 and Figure 5 The duct casing 21 includes a front casing 22 and a rear casing 23. The front casing 22 is connected to the front side of the rear casing 23, and the jet channel 29 is located at the air inlet end 24 of the rear casing 23. Because the distance between the impeller 27 and the area near the air inlet end 24 of the rear casing 23 is relatively short, flow separation is more likely to occur in this area when the impeller 27 rotates, and vortices that cannot be discharged are more likely to exist in this area. By placing the jet channel 29 at the air inlet end 24 of the rear casing 23, airflow can be more fully channeled through the jet channel 29 into the area more prone to flow separation, reducing flow separation in the space between the duct casing 21 and the impeller 27, thus improving the air conditioner's efficiency and reducing noise.

[0056] The following reference Figures 1-5 This invention describes an air conditioner according to some specific embodiments of the present invention.

[0057] In this embodiment, the air conditioner is a split wall-mounted air conditioner, which includes an indoor unit 100 and an outdoor unit. The indoor unit 100 includes the aforementioned casing assembly 10, fan assembly 20, and heat exchanger assembly 40.

[0058] The housing assembly 10 has an air inlet 11 and an air outlet 12. A fan assembly 20 is disposed within the housing assembly 10 and includes a duct volute 21 and a fan 26. An air inlet cavity 25 is defined between the air inlet side of the duct volute 21 and the housing assembly 10. The fan 26 is mounted on the duct volute 21 and includes a fan wheel 27 and a motor. The motor is connected to the fan wheel 27. At least a portion of the fan wheel 27 is located within the duct 31 and at the air inlet end 24 of the duct volute 21. At least one jet channel 29 is provided on the duct volute 21, located at the air inlet end 24 of the duct volute 21 and connecting the air inlet cavity 25 and the duct 31. A heat exchanger assembly 40 is disposed within the air inlet cavity 25.

[0059] The cross-section of the volute 21 perpendicular to the rotation axis of the impeller 27 is called the volute cross-section 30. The contour line of the volute cross-section 30 facing the duct 31 forms the duct profile 32. In the extension direction of the duct profile 32, the width of the jet channel 29 is D2, where 1mm ≤ D2 ≤ 3mm. The cross-section of the volute 21 perpendicular to the axial direction of the impeller 27 is called the volute cross-section 30. The contour line of the volute cross-section 30 facing the duct 31 forms the duct profile 32. The tangent of the duct profile 32 corresponding to the location of the jet channel 29 is called the duct tangent 33. On the volute cross-section 30, the angle between the central axis of the jet channel 29 and the duct tangent 33 is θ, where θ ≤ 30°.

[0060] The jet channel 29 is formed as a circular hole, an elliptical hole, a polygonal hole, or an elongated hole extending along the axial direction of the impeller 27. All jet channels 29 are divided into a group of jet channel groups 34 or multiple groups of jet channel groups 34 arranged at intervals along the extension direction of the duct profile 32. Each group of jet channel groups 34 includes one jet channel 29 or multiple jet channels 29 arranged at intervals along the axial direction of the impeller 27. The cross-section of the duct volute 21 perpendicular to the axial direction of the impeller 27 is the volute cross-section 30. The contour line of the volute cross-section 30 facing the duct 31 constitutes the duct profile 32. The number of jet channel groups 34 is N, where N≤3. In the extension direction of the duct profile 32, the distance between two adjacent groups of jet channel groups 34 is d, and the width of the jet channel 29 is D2, where D2<d. The sum of the lengths of all jet channels 29 in a single jet channel group 34 is Li, and the length of the wind duct 31 in the axial direction of the impeller 27 is Ls, 0.5*Ls≤Li≤0.95*Ls. The length of the jet channel 29 refers to the dimension of the jet channel 29 in the axial direction of the impeller 27.

[0061] The impeller 27 is oriented laterally. An air outlet 12 is formed at the lower front of the housing assembly 10, and an air inlet 11 is formed at the top of the housing assembly 10. The housing assembly 10 includes a chassis component 13, which is connected to the duct volute 21 and, together with the air inlet end 24 of the duct volute 21, defines a water collection tank 14. The bottom of the heat exchanger assembly 40 is located within the water collection tank 14. The wall surface of the air inlet end 24 facing the water collection tank 14 is a first wall surface 15. A jet channel 29 penetrates the first wall surface 15 to form a channel opening 35. The lowest point of the channel opening 35 is higher than the bottom wall of the water collection tank 14. The distance between the lowest point of the channel opening 35 and the bottom wall of the water collection tank 14 is D1, where D1 ≥ 15 mm.

[0062] The air duct volute 21 includes a front volute 22 and a rear volute 23. The front volute 22 is connected to the front side of the rear volute 23, and the jet channel 29 is located at the air inlet end 24 of the rear volute 23.

[0063] 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", "clockwise", "counterclockwise", "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.

[0064] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0065] In the description of this utility model, "multiple" means two or more.

[0066] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0067] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] 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. An air conditioner, characterized in that, include: The housing assembly has an air inlet and an air outlet; A fan assembly is disposed within the housing assembly and includes a duct volute and a fan. An air inlet cavity is defined between the air inlet side of the duct volute and the housing assembly. The fan is mounted on the duct volute and includes a rotor and a motor. The motor is connected to the rotor. At least a portion of the rotor is located within the duct and at the air inlet end of the duct volute. The duct volute is provided with at least one jet channel, which is located at the air inlet end of the duct volute and connects the air inlet cavity and the duct. The heat exchanger assembly is located inside the air inlet cavity.

2. The air conditioner according to claim 1, characterized in that, The cross section obtained by cutting the volute casing with a plane perpendicular to the rotation axis of the wind turbine is the volute casing cross section. The outline of the volute casing cross section facing the duct side constitutes the duct profile. In the extension direction of the duct profile, the width of the jet channel is D2, where 1mm≤D2≤3mm.

3. The air conditioner according to claim 1, characterized in that, The cross section obtained by cutting the volute casing with a plane perpendicular to the axial direction of the impeller is the volute casing cross section. The outline of the volute casing cross section facing the duct side constitutes the duct profile. The tangent of the duct profile corresponding to the location of the jet channel is the duct tangent. On the volute casing cross section, the angle between the central axis of the jet channel and the duct tangent is θ, where θ < 90°.

4. The air conditioner according to claim 3, characterized in that, θ≤30°.

5. The air conditioner according to claim 1, characterized in that, The jet channel is formed as a circular hole, an elliptical hole, a polygonal hole, or an elongated hole extending along the axial direction of the impeller.

6. The air conditioner according to claim 1, characterized in that, All the jet channels are divided into a group of jet channels or multiple groups of jet channels arranged at intervals along the extension direction of the duct profile. Each group of jet channels includes one jet channel or multiple jet channels arranged at intervals along the axial direction of the impeller. The cross section obtained by cutting the duct volute with a plane perpendicular to the axial direction of the impeller is the volute cross section. The contour line of the volute cross section facing the duct side constitutes the duct profile.

7. The air conditioner according to claim 6, characterized in that, The number of jet channel groups is N, where N≤3.

8. The air conditioner according to claim 6, characterized in that, In the extension direction of the air duct profile, the distance between two adjacent groups of jet channels is d, and the width of the jet channel is D2, where D2 < d.

9. The air conditioner according to claim 6, characterized in that, The sum of the lengths of all jet channels in a single jet channel group is Li, and the length of the air duct in the axial direction of the wind turbine is Ls, where 0.5*Ls≤Li≤0.95*Ls. The length of the jet channel refers to the dimension of the jet channel in the axial direction of the wind turbine.

10. The air conditioner according to any one of claims 1-9, characterized in that, The wind turbine is oriented axially in the left-right direction, the air outlet is formed at the lower front part of the housing assembly, and the air inlet is formed at the top of the housing assembly.

11. The air conditioner according to claim 10, characterized in that, The housing assembly includes a chassis component connected to the air duct volute and together with the air inlet end of the air duct volute, defines a water receiving groove. The bottom of the heat exchanger assembly is located inside the water receiving groove. The wall surface of the air inlet end facing the water receiving groove is a first wall surface. The jet channel penetrates the first wall surface to form a channel opening. The lowest position of the channel opening is higher than the bottom wall of the water receiving groove.

12. The air conditioner according to claim 11, characterized in that, The distance between the lowest point of the outer opening of the channel at its lowest position and the bottom wall of the water receiving tank is D1, where D1 ≥ 15 mm.

13. The air conditioner according to claim 10, characterized in that, The air duct volute includes a front volute and a rear volute, the front volute is connected to the front side of the rear volute, and the jet channel is located at the air inlet end of the rear volute.

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