Single-motor hybrid air duct noise reduction mobile air conditioner

Abstract

The application relates to the technical field of mobile air conditioners, and particularly discloses a single-motor hybrid air duct noise reduction mobile air conditioner. The mobile air conditioner comprises an air conditioner body, wherein a partition base is arranged in the middle of the air conditioner body and divides the air conditioner body into an upper cavity and a lower cavity; a cross-flow air duct assembly and an evaporator assembly are arranged in the upper cavity, and the two assemblies enclose an upper cross-flow air duct in the horizontal direction; a condenser assembly is arranged in the lower cavity, and the condenser assembly, the partition base and the air conditioner body enclose a lower centrifugal air duct which changes the horizontal air flow into vertical flow; a motor assembly is arranged in the partition base, and the motor assembly forms a first output end and a second output end in the vertical direction, and drives a first fan wheel assembly in the upper cross-flow air duct and a second fan wheel assembly in the lower centrifugal air duct, respectively. The application realizes physical isolation of the upper cavity and the lower cavity and differential configuration of the cross-flow fan wheel and the centrifugal fan wheel, thereby greatly reducing the operation noise of the whole machine while retaining the single-motor simplified structure and strong refrigeration performance.

Description

Technical Field

[0001] This invention relates to the field of portable air conditioning technology, specifically to a single-motor hybrid air duct noise reduction portable air conditioner. Background Technology

[0002] Most conventional single-motor driven portable air conditioners on the market use a centrifugal impeller air delivery structure for both the top and bottom air outlets. The centrifugal impeller relies on high-speed rotation to radially throw out airflow, which has the characteristics of strong air volume, large air pressure impact force, and fast indoor air circulation rate, and can quickly realize the exchange of hot and cold air to meet the basic usage requirements of rapid cooling of the equipment.

[0003] However, this all-centrifugal impeller and single-motor-driven air supply structure has inherent structural defects. During operation, the upper and lower centrifugal impellers rotate synchronously at high speed, with the blades continuously cutting the air at high speed. The airflow experiences high-frequency impacts, friction, and compression against the inner wall of the volute, easily generating significant high-pressure turbulence, eddy currents, and periodic airflow pulsations within the air duct. This results in noticeable high-frequency wind noise, sharp whistling, and turbulent airflow noise. The aerodynamic noise generated by the synchronous operation of the upper and lower centrifugal impellers, combined with structural resonance noise, leads to persistently high overall operating noise levels.

[0004] Traditional centrifugal structure designs prioritize high air volume and strong air pressure output. The more powerful the air volume output, the more severe the wind noise and resonance noise. This structural contradiction creates a technical problem where air volume and noise are incompatible. Either air volume is reduced to achieve quietness, or quietness is sacrificed for forced cooling, which greatly limits the applicability of the equipment in scenarios with high noise requirements, such as bedrooms, studies, and offices.

[0005] In view of this, there is an urgent need for a portable air conditioner solution that can effectively reduce the overall operating noise while retaining the simplified structure of a single motor and strong cooling performance. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a single-motor hybrid air duct noise reduction portable air conditioner, which can significantly reduce the overall operating noise while retaining the single-motor drive structure and strong cooling performance.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: This invention provides a single-motor hybrid air duct noise reduction portable air conditioner, comprising: An air conditioner body, wherein a partition base is provided in the middle of the air conditioner body, and the air conditioner body is divided into a separate upper cavity and a lower cavity; A cross-flow duct assembly and an evaporator assembly are disposed in the upper cavity and fixedly connected to the partition base, and the cross-flow duct assembly and the evaporator assembly are arranged to form an upper cross-flow duct in which the airflow flows in the horizontal direction. A condenser assembly is disposed in the lower cavity and fixedly connected to the partition base, and the condenser assembly, the partition base and the air conditioner body enclose and form a lower centrifugal air duct that changes the airflow direction from horizontal to vertical. The partition base includes a motor assembly, a first impeller assembly in the upper cross-flow duct, and a second impeller assembly in the lower centrifugal duct. The motor assembly forms a first output end and a second output end in the vertical direction. The first output end drives the first impeller assembly to rotate and causes the air in the upper cross-flow duct to flow horizontally. The second output end drives the second impeller assembly to rotate and causes the horizontally entering air in the lower centrifugal duct to flow vertically.

[0008] The beneficial effects of this invention are: First, the air conditioner unit is divided into an independent upper and lower cavity by a partition base, completely isolating the upper cross-flow duct from the lower centrifugal duct in physical space. This ensures a smooth and regular airflow path when the cross-flow fan delivers air horizontally in the upper cavity, eliminating high-speed radial slinging, violent airflow impacts, and high-pressure eddies. This fundamentally eliminates the high-frequency whistling, turbulence noise, and airflow pulsation noise inherent in centrifugal fans. Simultaneously, the centrifugal fan in the lower cavity operates independently, and its aerodynamic noise is effectively blocked by the partition base, preventing it from superimposing and resonating with the noise source in the upper cavity. This completely eliminates the noise superposition effect of traditional dual centrifugal fan synchronous operation, significantly reducing the overall operating noise of the unit.

[0009] Secondly, the upper cross-flow duct, enclosed by the cross-flow duct assembly and the evaporator assembly, forms a horizontal airflow channel. This allows air, after heat exchange in the evaporator, to be directly delivered horizontally to the cross-flow fan via the shortest path, eliminating wind resistance losses and airflow turbulence caused by unnecessary bends and deflections. Furthermore, the cross-flow fan exhibits low horizontal airflow resistance and smooth operation, further reducing airflow turbulence noise. Simultaneously, the lower centrifugal duct, enclosed by the condenser assembly, partition base, and air conditioning unit, forms a turning channel that transforms the airflow from horizontal to vertical. This allows air entering the lower cavity horizontally to smoothly transition to vertical flow after heat exchange in the condenser, under the suction of the centrifugal fan, achieving airflow redirection without the need for additional guide components. This fully utilizes the wind pressure advantage of the radial airflow from the centrifugal fan, ensuring that the unit's powerful airflow capacity and core cooling efficiency are not compromised by the noise reduction design.

[0010] Third, the motor assembly is fixedly mounted on the partition base, forming a first output end and a second output end in the vertical direction. Specifically, the first output end drives the first impeller assembly in the upper cavity to rotate, and the second output end drives the second impeller assembly in the lower cavity to rotate. A single motor drives the impeller assemblies in the two independent cavities simultaneously, eliminating the need for additional drive motors and their supporting transmission mechanisms. This achieves differentiated impeller configurations and physical space isolation for noise reduction while retaining the cost-effectiveness advantages of a single-motor portable air conditioner, such as simplified structure, low failure rate, convenient assembly, and controllable mass production costs.

[0011] In summary, this invention achieves physical isolation between the upper and lower cavities through a partition base, independently encloses the cross-flow air duct and centrifugal air duct to form their own airflow paths, and uses a single motor with dual outputs to drive the upper and lower impellers respectively. This significantly reduces operating noise while fully preserving the original high-volume cooling performance of the equipment, thus solving the technical problem of the incompatibility between air volume and noise in traditional single-motor portable air conditioners, where "the stronger the air volume, the louder the noise." Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the exploded structure of the present invention; Figure 4 For the present invention Figure 1 Schematic diagram of the structure of the mid-section AA; Figure 5 This is a schematic diagram of the structure of the partition base, evaporator assembly, cooler assembly and first impeller assembly in this invention; Figure 6 This is a schematic diagram of the structure of the cross-flow impeller, centrifugal impeller, and partition base in this invention; Figure 7 This is a schematic diagram of the cross-flow wind turbine in this invention; Figure 8 This is a schematic diagram of the centrifugal impeller in this invention.

[0014] The attached diagram lists the components represented by each number as follows: 10. Air conditioner body; 11. Upper cavity; 111. Evaporator assembly; 112. Upper cross-flow air duct; 12. Lower cavity; 121. Lower centrifugal air duct; 13. First impeller assembly; 131. Cross-flow impeller; 1311. Columnar fan blade body; 1312. Cross-flow locking hole; 1313. Rotating support rod; 1314. Upper connecting circular plate; 1315. Lower connecting circular plate; 1316. Cross-flow arc-shaped plate blade; 1317. Cross-flow circular reinforcing ring; 132. Rotating support component; 14. Second impeller assembly; 141. Centrifugal impeller; 1411. Circular impeller base; 1412. 1413. Centrifugal circular reinforcing ring; 1414. Rotating arc plate; 1415. Rotating connecting cylinder; 1416. Transmission reinforcing rib; 15. Cross-flow duct cover; 16. Centrifugal air inlet; 17. Cross-flow air inlet; 18. Cross-flow air outlet; 20. Partition base; 21. Motor assembly; 211. First output end; 212. Second output end; 22. Upper duct base; 23. Lower duct base; 231. Motor mounting cavity; 232. Centrifugal air outlet; 30. Cross-flow duct assembly; 40. Condenser assembly; 41. Compressor assembly; 50. Water pumping assembly. Detailed Implementation

[0015] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0016] refer to Figure 1-8This invention provides a single-motor hybrid air duct noise reduction portable air conditioner, including an air conditioner body 10. A partition base 20 is provided in the middle of the air conditioner body 10, forming a separate upper cavity 11 and lower cavity 12. A cross-flow air duct assembly 30 and an evaporator assembly 111 are disposed in the upper cavity 11 and fixedly connected to the partition base 20, respectively. The cross-flow air duct assembly 30 and the evaporator assembly 111 enclose and form an upper cross-flow air duct 112 where airflow flows horizontally. A condenser assembly 40 is disposed in the lower cavity 12 and fixedly connected to the partition base 20. The condenser assembly 40, the partition base 20, and the air conditioner body are all connected together. The body 10 encloses and forms a lower centrifugal air duct 121 that changes the airflow direction from horizontal to vertical. A motor assembly 21, a first impeller assembly 13, and a second impeller assembly 14 are provided in the upper through-flow air duct 112 and the lower centrifugal air duct 121, respectively. The motor assembly 21 forms a first output end 211 and a second output end 212 in the vertical direction. The first output end 211 drives the first impeller assembly 13 to rotate and causes the air in the upper through-flow air duct 112 to flow horizontally. The second output end 212 drives the second impeller assembly 14 to rotate and causes the horizontally entering air in the lower centrifugal air duct 121 to flow vertically.

[0017] In this embodiment, reference Figure 2-5 The core structure of the single-motor hybrid air duct noise reduction portable air conditioner lies in the partition base 20, which divides the interior of the air conditioner body 10 into two completely independent upper cavities 11 and lower cavities 12 in the vertical direction. The partition base 20, as the core structural support of the entire air conditioner body 10, is horizontally positioned in the middle of the body, clearly dividing the internal space into the upper cavity 11 and the lower cavity 12. The upper and lower cavities 12 are completely isolated in physical space, thus forming a natural barrier in the acoustic propagation path. Aerodynamic noise in the upper cavity 11 cannot directly propagate downwards to the lower cavity 12, and vibration noise in the lower cavity 12 cannot directly propagate upwards to the upper cavity 11; the power connection is only achieved through the subsequent motor assembly 21.

[0018] Specifically, within the upper cavity 11, the cross-flow duct assembly 30 and the evaporator assembly 111 are respectively fixedly installed on the upper surface of the partition base 20. The cross-flow duct assembly 30 and the evaporator assembly 111 are arranged opposite to each other and together enclose each other, forming an upper cross-flow duct 112 for airflow to flow radially in the horizontal direction. The evaporator assembly 111 is located on the side near the rear air inlet of the air conditioner body 10, while the cross-flow duct assembly 30 is located on the side near the front air outlet. The air entering from the air inlet first flows through the evaporator assembly 111 for heat exchange, and the heat-exchanged air then enters the upper cross-flow duct 112 formed by the two in a horizontal direction. Since the upper cross-flow duct 112 is horizontal, the airflow path is short and straight, without unnecessary bends and changes in direction that cause wind resistance loss and airflow turbulence, thereby further reducing airflow turbulence noise.

[0019] Preferably, the air conditioner body 10 has a cross-flow air inlet 17 on the first side and the second side of the upper cavity 11, and a cross-flow air outlet 18 on the fourth side. The cross-flow air inlet 17 is correspondingly arranged with the evaporator assembly 111, and both the cross-flow air outlet 18 and the cross-flow air inlet 17 are connected to the upper cross-flow air duct 112.

[0020] Within the lower cavity 12, a base is located below the air conditioner body 10. The upper end of the condenser assembly 40 is fixedly connected to the lower air duct base 23, and the lower end is also fixedly connected to the base. The condenser assembly 40, the lower end face of the partition base 20, and the inner wall of the lower part of the air conditioner body 10 together form a lower centrifugal air duct 121. Specifically, the upper air duct base 22 and the lower air duct base 23 are provided with centrifugal air outlets 232, and a transverse air duct communicating with the centrifugal air outlets 232 is provided between them. A vertical air duct hole communicating with the lower cavity 12 is also opened in the middle of the lower air duct base 23, allowing the transverse air duct to connect with the lower cavity 12. The condenser assembly 40 is located in the lower cavity 12, and the portion of the air conditioner body 10 within the lower cavity 12 encloses the condenser assembly 40 to form a vertical air duct that communicates with the horizontal air duct. Additionally, a centrifugal air inlet 16 is horizontally provided on the air conditioner body 10 corresponding to the condenser assembly 40, connecting the centrifugal air inlet 16 to the vertical air duct. Combined with the connection between the horizontal air duct and the centrifugal air outlet 232, the horizontal and vertical air ducts constitute a lower centrifugal air duct 121. The special feature of this lower centrifugal air duct 121 is that its air inlet direction is horizontal. Under the action of the centrifugal impeller 141, the horizontally entering air rises vertically and is then discharged horizontally. Specifically, the air inlet of the lower cavity 12 is located at the rear of the air conditioner body 10, allowing external air to enter the lower cavity 12 horizontally and flow through the condenser assembly 40 for heat exchange. Under the suction action of the centrifugal impeller 141, the heat-exchanged air enters the vertical duct from the horizontal direction, and is then drawn into the centrifugal impeller 141 from the vertical direction. After being accelerated by the centrifugal impeller 141, it is thrown out radially (i.e., horizontally) from the outer edge of the centrifugal impeller 141. However, since the lower centrifugal duct 121 is formed by the condenser assembly 40, the partition base 20 and the air conditioner body 10, the lower centrifugal duct 121 mainly utilizes the cross-flow impeller 131 set in the upper horizontal duct. The cross-flow impeller 131 rotates to make the air in the horizontal duct flow radially and be discharged from the centrifugal air outlet 232, forming a negative pressure space in the horizontal duct. This causes the air in the lower vertical duct to flow vertically upward, changing the horizontal flow from the centrifugal air inlet 16 to the bottom of the vertical duct to flow vertically. This airflow redirection method, which can be achieved without additional guide components, ensures that the wind pressure advantage of the radial airflow of the centrifugal impeller 141 is fully utilized, while avoiding the increase in wind resistance and additional airflow noise caused by additional guide components.

[0021] More specifically, the motor assembly 21 is disposed inside the partition base 20. The partition base 20 has a mounting cavity for accommodating the motor assembly 21. The motor assembly 21 is arranged vertically, with its motor shaft extending vertically to form an upwardly extending first output end 211 and a downwardly extending second output end 212. The first output end 211 extends upward into the upper cavity 11 and is drivenly connected to a first impeller assembly 13 (i.e., cross-flow impeller 131) disposed in the upper cross-flow duct 112. The second output end 212 extends downward into the lower cavity 12 and is drivenly connected to a second impeller assembly 14 (i.e., centrifugal impeller 141) disposed in the lower centrifugal duct 121.

[0022] It needs to be explained that when the motor assembly 21 is powered on, the first output terminal 211 drives the cross-flow fan 131 to rotate around its vertical axis. As the cross-flow fan 131 rotates, its blades cause the air in the upper cross-flow duct 112 to flow horizontally. Air that has undergone heat exchange in the evaporator is drawn in by the cross-flow fan 131 and discharged horizontally from the upper air outlet at the front of the air conditioner unit 10, achieving upper air supply. Simultaneously, the second output terminal 212 drives the centrifugal fan 141 to rotate around its vertical axis. As the centrifugal fan 141 rotates, its blades cause the horizontally entering air in the lower centrifugal duct 121 to flow vertically. Air that enters horizontally from the rear of the air conditioner body 10 into the lower cavity 12 and flows through the condenser for heat exchange is drawn in axially by the centrifugal impeller 141, accelerated by centrifugal force, and then thrown out radially. Guided by the lower centrifugal air duct 121, it changes to flow vertically and is finally discharged from the lower air outlet located at the front or side of the air conditioner body 10, thus achieving lower air supply.

[0023] This invention enables a single motor to simultaneously drive different impellers in two independent cavities, completing the air supply to the entire air conditioning unit 10. The smooth airflow and absence of high-frequency cutting noise during the operation of the cross-flow impeller 131 fundamentally eliminates the high-frequency whistling and turbulent noise generated by the traditional centrifugal impeller 141 at the upper air outlet. The partition base 20 physically isolates the upper and lower cavities 12, effectively blocking the noise generated by the centrifugal impeller 141 in the lower cavity 12, preventing it from overlapping and resonating with the noise source in the upper cavity 11. The lower centrifugal duct 121 utilizes the wind pressure advantage of the centrifugal impeller 141 to ensure the unit's strong air delivery capacity. Therefore, this solution significantly reduces operating noise while fully preserving the original high-volume cooling performance of the equipment, solving the technical problem of incompatibility between airflow and noise in traditional solutions.

[0024] Preferred, Reference Figure 3-6The partition base 20 includes an upper air duct base 22 and a lower air duct base 23, the upper air duct base 22 and the lower air duct base 23 are fixedly connected; a motor mounting cavity 231 for mounting the motor assembly 21 is formed between the partition base 20 and the cross-flow air duct assembly 30, and the motor assembly 21 is disposed through the upper air duct base 22, the first output end 211 is rotatably disposed through the cross-flow air duct assembly 30, and the second output end 212 is rotatably disposed through the lower air duct base 23.

[0025] In this embodiment, the partition base 20 is not a single integral component, but rather consists of two parts: an upper air duct base 22 and a lower air duct base 23. Both the upper air duct base 22 and the lower air duct base 23 can be manufactured using materials with sufficient structural strength through injection molding or stamping processes. The upper end face of the upper air duct base 22 is used to fix and install the cross-flow air duct assembly 30 and the evaporator assembly 111, while its lower end face is opposite to the upper end face of the lower air duct base 23. The upper air duct base 22 and the lower air duct base 23 are fixedly connected by bolts, clips, or welding.

[0026] A motor mounting cavity 231 for mounting the motor assembly 21 is formed between the partition base 20 and the cross-flow duct assembly 30. Specifically, the motor mounting cavity 231 is formed by the recessed area in the middle of the upper end face of the upper duct base 22 and the lower end face of the cross-flow duct assembly 30. The motor assembly 21 is housed in the motor mounting cavity 231 and passes through the upper duct base 22, that is, the body of the motor assembly 21 passes through the through hole on the upper duct base 22 and is fixed therein. The first output end 211 extends from the upper end face of the upper duct base 22, rotatably passes through a part of the structure of the cross-flow duct assembly 30, and extends into the upper cavity 11 to connect with the cross-flow impeller 131. The second output end 212 extends from the lower end face of the lower duct base 23, rotatably passes through the through hole on the lower duct base 23, and extends into the lower cavity 12 to connect with the centrifugal impeller 141.

[0027] It should be added that the motor assembly 21 is completely encapsulated within the motor mounting cavity 231 formed by the upper air duct base 22, the lower air duct base 23, and the cross-flow air duct assembly 30. On the one hand, the mechanical vibration and electromagnetic noise generated during motor operation are effectively absorbed and blocked by the multi-layer base structure, preventing them from propagating upwards to the cross-flow air duct or downwards to the centrifugal air duct. This avoids structural resonance between the motor's own vibration and the aerodynamic noise of the upper and lower impellers, further reducing the overall operating noise of the machine. On the other hand, the sealed mounting cavity also serves to prevent dust and moisture, improving the service life and operational reliability of the motor assembly 21.

[0028] The present invention uses an upper air duct base 22 and a lower air duct base 23 to be fixedly connected. A sealed motor mounting cavity 231 is formed between the partition base 20 and the cross-flow air duct assembly 30. The motor assembly 21 is completely contained in the motor mounting cavity 231. The multi-layer base structure physically isolates the motor from the upper cavity 11 and the lower cavity 12, so that the mechanical vibration and electromagnetic noise generated when the motor is running are effectively absorbed and blocked, and cannot be transmitted upward to the cross-flow air duct or downward to the centrifugal air duct. This avoids the structural resonance between the motor's own vibration and the aerodynamic noise of the upper and lower impellers, and further reduces the overall operating noise of the machine.

[0029] Preferred, Reference Figure 3-6 The first impeller assembly 13 includes a cross-flow impeller 131 disposed on the upper cross-flow duct 112, the lower end of the cross-flow impeller 131 being fixedly connected to the first output end 211; the cross-flow duct assembly 30 includes a cross-flow duct cover plate 15, and the first impeller assembly 13 also includes a rotating support member 132 disposed above the cross-flow duct cover plate 15, the upper end of the cross-flow impeller 131 being rotatably passed through the cross-flow duct cover plate 15 and rotatably connected to the rotating support member 132.

[0030] In this embodiment, the first impeller assembly 13 includes a cross-flow impeller 131 disposed within the upper cross-flow duct 112, and both ends of the cross-flow impeller 131 are rotatably connected to the cross-flow duct assembly 30. The cross-flow impeller 131 has a cylindrical structure, and its lower end is fixedly connected to the first output end 211 of the motor assembly 21. Specifically, a connection hole matching the shape of the first output end 211 is provided at the center of the lower end of the cross-flow impeller 131. The first output end 211 is inserted into the connection hole and fixedly connected by means of key connection, spline connection, or screw fastening, ensuring that the rotational power of the first output end 211 can be fully transmitted to the cross-flow impeller 131.

[0031] The cross-flow duct assembly 30 includes a cross-flow duct cover plate 15. The cross-flow duct cover plate 15 closes the top of the upper cross-flow duct 112, creating a relatively enclosed duct environment. A through hole is provided at the center of the cross-flow duct cover plate 15 for the upper end of the cross-flow impeller 131 to pass through. The first impeller assembly 13 also includes a rotating support member 132, which is fixedly mounted on the upper end face of the cross-flow duct cover plate 15. The upper end of the cross-flow impeller 131 rotatably passes through the through hole in the cross-flow duct cover plate 15 and is rotatably connected to the rotating support member 132.

[0032] Preferably, the rotating support 132 can be a bearing housing or an oil-impregnated bearing structure, with a rolling bearing or a sliding bearing inside, and the upper end of the cross-flow fan 131 is inserted into the inner ring of the bearing to achieve a rotatable connection.

[0033] It should be added that, through the "lower-end drive, upper-end support" two-end constraint structure, the cross-flow wind turbine 131 is positioned and constrained at both ends during high-speed rotation. Compared with the traditional single-end cantilever support method, the two-end constraint structure effectively limits the radial sway and axial movement of the cross-flow wind turbine 131, avoids eccentric vibration caused by rotational imbalance, significantly reduces structural vibration noise caused by mechanical rotational imbalance, and improves the smoothness of operation and service life of the cross-flow wind turbine 131.

[0034] The present invention obtains driving force by fixing the lower end of the cross-flow fan 131 to the first output end 211, and the upper end passes through the cross-flow duct cover plate 15 and is rotatably connected to the rotating support member 132. The cross-flow fan 131 forms a two-end constraint structure of "lower end driving and upper end supporting" in the vertical direction, so that the upper and lower ends of the cross-flow fan 131 are positioned and constrained when rotating at high speed, and cannot produce radial sway and axial movement. This avoids the rotational imbalance and eccentric vibration caused by the single-end cantilever support of the cross-flow fan 131, and greatly reduces the structural vibration noise caused by mechanical rotational imbalance.

[0035] Preferred, Reference Figure 7 The cross-flow fan wheel 131 includes a columnar fan blade body 1311. The lower end of the columnar fan blade body 1311 is provided with a cross-flow locking hole 1312 that is fixedly connected to the first output end 211. The upper end of the columnar fan blade body 1311 is provided with a rotating support rod 1313 that is rotatably connected to the rotating support member 132.

[0036] In this embodiment, the main structure of the cross-flow impeller 131 is a columnar fan blade body 1311. The columnar fan blade body 1311 is generally a hollow cylindrical shape, composed of multiple blades and connecting circular plates. A cross-flow locking hole 1312 is provided at the lower end of the columnar fan blade body 1311. The cross-sectional shape of the cross-flow locking hole 1312 matches the cross-sectional shape of the first output end 211, for example, both are D-shaped or rectangular cross-sections, thereby achieving a locking and fixed connection. After the first output end 211 is inserted into the cross-flow locking hole 1312, the rotational power is transmitted through the locking engagement, ensuring no relative sliding.

[0037] A rotating support rod 1313 is provided at the upper end of the columnar fan blade body 1311. The rotating support rod 1313 extends vertically upward, and its axis coincides with the axis of the columnar fan blade body 1311. The outer diameter of the rotating support rod 1313 matches the inner diameter of the rotating support member 132, and the rotating support rod 1313 is inserted into the rotating support member 132 to achieve a rotatable connection.

[0038] It should be added that, through the optimized transmission structure of "rigid drive at the lower end and low-resistance support at the upper end", the rotational power of the first output end 211 is efficiently transmitted to the columnar fan blade body 1311 through the locking connection, while the upper end minimizes the rotational resistance through the cooperation of the rotating support rod 1313 and the bearing. This structure not only ensures the efficiency of power transmission, but also reduces frictional noise and mechanical wear at the upper support, further reducing the overall operating noise of the machine.

[0039] This invention features a flow-through locking hole 1312 at the lower end of the columnar fan blade body 1311, which is fixedly connected to the first output end 211. A rotating support rod 1313 at the upper end is rotatably connected to the rotating support member 132. The fixed connection ensures that the rotational power of the first output end 211 can be completely transmitted to the columnar fan blade body 1311 without relative sliding. The cooperation between the rotating support rod 1313 and the rotating support member 132 minimizes the rotational resistance at the upper end. This achieves an optimized transmission structure of "rigid drive at the lower end and low-resistance support at the upper end," which not only ensures power transmission efficiency but also reduces frictional noise and mechanical wear at the upper support.

[0040] Preferred, Reference Figure 7 The columnar fan blade body 1311 includes an upper connecting circular plate 1314 and a lower connecting circular plate 1315 arranged around the same axis and in the vertical direction. A plurality of through-flow arc plate blades 1316 are equally spaced along the circumference of the upper connecting circular plate 1314 and the lower connecting circular plate 1315. The angle between the line connecting the two sides of the through-flow arc plate blade 1316 and the extended radius of the upper connecting circular plate 1314 and the lower connecting circular plate 1315 forms an acute angle.

[0041] In this embodiment, the columnar fan blade body 1311 includes an upper connecting circular plate 1314 and a lower connecting circular plate 1315. Both the upper connecting circular plate 1314 and the lower connecting circular plate 1315 are annular plate structures, and they are spaced apart vertically along the same vertical axis, jointly defining the overall outline of the columnar fan blade body 1311. The outer diameter and inner diameter of the upper connecting circular plate 1314 and the lower connecting circular plate 1315 are equal, forming a space between them for accommodating the blades.

[0042] A plurality of cross-flow arc-shaped plate blades 1316 are evenly spaced along the circumference of the upper connecting circular plate 1314 and the lower connecting circular plate 1315. Each cross-flow arc-shaped plate blade 1316 is an arc-shaped plate structure, and its upper and lower sides are fixedly connected to the upper connecting circular plate 1314 and the lower connecting circular plate 1315 respectively, which can be achieved by means such as integral injection molding or welding. All cross-flow arc-shaped plate blades 1316 are evenly distributed around the same axis to form a cylindrical impeller structure.

[0043] The key feature of the cross-flow curved plate blade 1316 lies in its installation angle. Specifically, the line connecting the two sides of the cross-flow curved plate blade 1316, i.e., the line connecting the leading and trailing edges of the blade, forms an acute angle with the extended radius of the upper connecting circular plate 1314 or the lower connecting circular plate 1315. In other words, the cross-flow curved plate blade 1316 is not arranged in the radial direction (i.e., the radial direction), but is tilted backward at a certain angle relative to the radial direction (i.e., in the opposite direction of rotation), forming a backward-tilted blade structure.

[0044] It should be explained that when the cross-flow impeller 131 rotates, the airflow flows smoothly along the backward tilt direction of the blades 1316 due to their backward-tilted arrangement. Compared to radial straight blades, the backward-tilted blades have a gentler cutting angle for the airflow, significantly reducing the impact force between the airflow and the blade surface. This significantly reduces high-frequency wind noise and turbulence noise generated when the blades rotate at high speed; furthermore, the backward-tilted blade structure guides the airflow through the duct in a smoother, streamlined path, further reducing airflow separation and eddy current losses, and improving air delivery efficiency.

[0045] This invention utilizes the acute angle formed by the line connecting the two sides of the cross-flow arc-shaped blade 1316 and the extended radius of the connecting circular plate, meaning that the cross-flow arc-shaped blade 1316 is tilted backward relative to the radial direction. When the cross-flow impeller 131 rotates, the airflow flows smoothly along the backward tilting direction of the cross-flow arc-shaped blade 1316. The cutting angle of the cross-flow arc-shaped blade 1316 on the airflow is gentler, and the impact force between the airflow and the surface of the cross-flow arc-shaped blade 1316 is greatly reduced. This significantly reduces the high-frequency wind noise and turbulence noise generated when the cross-flow arc-shaped blade 1316 cuts the air at high speed. At the same time, the backward tilting blade structure can also guide the airflow through the duct in a smoother streamlined path, further reducing airflow separation and eddy current losses, and improving air delivery efficiency.

[0046] Preferred, Reference Figure 7 A plurality of through-flow circular reinforcing rings 1317 are provided between the upper connecting circular plate 1314 and the lower connecting circular plate 1315. A plurality of through-flow arc plate blades 1316 are arranged perpendicularly through the plurality of through-flow circular reinforcing rings 1317. The through-flow circular reinforcing rings 1317 are used to improve the toughness of the middle section of the plurality of through-flow arc plate blades 1316.

[0047] In this embodiment, a plurality of through-flow circular reinforcing rings 1317 are further provided between the upper connecting circular plate 1314 and the lower connecting circular plate 1315. The through-flow circular reinforcing rings 1317 are annular plate structures, and their outer diameters are consistent with the outer diameters of the upper connecting circular plate 1314 and the lower connecting circular plate 1315. The plurality of through-flow circular reinforcing rings 1317 are arranged vertically at intervals between the upper connecting circular plate 1314 and the lower connecting circular plate 1315, with each ring located in the same horizontal plane.

[0048] All the cross-flow curved plate blades 1316 are perpendicularly inserted through several cross-flow circular reinforcing rings 1317. Specifically, the cross-flow circular reinforcing rings 1317 have perforations that match the cross-sectional shape of the cross-flow curved plate blades 1316. The cross-flow curved plate blades 1316 pass through these perforations and are fixedly connected to the reinforcing rings. The fixing connection can be achieved through integral injection molding or welding. The function of the cross-flow circular reinforcing rings 1317 is to improve the toughness of the middle section of the cross-flow curved plate blades 1316.

[0049] It needs to be explained that by connecting and fixing the middle sections of each cross-flow curved plate blade 1316 in series through the cross-flow circular reinforcing ring 1317, all cross-flow curved plate blades 1316 cannot generate independent radial deformation and oscillation during rotation, resulting in a significant increase in overall stiffness. This effectively avoids dynamic balance disruption and irregular vibration noise caused by deformation of the cross-flow curved plate blades 1316 due to centrifugal force during high-speed rotation. At the same time, the improved toughness of the middle section also prevents the cross-flow curved plate blades 1316 from developing microcracks or even fractures due to fatigue during long-term operation, thereby improving the structural strength and long-term operational reliability of the cross-flow wind turbine 131.

[0050] The cross-flow circular reinforcing ring 1317 of the present invention vertically passes through the middle section of several cross-flow arc plate blades 1316. The middle sections of all cross-flow arc plate blades 1316 are fixed in series by the cross-flow circular reinforcing ring 1317, so that each cross-flow arc plate blade 1316 cannot generate independent radial deformation and oscillation during rotation, and the overall stiffness is greatly improved. This avoids the dynamic balance failure and irregular vibration noise caused by the deformation of the cross-flow arc plate blades 1316 due to centrifugal force when rotating at high speed. At the same time, the improved toughness of the middle section also prevents the cross-flow arc plate blades 1316 from generating microcracks or even fractures due to fatigue during long-term operation, thereby improving the structural strength and long-term operational reliability of the cross-flow impeller 131.

[0051] Preferred, Reference Figure 8The second impeller assembly 14 includes a centrifugal impeller 141 disposed between the upper air duct base 22 and the lower air duct base 23. The centrifugal impeller 141 includes a circular impeller base 1411 connected to the second output end 212. The circular impeller base 1411 extends downward in the vertical direction to form a plurality of centrifugal arc-shaped plate blades 1412. The lower outer side of the plurality of centrifugal arc-shaped plate blades 1412 is provided with a centrifugal circular reinforcing ring 1413 for fixing the blade strength.

[0052] In this embodiment, the second impeller assembly 14 includes a centrifugal impeller 141 disposed within the lower centrifugal duct 121. The centrifugal impeller 141 has an overall bowl-shaped or disc-shaped structure and includes a circular impeller base 1411. The circular impeller base 1411 has a disc-shaped structure, and its center position is fixedly connected to the second output end 212 of the motor assembly 21.

[0053] A plurality of centrifugal arc-shaped blades 1412 extend vertically downward from the periphery (i.e., outer edge) of the circular impeller base 1411. These centrifugal arc-shaped blades 1412 are evenly spaced around the circumference of the circular impeller base 1411, with each blade extending downward from the outer edge of the base, forming an overall cage-like or open impeller structure. The arc-shaped curvature of the centrifugal arc-shaped blades 1412 matches the rotation direction of the centrifugal impeller 141, enabling efficient capture and ejection of air.

[0054] A centrifugal circular reinforcing ring 1413 is provided on the lower outer side (i.e., the lower edge of the blade) of several centrifugal arc-shaped plate blades 1412. The centrifugal circular reinforcing ring 1413 is a ring structure that connects and fixes the lower ends of all centrifugal arc-shaped plate blades 1412 together. The centrifugal circular reinforcing ring 1413 is used to fix the blade strength of the centrifugal arc-shaped plate blades 1412.

[0055] It should be explained that, through the above structure, the lower ends of all centrifugal arc-shaped blades 1412 are fixed in series by centrifugal circular reinforcing rings 1413. This ensures that when the centrifugal arc-shaped blades 1412 rotate at high speed, both the upper and lower ends are synchronously constrained by the circular impeller base 1411 and the centrifugal circular reinforcing rings 1413, preventing the blades from undergoing radial expansion deformation due to centrifugal force. This avoids dynamic balance disruption and additional vibration noise caused by blade deformation. Simultaneously, the centrifugal circular reinforcing rings 1413 also prevent the lower ends of the centrifugal arc-shaped blades 1412 from cracking due to stress concentration during long-term operation, improving the structural strength and long-term operational reliability of the centrifugal impeller 141 under high-speed, high-pressure conditions.

[0056] This invention forms centrifugal arc-shaped blades 1412 by extending downwards from the periphery of a circular impeller base 1411. A centrifugal circular reinforcing ring 1413 is provided on the outer side of the lower end of the centrifugal arc-shaped blades 1412. The lower ends of all centrifugal arc-shaped blades 1412 are fixed in series by the centrifugal circular reinforcing rings 1413. When the centrifugal arc-shaped blades 1412 rotate at high speed, the upper and lower ends are synchronously constrained by the circular impeller base 1411 and the centrifugal circular reinforcing rings 1413, respectively. The blades cannot undergo radial expansion deformation due to centrifugal force, thereby avoiding dynamic balance damage and additional vibration noise caused by blade deformation. At the same time, the centrifugal circular reinforcing rings 1413 also prevent the lower ends of the centrifugal arc-shaped blades 1412 from cracking due to stress concentration during long-term operation, thereby improving the structural strength and long-term operational reliability of the centrifugal impeller 141 under high speed and high wind pressure conditions.

[0057] Preferred, Reference Figure 8 The inner circumference of the circular wind turbine base 1411 extends to form a plurality of rotating arc plates 1414, and the plurality of rotating arc plates 1414 converge at the center of the circular wind turbine base 1411 to form a rotating connecting cylinder 1415, which is fixedly connected to the second output end 212.

[0058] In this embodiment, a plurality of rotating arc-shaped plates 1414 extend from the inner circumference of the circular wind turbine base 1411 (i.e., the side of the circular wind turbine base 1411 facing the center). The rotating arc-shaped plates 1414 are arc-shaped plate structures, and their number corresponds to the number of centrifugal arc-shaped plate blades 1412 or is other suitable numbers. The plurality of rotating arc-shaped plates 1414 extend from the inner edge of the circular wind turbine base 1411 toward the center and are evenly distributed along the circumference.

[0059] Several rotating arc-shaped plates 1414 converge at the center of the circular wind turbine base 1411, forming a rotating connecting cylinder 1415. The rotating connecting cylinder 1415 has a cylindrical structure, and its axis coincides with the axis of the circular wind turbine base 1411. The inner hole of the rotating connecting cylinder 1415 matches the shape of the second output end 212 of the motor assembly 21. The second output end 212 is inserted into the rotating connecting cylinder 1415 and fixedly connected by means of key connection, spline connection, or screw fastening.

[0060] As explained above, the rotating arc-shaped plates 1414 are evenly distributed along the circumference, connecting the rotating connecting cylinder 1415 to the circular impeller base 1411 as a single unit. The rotational power from the second output end 212 is transmitted to each rotating arc-shaped plate 1414 via the rotating connecting cylinder 1415, and then evenly distributed to the circular impeller base 1411 and the centrifugal arc-shaped plate blades 1412. This uniform radial transmission method from the center to the circumference avoids excessive local stress and uneven force distribution caused by concentrated power transmission, improves the stability of power transmission and the overall dynamic balance performance of the centrifugal impeller 141, and reduces vibration and noise caused by uneven power transmission.

[0061] This invention extends a rotating arc plate 1414 from the inner circumference of a circular wind turbine base 1411. These rotating arc plates 1414 converge at the center to form a rotating connecting cylinder 1415. The rotating arc plates 1414 are evenly distributed along the circumference, connecting the rotating connecting cylinder 1415 to the circular wind turbine base 1411 as a single unit. The rotational power from the second output end 212 is transmitted through the rotating connecting cylinder 1415 to each rotating arc plate 1414, and then evenly distributed to the circular wind turbine base 1411 and the centrifugal arc plate blades 1412. This achieves uniform radiation transmission of power from the center to the circumference, avoiding excessive local stress and uneven force distribution caused by concentrated power transmission. It improves the stability of power transmission and the overall dynamic balance performance of the centrifugal wind turbine 141, reducing vibration and noise caused by uneven power transmission.

[0062] Preferred, Reference Figure 8 The upper and lower end faces of the rotating arc plate 1414 are provided with transmission reinforcing ribs 1416. The transmission reinforcing ribs 1416 are fixedly connected to the side of the rotating connecting cylinder 1415. The transmission reinforcing ribs 1416 are used to improve the strength of the rotating arc plate 1414.

[0063] In this embodiment, both the upper and lower surfaces of the rotating arc-shaped plate 1414 are provided with transmission reinforcing ribs 1416. The transmission reinforcing ribs 1416 are strip-shaped or rib-shaped structures, and are arranged along the extending direction of the rotating arc-shaped plate 1414 (i.e., from the inner edge of the circular impeller base 1411 to the rotating connecting cylinder 1415). One end of the transmission reinforcing rib 1416 is fixedly connected to the surface of the rotating arc-shaped plate 1414, and the other end is fixedly connected to the side of the rotating connecting cylinder 1415.

[0064] The function of the transmission reinforcing rib 1416 is to improve the strength of the rotating arc plate 1414. By providing reinforcing ribs in both the upper and lower directions of the rotating arc plate 1414, the rotating arc plate 1414 will not twist or deform when subjected to the rotational torque transmitted from the rotating connecting cylinder 1415.

[0065] It should be explained that, through the above structure, the rotating arc plate 1414 is reinforced and supported by stiffeners in both the upper and lower directions, effectively improving its torsional stiffness. This ensures that there is no energy loss or transmission delay in the process of power being transmitted from the rotating connecting cylinder 1415 through the rotating arc plate 1414 to the circular wind turbine base 1411, avoiding unstable power output and additional vibration caused by deformation of the transmission components, and improving the long-term operational stability and reliability of the centrifugal wind turbine 141.

[0066] This invention provides transmission reinforcing ribs 1416 on both the upper and lower end faces of the rotating arc plate 1414, with the reinforcing ribs fixedly connected to the side of the rotating connecting cylinder 1415. The rotating arc plate 1414 is supported and reinforced by the reinforcing ribs in both the upper and lower directions, ensuring that the rotating arc plate 1414 will not twist or deform when subjected to the rotational torque transmitted from the rotating connecting cylinder 1415. This ensures that there is no energy loss or transmission delay in the process of power being transmitted from the rotating connecting cylinder 1415 to the circular wind turbine base 1411 via the rotating arc plate 1414, avoiding unstable power output and additional vibration caused by deformation of the transmission components, and improving the long-term operational stability and reliability of the centrifugal wind turbine 141.

[0067] Preferred, Reference Figure 2-5 The lower cavity 12 is equipped with a compressor assembly 41 and a water pumping assembly 50. The cooler assembly, the compressor assembly 41, and the water pumping assembly 50 are located below the centrifugal impeller 141. The air conditioner body 10 is provided with a centrifugal air inlet 16 arranged in a horizontal direction. The cooler assembly is arranged corresponding to the centrifugal air inlet 16, so that the air passing through the centrifugal air inlet 16 must flow through the cooler assembly before entering the lower centrifugal air duct 121. The upper air duct base 22 and the lower air duct base 23 are provided with centrifugal air outlets 232 arranged in a horizontal direction. The centrifugal air outlets 232 and the centrifugal impeller 141 are arranged at the same horizontal height, so that the centrifugal impeller 141 drives the air below it to rise vertically and then discharges horizontally through the centrifugal air outlets 232.

[0068] In this embodiment, a compressor assembly 41 and a water spraying assembly 50 are disposed within the lower cavity 12. Specifically, the compressor assembly 41 and the water spraying assembly 50 are located in the vertical air duct area. The compressor assembly 41 is disposed on one side of the bottom of the lower cavity 12 and is used to compress the refrigerant; the water spraying assembly 50 is disposed at the bottom of the lower cavity 12 and is used to disperse and spray condensate onto the condenser to improve heat exchange efficiency. The cooler assembly, compressor assembly 41, and water spraying assembly 50 are all located below the centrifugal impeller 141.

[0069] The air conditioner unit 10 is provided with a centrifugal air inlet 16 that opens horizontally. The centrifugal air inlet 16 is located at the rear or rear-side of the air conditioner unit 10, and its opening direction is horizontal, allowing outside air to enter the lower cavity 12 horizontally. The cooler assembly is correspondingly arranged to the centrifugal air inlet 16, that is, the cooler assembly is exactly located inside the centrifugal air inlet 16. The air entering from the centrifugal air inlet 16 must all flow through the cooler assembly and exchange heat with the cooler before it can continue to flow forward into the lower centrifugal air duct 121.

[0070] The partition base 20 has a centrifugal air outlet 232 arranged horizontally, and the centrifugal air outlet 232 is located above the centrifugal air inlet 16. The opening direction of the centrifugal air outlet 232 is horizontal. The centrifugal air outlet 232 and the centrifugal impeller 141 are set at the same horizontal height, that is, the centrifugal air outlet 232 is located on the partition base 20 at a position corresponding to the centrifugal impeller 141.

[0071] During operation, outside air enters the lower cavity 12 horizontally through the centrifugal air inlet 16. The air first flows through the cooler assembly for heat exchange, becoming hot air. Subsequently, under the suction of the centrifugal impeller 141, the heat-exchanged air is drawn vertically upwards into the centrifugal impeller 141 from below. After being accelerated by the centrifugal impeller 141, the air is radially ejected horizontally from the outer edge of the centrifugal impeller 141. Since the centrifugal air outlet 232 and the centrifugal impeller 141 are located at the same horizontal height, the ejected air is directly discharged horizontally through the centrifugal air outlet 232 to the outside of the air conditioning unit 10.

[0072] It needs to be explained that, through the above structure, the lower centrifugal duct 121 achieves a complete airflow path planning of "horizontal air intake, vertical rise, and horizontal air outlet." The airflow turns smoothly and unobstructed throughout the process, completing two 90° turns without the need for additional guide components. This ensures that the radial airflow pressure advantage of the centrifugal impeller 141 is fully utilized, while avoiding additional guide components that would increase wind resistance and generate additional airflow noise. This further controls operating noise while ensuring the overall unit's strong cooling performance.

[0073] The centrifugal air inlet 16 of this invention is arranged horizontally and corresponds to the cooler assembly, ensuring that all air entering the lower cavity 12 horizontally must flow through the cooler assembly before entering the lower centrifugal air duct 121. This ensures that all air entering the lower centrifugal air duct 121 has completed heat exchange with the cooler, improving heat exchange efficiency and cooling performance. At the same time, the centrifugal air outlet 232 is arranged horizontally on the partition base 20 at the same horizontal height as the centrifugal impeller 141. The centrifugal impeller 141 drives the air below it to rise vertically and then discharges horizontally through the centrifugal air outlet 232. This realizes a complete airflow path planning of "horizontal air inlet - vertical rise - horizontal air outlet" for the air in the lower centrifugal air duct 121. The airflow turns smoothly and without obstruction, and two 90° turns can be completed without additional guide components. This ensures that the wind pressure advantage of the radial wind of the centrifugal impeller 141 is fully utilized, while avoiding additional guide components that increase wind resistance and generate additional airflow noise. This further controls the operating noise while ensuring the strong cooling performance of the whole machine.

[0074] In summary, this invention divides the air conditioner body 10 into independent upper cavities 11 and lower cavities 12 using the partition base 20, completely isolating the upper cross-flow duct 112 from the lower centrifugal duct 121 in physical space. This eliminates the inherent high-frequency whistling, turbulence noise, and airflow pulsation noise of the centrifugal impeller 141 from the root of aerodynamic principles. Simultaneously, the centrifugal impeller 141 in the lower cavity 12 operates independently, and its aerodynamic noise is effectively blocked by the partition base 20, preventing it from superimposing and resonating with the noise source in the upper cavity 11. This completely eliminates the noise superposition effect when traditional dual centrifugal impellers 141 operate synchronously. The upper cross-flow duct 112, enclosed by the cross-flow duct assembly 30 and the evaporator assembly 111, forms a horizontal airflow channel, allowing the air after heat exchange in the evaporator to be directly delivered to the cross-flow impeller 131 along the shortest path in the horizontal direction, without any unnecessary bends or deflections causing wind resistance loss or airflow turbulence. The lower centrifugal air duct 121, enclosed by the condenser assembly 40, the partition base 20, and the air conditioner body 10, forms a turning channel that changes the airflow from horizontal to vertical. This allows air entering the lower cavity 12 horizontally to smoothly turn into vertical flow after heat exchange in the condenser, under the suction of the centrifugal impeller 141. This airflow turning is achieved without additional guiding components, fully utilizing the radial air pressure advantage of the centrifugal impeller 141 to ensure that the unit's strong air delivery capacity and core cooling efficiency are not compromised by noise reduction design. The motor assembly 21 is fixedly mounted on the partition base 20, forming a first output end 211 and a second output end 212 in the vertical direction. A single motor simultaneously drives the impeller assemblies in both the upper and lower independent cavities, eliminating the need for additional drive motors and their associated transmission mechanisms. This achieves differentiated impeller configurations and physical space isolation for noise reduction while retaining the cost-effectiveness advantages of a single-motor portable air conditioner, including a simplified structure, low failure rate, convenient assembly, and controllable mass production costs.

[0075] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A single-motor hybrid air duct noise reduction portable air conditioner, characterized in that, include: An air conditioner body, wherein a partition base is provided in the middle of the air conditioner body, and the air conditioner body is divided into a separate upper cavity and a lower cavity; A cross-flow duct assembly and an evaporator assembly are disposed in the upper cavity and fixedly connected to the partition base, and the cross-flow duct assembly and the evaporator assembly are arranged to form an upper cross-flow duct in which the airflow flows in the horizontal direction. A condenser assembly is disposed in the lower cavity and fixedly connected to the partition base, and the condenser assembly, the partition base and the air conditioner body enclose and form a lower centrifugal air duct that changes the airflow direction from horizontal to vertical. The partition base includes a motor assembly, a first impeller assembly in the upper cross-flow duct, and a second impeller assembly in the lower centrifugal duct. The motor assembly forms a first output end and a second output end in the vertical direction. The first output end drives the first impeller assembly to rotate and causes the air in the upper cross-flow duct to flow horizontally. The second output end drives the second impeller assembly to rotate and causes the horizontally entering air in the lower centrifugal duct to flow vertically.

2. The single-motor hybrid air duct noise reduction portable air conditioner according to claim 1, characterized in that, The partition base includes an upper air duct base and a lower air duct base, and the upper air duct base and the lower air duct base are fixedly connected. A motor mounting cavity for mounting the motor assembly is formed between the partition base and the cross-flow duct assembly, and the motor assembly is disposed through the upper duct base. The first output end is rotatably disposed through the cross-flow duct assembly, and the second output end is rotatably disposed through the lower duct base.

3. The single-motor hybrid air duct noise reduction portable air conditioner according to claim 2, characterized in that, The first wind turbine assembly includes a cross-flow wind turbine disposed in the upper cross-flow duct, and the lower end of the cross-flow wind turbine is fixedly connected to the first output end. The cross-flow duct assembly includes a cross-flow duct cover plate, and the first impeller assembly further includes a rotating support member disposed above the cross-flow duct cover plate. The upper end of the cross-flow impeller can rotatably pass through the cross-flow duct cover plate and is rotatably connected to the rotating support member.

4. The single-motor hybrid air duct noise reduction portable air conditioner according to claim 3, characterized in that, The cross-flow fan wheel includes a columnar fan blade body, the lower end of which is provided with a cross-flow locking hole that is fixedly connected to the first output end locking position, and the upper end of which is provided with a rotating support rod that is rotatably connected to the rotating support member.

5. The single-motor hybrid air duct noise reduction portable air conditioner according to claim 4, characterized in that, The columnar fan blade body includes an upper connecting circular plate and a lower connecting circular plate arranged around the same axis and in a vertical direction. A plurality of through-flow arc-shaped plate blades are equally spaced along the circumference of the upper connecting circular plate and the lower connecting circular plate. The angle between the line connecting the two sides of the through-flow arc-shaped plate blades and the extended line of the radius of the upper connecting circular plate and the lower connecting circular plate forms an acute angle.

6. The single-motor hybrid air duct noise reduction portable air conditioner according to claim 5, characterized in that, A plurality of through-flow circular reinforcing rings are provided between the upper connecting circular plate and the lower connecting circular plate. A plurality of through-flow arc plate blades are arranged perpendicularly through the plurality of through-flow circular reinforcing rings. The through-flow circular reinforcing rings are used to improve the toughness of the middle section of the plurality of through-flow arc plate blades.

7. The single-motor hybrid air duct noise reduction portable air conditioner according to claim 2, characterized in that, The second wind turbine assembly includes a centrifugal wind turbine disposed between the upper wind duct base and the lower wind duct base. The centrifugal wind turbine includes a circular wind turbine base connected to the first output end. The periphery of the circular wind turbine base extends downward in the vertical direction to form a plurality of centrifugal arc-shaped plate blades. The lower outer side of the plurality of centrifugal arc-shaped plate blades is provided with a centrifugal circular reinforcing ring for fixing the strength of the blades.

8. The single-motor hybrid air duct noise reduction portable air conditioner according to claim 7, characterized in that, The inner circumference of the circular wind turbine base extends to form several rotating arc plates, which converge at the center of the circular wind turbine base to form a rotating connecting cylinder, which is fixedly connected to the second output end.

9. The single-motor hybrid air duct noise reduction portable air conditioner according to claim 8, characterized in that, The upper and lower end faces of the rotating arc plate are provided with transmission reinforcing ribs, which are fixedly connected to the side of the rotating connecting cylinder. The transmission reinforcing ribs are used to improve the strength of the rotating arc plate.

10. The single-motor hybrid air duct noise reduction portable air conditioner according to claim 9, characterized in that, The lower cavity is equipped with a compressor assembly and a water pumping assembly, and the cooler assembly, the compressor assembly, and the water pumping assembly are located below the centrifugal impeller; The air conditioner body is provided with a centrifugal air inlet arranged in a horizontal direction, and the cooler assembly is arranged corresponding to the centrifugal air inlet so that the air passing through the centrifugal air inlet must flow through the cooler assembly before entering the lower centrifugal air duct. The upper air duct base and the lower air duct base are provided with centrifugal air outlets arranged in a horizontal direction. The centrifugal air outlets are located at the same horizontal height as the centrifugal impeller, so that the centrifugal impeller drives the air below it to rise vertically and then discharges it horizontally through the centrifugal air outlets.

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