Cabinet air conditioner

Abstract

The application provides a cabinet air conditioner, and relates to the technical field of air conditioners. The cabinet air conditioner comprises a cabinet body, a guide air piece and an axial flow fan. The guide air piece is provided with a guide air passage. The cabinet body is provided with an air outlet, the guide air piece is arranged in the cabinet body, and the guide air passage is in communication with the air outlet. The axial flow fan is arranged correspondingly to the guide air piece, and the axial flow fan blade of the axial flow fan is completely accommodated in the guide air passage. The circumferential direction of the axial flow fan blade is provided with a plurality of blades, and the ratio of the thickness of the blade in the axial direction of the axial flow fan blade to the length of the guide air passage is 0.6-0.9. According to the application, the axial flow fan of the cabinet air conditioner is arranged correspondingly to the guide air piece, and the axial flow fan blade of the axial flow fan is completely accommodated in the guide air passage. In this way, the blades of the axial flow fan blade are completely wrapped by the side wall of the guide air passage, the problem of the partial exposure of the axial flow fan blade and the formation of a gap is avoided, the loss of air volume is improved, and the air supply volume is increased.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and more specifically, to a cabinet-type air conditioner. Background Technology

[0002] Axial flow cabinet air conditioners mainly consist of axial flow fans, evaporators, control panels, and compressors. They feature large air volume and long air delivery distance, enabling rapid air circulation and cooling.

[0003] In existing technologies, axial flow cabinet air conditioners typically incorporate air guide rings to better direct airflow, concentrating the airflow, optimizing the airflow effect, and effectively preventing short-circuiting between the fan's inlet and outlet airflow. Simultaneously, the air guide rings also rectify the outlet airflow, reducing noise during fan operation.

[0004] However, in existing axial flow cabinet air conditioner fans, the axial flow blades are exposed outside the air guide ring, and there is a gap between the axial flow blades and the air guide ring, which causes airflow to leak from the high-pressure side to the low-pressure side, resulting in air volume loss. Utility Model Content

[0005] The problem this invention addresses is how to improve the airflow loss during the air delivery process of axial flow fan blades.

[0006] To address the aforementioned problems, this utility model provides a cabinet-type air conditioner that can improve airflow loss during the air delivery process of axial fan blades, thereby increasing the air delivery volume.

[0007] This utility model provides a cabinet-type air conditioner, including a cabinet body, an air guide component, and an axial flow fan; The air guide component is provided with an air guide channel; The cabinet body is provided with an air outlet, the air guide is disposed in the cabinet body, and the air guide channel is connected to the air outlet; The axial flow fan is configured corresponding to the air guide component, and the axial flow fan blades are completely housed within the air guide channel. The axial flow fan blades are provided with multiple blades spaced circumferentially, and the ratio of the thickness of the blades in the axial direction of the axial flow fan blades to the length of the air guide channel ranges from 0.6 to 0.9.

[0008] This application addresses the issue of axial flow fans in cabinet air conditioners being positioned corresponding to air guide components, with the axial fan blades completely contained within the air guide channel. This ensures the blades are fully enclosed by the sidewalls of the air guide channel, preventing gaps caused by exposed blades and thus improving airflow loss and increasing delivery volume. Setting the ratio of the blade thickness along the axial direction to the length of the air guide channel to 0.6 to 0.9 ensures efficient operation of the axial fan within the air guide channel with minimal leakage.

[0009] This application sets the thickness of the blades in the axial direction of the axial flow fan blades to be less than the length of the air guide channel, which can reduce leakage at the blade tip gap and thus reduce the loss of air volume.

[0010] In an optional embodiment, the ratio of the distance from the blade tip to the air guide channel on the air inlet side to the thickness of the blade in the axial direction of the axial flow fan blade is in the range of 0.1 to 0.3.

[0011] This application ensures that the axial fan blades perform work efficiently within the air guide channel with minimal leakage by setting the range of the aforementioned ratio.

[0012] In an optional embodiment, the air guide channel includes an air guide section and a ventilation section connected in sequence; The air guide section is located on one side of the air inlet of the air guide channel, the ventilation section is located on one side of the air outlet of the air guide channel, and the ventilation cross-section of the air guide section is larger than the ventilation cross-sectional area of ​​the ventilation section. In the axial direction of the air guide channel, the blade is partially located in the air guide section and partially located in the ventilation section.

[0013] This application sets up an air guide channel with an air guide section and a ventilation section, and makes the ventilation cross-section of the air guide section larger than the ventilation cross-sectional area of ​​the ventilation section, so that the blade part is located in the air guide section and the other part is located in the ventilation section. This improves the influence of the air guide channel on the flow collection range of the axial flow fan blades, and can also improve the leakage problem at the same time.

[0014] In an optional embodiment, the outer edge of the blade of the axial flow fan is projected as an arc on a plane perpendicular to the axis of the axial flow fan, and the distance between the arc and the axis of the axial flow fan gradually decreases from the leading edge of the blade to the trailing edge of the blade.

[0015] The use of variable diameter axial flow fan blades in this application can improve air volume and efficiency, reduce noise, ensure operational safety, and improve aerodynamic performance.

[0016] In an optional embodiment, the cross-section of the ventilation section is circular, and the radius gradually decreases in the direction away from the ventilation section to form a draft angle; The spatial region swept by the outer edge of the blade during rotation forms an envelope surface; On a cross section passing through the axis of the axial flow fan blade, the intersection of the cross section with the envelope surface and the intersection of the cross section with the inner wall surface of the ventilation section are parallel.

[0017] This application ensures that the intersection of the cross section on the axis of the axial flow fan blade with the envelope surface and the intersection of the cross section with the inner wall of the ventilation section are parallel, thus keeping the radial clearance consistent and avoiding the problem of increased airflow resistance, thereby reducing leakage.

[0018] In an optional implementation, the draft angle ranges from 2° to 8°.

[0019] This application sets the draft angle to a range of 2° to 8°, which facilitates demolding during injection molding and also enables better air delivery.

[0020] In an optional embodiment, the diameter D of the axial flow fan blade, the number N of the axial flow fan blade, the installation angle α of the blade, the thickness H1 of the blade in the axial direction of the axial flow fan blade, and the blade density t satisfy the following formula: N*H1*cotα+N*t=πD; Among them, N ranges from 3 to 7, t ranges from 25 mm to 50 mm, and H1 ranges from 80 mm to 120 mm.

[0021] This application ensures that the parameters of the axial flow fan blades satisfy the above formula, thus allowing the axial flow fan blades to have better parameters while maintaining the same work output.

[0022] In an optional embodiment, the air inlet of the air guide section is elliptical.

[0023] This application sets the air inlet of the air guide section to be elliptical, which can increase the area of ​​the air inlet and improve the space utilization rate.

[0024] In an optional embodiment, the major axis of the elliptical air inlet is parallel to the height direction of the cabinet body, and the minor axis is parallel to the width direction of the cabinet body, and both the major axis and the minor axis are larger than the diameter of the ventilation section.

[0025] The above-mentioned settings allow for a larger air inlet area, thereby increasing the airflow collection range of the air guide and enabling the airflow in the large cavity of the cabinet body to be fully directed into the rotation area of ​​the axial fan blades, thus increasing the air volume. The increased air inlet area also allows the airflow to enter the air inlet more smoothly, further enhancing the air volume.

[0026] In an optional embodiment, the air guide section gradually changes from an elliptical shape to a circular shape in the air intake direction to correspond to the ventilation section (114).

[0027] This application makes the air guide section gradually change from an elliptical shape to a circle in the air intake direction. This can avoid abrupt changes in cross-section that would affect the air intake effect and make the airflow smoother. Attached Figure Description

[0028] Figure 1 A schematic diagram showing the position of the axial fan blades of the cabinet air conditioner provided in the air guide channel of the air guide component, for the purpose of this utility model embodiment; Figure 2 Another perspective structural schematic diagram of the position of the axial flow fan blades of the cabinet air conditioner provided in the embodiment of this utility model within the air guide channel of the air guide component; Figure 3 A projected view of the axial fan blades of a cabinet air conditioner provided for an embodiment of this utility model; Figure 4 A cross-sectional view of the axial fan blades of the cabinet air conditioner provided in this embodiment of the utility model, showing their placement within the air guide channel of the air guide component. Figure 5 for Figure 4 A partial schematic diagram; Figure 6 A blade development diagram of the axial flow fan blades of a cabinet air conditioner provided in an embodiment of this utility model.

[0029] Icons: 100-Cabinet-type air conditioner; 110-Air guide component; 111-Air guide duct; 112-Air inlet; 113-Air guide section; 114-Ventilation section; 115-Air outlet; 130-Axial flow fan; 131-Axial flow fan blade; 132-Blade; 150-Envelope space; 151-Front envelope surface; 152-Rear envelope surface; 153-Envelope curved surface. Detailed Implementation

[0030] In existing technologies, axial flow cabinet air conditioners typically incorporate air guide rings to better direct airflow, concentrating the airflow, optimizing the airflow effect, and effectively preventing short-circuiting between the fan's inlet and outlet airflow. Simultaneously, the air guide rings also rectify the outlet airflow, reducing noise during fan operation.

[0031] However, in existing axial flow cabinet air conditioner fans, the axial flow blades are exposed outside the air guide ring, and there is a gap between the axial flow blades and the air guide ring, which causes airflow to leak from the high-pressure side to the low-pressure side, resulting in air volume loss.

[0032] To address the aforementioned problems, this utility model provides a cabinet-type air conditioner that can improve airflow loss during the air delivery process of axial fan blades, thereby increasing the air delivery volume.

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0034] Please refer to Figure 1This utility model provides a cabinet-type air conditioner 100, which can supply air into a space to achieve air conditioning, such as cooling and heating.

[0035] Please refer to Figures 1 to 5 In this embodiment, the cabinet air conditioner 100 includes a cabinet body (not shown), an air guide 110, and an axial fan 130. The air guide 110 is provided with an air guide channel 111. The cabinet body is provided with an air outlet, the air guide 110 is disposed within the cabinet body, and the air guide channel 111 communicates with the air outlet. The axial fan 130 is disposed corresponding to the air guide 110, and the axial fan blades 131 of the axial fan 130 are completely contained within the air guide channel 111.

[0036] In this embodiment, the axial flow fan 130 of the cabinet air conditioner 100 is arranged to correspond to the air guide 110, and the axial flow fan blade 131 of the axial flow fan 130 is completely contained within the air guide channel 111. In this way, the blades 132 of the axial flow fan blade 131 are completely wrapped by the side wall of the air guide channel 111, avoiding the problem of gaps formed by the partial exposure of the axial flow fan blade 131, thereby improving the loss of air volume and increasing the air supply volume.

[0037] It should also be noted that the cabinet air conditioner 100 includes other structures such as a heat exchanger. Generally, the cabinet unit has an air inlet panel with a filter, and the heat exchanger is located inside the cabinet unit, opposite the filter. The axial fan 130 can be connected to the air guide 110 via a mounting base or to other components of the cabinet air conditioner 100. When the axial fan 130 operates, it draws outside air from the air inlet panel through the filter into the cabinet unit, where it exchanges heat with the heat exchanger before being delivered through the air guide duct 111 to the air outlet, which then directs the air into the room, thus regulating the indoor air temperature. The air guide 110 is generally located inside the cabinet unit, between the heat exchanger and the air outlet panel of the cabinet unit, and is fixedly connected to the cabinet unit.

[0038] Please refer to Figures 1 to 5 In this embodiment, the axial flow fan blade 131 is provided with a plurality of blades 132 at circumferential intervals, and the thickness of the blades 132 in the axial direction of the axial flow fan blade 131 is less than the length of the air guide channel 111.

[0039] In this embodiment, the thickness of the blade 132 in the axial direction of the axial flow fan blade 131 is set to be less than the length of the air guide channel 111. This can reduce leakage at the blade tip gap, thereby reducing the loss of air volume.

[0040] It should be noted that the thickness of blade 132 in the axial direction of axial flow fan blade 131 is the projected width of blade 132 obtained by projecting the complete blade 132 onto the cross-section after axially cutting the axial flow fan blade 131, as shown in H1. It can also be understood as the maximum axial width of blade 132, or as the axial position difference between the leading and trailing edges of the blade. Furthermore, it can be understood as the distance between the two axially opposite planes of the envelope space 150 formed by the axial flow fan blade 131 during rotation.

[0041] Please refer to Figures 1 to 5 The envelope space 150 formed by the rotation of the blades 132 of the axial flow fan 131 includes a front envelope surface 151 near the air inlet 112, a rear envelope surface 152 near the air outlet 115, and an outer envelope surface 153. The distance H1 can be considered as the minimum distance between the front envelope surface 151 and the rear envelope surface 152.

[0042] In this embodiment, the ratio of the distance from the tip of the blade 132 to the air guide channel 111 located on the side of the air inlet 112 to the thickness of the blade 132 in the axial direction of the axial flow fan blade 131 ranges from 0.1 to 0.3.

[0043] This embodiment ensures that the axial flow fan blade 131 performs work efficiently within the air guide channel 111 with minimal leakage by setting the range of the above ratio.

[0044] It should be noted that the distance from the blade tip to the air guide duct 111 on the side of the air inlet 112, as shown by L1 in the figure, can be understood as the distance between the plane of the envelope space 150 formed by the rotating blades 132 of the axial fan blade 131 near the air inlet 112 and the plane of the air guide 110 on the side of the air inlet 112. Alternatively, it can be understood as the minimum distance between the projection of the blade 132 on the cross-section through the axis of the axial fan blade 131 and the plane of the air guide 110 on the side of the air inlet 112. The ratio can be 0.2. For example, when the thickness of the blade 132 is 100mm, this distance can be set to 20mm, thus limiting the installation position of the axial fan 130 by restricting this distance. The value of H1 ranges from 80mm to 120mm, and can be determined according to the spatial layout, and then the specific value of L1 is determined based on the ratio.

[0045] Furthermore, the ratio of the thickness of the blade 132 in the axial direction of the axial flow fan blade 131 to the length of the air guide channel 111 ranges from 0.6 to 0.9.

[0046] Please refer to Figures 1 to 5 In this embodiment, by setting the range of the above ratio, it can be ensured that the axial flow fan blade 131 performs work more efficiently in the air guide channel 111 and with less leakage.

[0047] It should be noted that the length of the air guide channel 111 refers to the minimum distance between the plane containing the air inlet 112 and the plane containing the air outlet 115 of the air guide channel 111. The length of the air guide channel 111 is the dimension marked H2 in the figure. The value of the ratio can be selected within a certain range according to actual needs. It can be 0.6, 0.7, 0.8, 0.9, or even more precise parameters such as 0.62, 0.74, etc. The value of H2 can be 130mm.

[0048] Furthermore, the air guide duct 111 includes an air guide section 113 and a ventilation section 114 connected in sequence. The air guide section 113 is located on one side of the air inlet 112 of the air guide duct 111, and the ventilation section 114 is located on one side of the air outlet 115 of the air guide duct 111. The ventilation cross-section of the air guide section 113 is larger than the ventilation cross-sectional area of ​​the ventilation section 114. In the axial direction of the air guide duct 111, the blade 132 is partially located in the air guide section 113 and partially located in the ventilation section 114.

[0049] In this embodiment, the air guide channel 111 is provided with an air guide section 113 and a ventilation section 114, and the ventilation cross-section of the air guide section 113 is larger than the ventilation cross-sectional area of ​​the ventilation section 114. The blade 132 is partially located in the air guide section 113 and partially located in the ventilation section 114. This improves the influence of the air guide channel 111 on the flow collection range of the axial flow blade 131 and can also improve the leakage problem at the same time.

[0050] It should be noted that the ventilation section can be understood as the area perpendicular to the axis at different locations of the air guide section 113 and the ventilation section 114.

[0051] In this embodiment, the projection of the outer edge of the blade 132 of the axial flow fan blade 131 onto a plane perpendicular to the axis of the axial flow fan blade 131 is an arc, and the distance between the arc and the axis of the axial flow fan blade 131 gradually decreases from the leading edge of the blade 132 toward the trailing edge of the blade 132.

[0052] The variable diameter axial flow fan blade 131 selected in this embodiment can improve air volume and efficiency, reduce noise, ensure operational safety, and improve aerodynamic performance.

[0053] In one embodiment of this application, the maximum diameter of the outer edge of the blade 132 of the axial flow fan 131 projected onto a plane perpendicular to the axis of the axial flow fan 131 is 517.67 mm, while the minimum diameter is 509.74 mm. Of course, in other embodiments of this application, the selection of the maximum and minimum diameters can be set according to actual needs.

[0054] Please refer to Figures 1 to 5In this embodiment, the cross-section of the ventilation section 114 is circular, and the radius gradually decreases in the direction away from the ventilation section 114 to form a draft angle. The spatial area swept by the outer edge of the blade 132 during rotation forms an envelope surface 153. On the cross-section through the axis of the axial flow blade 131, the intersection line of the cross-section and the envelope surface 153 is parallel to the intersection line of the cross-section and the inner wall surface of the ventilation section 114.

[0055] In this embodiment, the intersection of the cross section on the axis of the axial flow fan blade 131 with the line of intersection of the cross section with the inner wall of the ventilation section 114 is made parallel to keep the radial clearance consistent, thereby avoiding the problem of increased airflow resistance and reducing leakage.

[0056] It should be noted that the envelope surface 153 is the outer envelope surface 153 of the envelope space 150 formed by the blade 132 during rotation. Since the blade 132 is a variable diameter blade, the outer envelope surface 153 of the envelope space 150 will maintain a uniform gap with the inner wall of the ventilation section 114, thus avoiding the problem that the gap between the outer envelope surface 153 and the inner wall of the ventilation duct becomes smaller in the air delivery direction due to the cooperation between the constant diameter axial flow fan blade 131 and the ventilation section 114 with a demolding slope.

[0057] It can also be understood as follows: on the cross section through the axis of the axial flow fan blade 131, the angle between the intersection of the cross section and the envelope surface 153 and the axis of the axial flow fan blade 131 is θ1, and the angle between the intersection of the cross section and the inner wall of the ventilation section 114 and the axis of the axial flow fan blade 131 is θ2, θ1=θ2, so that the distance marked as σ in the figure remains unchanged.

[0058] Please refer to Figures 1 to 5 In this embodiment, the draft angle ranges from 2° to 8°.

[0059] In this embodiment, the draft angle is set to a range of 2° to 8°, which facilitates demolding during injection molding and also enables better air delivery.

[0060] Please refer to Figures 1 to 6 In this embodiment, the diameter D of the axial flow fan blade 131, the number N of the blades 132 of the axial flow fan blade 131, the installation angle α of the blades 132, the thickness H1 of the blades 132 in the axial direction of the axial flow fan blade 131, and the blade density t satisfy the following formula: N*H1*cotα+N*t=πD.

[0061] In this embodiment, the parameters of the axial flow fan blade 131 satisfy the above formula, so that the parameters of the axial flow fan blade 131 are better while the work done remains unchanged.

[0062] Furthermore, the value of N ranges from 3 to 7, the value of t ranges from 25 mm to 50 mm, and the value of H1 ranges from 80 mm to 120 mm.

[0063] This embodiment limits the range of values ​​for the above parameters, which allows all parameters of the axial flow fan blade 131 to be optimized.

[0064] Furthermore, the air inlet 112 of the air guide section 113 is elliptical, and the major axis of the elliptical air inlet 112 is parallel to the height direction of the cabinet body, and the minor axis is parallel to the width direction of the cabinet body. Both the major axis and the minor axis are larger than the diameter of the ventilation section 114. The air guide section 113 gradually changes from elliptical to circular in the air intake direction to correspond to the diameter of the ventilation section 114.

[0065] In this embodiment, the air inlet 112 of the air guide section 113 is set to an elliptical shape, which increases the area of ​​the air inlet 112 and improves space utilization. Most importantly, the increased area of ​​the air inlet 112 increases the airflow collection range of the air guide component 110, effectively guiding the airflow from the large cavity inside the cabinet body into the rotation area of ​​the axial fan blade 131, thereby increasing the air volume. The increased area of ​​the air inlet 112 also allows for smoother airflow into the inlet 112, further enhancing the air volume. The gradual transition from an elliptical shape to a circular shape avoids abrupt changes in cross-section, resulting in smoother airflow.

[0066] Furthermore, the connection between the air guide section 113 and the ventilation section 114 is transitioned by rounded corners, which can avoid the problem of abrupt changes in the ventilation cross section and thus affect the air supply.

[0067] In summary, this embodiment arranges the axial fan 130 of the cabinet air conditioner 100 to correspond to the air guide 110, and allows the axial fan blades 131 of the axial fan 130 to be completely contained within the air guide channel 111. In this way, the blades 132 of the axial fan blades 131 are completely wrapped by the side wall of the air guide channel 111, avoiding the problem of gaps formed by the partial exposure of the axial fan blades 131, thereby improving air volume loss and increasing air supply volume.

[0068] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A cabinet-type air conditioner, characterized in that, Includes the cabinet body, air guide (110) and axial flow fan (130); The air guide (110) is provided with an air guide channel (111). The cabinet body is provided with an air outlet, the air guide (110) is disposed in the cabinet body, and the air guide channel (111) is connected to the air outlet. The axial flow fan (130) is arranged corresponding to the air guide (110), and the axial flow fan blade (131) of the axial flow fan (130) is completely housed in the air guide channel (111). The axial flow fan blade (131) is provided with a plurality of blades (132) spaced circumferentially. The ratio of the thickness of the blade (132) in the axial direction of the axial flow fan blade (131) to the length of the air guide channel (111) ranges from 0.6 to 0.

9.

2. The cabinet-type air conditioner according to claim 1, characterized in that, The ratio of the distance from the tip of the blade (132) to the air guide channel (111) on the side of the air inlet (112) to the thickness of the blade (132) in the axial direction of the axial flow fan blade (131) ranges from 0.1 to 0.

3.

3. The cabinet-type air conditioner according to claim 1, characterized in that, The air guide channel (111) includes an air guide section (113) and a ventilation section (114) connected in sequence. The air guide section (113) is located on one side of the air inlet (112) of the air guide channel (111), and the ventilation section (114) is located on one side of the air outlet (115) of the air guide channel (111). The ventilation cross-section of the air guide section (113) is larger than the ventilation cross-sectional area of ​​the ventilation section (114). In the axial direction of the air guide channel (111), the blade (132) is partially located in the air guide section (113) and partially located in the ventilation section (114).

4. The cabinet-type air conditioner according to claim 3, characterized in that, The outer edge of the blade (132) of the axial flow fan (131) is projected as an arc on a plane perpendicular to the axis of the axial flow fan (131), and the distance between the arc and the axis of the axial flow fan (131) gradually decreases from the leading edge of the blade (132) toward the trailing edge of the blade (132).

5. The cabinet-type air conditioner according to claim 3, characterized in that, The cross-section of the ventilation section (114) is circular, and the radius gradually decreases in the direction away from the ventilation section (114) to form a draft angle; The spatial region swept by the outer edge of the blade (132) during rotation forms an envelope surface (153). On a cross section passing through the axis of the axial fan blade (131), the line of intersection of the cross section with the envelope surface (153) and the line of intersection of the cross section with the inner wall of the ventilation section (114) are parallel.

6. The cabinet-type air conditioner according to claim 5, characterized in that, The draft angle ranges from 2° to 8°.

7. The cabinet air conditioner according to any one of claims 1-6, characterized in that, The diameter D of the axial flow fan blade (131), the number N of the blades (132) of the axial flow fan blade (131), the installation angle α of the blades (132), the thickness H1 of the blades (132) in the axial direction of the axial flow fan blade (131), and the blade density t satisfy the following formula: N*H1*cotα+N*t=πD; in, The value of N ranges from 3 to 7, the value of t ranges from 25 mm to 50 mm, and the value of H1 ranges from 80 mm to 120 mm.

8. The cabinet air conditioner according to any one of claims 3-6, characterized in that, The air inlet (112) of the air guide section (113) is elliptical.

9. The cabinet-type air conditioner according to claim 8, characterized in that, The major axis of the elliptical air inlet (112) is parallel to the height direction of the cabinet body, and the minor axis is parallel to the width direction of the cabinet body. Both the major axis and the minor axis are larger than the diameter of the ventilation section (114).

10. The cabinet-type air conditioner according to claim 8, characterized in that, The air guide section (113) gradually changes from an elliptical shape to a circular shape in the air intake direction to correspond to the ventilation section (114).

Images