Air conditioner bottom shell, air conditioner indoor unit and air conditioner

Abstract

The application provides an air conditioner bottom shell, an air conditioner indoor unit and an air conditioner. The air conditioner bottom shell is provided with an air duct, the air duct is provided with a fan blade mounting cavity and a matching platform, the matching platform is arranged at the end close to the length direction of the fan blade mounting cavity, and the matching platform is annularly arranged on the radial outer side of the fan blade mounting cavity. The matching platform is provided with a streamlined air guide surface, and the air guide surface is inclined towards the middle part of the length direction of the fan blade mounting cavity. The air conditioner bottom shell can realize air duct optimization, is beneficial to the flow of the air field, can increase the air volume, reduce the condensation problem of the platforms on the two sides of the air duct, and is beneficial to solving the rattle problem of the left and right air outlets of the air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to an air conditioner base, an air conditioner indoor unit, and an air conditioner. Background Technology

[0002] As the indoor unit of a split-type refrigeration system, the indoor unit is prone to condensation on its evaporator during cooling due to low outlet air temperature, high ambient humidity, and low overall airflow speed. If this continues for an extended period, a large number of fine water droplets will accumulate inside the air duct 101, particularly at the mating platform 102 on both ends of the cross-flow fan blades and the bottom casing air duct 101 (e.g.,...). Figure 1 (As shown). The water droplets on both sides not only greatly affect the cooling effect of the air conditioner, but also, if not dealt with in time, too many fine water droplets will accumulate, forming oval water balls of about 1cm on the mating platforms 102 at both ends of the air conditioner's bottom casing 100. When the air conditioner's indoor unit fan speed is suddenly increased, the oval water balls will be blown out with the wind, resulting in the phenomenon of the air conditioner blowing water, which is blown into the room and even onto people's bodies, causing a very poor human comfort experience. Water droplets forming in the air duct 101 also pose a certain safety hazard to the indoor unit, as it is operated with electricity.

[0003] There is an air conditioner that solves the condensation problem at both ends by designing a flow groove structure and a spiral arc rib structure on both sides of the cross-flow fan blade. However, this solution only solves the condensation caused by the large temperature difference between the two ends of the first end cover, and still cannot solve the condensation problem at the mating platform position of the two ends of the cross-flow fan blade and the bottom shell air duct. Summary of the Invention

[0004] The primary objective of this invention is to provide an air conditioner base shell that optimizes the air duct, facilitates airflow, increases air volume, reduces condensation on both sides of the air duct platform, and helps resolve the wheezing noise from the left and right air outlets of the air conditioner.

[0005] A second objective of this invention is to provide an indoor air conditioner unit with the aforementioned air conditioner base casing.

[0006] A third objective of the present invention is to provide an air conditioner having the above-described indoor unit.

[0007] To achieve the aforementioned first objective, the present invention provides an air conditioner base shell, in which an air duct is provided, a fan blade mounting cavity and a mating platform are provided within the air duct, the mating platform is located at the end near the fan blade mounting cavity in the length direction, and the mating platform is arranged radially outside the fan blade mounting cavity; the mating platform is provided with a streamlined air guide surface, which is inclined toward the middle of the fan blade mounting cavity in the length direction.

[0008] As can be seen from the above scheme, based on airflow field research, when the mating platforms on both sides of the air duct inside the air conditioner's casing are perpendicular to the end wall and parallel to the outer peripheral wall of the cross-flow fan, the airflow on both sides of the cross-flow fan will experience aerodynamic separation due to the right-angle shape of the structure facing the fan. This invention, by designing the mating platforms in a streamlined shape, avoids aerodynamic separation and the creation of a full adhesion zone due to the streamlined design of the structural surface, thus promoting smoother airflow on both sides of the air duct inside the casing. Smoother airflow on both sides of the air duct avoids the re-adhesion zone of airflow on both sides of the cross-flow fan, which helps solve the condensation problem on the mating platforms on both sides of the casing. Smoother airflow on the left and right sides of the air duct increases the indoor unit's air volume and improves performance. Simultaneously, avoiding aerodynamic separation and the creation of a full adhesion zone further facilitates smoother airflow on both sides of the air duct. Preliminary analysis suggests this helps solve the whooshing noise problem caused by poor airflow on the left and right sides of the air conditioner's indoor unit. Ultimately, this optimizes condensation, performance, and noise in the air conditioner's indoor unit, achieving the goal of improving the overall operating performance of the air conditioner.

[0009] A preferred embodiment is that the air duct is provided with an end wall and a guide wall, the end wall being located at the end of the guide wall in the length direction; the end wall includes a first wall portion and a second wall portion arranged along the length direction of the fan blade mounting cavity, the second wall portion being closer to the middle of the fan blade mounting cavity in the length direction than the first wall portion; the edge of the guide surface away from the guide wall is connected to the first wall portion, and the edge of the guide surface near the guide wall is connected to the second wall portion.

[0010] A further proposed solution is that both the first and second walls are connected to the air guide surface via rounded corners.

[0011] A further option is that both the first and second walls are set perpendicular to the air guide wall.

[0012] A preferred embodiment is that an air guide groove is provided on the air guide surface, and the air guide groove runs through the mating platform along the length of the fan blade mounting cavity.

[0013] Therefore, it can be seen that the air guide duct can rotate and guide the air on both sides of the cross-flow fan blades and blow it out of the air outlet.

[0014] A further option is to have two or more air guide ducts, with multiple air guide ducts arranged at intervals along the air outlet direction of the fan blade mounting cavity.

[0015] This demonstrates that it can improve the air guiding effect.

[0016] A further proposed solution is to arrange each air guide duct around the circumference of the fan blade mounting cavity, with the axis of the fan blade mounting cavity as the center.

[0017] A further proposed solution is to have a distance between two adjacent air guide slots ranging from 10 mm to 25 mm, and a slot width ranging from 1 mm to 5 mm.

[0018] A preferred embodiment is that the air guide trough extends in a spiral shape, gradually approaching the air outlet end of the air duct from one end near the first wall to the other end away from the first wall.

[0019] It can be seen that the spiral-shaped air guide groove structure, along with the rotation direction of the cross-flow fan blades and the air duct, can make the air field on both sides of the air duct inside the bottom shell form a spiral wind that blows out of the air duct, which is more conducive to the spiral full-attachment flow of the air field along the rotation direction of the cross-flow fan blades.

[0020] A further option is to have the spiral drop of the air guide duct in the range of 1 to 5 millimeters.

[0021] A preferred embodiment is to use two mating platforms, which are respectively located at both ends of the fan blade mounting cavity along its length.

[0022] To achieve the second objective mentioned above, the present invention provides an indoor air conditioning unit, including a fan blade and the aforementioned air conditioning base shell, wherein the fan blade is installed in the fan blade mounting cavity, and a platform is arranged radially outside the fan blade and spaced apart from the fan blade.

[0023] To achieve the third objective mentioned above, the present invention provides an air conditioner, comprising an outdoor unit and an indoor unit connected to each other. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the existing air conditioner base casing and the platform.

[0025] Figure 2 This is a structural diagram from a first perspective of an embodiment of the air conditioner bottom shell of the present invention.

[0026] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0027] Figure 4 yes Figure 2 A magnified view of a section at point B in the middle.

[0028] Figure 5 This is a structural diagram from a second perspective of an embodiment of the air conditioner bottom shell of the present invention.

[0029] Figure 6 yes Figure 5 A magnified view of a section at point C.

[0030] Figure 7 This is a structural diagram of the air conditioner base and cross-flow fan blades in an embodiment of the air conditioner indoor unit of the present invention.

[0031] Figure 8 yes Figure 7 A magnified view of a section at point D.

[0032] Figure 9This is a cross-sectional view of an embodiment of the air conditioner bottom shell of the present invention.

[0033] Figure 10 This is a schematic diagram illustrating the principle of aerodynamic separation when airflow passes through a right-angled shape.

[0034] Figure 11 This is a schematic diagram illustrating the principle of the heavy adhesion zone generated when airflow passes through the guide rounded corner straight surface.

[0035] Figure 12 This is a schematic diagram of the airflow passing through the streamlined mating platform in the embodiment of the air conditioner bottom shell of the present invention.

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0037] Various exemplary embodiments of the invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the invention or its application or use. The invention can be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the invention thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0038] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, without excluding the possibility of encompassing other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0040] All terms used in this invention (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0041] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0042] See Figures 2 to 9 The air conditioner in this embodiment includes an outdoor unit and an indoor unit connected to each other. The indoor unit includes a fan blade 1 and a base casing 2, and the fan blade 1 is a cross-flow fan blade.

[0043] An air duct 21 is provided inside the air conditioner bottom shell 2. The air duct 21 is provided with a fan blade mounting cavity 22 and two mating platforms 3. The fan blade 1 is installed in the fan blade mounting cavity 22. The two mating platforms 3 are respectively located at the two ends near the fan blade mounting cavity 22 in the length direction. The mating platforms 3 are arranged around the radial outer side of the fan blade 1 and are spaced apart from the fan blade 1.

[0044] The air duct 21 is provided with two end walls 23 and a guide wall 24. The two end walls 23 are respectively located at both ends of the guide wall 24 along its length. Each end wall 23 includes a first wall portion 231 and a second wall portion 232 arranged along the length of the fan blade mounting cavity 22. The second wall portion 232 is closer to the middle of the fan blade mounting cavity 22 along its length than the first wall portion 231.

[0045] Each mating platform 3 is provided with an air guide surface 31. The air guide surface 31 is inclined towards the middle of the length direction of the fan blade mounting cavity 22. The air guide surface 31 extends in a streamlined shape from the side away from the air guide wall 24 to the side close to the air guide wall 24. The air guide surface 31 includes a rounded corner surface 233 and an inclined surface 310. The inclined surface 310 is a plane that is inclined towards the middle of the length direction of the fan blade mounting cavity 22. The rounded corner surface 233 is located at the edge of the inclined surface 310 away from the air guide wall 24. The air guide surface 31 is connected to the first wall portion 231 through the rounded corner surface 233. The edge of the air guide surface 31 close to the air guide wall 24 is connected to the second wall portion 232. The second wall portion 232 and the air guide surface 31 are connected by a transitional rounded corner surface 230. The radius of the rounded corner is 2.5 mm. The rounded corner surface 230 and the air guide surface 31 are smoothly transitioned. The first wall portion 231 and the second wall portion 232 are both set perpendicular to the air guide wall 24.

[0046] An air guide groove 32 is formed on the air guide surface 31, and the air guide groove 32 penetrates the mating platform 3 along the length of the fan blade mounting cavity 22. There are two or more air guide grooves 32, and each air guide groove 32 is arranged at intervals along the air outlet direction of the fan blade mounting cavity 22, and each air guide groove 32 is arranged circumferentially around the axis of the fan blade mounting cavity 22. Each air guide groove 32 extends spirally, and the air guide groove 32 gradually approaches the air outlet end 211 of the air duct 21 from the end near the first wall portion 231 to the end away from the first wall portion 231. The spiral drop d of the air guide groove 32 is in the range of 1 mm to 5 mm.

[0047] See Figure 8 The distance L between two adjacent air guide slots 32 is in the range of 10 mm to 25 mm, and the slot width W of the air guide slot 32 is in the range of 1 mm to 5 mm. Preferably, the distance L between two adjacent air guide slots 32 is 18 mm, the slot width W of the air guide slot 32 is 2 mm, and the spiral drop d of the air guide slot 32 is 3 mm, where the spiral drop d is the height difference between the two ends of the air guide slot 32 in the spiral direction. The spiral structure of the air guide slot 32 follows the rotation direction of the cross-flow fan blade 1 and the air duct 21, allowing the air field on both sides of the air duct 21 inside the bottom shell to form a spiral wind blowing out of the air duct 21, which is more conducive to the spiral full-attach flow of the air field in the rotation direction of the cross-flow fan blade 1.

[0048] According to airflow field studies, when the mating platforms 3 on both sides of the air duct 21 inside the air conditioner casing 2 are platform surfaces perpendicular to the end wall 23 and parallel to the outer peripheral wall of the cross-flow fan 1, the airflow on both sides of the cross-flow fan 1 will undergo aerodynamic separation due to the right-angle shape of the structure facing forward. The principle is as follows: Figure 10 As shown, when airflow passes over a right-angled surface, aerodynamic separation occurs. Additionally, as... Figure 11 As shown, the airflow passes through the guide rounded corner straight surface, which can reduce aerodynamic separation to some extent, but it creates a heavy adhesion zone.

[0049] The principle of this invention is as follows: Figure 12 As shown, this invention designs the mating platform 3 in a streamlined shape. Due to the streamlined surface design, fluid flowing over the streamlined surface avoids aerodynamic separation and generates full-adhesion flow, which is more conducive to smooth airflow on both sides of the air duct 21 inside the bottom shell. The airflow on both sides of the bottom shell and the cross-flow fan blade 1 is smoother and can flow out from both sides of the air duct 21 with full adhesion, reducing aerodynamic separation and greatly increasing the airflow. This helps to reduce condensation on the mating platform 3 on both sides of the bottom shell and reduces noise problems such as whooshing sounds caused by aerodynamic separation when airflow flows through the mating platform 3 on both sides of the air conditioner bottom shell 2, which helps to increase the air volume of the indoor unit. Ultimately, this optimizes the condensation, performance, and noise of the air conditioner indoor unit, thereby improving the overall operating performance of the air conditioner.

[0050] Furthermore, the air guide surface can also be curved, and when it is curved, it bends away from the first wall. The angle θ of inclination of the air guide surface relative to the length direction of the fan blade mounting cavity can be changed as needed. The above changes can also achieve the purpose of the present invention.

[0051] Finally, it should be emphasized that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air conditioner base shell, wherein an air duct is provided inside the air conditioner base shell, and a fan blade mounting cavity and a mating platform are provided inside the air duct, wherein the mating platform is located at the end near the fan blade mounting cavity in the length direction, and the mating platform is arranged radially outside the fan blade mounting cavity; Its features are: The platform is provided with an air guide surface, which is inclined toward the middle of the length direction of the fan blade mounting cavity. The air guide surface extends in a streamlined shape from the side away from the air guide wall of the air duct to the side close to the air guide wall. An air guide groove is formed on the air guide surface, and the air guide groove penetrates the mating platform along the length of the fan blade mounting cavity. The air duct is also provided with an end wall, which is located at the end of the air guide wall in the length direction; The end wall includes a first wall portion and a second wall portion arranged along the length direction of the blade mounting cavity, wherein the second wall portion is closer to the middle of the length direction of the blade mounting cavity than the first wall portion. The edge of the air guide surface away from the air guide wall is connected to the first wall portion, and the edge of the air guide surface near the air guide wall is connected to the second wall portion; The air guide groove extends in a spiral shape, and the air guide groove gradually approaches the air outlet end of the air duct from one end close to the first wall to the end far away from the first wall.

2. The air conditioner base shell according to claim 1, characterized in that: Both the first wall portion and the second wall portion are connected to the air guide surface through rounded corners.

3. The air conditioner base shell according to claim 1, characterized in that: Both the first wall portion and the second wall portion are arranged perpendicular to the air guide wall.

4. The air conditioner base casing according to any one of claims 1 to 3, characterized in that: The number of air guide slots is two or more, and the multiple air guide slots are arranged at intervals along the air outlet direction of the fan blade mounting cavity.

5. The air conditioner base shell according to claim 4, characterized in that: Each of the air guide slots is arranged around the axis of the fan blade mounting cavity along the circumference of the fan blade mounting cavity.

6. The air conditioner base shell according to claim 5, characterized in that: The distance between two adjacent air guide slots is in the range of 10 mm to 25 mm, and the width of the air guide slot is in the range of 1 mm to 5 mm.

7. The air conditioner base casing according to any one of claims 1 to 3, characterized in that: The spiral drop of the air guide trough is in the range of 1 mm to 5 mm.

8. The air conditioner base casing according to any one of claims 1 to 3, characterized in that: The number of mating platforms is two, and the two mating platforms are respectively set at both ends of the length direction of the fan blade mounting cavity.

9. An indoor unit for an air conditioner, characterized in that, The device includes a fan blade and an air conditioner base housing as described in any one of claims 1 to 8, wherein the fan blade is installed within the fan blade mounting cavity, and the mating platform is arranged radially outward from the fan blade and spaced apart from the fan blade.

10. An air conditioner, characterized in that, It includes an outdoor air conditioning unit and an indoor air conditioning unit as described in claim 9, which are interconnected.

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