Air inlet cover, fresh air module and air conditioner

Abstract

This application relates to the field of air conditioner technology, and discloses an air inlet shroud, a fresh air module, and an air conditioner. The air inlet shroud provided in this application includes a shroud body and a rectifier. A rectifier groove is recessed on the shroud body, and the rectifier is disposed within the rectifier groove. At least one rectifier hole is opened on the rectifier, and the size of the at least one rectifier hole gradually increases along the opening direction of the rectifier hole. This air inlet shroud, by setting a rectifier within the shroud body and opening a rectifier hole on the rectifier, forces turbulent airflow entering the shroud body to pass through the rectifier hole. The turbulent airflow changes its flow direction after colliding with the hole wall, thereby achieving rectification of the turbulent airflow. Furthermore, by making the size of the rectifier hole gradually increase along the opening direction of the rectifier groove, the flow velocity of the turbulent airflow decreases after passing through the rectifier hole, resulting in a low-rotation and low-turbulence flow field for the airflow exiting the air inlet shroud. This reduces the probability of vortex backflow zones forming inside the fan and solves the problem of turbulent noise generated by the fresh air module.

Description

Technical Field

[0001] This application belongs to the field of air conditioner technology, and particularly relates to air inlet covers, fresh air modules and air conditioners. Background Technology

[0002] Fresh air conditioning systems utilize fresh air modules to introduce outdoor air into indoor spaces, effectively improving indoor air quality and creating a healthier living environment for users. However, when turbulent outdoor air enters the fan inside the fresh air module, it can easily form a vortex recirculation zone inside the fan, causing turbulent noise to be generated by the fresh air module.

[0003] Therefore, improvements to existing technologies are necessary.

[0004] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0005] This application provides an air inlet hood, a fresh air module, and an air conditioner to solve the problem of turbulent noise generated by the fresh air module.

[0006] In a first aspect, this application provides an air inlet shroud, including a shroud body and a rectifier. The shroud body is recessed with a rectifier groove, and the rectifier is disposed in the rectifier groove. The rectifier has at least one rectifier hole, and the size of the at least one rectifier hole gradually increases along the opening direction of the rectifier hole (21).

[0007] In one possible implementation, the inclination angle of the sidewall of the rectifier hole is α, where 2.5°≤α≤5°.

[0008] In one possible implementation, the rectifier includes a plurality of rectifier sections, which are sequentially disposed within the rectifier slot, and each rectifier section has a rectifier hole.

[0009] In one possible implementation, a plurality of the rectifier sections are spaced apart within the rectifier slot, and a mixing cavity is formed between adjacent rectifier sections.

[0010] In one possible implementation, the aperture ratio of the plurality of rectifiers gradually increases along the opening direction of the rectifier slot.

[0011] In one possible implementation, the rectifier has a protrusion on the side near the bottom of the rectifier slot, and the rectifier hole passes through the protrusion.

[0012] In one possible implementation, a rectification cavity is formed between the rectifier and the bottom of the rectification groove, and an air inlet communicating with the rectification cavity is provided on the cover, and the rectification hole is communicating with the rectification cavity.

[0013] In one possible implementation, the rectifier hole is any one of a circular hole, an elliptical hole, a square hole, or a regular hexagonal hole.

[0014] Secondly, embodiments of this application also provide a fresh air module, the fresh air module including the air inlet hood as described in any of the preceding claims.

[0015] Thirdly, embodiments of this application also provide an air conditioner, which includes the fresh air module as described above.

[0016] Compared with the prior art, this application has the following beneficial effects:

[0017] The air inlet hood provided in this application embodiment has a rectifier installed inside the hood, and a rectifier hole is opened on the rectifier. This forces the turbulent airflow entering the hood to pass through the rectifier hole. After the turbulent airflow collides with the hole wall, it changes its flow direction, thereby rectifying the turbulent airflow. Furthermore, by gradually increasing the size of the rectifier hole along the opening direction of the rectifier slot, the flow velocity of the turbulent airflow decreases after passing through the rectifier hole. This results in the airflow exiting the air inlet hood having a low vortex and low turbulence flow field, thereby reducing the probability of forming a vortex backflow zone inside the fan and solving the problem of turbulent noise generated by the fresh air module. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0020] Figure 1 This is a schematic diagram of the assembly structure of the air inlet shroud provided in an embodiment of this application.

[0021] Figure 2 This is a partial cross-sectional view of the air inlet shroud provided in an embodiment of this application.

[0022] Figure 3 A partial cross-sectional view of the rectifier provided in an embodiment of this application.

[0023] Figure 4This is a schematic diagram of the structure of the rectifier provided in an embodiment of this application.

[0024] Figure 5 This is a schematic diagram of the structure of the fresh air module provided in an embodiment of this application.

[0025] In the diagram: 1. Cover; 11. Rectifier slot; 12. Air inlet; 2. Rectifier component; 21. Rectifier hole; 22. Protrusion; 3. Filter assembly; 4. Fan; 5. Volute. Detailed Implementation

[0026] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0027] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0029] This application provides an air inlet hood, a fresh air module, and an air conditioner to solve the problem of turbulent noise generated by the fresh air module. The following description will be provided in conjunction with the accompanying drawings.

[0030] Please see Figure 1 and Figure 2 This application provides an air inlet hood, including a hood body 1 and a rectifier 2. The hood body 1 is recessed with a rectifier groove 11, and the rectifier 2 is disposed in the rectifier groove 11. The rectifier 2 is provided with at least one rectifier hole 21, and the size of the at least one rectifier hole 21 gradually increases along the opening direction of the rectifier hole 21.

[0031] By installing a rectifier 2 inside the shroud 1 and opening a rectifier hole 21 on the rectifier 2, the turbulent airflow entering the shroud 1 is required to pass through the rectifier hole 21. After the turbulent airflow collides with the hole wall of the rectifier hole 21, its flow direction is changed, thereby achieving the rectification of the turbulent airflow. Furthermore, by gradually increasing the size of the rectifier hole 21 along the opening direction of the rectifier slot 11, the flow velocity of the turbulent airflow decreases after passing through the rectifier hole 21, thereby giving the airflow exiting the air inlet shroud a flow field with low vortex and low turbulence, thus reducing the probability of forming a vortex backflow zone inside the fan 4 and solving the problem of turbulent noise generated by the fresh air module.

[0032] Please see Figure 1 and Figure 2 In this embodiment, an air inlet 12 is integrally formed on the cover 1, and the air inlet 12 communicates with the rectifier groove 11 so that external airflow can enter the rectifier groove 11 through the air inlet 12. A rectifier cavity is formed between the rectifier 2 and the bottom of the rectifier groove 11. The rectifier 2 is plate-shaped, and multiple rectifier holes 21 are opened on the rectifier 2. The multiple rectifier holes 21 are spaced apart on the rectifier 2, and all of the multiple rectifier holes 21 penetrate the rectifier 2 along the thickness direction and communicate with the rectifier cavity so that the internal airflow flowing into the rectifier cavity can flow out of the cover 1 through the rectifier holes 21. In this embodiment, the rectifier holes 21 are regular hexagonal holes so that the rectifier 2 forms a honeycomb structure. In some embodiments of this application, the rectifier holes 21 are any one of circular holes, elliptical holes, or square holes.

[0033] Please see Figure 1 and Figure 3 The size of the rectifier orifice 21 gradually increases along the opening direction of the rectifier groove 11. Specifically, the wall of the rectifier orifice 21 is inclined relative to the core axis of the rectifier orifice 21, and the inclination angle of the sidewall of the rectifier orifice 21 is α, where 2.5°≤α≤5°. In this embodiment, the value of α is 5°. In some embodiments of this application, the value of α is any one of 2.5°, 3°, 3.5°, 4°, and 4.5°. By ensuring that 2.5°≤α≤5°, not only can the flow velocity of the airflow through the rectifier orifice 21 be reduced, but the opening ratio of the rectifier 2 can also be ensured.

[0034] Please see Figure 1 and Figure 4 In some embodiments of this application, a protrusion 22 is provided on the side of the rectifier 2 near the bottom of the rectifier trough 11, and a rectifier hole 21 penetrates the protrusion 22. The protrusion 22 is used to change the distance between the rectifier 2 and the bottom of the rectifier trough 11. The noise generated at the fan 4 can enter the rectifier cavity through the rectifier hole 21. The sound wave energy is absorbed after multiple reflections by the cavity wall of the rectifier cavity. Different distances between the rectifier 2 and the bottom of the rectifier trough 11 can improve the absorption effect of the cavity wall of the rectifier cavity on noise of different frequencies, thereby improving the noise reduction effect of the air inlet shroud.

[0035] In some embodiments of this application, the rectifier 2 includes multiple rectifier sections, which are sequentially spaced along the opening direction of the rectifier groove 11. A mixing chamber is formed between adjacent rectifier sections. The mixing chamber is used to perform secondary mixing of the airflow passing through the rectifier section, which helps to improve the uniformity of the flow field of the airflow exiting the air inlet shroud. Each rectifier section is provided with multiple rectifier holes 21. Different rectifier sections have different opening ratios. Specifically, in some embodiments, the opening ratio of the multiple rectifier sections gradually increases along the opening direction of the rectifier groove 11, so that the flow velocity of the airflow can be gradually reduced, which helps to improve the uniformity of the flow field of the airflow exiting the air inlet shroud.

[0036] Please see Figure 5 This application also provides a fresh air module, which includes an air inlet hood as described above, a filter assembly 3, a fan 4, and a volute 5. The fan 4 is disposed inside the volute 5, and the filter assembly 3 is disposed at the air inlet 12 of the volute 5. The air outlet of the air inlet hood is directly opposite the air inlet 12 of the volute 5, so that the airflow exiting the air inlet hood can enter the fan 4 after passing through the filter assembly 3. Since this fresh air module has the aforementioned air inlet hood, it has at least some or all of the beneficial effects of the aforementioned air inlet hood, which will not be described in detail here.

[0037] This application also provides an air conditioner that includes the fresh air module described above. Since this air conditioner has the aforementioned fresh air module, it possesses at least some or all of the beneficial effects of the aforementioned fresh air module, which will not be elaborated upon here.

[0038] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0039] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. An air inlet hood, characterized in that, The device includes a cover (1) and a rectifier (2). The cover (1) is recessed with a rectifier groove (11). The rectifier (2) is disposed in the rectifier groove (11). The rectifier (2) has at least one rectifier hole (21). The size of the at least one rectifier hole (21) gradually increases along the opening direction of the rectifier hole (21).

2. The air inlet hood according to claim 1, characterized in that, The inclination angle of the sidewall of the rectifier hole (21) is α, where 2.5°≤α≤5°.

3. The air inlet hood according to claim 1, characterized in that, The rectifier (2) includes multiple rectifier sections, which are sequentially arranged in the rectifier slot (11), and each rectifier section is provided with a rectifier hole (21).

4. The air inlet hood according to claim 3, characterized in that, Multiple rectifier sections are spaced apart in the rectifier slot (11), and a mixing cavity is formed between adjacent rectifier sections.

5. The air inlet hood according to claim 3, characterized in that, The aperture ratio of the plurality of rectifiers gradually increases along the opening direction of the rectifier groove (11).

6. The air inlet hood according to claim 1, characterized in that, The rectifier (2) has a protrusion (22) on the side near the bottom of the rectifier groove (11), and the rectifier hole (21) passes through the protrusion (22).

7. The air inlet hood according to claim 1, characterized in that, A rectification cavity is formed between the rectifier (2) and the bottom of the rectification groove (11). An air inlet (12) communicating with the rectification cavity is provided on the cover (1). The rectification hole (21) is communicating with the rectification cavity.

8. The air inlet hood according to claim 1, characterized in that, The rectifier hole (21) can be any one of a circular hole, an elliptical hole, a square hole, or a regular hexagonal hole.

9. A fresh air module, characterized in that, The fresh air module includes the air inlet hood as described in any one of claims 1-8.

10. An air conditioner, characterized in that, The air conditioner includes the fresh air module as described in claim 9.

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