Air guide structure, air conditioner indoor unit and air conditioner

Abstract

The present invention discloses an air guide structure, an air conditioner indoor unit and an air conditioner. The air guide structure includes a volute, an air duct is formed in the volute, the volute has an air outlet top wall and an air outlet bottom wall arranged opposite to each other, an air outlet connected to the air duct is formed between the air outlet top wall and the air outlet bottom wall; and an air guide member is also included, the air guide member is arranged at the air outlet, and an air guide inlet and an air guide outlet are formed, the air guide inlet is connected to the air duct, and an air passage formed between the air guide inlet and the air guide outlet allows the airflow entering from the air guide inlet and flowing out from the air guide outlet to be transmitted to one side of the air outlet bottom wall. The technical solution of the present invention adopts the method of arranging an air guide member at the air outlet of the volute to transmit the airflow near the top of the air outlet to the air outlet bottom wall, effectively preventing the airflow backflow at the air outlet bottom wall when the airflow is small, thereby effectively preventing the airflow backflow phenomenon at the air outlet, ensuring the smoothness and stability of the air outlet, and effectively solving the abnormal sound problem of air outlet surging.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, and in particular to an air guide structure, an air conditioner indoor unit and an air conditioner. Background Art

[0002] After the air conditioner indoor unit has been used for a period of time, dust will accumulate on the filter. When the user turns on the air conditioner for a long time at night, the user usually adjusts it to a low wind gear. Due to the dust accumulation on the filter, the air inlet area becomes smaller, resulting in a smaller air flow. The pressure below the air outlet of the air conditioner indoor unit becomes smaller, and a negative pressure is formed at the air outlet, causing external air to flow back into the air duct, resulting in an unsmooth air outlet and surging (i.e., intermittent) phenomenon, which causes noise and disturbs the user's sleep. Summary of the invention

[0003] The main purpose of the present invention is to provide an air guide structure, aiming to solve the problem of unsmooth air outlet and surging caused by dust accumulation on the filter screen of an air conditioner indoor unit.

[0004] To achieve the above-mentioned purpose, the present invention proposes an air guide structure, including a volute, an air duct is formed in the volute, the volute has an air outlet top wall and an air outlet bottom wall arranged relatively to each other, an air outlet connected to the air duct is formed between the air outlet top wall and the air outlet bottom wall, and also includes an air guide member, which is arranged at the air outlet and forms an air guide inlet and an air guide outlet, the air guide inlet is connected to the air duct, and an air passage formed between the air guide inlet and the air guide outlet allows the airflow entering from the air guide inlet and flowing out from the air guide outlet to be transmitted to the side of the air outlet bottom wall.

[0005] Optionally, the air guide member is arranged on the air outlet top wall or the air outlet bottom wall.

[0006] Optionally, there is one air guide member, which is arranged across the air outlet along the length direction of the air outlet.

[0007] Optionally, there are two air guides, which are respectively arranged at the left and right ends of the air outlet.

[0008] Optionally, the volute is provided with a volute tongue, the volute tongue is connected to the air outlet top wall, and the air guide is arranged on the air outlet bottom wall and opposite to the volute tongue.

[0009] Optionally, the volute is provided with a volute tongue, the volute tongue is connected to the air outlet top wall, and the air guide is arranged on the air outlet top wall and close to the volute tongue.

[0010] Optionally, the air guide is detachably connected to the air outlet top wall or the air outlet bottom wall.

[0011] Optionally, the air outlet top wall or the air outlet bottom wall is provided with a mounting seat, the air guide member is provided with a buckle, and the buckle of the air guide member is connected to the mounting seat.

[0012] Optionally, the air guide member includes a mounting base plate and an air guide panel connected to the mounting base plate, an air passage having an air guide inlet and an air guide outlet is formed between the mounting base plate and the air guide panel, the buckle is connected to the mounting base plate, the mounting seat is provided with a snap-fitting portion that cooperates with the buckle, and the air guide member is snapped onto the mounting seat through the buckle.

[0013] Optionally, the wind guide panel is planar or arc-shaped.

[0014] Optionally, the cross-sectional area of ​​the air guide inlet is larger than the cross-sectional area of ​​the air guide outlet.

[0015] Optionally, the height of the air guide inlet is greater than the height of the air guide outlet.

[0016] Optionally, the height of the air guide inlet is greater than the height of the air guide outlet, the length of the air guide inlet is ≥20 mm, and the distance between the air guide inlet and the air guide outlet is greater than or equal to 6 mm.

[0017] The present invention also provides an air conditioner indoor unit, comprising the above-mentioned air guide structure.

[0018] The present invention also proposes an air-conditioning indoor unit, comprising the above-mentioned air guide structure, and the air guide member is arranged on the bottom wall of the air outlet; the volute is provided with a volute tongue, and the volute tongue is connected to the top wall of the air outlet, and a plurality of louvers arranged at intervals along the length direction of the air outlet are provided on the top wall of the air outlet near the volute tongue, and the air guide member is arranged below the louver.

[0019] The technical solution of the present invention adopts an air guide member arranged at the air outlet of the volute to transmit the airflow near the top of the air outlet to the bottom wall of the air outlet, effectively preventing the backflow of airflow at the bottom wall of the air outlet when the airflow is small, thereby effectively preventing the backflow of airflow at the air outlet, ensuring the smoothness and stability of the air outlet, and effectively solving the problem of abnormal noise caused by air outlet surging. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 This is a schematic structural diagram of a first embodiment of an air conditioner indoor unit of the present invention;

[0022] Figure 2It is a cross-sectional structural diagram of a first embodiment of an air-conditioning indoor unit of the present invention (a cross-sectional view perpendicular to the length direction of the air-conditioning indoor unit);

[0023] Figure 3 for Figure 2 Middle partial enlarged picture;

[0024] Figure 4 This is a schematic diagram of the structure of the air guide member in the first embodiment of the present invention;

[0025] Figure 5 1 is a cross-sectional structural diagram of an air guide member in a first embodiment of the present invention (a cross-sectional view perpendicular to the length direction of the air guide member);

[0026] Figure 6 This is a schematic structural diagram of a second embodiment of an air conditioner indoor unit of the present invention;

[0027] Figure 7 It is a front view of a second embodiment of an air conditioner indoor unit of the present invention;

[0028] Figure 8 for Figure 7 Middle AA section view;

[0029] Fig. 9 for Figure 8 Partial cross-sectional view;

[0030] Fig.10 It is a schematic diagram of the assembly structure of the air guide member and the volute in the second embodiment of the present invention;

[0031] Fig.11 for Fig.10 Middle BB section view;

[0032] Fig.12 for Fig.11 Middle CC section view;

[0033] Fig.13 Schematic diagram of the assembly structure of the volute and the air guide member in the second embodiment of the present invention (from another perspective);

[0034] Fig.14 It is a schematic diagram of a partial three-dimensional structure of a volute in the second embodiment of the present invention;

[0035] Fig.15 This is a schematic diagram of the three-dimensional structure of one of the air guide members in the second embodiment of the present invention (the structure of the other member is the same and will not be repeated);

[0036] Fig.16 Schematic diagram of the cross-sectional structure of one of the air guide members in the second embodiment of the present invention (a cross-sectional view perpendicular to the length direction of the air guide member);

[0037] Description of Figure Numbers:

[0038]

[0039]

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The present invention proposes an air guide structure, which includes a volute, an air duct is formed in the volute, the volute has an air outlet top wall and an air outlet bottom wall arranged opposite to each other, an air outlet connected to the air duct is formed between the air outlet top wall and the air outlet bottom wall, and also includes an air guide member, which is arranged at the air outlet and forms an air guide inlet and an air guide outlet, the air guide inlet is connected to the air duct, and an air passage formed between the air guide inlet and the air guide outlet allows the airflow entering from the air guide inlet and flowing out from the air guide outlet to be transmitted to one side of the air outlet bottom wall. The air guide structure is applied to an indoor unit of an air conditioner to improve the problem of unsmooth air outlet and surging caused by dust accumulation on the filter screen of the indoor unit of the air conditioner.

[0046] In order to more fully illustrate the air guide structure, a detailed description is given below in conjunction with the air conditioner indoor unit.

[0047] The present invention also provides an air conditioner indoor unit with an air guide structure.

[0048] like Figures 1 to 5 , is a first embodiment of an air conditioner indoor unit, the air conditioner indoor unit includes an air guide structure, the air guide structure includes a volute 200, a wind wheel 510 is arranged in the volute, an air duct is formed in the volute 200, the volute 200 has an air outlet top wall 212 and an air outlet bottom wall 211 arranged oppositely, an air outlet 210 connected to the air duct is formed between the air outlet top wall 212 and the air outlet bottom wall 211; it also includes an air guide member 300, the air guide member 300 is arranged on the air outlet bottom wall 211, the volute 200 is provided with a volute tongue 220, connected to the air outlet top wall 212 and the air outlet bottom wall 211. Wall 212, a plurality of louvers 410 arranged at intervals along the length direction of the air outlet are provided at the top wall portion of the air outlet close to the volute tongue 220, the air guide member 300 is arranged below the louver 410 (opposite to the volute tongue 220), the air guide member 300 is formed with an air guide inlet 304 and an air guide outlet 305, the air guide inlet 304 is connected to the air duct, and an air passage formed between the air guide inlet 304 and the air guide outlet 305 allows the airflow entering from the air guide inlet 304 and flowing out from the air guide outlet 305 to be transmitted to the side of the air outlet bottom wall 211.

[0049] After the air conditioner indoor unit has been used for a long time, dust will accumulate on its filter, which will reduce the air intake area. If the air conditioner indoor unit is in low wind gear (such as adjusting it to low wind gear at night), the air intake volume is small due to the two factors, which will lead to a smaller air flow at the outlet. The air flow cannot fill the area below the air outlet, and negative pressure is easily formed below the air outlet. The external air flow will easily flow back into the air duct of the air conditioner indoor unit, resulting in unsmooth air flow and surging. Furthermore, the air flow of the air conditioner indoor unit is driven by the impeller placed in the volute, and the amount of air discharged from the air outlet of the volute (the air outlet of the air conditioner indoor unit) gradually decreases from the top of the air outlet to the bottom. Therefore, the air volume below the air outlet of the volute is the lowest, and this part is also the most likely to form negative pressure. Therefore, an air guide is provided on the air outlet bottom wall of the volute (of course, it is not limited to the air outlet bottom wall, and can be located on the air outlet top wall or between the air outlet top wall and the air outlet bottom wall), and air enters from the air guide inlet and flows out from the air guide outlet. The air entering the air guide is transferred to the side of the air outlet bottom wall, thereby compensating for the amount of air below the air outlet and avoiding the formation of negative wind pressure below the air outlet. The air guide transfers part of the air flowing upward downward. Since the amount of air above the air outlet is large and the pressure is also large, after part of the air is transferred downward, negative wind pressure will not be formed above the air outlet. Through the above scheme, the problem of unsmooth air outlet and surging caused by dust accumulation on the filter of the air conditioner indoor unit is improved.

[0050] Furthermore, if Figures 1 to 3 As shown, in order to prevent the airflow backflow of the air conditioner indoor unit to the greatest extent under the condition of low air volume, the air guide 300 is one and is arranged across the air outlet 210 along the length direction of the air outlet 210. By the cross-arrangement of the air guide, the airflow can be supplemented under the entire air outlet to prevent the occurrence of surging.

[0051] Furthermore, if Figure 3 As shown, the volute 200 is provided with a volute tongue 220, and the volute tongue 220 is connected to the air outlet top wall 212, and the air guide pressure piece 300 is arranged on the air outlet bottom wall 211 and opposite to the volute tongue 220. The provision of an air guide piece is equivalent to adding an extra obstacle to the air outlet of the volute. When the air guide piece is arranged too deep, the loss of air volume and the noise will increase. When the air guide piece is arranged too far outward, the air cannot be well transmitted to the side of the lower air outlet bottom wall, and the air pressure below the volute air outlet cannot be supplemented, and a negative pressure area will still be formed. When the air guide piece is arranged on the air outlet bottom wall corresponding to the volute tongue, on the one hand, the air above the volute air outlet can be transmitted downward, and on the other hand, the loss of air volume can be avoided, and the noise caused by the provision of the air guide piece can be minimized.

[0052] As mentioned above, dust will accumulate on the filter screen after the air conditioner indoor unit has been used for a period of time, and the air conditioner indoor unit will surge only under low air volume conditions. However, in the case where dust does not accumulate on the filter screen, the air guide member may not be provided in theory. Therefore, in this embodiment, further, the air guide member 300 is detachably connected to the air outlet bottom wall 211. The detachable connection method reduces the manufacturing difficulty, and the air guide member can be removed when there is no surge in the air conditioner indoor unit, and installed when there is a surge in the air conditioner indoor unit.

[0053] Furthermore, there are many ways of detachable connection, such as by bonding and screw fastening, but the above methods all have many disadvantages. For example, by bonding, a new adhesive needs to be used each time, and it is difficult to remove; by screw fastening, it is not easy to operate in the narrow space of the air outlet. Therefore. In this embodiment, the air outlet bottom wall 211 is provided with a mounting seat 230, and the air guide 300 is provided with a buckle 303, and the buckle 303 of the air guide 300 is connected to the mounting seat 230. The formation of the buckle fastening makes it convenient to fix the air guide on the mounting seat, and also convenient to remove it from the mounting seat, which is convenient for use.

[0054] Further, the air guide member 300 includes a mounting base plate 301 and an air guide panel 302 connected to the mounting base plate 301, an air passage having an air guide inlet 304 and an air guide outlet 305 is formed between the mounting base plate 301 and the air guide panel 302, the buckle 303 is connected to the mounting base plate, the mounting seat 230 is provided with a snap-on portion (not shown in the figure) that matches the buckle 303, and the air guide member 300 is buckled on the mounting seat 230 through the buckle 303. There are many ways to connect the air guide panel 302 with the mounting base plate 301 to form an air guide channel. In this application, the air guide panel and the mounting base plate are connected by left and right side walls to form an air guide channel. There are no other components that block the airflow between the left and right side walls to reduce resistance. The air enters the air passage of the air guide member from the air guide inlet and then flows out from the air guide outlet. The existence of the air guide member guides part of the airflow, thereby compensating for the pressure below the air outlet.

[0055] Furthermore, the wind guide panel 302 is planar or arc-shaped.

[0056] Furthermore, the cross-sectional area of ​​the air guide inlet 304 is greater than the cross-sectional area of ​​the air guide outlet 305. As described above, the existence of the air guide changes the direction of part of the airflow flowing above the air outlet, thereby compensating for the pressure below the air outlet. In this embodiment, by setting the cross-sectional area of ​​the air guide inlet to be greater than the cross-sectional area of ​​the air guide outlet, the pressure of the airflow entering the air guide through the air channel gradually increases, and the airflow is compressed, further preventing the formation of negative pressure below the air outlet.

[0057] Furthermore, the height of the air guide inlet 304 is greater than the height of the air guide outlet 305. By setting the air guide inlet 304 to a greater height, the airflow flowing to the upper part of the air outlet is more likely to flow into the air passage of the air guide member, and is more likely to form pressurized transmission, thereby compensating for the pressure below the air outlet.

[0058] like Figures 6 to 16 As shown, the second embodiment of the air conditioner indoor unit has a structure similar to that of the first embodiment of the air conditioner indoor unit, except that, in the first embodiment of the air conditioner indoor unit, there is one air guide member, which is arranged across the volute air outlet along the length direction of the volute air outlet, while in this embodiment, there are two air guide members, namely, an air guide member 310 and an air guide member 320, which are arranged at the left and right ends of the volute air outlet 210. Since the technical solution of this embodiment is consistent with the technical solution of the first embodiment except for the above differences, it has at least all the beneficial effects brought by the technical solution of the first embodiment, which will not be repeated here.

[0059] The connection mode of the air guide member 310 and the air guide member 320 to the air outlet bottom wall 211 is consistent with the connection mode of the air guide member 300 and the air outlet bottom wall 211 in the first embodiment. That is, the left and right ends of the air outlet bottom wall 211 are respectively provided with mounting seats 231 and 232, the air guide member 310 is provided with a buckle 313, and the air guide member 320 is provided with a buckle (not shown in the figure), and the air guide member 310 and the air guide member 320 are respectively buckled on the mounting seats 231 and 232.

[0060] The structures of the air guide member 310 and the air guide member 320 are consistent with the air guide member 300 in the first embodiment. The air guide member 310 is used for illustration: the air guide member 310 includes a mounting base plate 311 and an air guide panel 312 connected to the mounting base plate 311, and an air passage having an air guide inlet 314 and an air guide outlet 315 is formed between the mounting base plate 311 and the air guide panel 312. The buckle 313 is connected to the mounting base plate 311, and a snap-fitting portion (not shown in the figure) cooperating with the buckle 313 is provided on the mounting seat 231. The air guide member 310 is snap-fitted to the mounting seat 231 through the buckle.

[0061] The reason for the above arrangement is that the air volume at the left and right ends of the air outlet (volute air outlet) of the air conditioner indoor unit is lower than that in the middle of the air outlet, and the air volume at both ends of the air outlet gradually decreases from the top of the air outlet to the bottom. In other words, the lower parts at both ends of the air outlet of the air conditioner indoor unit are most likely to have negative pressure at the outlet. Since it is not easy to form negative pressure at the outlet in the middle of the air outlet, the air guide is set at both ends of the air outlet. On the premise of preventing the formation of negative pressure at the outlet, it can also reduce the air outlet resistance and reduce the cost, taking into account both the air outlet and efficiency.

[0062] Furthermore, the height of the air guide inlet is greater than the height of the air guide outlet, and the length L of the air guide inlet is ≥20 mm, and the distance between the air guide inlet and the air guide outlet is greater than ≥6 mm.

[0063] The third embodiment of the air conditioner indoor unit of the present invention is similar to the first embodiment, except that the air guide 300 is arranged on the air outlet top wall 212 and close to the volute tongue 220 (not shown in the figure), that is, the position of the louver 410, and the louver 410 is arranged according to actual needs. Such a structure allows the airflow flowing to the top of the air outlet to almost be guided to the bottom wall of the air outlet. At this time, it is not easy to form a negative pressure above the air outlet due to the airflow of the air guide, and the airflow below the air outlet is also supplemented, and it is also not easy to form a negative pressure.

[0064] The fourth embodiment of the air conditioner indoor unit of the present invention is similar to the second embodiment, except that the air guide member 310 and the air guide member 320 are arranged on the air outlet top wall 212 and close to the volute tongue 220 (not shown in the figure), that is, the position of the louver 410, and the louver 410 is arranged according to actual needs.

[0065] The invention also discloses an air conditioner, comprising an air conditioner indoor unit and the air conditioner indoor unit described above.

[0066] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air guide structure, comprising a volute, wherein an air duct is formed in the volute, wherein the volute has an air outlet top wall and an air outlet bottom wall arranged opposite to each other, wherein an air outlet connected to the air duct is formed between the air outlet top wall and the air outlet bottom wall, wherein: It also includes an air guide member, which is arranged at the air outlet and forms an air guide inlet and an air guide outlet, the air guide inlet is connected to the air duct, and the air passage formed between the air guide inlet and the air guide outlet allows the airflow entering from the air guide inlet and flowing out from the air guide outlet to be transmitted to one side of the air outlet bottom wall; The air guide member comprises a mounting base plate and an air guide panel connected to the mounting base plate, and an air passage having an air guide inlet and an air guide outlet is formed between the mounting base plate and the air guide panel; The cross-sectional area of ​​the air guide inlet is greater than the cross-sectional area of ​​the air guide outlet.

2. The wind guide structure according to claim 1, characterized in that: The air guide member is arranged on the air outlet top wall or the air outlet bottom wall.

3. The wind guide structure according to claim 1 or 2, characterized in that: There is one air guide member, which is arranged across the air outlet along the length direction of the air outlet.

4. The wind guide structure according to claim 1 or 2, characterized in that: There are two air guides, which are respectively arranged at the left and right ends of the air outlet.

5. The wind guide structure according to claim 1, characterized in that: The volute is provided with a volute tongue, and the volute tongue is connected to the air outlet top wall. The air guide is arranged on the air outlet bottom wall and is opposite to the volute tongue.

6. The wind guide structure according to claim 1, characterized in that: The volute is provided with a volute tongue, the volute tongue is connected to the air outlet top wall, and the air guide is arranged on the air outlet top wall and close to the volute tongue.

7. The wind guide structure according to claim 2, characterized in that: The air guide member is detachably connected to the air outlet top wall or the air outlet bottom wall.

8. The wind guide structure according to claim 7, characterized in that: The air outlet top wall or the air outlet bottom wall is provided with a mounting seat, and the air guide member is provided with a buckle, and the buckle of the air guide member is connected to the mounting seat.

9. The wind guide structure according to claim 8, characterized in that: The buckle is connected to the mounting base plate, the mounting seat is provided with a snap-fitting portion that matches the buckle, and the air guide is buckled on the mounting seat through the buckle.

10. The wind guide structure according to claim 9, characterized in that: The air guide panel is planar or arc-shaped.

11. The wind guide structure according to claim 1 or 2, characterized in that: The height of the air guide inlet is greater than the height of the air guide outlet.

12. The wind guide structure according to claim 4, characterized in that: The height of the air guide inlet is greater than the height of the air guide outlet, the length of the air guide inlet is ≥20 mm, and the distance between the air guide inlet and the air guide outlet is greater than or equal to 6 mm.

13. An air conditioner indoor unit, characterized in that: The invention comprises the wind guiding structure according to any one of claims 1 to 12.

14. An air conditioner indoor unit, characterized in that: It comprises the wind guide structure described in any one of claims 1 to 12, and the wind guide member is arranged on the bottom wall of the air outlet; the volute is provided with a volute tongue, the volute tongue is connected to the top wall of the air outlet, and a plurality of louvers arranged at intervals along the length direction of the air outlet are provided on the top wall of the air outlet near the volute tongue, and the wind guide member is arranged below the louver.

15. An air conditioner, characterized in that: It comprises an air-conditioning outdoor unit and an air-conditioning indoor unit as claimed in claim 13 or 14.

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