Flow guide structure and range hood comprising same

Abstract

The utility model provides a diversion structure and a range hood comprising the same, the diversion structure is used for diversion of airflow flowing into an upper box body fan from a lower box body of the range hood, and the diversion structure is arranged at the joint of the upper box body and the lower box body and located on the side wall, facing the fan, of the upper box body. The flow guide structure comprises a first flow guide part and a second flow guide part, the first flow guide part is tangent to the extension line of the side plate of the lower box body, the first flow guide part extends towards the second flow guide part, and the second flow guide part extends towards the inlet of the fan. By means of the flow guide structure, airflow distribution caused by an overlarge included angle at the joint is reduced, the situation that the distribution is accumulated to form vortexes, and the air inlet resistance is increased for an inlet of the fan is reduced, the air inlet resistance of the fan is correspondingly reduced, the flow of airflow entering the fan is guaranteed, and then the working efficiency of the fan is improved. The first flow guide part is tangent to the extension line of the side plate, the flow guide structure is prevented from shielding the fan inlet, and the air inlet resistance of the fan inlet is prevented from being increased.

Description

Technical Field

[0001] The utility model particularly relates to a flow guide structure and a range hood comprising the same. Background Art

[0002] Currently, the upper and lower housings of range hoods are commonly joined directly together using two panels, resulting in a large angle at the transition. As fluid flows from the lower housing into the upper housing, it often separates at the junction, increasing flow resistance and reducing the fan system's airflow and efficiency. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the connection between the upper and lower boxes has too large resistance to air flow, and to provide a flow guide structure and a range hood including the same.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A guide structure is provided, which is used to guide the airflow from the lower box of a self-priming range hood into the fan in the upper box. The guide structure is arranged at the connection between the upper box and the lower box, and is located on the side wall of the upper box facing the fan. The guide structure includes a first guide part and a second guide part. The first guide part is tangent to the extension line of the side panel of the lower box and the first guide part extends toward the second guide part, and the second guide part extends toward the inlet of the fan.

[0006] In this solution, a flow guide structure is provided at the connection between the upper and lower boxes. The first flow guide portion and the second flow guide portion are used to guide the airflow from the lower box into the upper box to the fan inlet. This allows the flow guide structure to reduce the airflow diversion caused by the excessive angle at the connection, thereby reducing the accumulation of diversion into vortices and increasing the intake resistance at the fan inlet. The fan intake resistance is correspondingly reduced, ensuring the airflow flow entering the fan, thereby improving the working efficiency of the fan. In addition, the first flow guide portion is arranged tangent to the extension line of the side panel to avoid increasing the intake resistance of the fan inlet when the first flow guide portion protrudes from the extension line. At the same time, it prevents the flow guide structure from blocking the fan inlet, thereby ensuring the air intake volume of the fan.

[0007] Preferably, the first guide portion is arranged at an angle α1 with respect to the side wall direction perpendicular to the upper box body, and the side plate of the lower box body is arranged at an angle β with respect to the side wall direction perpendicular to the upper box body, and α1 is greater than β.

[0008] In this solution, the above arrangement allows the airflow entering the upper box through the lower box to be guided by the first guide portion at the connection between the upper and lower boxes, thereby reducing the airflow diversion here and allowing the airflow to smoothly transition into the upper box and flow into the fan inlet.

[0009] Preferably, the angle α1 is less than 90°.

[0010] In this solution, the above-mentioned setting is used to reduce the resistance of the airflow entering the fan inlet while ensuring the airflow guidance effect, thereby improving the air intake efficiency of the fan.

[0011] Preferably, the second air guide portion is arranged to be inclined from a direction parallel to the side wall of the upper box body toward the side wall of the upper box body.

[0012] In this solution, through the above-mentioned setting, when the airflow flows into the second guide part through the first guide part, it simulates the body shape of fish, utilizes the bionic principle to further reduce the airflow resistance, effectively eliminates the vortex in the transition area between the upper and lower boxes, and plays the role of rectification and resistance reduction.

[0013] Preferably, the second air guide portion is arranged at an angle with respect to a direction perpendicular to the side wall of the upper box body, and the angle is α2, and α2 is greater than α1.

[0014] In this solution, the above settings are used to improve the air intake efficiency of the fan.

[0015] Preferably, the angle α2 has a value range of 90°<α2<130°.

[0016] In this solution, the above setting is used to avoid the diversion of airflow caused by the value of α2 being too large.

[0017] Preferably, the first guide portion and the second guide portion have the same extension length, and the length of the first guide portion and the second guide portion ranges from 60 mm to 80 mm.

[0018] In this solution, through the above-mentioned arrangement, the guide structure occupies less space in the upper box body, rationally utilizes the space and meets the requirement of reducing the air intake resistance of the fan.

[0019] Preferably, the guide structure further includes a connecting portion, the connecting portion is used to fit the side wall surface of the upper box body, and the first guide portion and the second guide portion are connected to the side wall of the upper box body through the connecting portion.

[0020] In this solution, through the above-mentioned arrangement, the guide structure can be detachably connected to the side wall of the upper box body through the connecting part, so as to facilitate the installation and disassembly of the guide structure. At the same time, the guide structure can be directly installed in the existing upper box body to reduce the air intake resistance of the fan. The changes to the range hood are small, and the structure is simpler, so that existing models of range hoods can be improved and have greater versatility.

[0021] Preferably, a through hole is provided on the connecting portion, and the connecting portion is screwed to the side wall of the upper box body through a bolt assembly.

[0022] In this solution, the above arrangement is used to achieve a detachable connection between the connecting portion and the side wall of the upper box body.

[0023] A range hood comprises the above-mentioned flow guiding structure.

[0024] In this solution, the range hood includes the above-mentioned flow guide structure, so that the fan inlet resistance of the range hood is further reduced, thereby ensuring the air flow entering the fan, and thus improving the working efficiency of the fan.

[0025] The positive progress of the present invention is that: the present invention provides a flow guide structure at the connection between the upper and lower boxes, wherein the first flow guide portion and the second flow guide portion are used to guide the airflow from the lower box into the upper box to the fan inlet, so that the flow guide structure reduces the airflow diversion caused by the excessive angle at the connection, thereby reducing the accumulation of diversion into vortices and the increase in intake resistance at the fan inlet. The fan intake resistance is correspondingly reduced, ensuring the airflow flow entering the fan, thereby improving the working efficiency of the fan. In addition, the first flow guide portion is arranged tangent to the extension line of the side panel to avoid increasing the intake resistance of the fan inlet when the first flow guide portion protrudes from the extension line, while preventing the flow guide structure from blocking the fan inlet, thereby ensuring the air intake volume of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a three-dimensional diagram of a range hood according to a preferred embodiment of the present invention.

[0027] Figure 2 This is a diagram showing the positional relationship between the upper box and the lower box in a preferred embodiment of the present invention.

[0028] Figure 3 This is a positional relationship diagram of the first guide portion and the second guide portion in a preferred embodiment of the present invention.

[0029] Figure 4 This is a three-dimensional diagram of a diversion structure according to a preferred embodiment of the present invention.

[0030] Figure 5 This is a side view of a flow guide structure according to a preferred embodiment of the present invention.

[0031] Description of reference numerals:

[0032] Range hood 100

[0033] Upper box 10

[0034] Lower box 20

[0035] Side panel 21

[0036] Fan 30

[0037] Diversion structure 40

[0038] First air guide portion 41

[0039] Second air guide portion 42

[0040] Connecting portion 43

[0041] Through hole 431 DETAILED DESCRIPTION

[0042] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0043] This embodiment provides a flow guide structure, the specific structure is as follows Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the range hood 100 includes an upper box body 10 and a lower box body 20. The lower box body 20 is arranged toward the stove to guide the oil smoke generated by the stove into the range hood 100. The oil smoke entering the lower box body 20 is sucked from the upper box body 10 by the fan 30 located in the upper box body 10 and finally discharged from the air outlet of the range hood 100. This is the existing technology and will not be elaborated on here. Among them, the guide structure 40 is used to guide the airflow from the lower box 20 of the self-priming range hood 100 into the upper box 10 fan 30. The guide structure 40 is arranged at the connection between the upper box 10 and the lower box 20, and is located on the side wall of the upper box 10 facing the fan 30. The guide structure 40 includes a first guide part 41 and a second guide part 42. The first guide part 41 is tangent to the extension line of the side panel 21 of the lower box 20 and the first guide part 41 extends toward the second guide part 42, and the second guide part 42 extends toward the inlet of the fan 30.

[0044] Specifically, the first guide portion 41 and the second guide portion 42 are flat plates, and the first guide portion 41 and the second guide portion 42 are connected in sequence, the first guide portion 41 is located between the second guide portion 42 and the side plate 21, and the first guide portion 41 and the second guide portion 42 are correspondingly arranged at the connection between the upper box body 10 and the lower box body 20, so as to guide the airflow entering the upper box body 10 from the lower box body 20 to the inlet of the fan 30 through the first guide portion 41 and the second guide portion 42. Compared with the method of having no guide structure 40 at the connection between the upper box body 10 and the lower box body 20, adding the guide structure 40 can reduce the angle there, thereby reducing the diversion of the airflow when it flows through this place due to the large angle, and avoiding the diversion from accumulating into vortices to increase the intake resistance of the inlet of the fan 30, that is, by adding the guide structure 40 to reduce the intake resistance of the fan 30, the air flow entering the fan 30 is guaranteed, thereby improving the working efficiency of the fan 30.

[0045] In addition, the first guide portion 41 is arranged tangent to the extension line of the side panel 21 to avoid the airflow from the lower box body 20 into the upper box body 10 being affected by the first guide portion 41 when the first guide portion 41 protrudes from the extension line, thereby increasing the air intake resistance at the inlet of the fan 30, preventing the guide structure 40 from blocking the inlet of the fan 30, and ensuring the air intake volume of the fan 30.

[0046] It is understandable that the air guide structure 40 may be a sheet metal part in the prior art, so as to facilitate the processing of the first air guide portion 41 and the second air guide portion 42 .

[0047] In this embodiment, the first guide portion 41 is set at an angle α1 with the side wall direction perpendicular to the upper box body 10, and the side plate 21 of the lower box body 20 is set at an angle β with the side wall direction perpendicular to the upper box body 10, and α1 is greater than β.

[0048] Specifically, the side panel 21 is tilted in the lower box body 20 so that the airflow entering the lower box body 20 can smoothly enter the upper box body 10 as oil smoke during cooking. The tilt angle of the side panel 21 is an angle β along the direction perpendicular to the side wall of the upper box body 10. The first guide portion 41 extends from the connection between the side panel 21 and the side wall of the upper box body 10 toward the inlet of the fan 30, and the first guide portion 41 forms an angle α1 along the direction perpendicular to the side wall of the upper box body 10. The first guide portion 41 can be formed by sheet metal processing to form the above angle. According to test results, when α1 is greater than β, the resistance to the inlet of the fan 30 is reduced more significantly. Therefore, α1 is set to be greater than β, so that the airflow entering the upper box body 10 through the lower box body 20 is guided by the first guide portion 41 at the connection between the upper and lower boxes, thereby reducing the airflow diversion here, so that the airflow smoothly transitions to the upper box body 10 and flows into the inlet of the fan 30. It is understandable that the test results are obtained based on the finite element analysis in the prior art, and this embodiment does not improve it, so it will not be described in detail here.

[0049] It should be noted that according to the test results, when the values of α1 and β are close, the transitional diversion effect of the airflow is better, but this does not include the case where the two are equal.

[0050] Furthermore, in this embodiment, the angle α1 is less than 90°, so as to reduce the resistance of the airflow entering the inlet of the fan 30 while ensuring the airflow guiding effect, thereby improving the air intake efficiency of the fan 30 .

[0051] In this embodiment, the second air guide portion 42 is inclined from a direction parallel to the side wall of the upper box body 10 toward the side wall of the upper box body 10 .

[0052] Specifically, the second guide portion 42 extends from the first guide portion 41 away from the connection between the side wall of the upper housing 10 and the side panel 21 toward the inlet of the fan 30. Compared to the arrangement of the second guide portion 42 parallel to the side wall of the upper housing 10, the second guide portion 42, which is tilted toward the side wall of the upper housing 10, forms a certain angle with the first guide portion 41 to simulate the shape of a fish, especially the shape of the fish's head to the fin section. Utilizing the bionic principle, the first guide portion 41 and the second guide portion 42 are connected to form a guide structure 40 similar to the shape of the fish's head to the fin section, thereby further reducing fluid resistance. When the airflow flows through the first guide portion 41 and into the second guide portion 42, it effectively eliminates vortices in the transition area between the upper and lower housings, thereby achieving the effects of flow rectification and resistance reduction.

[0053] Of course, in other embodiments, the second air guide portion 42 may also be arranged parallel to the side wall of the upper box body 10, which can also meet the requirement of reducing the inlet resistance of the fan 30, and will not be elaborated here.

[0054] In this embodiment, the second air guide portion 42 is arranged at an angle α2 with respect to the side wall perpendicular to the upper housing 10, and α2 is greater than α1. The value range of the angle α2 is 90°<α2<130°. By limiting the value range of α2, the diversion of the airflow caused by an excessively large value of α2 is avoided. At the same time, the air intake efficiency of the fan 30 is effectively improved. The above-mentioned value range of α2 is also obtained through finite element analysis in the prior art and will not be elaborated on here.

[0055] In this embodiment, the first guide portion 41 and the second guide portion 42 have the same extension length, and the length of the first guide portion 41 and the second guide portion 42 ranges from 60 mm to 80 mm.

[0056] Specifically, the first and second guide portions 41, 42 have the same extended length, resulting in the planar plate formed by the first and second guide portions 41, 42 having the same area. This is superior to situations where the first guide portion 41 extends longer than the second guide portion 42, or vice versa. Test results show that both of these situations are superior to situations where the extended lengths are unequal. Furthermore, the lengths of the first and second guide portions 41, 42 are within a range of 60-80 mm, allowing the guide structure 40 to be installed within the limited space within the upper housing 10, effectively utilizing the space and reducing the air intake resistance of the fan 30.

[0057] In this embodiment, the guide structure 40 further includes a connecting portion 43 , which is used to fit the side wall surface of the upper box body 10 . The first guide portion 41 and the second guide portion 42 are connected to the side wall of the upper box body 10 via the connecting portion 43 .

[0058] Specifically, the connecting portion 43 is a flat plate material, and the extending direction of the connecting portion 43 is the same as the side wall of the upper box body 10. The connecting portion 43 is attached to the side wall of the upper box body 10, and one side of the connecting portion 43 is connected to the first guide portion 41, that is, the guide structure 40 includes the connecting portion 43, the first guide portion 41, and the second guide portion 42 connected in sequence. Compared with the method of connecting to the side wall of the upper box body 10 through the first guide portion 41, the additional connecting portion 43 can be formed with the first guide portion 41 and the second guide portion 42, and form the angles α1 and α2 through sheet metal processing. The connecting portion 43 can be connected to the side wall of the upper box body 10 by bonding, so that the guide structure 40 can be detachably connected to the side wall of the upper box body 10 through the connecting portion 43, which facilitates the installation and removal of the guide structure 40.

[0059] At the same time, the guide structure 40 can be directly installed in the existing upper box 10 to reduce the air intake resistance of the fan 30. The changes to the range hood 100 are small, and the structure is simpler, so that existing models of range hoods 100 can be improved and have greater versatility.

[0060] Furthermore, a through hole 431 is defined in the connecting portion 43 , and the connecting portion 431 is screwed to the side wall of the upper box body 10 via a bolt assembly.

[0061] Specifically, the through hole 431 is a circular hole or a stepped hole, and a threaded hole is provided on the side wall of the upper box body 10 corresponding to the through hole 431, and a bolt is passed through the through hole 431 and screwed into the threaded hole to realize a detachable connection between the connecting part 43 and the side wall of the upper box body 10.

[0062] Of course, the side wall of the upper box body 10 may not be provided with threaded holes, and the bolt assembly may be a self-tapping screw of the prior art, so that the self-tapping screw is inserted into the through hole 431 and then screwed to the side wall of the upper box body 10 by the self-tapping screw, thereby realizing the setting of the guide structure 40 at the connection between the upper and lower boxes.

[0063] This embodiment further provides a range hood 100 including the aforementioned air guide structure 40. The range hood 100 includes the aforementioned air guide structure 40 to further reduce inlet resistance at the fan 30 of the range hood 100, thereby ensuring a high airflow rate entering the fan 30 and improving the operating efficiency of the fan 30.

[0064] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A flow guide structure for guiding the airflow from the lower box of a self-priming range hood to the fan in the upper box, characterized in that: The guide structure is arranged at the connection between the upper box body and the lower box body, and is located on the side wall of the upper box body facing the fan. The guide structure includes a first guide part and a second guide part. The first guide part is tangent to the extension line of the side panel of the lower box body and the first guide part extends toward the second guide part, and the second guide part extends toward the inlet of the fan.

2. The flow guide structure according to claim 1, wherein: The first guide portion is set at an angle α1 with the side wall direction perpendicular to the upper box body, and the side plate of the lower box body is set at an angle β with the side wall direction perpendicular to the upper box body, and α1 is greater than β.

3. The flow guide structure according to claim 2, wherein: The angle α1 is less than 90°.

4. The flow guide structure according to claim 1, wherein: The second air guide portion is inclined from a direction parallel to the side wall of the upper box body toward the side wall of the upper box body.

5. The flow guide structure according to claim 2, wherein: The second air guide portion is arranged at an angle with respect to a direction perpendicular to the side wall of the upper box body, and the angle is α2, and α2 is greater than α1.

6. The flow guide structure according to claim 5, characterized in that: The value range of the angle α2 is 90°<α2<130°.

7. The flow guide structure according to claim 1, wherein: The first guide portion and the second guide portion have the same extension length, and the length of the first guide portion and the second guide portion ranges from 60 mm to 80 mm.

8. The flow guide structure according to claim 1, wherein: The guide structure further includes a connecting portion, which is used to fit the side wall surface of the upper box body. The first guide portion and the second guide portion are connected to the side wall of the upper box body through the connecting portion.

9. The flow guide structure according to claim 8, characterized in that: A through hole is provided on the connecting portion, and the connecting portion is screwed to the side wall of the upper box body through a bolt assembly.

10. A range hood, characterized in that: The range hood comprises the flow guide structure according to any one of claims 1 to 9.

Images