Tabletop range hood

Abstract

The table top range hood comprises a machine body and a draught fan, the machine body is provided with a first flow guide cavity, a second flow guide cavity and a third flow guide cavity which are sequentially communicated, the first flow guide cavity, the second flow guide cavity and the third flow guide cavity are arranged in a U shape, and an inlet of the draught fan is communicated with the third flow guide cavity; oil smoke is suitable for sequentially flowing through the first flow guide cavity, the second flow guide cavity and the third flow guide cavity when the fan works. According to the technical scheme, the first flow guide cavity, the second flow guide cavity and the third flow guide cavity are designed to be arranged in a U shape to form the U-shaped flow channel, the U-shaped flow channel is provided with the corner part, the flowing direction of oil smoke needs to be changed for multiple times in the conveying process, the propagation path of noise is also changed, noise attenuation is achieved, and the noise reduction effect is improved. And therefore, the noise of the table top range hood can be reduced.

Description

Technical Field

[0001] This application relates to the field of range hood technology, and in particular to a desktop range hood. Background Technology

[0002] A range hood, also known as a cooking hood, is a kitchen appliance used to purify the kitchen environment. With the improvement of people's living standards, more and more people are cooking methods such as grilling and hot pot. These cooking methods are usually done not in the kitchen, but at the dining table or outdoors. The resulting fumes cannot be dealt with in time, leading to a poor experience when enjoying food. Desktop range hoods have emerged as a related technology. Desktop range hoods are easy to carry and are typically placed at the dining table or outdoors. However, current desktop range hoods suffer from noise pollution, further reducing the user experience. Summary of the Invention

[0003] This application aims to at least partially solve one of the technical problems in the related art. To this end, this application proposes a desktop range hood.

[0004] To achieve the above objectives, this application discloses a desktop range hood, which includes:

[0005] The fuselage includes a first flow guide cavity, a second flow guide cavity, and a third flow guide cavity connected in sequence, the first flow guide cavity, the second flow guide cavity, and the third flow guide cavity forming a U-shaped arrangement; and

[0006] The fan has an inlet that is connected to the third guide cavity, and the fumes are adapted to flow sequentially through the first guide cavity, the second guide cavity, and the third guide cavity when the fan is working.

[0007] In some embodiments of this application, the first guide cavity is located on one side of the fan in the axial direction, the second guide cavity is located on one side of the fan in the radial direction, and the third guide cavity is located on the other side of the fan in the axial direction.

[0008] In some embodiments of this application, the fuselage includes a first side plate, which is opposite to the inlet of the fan, and the third flow guide cavity is disposed between the first side plate and the fan, with the first side plate protruding toward the fan.

[0009] In some embodiments of this application, along the axial direction of the fan, the position of the first side plate closest to the fan is located between the rotation axis of the fan and the second guide cavity.

[0010] In some embodiments of this application, the first side plate is arc-shaped and protrudes.

[0011] In some embodiments of this application, the minimum distance between the first side plate and the fan along the axial direction of the fan is 20mm to 30mm.

[0012] In some embodiments of this application, the first side plate includes a first plate layer and a second plate layer, and a cavity is provided between the first plate layer and the second plate layer, wherein the cavity is provided with sound-absorbing cotton.

[0013] In some embodiments of this application, the side of the first side panel facing the fan has sound-absorbing cotton.

[0014] In some embodiments of this application, the body includes a handle, and the side of the first side plate opposite to the fan is recessed to form a clearance cavity with the handle.

[0015] In some embodiments of this application, the body includes an oil collection box, which is located below the fan to receive the oil discharged by the fan, and the second guide cavity is located between the fan and the oil collection box.

[0016] In some embodiments of this application, the desktop range hood includes an air inlet hood disposed on the body, the air inlet hood having an air inlet cavity and an air inlet, the air inlet and the air inlet cavity being connected, and the air inlet cavity intersecting and being connected to the first guide cavity.

[0017] The technical solution of this application forms a U-shaped flow channel by arranging the first, second, and third flow channels in a U-shape. The U-shaped flow channel has corners, and the flow direction of the fumes needs to change multiple times during the transmission process, which also changes the propagation path of the noise. This achieves noise attenuation and helps to reduce the noise of the desktop range hood.

[0018] Other advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other designs can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 These are schematic diagrams of a desktop range hood in some embodiments;

[0021] Figure 2 Schematic diagram of a desktop range hood in some embodiments (view and angle) Figure 1 different);

[0022] Figure 3 Side view of a desktop range hood in some embodiments;

[0023] Figure 4 This is a cross-sectional view of a desktop range hood in some embodiments;

[0024] Figure 5 This is a schematic diagram of the oil fume flow from a desktop range hood in some embodiments;

[0025] Figure 6 This is a schematic diagram of the oil fume flow of a desktop range hood in some embodiments (compared to...). Figure 5 (The first side plate protruding towards the fan is missing);

[0026] Figure 7 This is an exploded view of a desktop range hood in some embodiments.

[0027] Explanation of icon numbers:

[0028] Desktop range hood 100, smoke extraction area 101, smoke exhaust area 102, body 1000, first air guide cavity 1001, second air guide cavity 1002, third air guide cavity 1003, first shell 1100, second shell 1200, first side plate 1210, sound-absorbing cotton 1211, clearance cavity 1220, handle 1230, base / oil collection box 1300, top cover 1400, air outlet 1410, air inlet hood 2000, air inlet shell 2100, air inlet 2110, air inlet cavity 2120, air inlet mesh 2200, fan 3000, motor 3100, impeller 3200, volute 3300, oil leak nozzle 3400, first filter 4100, second filter 4200.

[0029] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0034] This application proposes a desktop range hood 100, combined with... Figure 1 , Figure 4 and Figure 5 As shown, in some embodiments, the desktop range hood 100 includes a body 1000 and a fan 3000. The body 1000 is provided with a first guide cavity 1001, a second guide cavity 1002, and a third guide cavity 1003. The first guide cavity 1001, the second guide cavity 1002, and the third guide cavity 1003 are connected in sequence and form a U-shaped arrangement. The inlet of the fan 3000 is connected to the third guide cavity 1003. When the desktop range hood 100 is working, the fumes enter the desktop range hood 100 from the air inlet 2110, and flow sequentially through the first guide cavity 1001, the second guide cavity 1002, and the third guide cavity 1003 before entering the fan 3000 and then being discharged from the fan 3000.

[0035] Specifically, the body 1000 constitutes the skeleton structure of the desktop range hood 100. The body 1000 can be made of metal or plastic, and can be a one-piece structure or a series of separate parts connected together. The fan 3000 can be installed inside or outside the body 1000. The fan 3000 generally includes a volute 3300, a motor 3100, and an impeller 3200. The impeller 3200 is located inside the volute 3300. The motor 3100 is connected to the impeller 3200 for driving. The motor 3100 can drive the impeller 3200 to rotate at high speed. The high-speed rotation of the impeller 3200 causes the fumes to enter the interior of the desktop range hood 100 from the air inlet 2110. The fumes flow sequentially through the first guide cavity 1001, the second guide cavity 1002, and the third guide cavity 1003, and enter the fan 3000 through the inlet. Then, they are discharged from the outlet of the fan 3000 and from the air outlet 1410 of the desktop range hood 100 to the outside.

[0036] The desktop range hood 100 is used in close proximity to the user, and the noise generated during its operation can easily be transmitted to the user, causing discomfort. Therefore, in this embodiment, the first guide cavity 1001, the second guide cavity 1002, and the third guide cavity 1003 are designed in a U-shape to form a U-shaped flow channel. The U-shaped flow channel has corners, and the flow direction of the fumes needs to change multiple times during transmission, which also changes the propagation path of the noise, thus achieving noise attenuation and helping to reduce the noise of the desktop range hood 100. Furthermore, the U-shaped arrangement of the first guide cavity 1001, the second guide cavity 1002, and the third guide cavity 1003 extends the length of the flow channel within a limited space, which also helps to attenuate the noise.

[0037] Furthermore, the U-shaped arrangement of the first guide cavity 1001, the second guide cavity 1002, and the third guide cavity 1003 forms a U-shaped flow channel, extending the path of oil fume transmission and achieving condensation of the oil fume. Combined with the formation of the corner section, this improves the oil fume separation effect before the oil fume reaches the fan 3000 (reducing the content of oil mist particles in the oil fume), preventing the fan 3000 from adhering to more oil and affecting its performance. Generally, a filter screen (the second filter screen 4200 mentioned below) needs to be installed at the air outlet 1410 of the desktop range hood 100 to filter oil fumes. Because the U-shaped flow channel design improves the oil fume separation effect, this extends the service life of the filter screen (second filter screen 4200) and avoids frequent replacements.

[0038] Continue to combine Figure 1 , Figure 4 and Figure 5As shown, in some embodiments, the first guide cavity 1001 is disposed on one side of the fan 3000 in the axial direction, the third guide cavity 1003 is disposed on the other side of the fan 3000 in the axial direction, and the second guide cavity 1002 is disposed on one side of the fan 3000 in the radial direction, such that the second guide cavity 1002 is located between the first guide cavity 1001 and the third guide cavity 1003, one end of the second guide cavity 1002 is connected to the first guide cavity 1001, and the other end of the second guide cavity 1002 is connected to the third guide cavity 1003. With this configuration, the fan 3000 is held in a U-shaped flow channel formed by the first guide cavity 1001, the second guide cavity 1002, and the third guide cavity 1003. While keeping the size of the desktop range hood 100 unchanged, the second guide cavity 1002 utilizes the axial space occupied by the fan 3000, ensuring that the second guide cavity 1002 has a certain length, which is more conducive to noise reduction and condensation of oil fumes. In other words, the second guide cavity 1002 utilizes the axial space occupied by the fan 3000, thereby helping to reduce the size of the desktop range hood 100.

[0039] Combination Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the body 1000 includes a first side plate 1210, the inlet of the fan 3000 is opposite to the first side plate 1210, and a third guide cavity 1003 is disposed between the fan 3000 and the first side plate 1210, with the first side plate 1210 protruding towards the fan 3000. It can be understood that the first guide cavity 1001, the second guide cavity 1002, and the third guide cavity 1003 form a U-shaped arrangement, thus creating a corner between the second guide cavity 1002 and the third guide cavity 1003. When the fumes pass through the corner between the second guide cavity 1002 and the third guide cavity 1003, most of the fumes change direction and enter the fan 3000 through the inlet, and are then discharged. A small portion of the fumes forms a vortex at the corner between the second guide cavity 1002 and the third guide cavity 1003 (see...). Figure 6 Therefore, in this embodiment, the first side plate 1210 opposite to the fan 3000 protrudes towards the direction of the fan 3000. The protruding structure of the first side plate 1210 guides the oil fumes. Since the third guide cavity 1003 is located between the first side plate 1210 and the fan 3000, and the inlet of the fan 3000 is connected to the third guide cavity 1003, the oil fumes are guided along the surface of the first side plate 1210 to the inlet of the fan 3000. This reduces the formation of vortices at the corner between the second guide cavity 1002 and the third guide cavity 1003, thereby further reducing noise.

[0040] Combination Figure 5As shown, in some embodiments, along the axial direction of the fan 3000, the position of the first side plate 1210 closest to the fan 3000 is located between the rotation axis of the fan 3000 and the second guide cavity 1002, thus allowing the fumes to be guided more smoothly to the inlet of the fan 3000. It can be understood that since the first side plate 1210 protrudes towards the fan 3000, there is a position on the first side plate 1210 that is closest to the fan 3000 when measured along the axial direction of the fan 3000. Figure 5 The dot on the first side plate 1210 is positioned between the rotation axis of the fan 3000 and the second guide cavity 1002 (measured in the height direction). This allows the oil fumes flowing along the surface of the first side plate 1210 to be aligned with the inlet of the fan 3000 after leaving the first side plate 1210, so that the oil fumes can enter the fan 3000 more smoothly through the inlet, preventing the oil fumes from escaping and further reducing noise.

[0041] For example Figure 5 The first side plate 1210 is positioned such that the distance between the closest point of the first side plate 1210 to the fan 3000 and the fan 3000 is L (i.e., the minimum distance between the first side plate 1210 and the fan 3000 along the axial direction of the fan 3000). This position is set below the rotation axis of the fan 3000 and above the second guide cavity 1002. When the fumes leave along the first side plate 1210, they can be aligned with the inlet of the fan 3000, so that the fumes can be better guided to the fan 3000 and the noise can be reduced.

[0042] Combination Figure 5 As shown, in some embodiments, along the axial direction of the fan 3000, the minimum distance between the first side plate 1210 and the fan 3000 is L, which satisfies 20mm≤L≤30mm. For example, L is 20mm, 23mm, 25mm, 27mm or 30mm. Through a large number of experiments by the inventors, by optimizing the distance between the first side plate 1210 and the fan 3000, both noise performance and the efficiency of the fan 3000 are taken into account.

[0043] Furthermore, combined Figure 5 As shown, in some embodiments, the first side plate 1210 has an arc-shaped protrusion. Since the first side plate 1210 needs to guide the flow of oil fumes, the arc-shaped protrusion reduces resistance to the oil fumes, allowing them to flow smoothly along the first side plate 1210, reducing turbulence and eddies, thereby reducing noise. The first side plate 1210 can also have a circumferential arc-shaped protrusion, thus achieving rectification and guidance of the oil fumes in the circumferential direction of the first side plate 1210, for example... Figure 5If the first side plate 1210 is a circumferential arc protrusion as shown, it can guide the oil fumes in the up, down, left, and right directions, thereby better guiding the oil fumes to the inlet of the fan 3000 and further reducing noise.

[0044] Combination Figure 4 and Figure 5 As shown, in some embodiments, the first side plate 1210 is provided with sound-absorbing cotton 1211 (the sound-absorbing cotton 1211 is considered as part of the first side plate 1210) facing the fan 3000. By providing the sound-absorbing cotton 1211, the noise generated by the flow of oil fumes can be absorbed, and the noise transmitted from upstream of the fan 3000 along the oil fumes can be absorbed, reducing the noise entering the fan 3000 and further reducing the noise level of the desktop range hood 100.

[0045] Of course, the sound-absorbing cotton 1211 may not be placed on the side of the first side plate 1210 facing the fan 3000. In some embodiments, the first side plate 1210 includes a first plate layer and a second plate layer, and a cavity is formed between the first plate layer and the second plate layer. The sound-absorbing cotton 1211 is placed in the cavity. This arrangement can also achieve a certain noise reduction effect, absorb the echo and vibration of the flow channel wall, and prevent the sound-absorbing cotton 1211 from being contaminated by oil.

[0046] Combination Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the first side plate 1210 is recessed on the side away from the fan 3000, and the body 1000 also includes a handle 1230, with a clearance cavity 1220 formed between the handle 1230 and the side of the first side plate 1210 away from the fan 3000. As described above, the first side plate 1210 needs to protrude towards the fan 3000, that is, the side of the first side plate 1210 facing the fan 3000 protrudes towards the fan 3000. In this embodiment, the side of the first side plate 1210 away from the fan 3000 is recessed, thus forming a cavity on the side of the first side plate 1210 away from the fan 3000. The handle 1230 is located at the opening of the cavity, thereby forming a clearance cavity 1220 between the handle 1230 and the side of the first side plate 1210 away from the fan 3000. When the user holds the handle 1230, the hand can be accommodated in the clearance cavity 1220. Through this setting, the structural feature of the first side plate 1210 protruding towards the fan 3000 is fully utilized. The handle 1230 is provided to give the user a point of leverage when carrying the desktop range hood 100, and the handle 1230 is also prevented from protruding too much. To improve the user's comfort when holding the handle 1230, the width of the handle 1230 is designed to be 30mm to 50mm, which is more in line with the ergonomic design of the human hand. For example, the width of the handle 1230 is 30mm, 40mm or 50mm.

[0047] Combination Figure 4and Figure 5 As shown, in some embodiments, the body 1000 includes an oil collection box 1300, which is located below the fan 3000 and is used to receive the oil discharged from the fan 3000. The second guide cavity 1002 is located between the oil collection box 1300 and the fan 3000. That is, the second guide cavity 1002 is located below the fan 3000 and above the oil collection box 1300. When the desktop range hood 100 is in use, the fan 3000 will be covered with oil. The oil flows downward under the action of gravity. Generally, an oil leakage hole (not shown in the figure) is provided on the volute 3300 of the fan 3000. The oil is discharged from the oil leakage hole and flows to the oil collection box 1300, where it is received and temporarily stored. Since the second guide cavity 1002 is located between the fan 3000 and the oil collection box 1300, when the oil fumes flow through the second guide cavity 1002, the oil fumes are blown over the oil on the oil collection box 1300. The oil can enhance the cooling and solidification of the oil mist particles in the oil fumes, thereby enhancing the separation of oil fumes and more effectively reducing the content of oil mist particles in the oil fumes.

[0048] To avoid noise generated at the oil leakage hole when the fan 3000 is running due to the oil leakage hole on the volute 3300, this embodiment is provided with an oil leakage nozzle 3400. The oil leakage nozzle 3400 is connected to the volute 3300 and extends from the volute 3300 to the oil collection box 1300. Oil is discharged from the oil leakage hole and flows along the oil leakage nozzle 3400 to the oil collection box 1300. Through the cooperation between the oil leakage nozzle 3400 and the oil leakage hole, the noise at the oil leakage hole is effectively reduced or even avoided.

[0049] Combination Figure 4 and Figure 5 As shown, in some embodiments, the desktop range hood 100 includes an air inlet hood 2000, which is disposed on the body 1000. The air inlet hood 2000 is provided with an air inlet cavity 2120 and an air inlet 2110. The air inlet 2110 communicates with the air inlet cavity 2120, and the air inlet cavity 2120 communicates with the first guide cavity 1001. When the fan 3000 is working, the fumes enter the air inlet cavity 2120 from the air inlet 2110 and then flow sequentially through the first guide cavity 1001. 001. The second guide cavity 1002 and the third guide cavity 1003 enter the fan 3000 through the third guide cavity 1003, and are then discharged from the fan 3000 and discharged to the outside through the air outlet 1410 on the body 1000. The air inlet cavity 2120 intersects with the first guide cavity 1001, and the intersection forms a corner between the air inlet cavity 2120 and the first guide cavity 1001. In this way, the U-shaped flow channel can enhance the attenuation of noise and further reduce noise.

[0050] Combination Figure 3As shown, in some embodiments, the air inlet 2110 is connected to the smoke extraction area 101 of the desktop range hood 100, while the air outlet 1410 is connected to the smoke exhaust area 102 of the desktop range hood 100. With the smoke extraction area 101 in the foreground, the smoke exhaust area 102 is located above and behind the smoke extraction area 101. It can be understood that the space that the desktop range hood 100 needs to extract (i.e., the space near the air inlet 2110) is considered the smoke extraction area 101, and the space that the desktop range hood 100 needs to exhaust fumes (i.e., the space near the air outlet 1410) is considered the smoke exhaust area 102. When the fan 3000 is working, the smoke extraction area 101 can form a negative pressure. Since the smoke extraction area 101 typically corresponds to the location where fumes are generated, the fumes entering the smoke extraction area 101 are drawn into the desktop range hood 100 and then exhausted to the smoke exhaust area 102.

[0051] When in use, the desktop range hood 100 is mostly placed on a dining table. Taking the normal placement of the desktop range hood 100 as a reference, the side of the desktop range hood 100 closest to the ground is the bottom, and the side of the desktop range hood 100 away from the ground is the top. The smoke extraction area 101 is located in front, and the exhaust area 102 is located behind and above the smoke extraction area 101. For example, if a hot pot stove is placed in front of the desktop range hood 100, then the smoke extraction area 101 is in front of the desktop range hood 100, and the exhaust area 102 is located behind and above the smoke extraction area 101. In this way, the smoke extraction area 101 and the exhaust area 102 are spatially offset, reducing mutual interference between the smoke extraction area 101 and the exhaust area 102, and reducing the amount of oil fumes flowing back from the exhaust area 102 to the smoke extraction area 101, thus improving the smoke extraction effect of the desktop range hood 100.

[0052] Combination Figure 3 and Figure 5 As shown, in some embodiments, the air inlet 2110 is open downwards. Generally, cooking fumes tend to rise when they are generated. By designing the air inlet 2110 to open downwards, the air inlet 2110 has a relatively large contact area with the cooking fumes along the top-to-bottom direction. The cooking fumes can enter the air inlet 2110 without having to make too many turns. This design can improve the extraction effect of cooking fumes.

[0053] The air inlet 2110 can open downwards directly or diagonally downwards. When the air inlet 2110 is designed to open diagonally downwards, the area of ​​the smoke extraction zone 101 can be increased. This means that the air inlet 2110 opening diagonally downwards is tilted downwards towards the location of the equipment generating the fumes. Since the desktop range hood 100 is generally placed next to the equipment generating fumes, by opening the air inlet 2110 diagonally downwards, the air inlet 2110 and the equipment generating fumes are more directly opposite each other, maximizing the space above the equipment generating fumes to form the smoke extraction zone 101, thus better guiding the fumes to the air inlet 2110.

[0054] For example, the angle between the air inlet 2110 and the horizontal plane is α, and the condition 0°≤α≤40° is satisfied. α can be 0°, 10°, 20°, 30° or 40°. When α is 0°, the air inlet 2110 opens directly downwards. When α is greater than 0° and not greater than 40°, the air inlet 2110 opens diagonally downwards. After a lot of experiments by the inventors, when α is greater than 0° and not greater than 40°, the tabletop range hood has a better oil fume extraction effect.

[0055] Combination Figure 4 and Figure 5 As shown, in some embodiments, the air outlet 1410 is open upwards. It is understood that the desktop range hood 100 is portable and can be placed where needed, such as during outdoor dining when users sit around it. The desktop range hood 100 is placed on the table to absorb and exhaust fumes. To prevent the fumes emitted by the desktop range hood 100 from blowing directly onto any user, in this embodiment, the air outlet 1410 is designed to open upwards, with the fumes discharged upwards to the exhaust area 102, avoiding direct airflow onto the user and causing discomfort. It is understood that when the angle between the air outlet 1410 and the vertical plane is 90°, the air outlet 1410 is open directly upwards. When the air outlet 1410 is open directly upwards, the exhaust area 102 is also located directly upwards, further reducing the impact on the user.

[0056] Combination Figures 3 to 5 As shown, in some embodiments, the air inlet hood 2000 is inclined upward from the body 1000, so the front of the body 1000 and the lower part of the air inlet hood 2000 constitute the smoke extraction area 101, the air outlet 1410 is located on the top surface of the body 1000, and the upper part of the body 1000 constitutes the smoke exhaust area 102. When the oil fumes are sucked and exhausted, the oil fumes enter the air intake chamber 2120 from the air inlet 2110 in the smoke extraction area 101 and then flow through the fan 3000. Finally, the oil fumes are discharged upward through the air outlet 1410 to the smoke exhaust area 102.

[0057] Because the air inlet hood 2000 is tilted upwards from the body 1000, the air inlet 2110 can be designed to open diagonally downwards. An angled space is formed between the air inlet hood 2000 and the body 1000, constituting at least a portion of the smoke extraction area 101. This angled space gives the smoke extraction area 101 a certain smoke-collecting effect, further enhancing the extraction of cooking fumes. Furthermore, by tilting the air inlet hood 2000 upwards from the body 1000, and placing the air outlet 1410 on the top surface of the body 1000, the air inlet hood 2000 effectively separates the smoke extraction area 101 from the exhaust area 102. Cooking fumes in the exhaust area 102 that wish to flow into the smoke extraction area 101 are blocked by the air inlet hood 2000, further preventing interference between the two areas and thus further improving the smoke extraction effect of the desktop range hood 100.

[0058] Furthermore, combined Figures 3 to 5 As shown, in some embodiments, the highest point of the air inlet hood 2000 is higher than the top surface of the body 1000, and the air outlet 1410 is lower than the highest point of the air inlet 2110 but higher than the lowest point of the air inlet 2110. The highest and lowest points are measured when the desktop range hood 100 is placed in its designated position. Specifically, the desktop range hood 100 needs to be placed flexibly, so its volume ratio cannot be too large. By ensuring that the highest point of the air inlet hood 2000 is higher than the top surface of the body 1000, and the air outlet 1410 is higher than the lowest point of the air inlet 2110 but lower than the highest point of the air inlet 2110, the space occupied by the desktop range hood 100 is reduced while ensuring that the air inlet 2110 has a large area. This also helps to reduce the weight of the desktop range hood 100 and makes it easier to carry.

[0059] Understandably, the air inlet hood 2000 is tilted upwards from the body 1000, meaning it protrudes relative to the body 1000. If the air outlet 1410 is lower than the lowest point of the air inlet 2110, the protrusion of the air inlet hood 2000 relative to the body 1000 will be greater, potentially causing a disproportionate appearance, while the air outlet 1410 is higher than the highest point of the air inlet 2110. With the air inlet 2110 remaining the same size, the body 1000 will become larger, making it less portable. In this embodiment, by optimizing the relative positions of the air outlet 1410 and the air inlet 2110, both the suction and exhaust effect and space occupancy of the desktop range hood 100 are considered.

[0060] Combination Figures 1 to 5 as well as Figure 7As shown, in some embodiments, the housing 1000 includes a first housing portion 1100, a second housing portion 1200, and a base 1300. A fan 3000 is mounted to the second housing portion 1200, such as inside the second housing portion 1200, and a third flow guide cavity 1003 is formed between the fan 3000 and the second housing portion 1200 (the walls of the second housing portion 1200 opposite to the fan 3000 form a first side plate 1210). The first housing portion 1100... The 00 is provided with a first flow guide cavity 1001, a first shell 1100 and a second shell 1200 are connected and fixed, and a base 1300 surrounds the first shell 1100 and the second shell 1200, thereby forming a second flow guide cavity 1002 between the base 1300 and the fan 3000. This assembly facilitates the assembly of the desktop range hood 100 and also facilitates the communication between the first flow guide cavity 1001, the second flow guide cavity 1002 and the third flow guide cavity 1003.

[0061] With the base 1300 set up, the base 1300 forms an oil collection box 1300, which can receive the oil discharged by the fan 3000. That is, the base 1300 and the oil collection box 1300 are combined together, thus reducing the number of parts and saving costs.

[0062] Combination Figure 4 , Figure 5 and Figure 7 As shown, in some embodiments, the fan 3000 and the first housing 1100 are connected to the same wall of the second housing 1200. Since the first guide cavity 1001, the second guide cavity 1002, and the third guide cavity 1003 form a U-shaped arrangement, and the first guide cavity 1001 is located in the first housing 1100, and the third guide cavity 1003 is located between the fan 3000 and the second housing 1200, by connecting the fan 3000 and the first housing 1100 to the same wall of the second housing 1200, it is possible to ensure that the second guide cavity 1002 has a certain length, while also reducing the space occupied.

[0063] Combination Figure 4 and Figure 7As shown, in some embodiments, at least a portion of the air inlet shroud 2000 is integrally formed with at least a portion of the first housing 1100, and the first guide cavity 1001 communicates with the air inlet cavity 2120. Since at least a portion of the first housing 1100 is integrally formed with at least a portion of the air inlet shroud 2000, the air inlet shroud 2000 can be installed when the first housing 1100 is connected and fixed to the second housing 1200. This integral forming reduces the number of parts and facilitates assembly. For example, the air inlet shroud 2000 includes an air inlet shell 2100 and an air inlet mesh 2200. The air inlet shell 2100 is provided with an air inlet 2110, and the air inlet mesh 2200 is disposed at the air inlet 2110. The air inlet shell 2100 is integrally formed with the first housing 1100, while the air inlet mesh 2200 is screwed and fixed to the air inlet shell 2100.

[0064] Generally, the desktop range hood 100 also includes a first filter 4100, which is located at the air inlet 2110. The air inlet housing 2100 and the air inlet mesh 2200 together clamp the first filter 4100, enabling preliminary filtration of the fumes. Similarly, the desktop range hood 100 also includes a second filter 4200, which is located at the air outlet 1410. The second filter 4200 further filters the fumes discharged by the fan 3000. For example, the desktop range hood 100 includes a top cover 1400 with an air outlet 1410, and the top cover 1400 and the second housing 1200 are connected and clamp the second filter 4200. The first filter 4100 and the second filter 4200 are designed in a corrugated shape, which allows the first filter 4100 and the second filter 4200 to have a larger interception area in a limited space. In addition, the first filter 4100 and the second filter 4200 are preferably made of fire-resistant materials to avoid charring or even fire.

[0065] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A desktop range hood, characterized in that, include: The fuselage (1000) is provided with a first flow guide cavity (1001), a second flow guide cavity (1002), and a third flow guide cavity (1003) connected in sequence, the first flow guide cavity (1001), the second flow guide cavity (1002), and the third flow guide cavity (1003) forming a U-shaped arrangement; and A fan (3000) is provided, the inlet of which is connected to the third guide cavity (1003), and the fumes are adapted to flow sequentially through the first guide cavity (1001), the second guide cavity (1002) and the third guide cavity (1003) when the fan (3000) is working.

2. The desktop range hood as described in claim 1, characterized in that, The first guide cavity (1001) is located on one side of the fan (3000) in the axial direction, the second guide cavity (1002) is located on one side of the fan (3000) in the radial direction, and the third guide cavity (1003) is located on the other side of the fan (3000) in the axial direction.

3. The desktop range hood as described in claim 2, characterized in that, The body (1000) includes a first side plate (1210), the first side plate (1210) and the inlet of the fan (3000) are opposite each other, and the third guide cavity (1003) is disposed between the first side plate (1210) and the fan (3000), with the first side plate (1210) protruding toward the fan (3000).

4. The desktop range hood as described in claim 3, characterized in that, Along the axial direction of the fan (3000), the first side plate (1210) is located between the rotation axis of the fan (3000) and the second guide cavity (1002).

5. The desktop range hood as described in claim 3, characterized in that, The first side plate (1210) is arc-shaped and protrudes.

6. The desktop range hood as described in claim 3, characterized in that, Along the axial direction of the fan (3000), the minimum distance between the first side plate (1210) and the fan (3000) is 20mm to 30mm.

7. The desktop range hood as described in claim 3, characterized in that, The first side panel (1210) includes a first plate layer and a second plate layer, and a cavity is provided between the first plate layer and the second plate layer, wherein sound-absorbing cotton (1211) is provided in the cavity; Alternatively, the first side panel (1210) may have sound-absorbing cotton (1211) on the side facing the fan (3000).

8. The desktop range hood as described in claim 3, characterized in that, The body (1000) includes a handle (1230), and the first side plate (1210) is recessed on the side opposite to the fan (3000) to form a clearance cavity (1220) between itself and the handle (1230).

9. The desktop range hood as described in claim 1, characterized in that, The body (1000) includes an oil collection box (1300), which is located below the fan (3000) to receive the oil discharged by the fan (3000), and the second guide cavity (1002) is located between the fan (3000) and the oil collection box (1300).

10. The desktop range hood as described in claim 1, characterized in that, The desktop range hood includes an air inlet hood (2000) disposed on the body (1000). The air inlet hood (2000) is provided with an air inlet cavity (2120) and an air inlet (2110). The air inlet (2110) and the air inlet cavity (2120) are connected. The air inlet cavity (2120) intersects with and is connected to the first guide cavity (1001).

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