Range hood

Abstract

The utility model discloses a smoke exhaust ventilator, which is provided with a smoke exhaust channel, and comprises a smoke collecting hood, a smoke exhaust fan, a smoke exhaust fan and a smoke exhaust fan, the smoke collecting hood is provided with a smoke collecting cavity, a first end and a second end in the length direction, the first end of the smoke collecting hood is provided with an air outlet, and the smoke collecting cavity is communicated with the smoke exhaust channel through the air outlet; the purification assembly comprises a plurality of air uniformizing frames, and the air uniformizing frames are installed on the exhaust fume collecting hood and are sequentially arranged in the length direction of the exhaust fume collecting hood; a ventilation hole is formed in the middle of the air uniformizing frame and communicates with the smoke collecting cavity. In the direction from the first end to the second end, the hole diameters of the multiple ventilation holes of the multiple air uniformizing frames are gradually increased; and the plurality of purification net discs are respectively and rotatably mounted in the plurality of ventilation holes. According to the technical scheme provided by the utility model, the range hood is uniformly stressed in the working process and is not easy to vibrate, so that the noise generated in the working process of the range hood is reduced, and meanwhile, the purification efficiency of the range hood is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hood extraction, in particular to a range hood. Background Art

[0002] With the improvement of people's living standards, range hoods have become a must-have household appliance in every household kitchen. A range hood is usually equipped with a fan and multiple purification nets. Under the suction of the fan, kitchen fumes enter the exhaust channel of the range hood through the purification nets and are discharged through the exhaust channel. However, due to the unreasonable structural design of existing range hoods, the air volume of fumes passing through different purification nets is uneven, which makes the range hood easily vibrate due to uneven force during operation, causing loud noise and poor purification efficiency of the range hood. Utility Model Content

[0003] The main purpose of the utility model is to provide a smoke extraction device, aiming to reduce the noise generated by the range hood during operation and improve the purification efficiency of the range hood.

[0004] In order to achieve the above-mentioned object, the range hood provided by the utility model has a smoke exhaust channel, and the range hood comprises:

[0005] A smoke collecting hood, wherein the smoke collecting hood has a smoke collecting cavity, the smoke collecting hood has a first end and a second end in a length direction, the first end of the smoke collecting hood has an air outlet, and the smoke collecting cavity is connected to the smoke exhaust channel through the air outlet;

[0006] A purification component, the purification component comprising:

[0007] A plurality of air distribution frames, the plurality of air distribution frames are mounted on the smoke collecting hood and arranged in sequence along the length direction of the smoke collecting hood; a ventilation hole is opened in the middle of the air distribution frame, and the ventilation hole is connected to the smoke collecting chamber; in the direction from the first end to the second end, the apertures of the plurality of ventilation holes of the plurality of air distribution frames gradually increase;

[0008] A plurality of purification net plates are rotatably installed in the plurality of ventilation holes respectively.

[0009] Optionally, the smoke hood is provided with two plug-in racks arranged at intervals, both of the two plug-in racks are provided with plug-in positions, and the two plug-in positions are arranged opposite to each other, and the opposite side edges of the wind equalizing frame are respectively plugged into the two plug-in positions.

[0010] Optionally, a side wall of the plug-in frame enclosing the plug-in position is provided with a connecting hole, and the air equalizing frame is provided with a mounting hole at a position corresponding to the connecting hole, so that fasteners can connect the plug-in frame and the air equalizing frame.

[0011] Optionally, the purification mesh disk is cone-shaped, and has a large-diameter end and a small-diameter end, and the small-diameter end is configured to be close to a smoke source.

[0012] Optionally, the purification component further includes a plurality of drive motors, and the plurality of drive motors are respectively mounted on the plurality of wind balancing frames;

[0013] The purification network plate includes a connecting column and a plurality of spokes, one end of the plurality of spokes is connected to the outer side wall of the connecting column, and the other end is radially arranged around the connecting column as the center, and an air inlet gap is formed between two adjacent spokes. The connecting column is connected to the driving shaft of the driving motor so that the plurality of spokes can rotate under the drive of the driving motor.

[0014] Optionally, the wind equalizing frame has a windward surface and a leeward surface opposite to each other, the windward surface is configured to face the smoke source, a mounting bracket is provided on the leeward surface, two ends of the mounting bracket are respectively arranged on the hole walls of the ventilation hole, and the drive motor is installed in the middle of the mounting bracket; and / or,

[0015] The spokes are in the shape of straight lines or arcuate lines.

[0016] Optionally, the purification network disk has a windward side and a leeward side opposite to each other, and the windward side is configured to face the smoke source;

[0017] The cross section of the spoke is triangular, the top of the spoke is located on the windward side, and the bottom of the spoke is located on the leeward side; or,

[0018] The cross section of the spoke is trapezoidal, the upper base of the spoke is located on the windward side, and the lower base of the spoke is located on the leeward side.

[0019] Optionally, the spoke has a wind-shielding slope facing the air inlet gap, an angle α between the wind-shielding slope and a first direction is 20°-30°, and the first direction is perpendicular to a width direction of the air inlet gap.

[0020] Optionally, the smoke exhaust channel is provided with a fan, the rotation speed of the fan is n1, and the wind speed V of the ventilation hole is obtained by the rotation speed of the fan, and V satisfies the following relationship:

[0021] V≤H*N*n2 / 60

[0022] Among them, H is the height of the spoke, N is the number of spokes, and n2 is the speed of the drive motor.

[0023] Optionally, the purification net plate further includes a connecting ring and a reinforcing ring, the connecting ring and the reinforcing ring are arranged around the connecting column as the center, one end of the spoke away from the connecting column is connected to the connecting ring, and the reinforcing ring is staggeredly connected to the middle of the spoke;

[0024] A stop bar is provided between every two adjacent spokes, one end of the stop bar is connected to the reinforcement ring, and the other end of the stop bar is connected to the connection ring.

[0025] The technical solution of the utility model is that since the air outlet is arranged at the first end of the smoke hood, the suction force of the fan will have a greater force on the ventilation holes closer to the first end, so that the flow speed of the oil fume gas entering the purification net disk near the first end is relatively large, while the flow speed of the oil fume gas entering the purification net disk near the second end is relatively small. Since the apertures of the multiple ventilation holes of the wind balancing frame gradually increase in the direction from the first end to the second end, the area of ​​the purification net disk closer to the second end can be larger, which is conducive to balancing the ventilation volume of multiple purification net disks and ensuring that the amount of oil fume gas entering each purification net disk in the same time is equal, so that the range hood is evenly stressed during operation and is not easy to vibrate, thereby reducing the noise generated by the range hood during operation; at the same time, the kitchen oil fume gas can evenly and quickly enter the purification net disk for subsequent purification, thereby improving the purification efficiency of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the structure of the range hood of the utility model;

[0028] Figure 2 It is a partial structural schematic diagram of the smoke collecting hood of the range hood of the utility model from one perspective;

[0029] Figure 3 It is a partial structural schematic diagram of the smoke collecting hood of the range hood of the utility model from another perspective;

[0030] Figure 4 It is a structural schematic diagram of the air distribution frame and the net plate of the range hood of the utility model;

[0031] Figure 5 It is a structural schematic diagram of the network disk of the range hood of the utility model from one perspective;

[0032] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0033] Figure 7 This is a structural schematic diagram of the network disk of the range hood of the utility model from another perspective.

[0034] Description of Figure Numbers:

[0035] Label name Label name 100 Fume hood 101 First End 102 Second end 110 Air outlet 120 Plug-in rack 121 Plug-in position 122 Connection hole 200 Wind balancing frame 201 Windward side 202 Leeward side 210 Ventilation holes 220 Mounting Bracket 300 Purification network disk 301 Large diameter end 302 Small diameter end 303 Windward side 304 Leeward side 310 Connecting column 320 Spokes 321 Windshield slope 330 Air inlet clearance 340 Connecting ring 350 Reinforcement ring 360 Bar 400 Drive motor

[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) 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.

[0039] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0040] The specific structure of the range hood will be mainly described below.

[0041] Reference Figures 1 to 7In an embodiment of the utility model, the range hood has a smoke exhaust channel, and the range hood includes a smoke collecting hood 100 and a purification component. The smoke hood 100 has a smoke collecting chamber, and the smoke hood 100 has a first end 101 and a second end 102 in the length direction. The first end 101 of the smoke hood 100 has an air outlet 110, and the smoke collecting chamber is connected with the smoke exhaust channel through the air outlet 110; the purification component includes a plurality of wind equalizing frames 200 and a plurality of purification net disks 300, and the plurality of wind equalizing frames 200 are installed on the smoke hood 100 and are arranged in sequence along the length direction of the smoke hood 100; a ventilation hole 210 is opened in the middle of the wind equalizing frame 200, and the ventilation hole 210 is connected with the smoke collecting chamber; in the direction from the first end 101 to the second end 102, the apertures of the plurality of ventilation holes 210 of the plurality of wind equalizing frames 200 gradually increase; the plurality of purification net disks 300 are rotatably installed in the plurality of ventilation holes 210, respectively. During operation, the kitchen fume gas enters the purification network disk 300 under the suction of the fan. After the purification network disk 300 intercepts and filters the fume gas to a certain extent, the fume gas enters the exhaust channel through the smoke collecting chamber and the air outlet 110 of the fume collecting hood 100 and is discharged. Since the air outlet 110 is arranged at the first end 101 of the fume collecting hood 100, the suction force of the fan will be greater on the ventilation hole 210 closer to the first end 101, so that the flow speed of the fume gas entering the purification network disk 300 near the first end 101 is relatively large, while the flow speed of the fume gas entering the purification network disk 300 near the second end 102 is relatively small. Since the apertures of the multiple ventilation holes 210 of the wind equalizing frame 200 gradually increase in the direction from the first end 101 to the second end 102, the area of ​​the purification network disk 300 closer to the second end 102 can be larger, which is conducive to balancing the ventilation volume of multiple purification network disks 300 and ensuring that the amount of oil fume gas entering each purification network disk 300 in the same time is equivalent. In this way, the range hood is evenly stressed during operation and is not prone to vibration, thereby reducing the noise generated by the range hood during operation; at the same time, the kitchen oil fume gas can enter the purification network disk 300 evenly and quickly for subsequent purification, thereby improving the purification efficiency of the range hood.

[0042] In some embodiments, the purification component also includes multiple drive motors 400, which are respectively installed on the multiple wind equalizing frames 200; the purification network disk 300 includes a connecting column 310 and a plurality of spokes 320, one end of the plurality of spokes 320 is connected to the outer wall of the connecting column 310, and the other end is arranged radially around the connecting column 310 as the center, and an air inlet gap 330 is formed between two adjacent spokes 320, and the connecting column 310 is connected to the driving shaft of the driving motor 400 so that the plurality of spokes 320 rotate under the drive of the driving motor 400. In this embodiment, the spokes 320 can be driven to rotate by driving the motor 400. The oil fume gas enters the purification network disk 300 under the action of suction and gradually passes through the air inlet gap 330 formed between the spokes 320. During the flow of the oil fume gas, part of the oil fume gas is intercepted by the spokes 320 and cannot pass through the purification network disk 300. In this way, the spokes 320 of the purification network disk 300 intercept and filter the oil fume gas to achieve a purification effect.

[0043] Among them, regarding the installation method of the drive motor 400, in some embodiments, the wind balancing frame 200 has a windward surface 201 and a leeward surface 202 opposite to each other, the windward surface 201 is configured to face the smoke source, and a mounting bracket 220 is provided on the leeward surface 202, and the two ends of the mounting bracket 220 are respectively arranged on the hole wall of the ventilation hole 210, and the drive motor 400 is installed in the middle of the mounting bracket 220. That is, the drive motor 400 is installed on the wind balancing frame 200 through the mounting bracket 220, and the mounting bracket 220 and the drive motor 400 are installed on the leeward surface 202 of the wind balancing frame 200, which will not hinder the oil smoke gas from entering the purification network disk 300.

[0044] Regarding the shape of the spoke 320, in some embodiments, the spoke 320 is in the shape of a straight strip or an arc strip. In some embodiments, the purification net disk 300 has a windward side 303 and a leeward side 304 opposite to each other, and the windward side 303 is configured to face the smoke source; the cross section of the spoke 320 is triangular, the top of the spoke 320 is located on the windward side 303, and the bottom of the spoke 320 is located on the leeward side 304; or, the cross section of the spoke 320 is trapezoidal, the upper bottom of the spoke 320 is located on the windward side 303, and the lower bottom of the spoke 320 is located on the leeward side 304. That is, the spoke 320 adopts an inverted triangle or inverted trapezoidal structure to improve the purification efficiency of the purification net disk 300.

[0045] Furthermore, the spoke 320 has a wind shielding inclined surface 321 facing the air inlet gap 330, and the angle α between the wind shielding inclined surface 321 and the first direction is 20°-30°, and the first direction is perpendicular to the width direction of the air inlet gap 330. When the range hood is working, the oil fume gas enters the air inlet gap 330 from the first direction as a whole, and the oil fume gas is easily intercepted by the wind shielding inclined surface 321 of the spoke 320 during the flow process, so that the oil fume is easily filtered, thereby improving the purification effect of the purification network disk 300.

[0046] In order to improve the purification efficiency of the range hood, in some embodiments, the smoke exhaust channel is provided with a fan, the rotation speed of the fan is n1, and the wind speed V of the ventilation hole 210 is obtained by the rotation speed of the fan, and V satisfies the following relationship:

[0047] V≤H*N*n2 / 60

[0048] Wherein, H is the height of the spoke 320 , N is the number of the spoke 320 , and n2 is the rotation speed of the driving motor 400 .

[0049] In this embodiment, the height H of the spoke 320 is the distance from the windward side 303 to the leeward side 304 of the purification network disk 300, the number N of the spokes 320 is the total number of spokes 320 designed in one purification network disk 300, and the speed n2 (rpm) of the drive motor 400 is the initial default speed, which can be queried and obtained through the equipment model association of the range hood.

[0050] The first time duration T1 consumed by the oil fume gas to pass through the purification network disk 300 can be determined according to the height H of the spoke 320 and the wind speed V of the ventilation hole 210, that is, the flow rate of the oil fume gas, where T1=H / V;

[0051] The second time duration T2 consumed by the current spoke 320 to move to the next spoke 320 can be determined according to the speed n2 of the driving motor 400, that is, the speed of the spoke 320, and the number N of the spokes 320, T2 = 60 / N*n2;

[0052] When the first time length is greater than or equal to the second time length, that is, H / V≥60 / N*n2, that is, V≤H*N*n2 / 60, it indicates that the time taken for the oil fume gas to pass through the air inlet gap 330 between the spokes 320 and the spokes 320 is greater than the time taken for the spokes 320 to rotate through the air inlet gap 330, indicating that the oil fume gas is intercepted by the spokes 320 before it has time to pass through the air inlet gap 330. At this time, the oil fume gas cannot pass through the purification network disk 300, and the oil fume purification efficiency of the purification network disk 300 reaches 100%. Therefore, the purification efficiency of the purification network disk 300 can be controlled by controlling the speed of the fan.

[0053] In some embodiments, the purification net disk 300 is cone-shaped, and the purification net disk 300 has a large diameter end 301 and a small diameter end 302, and the small diameter end 302 is configured to be close to the smoke source. The purification net disk 300 is arranged in a cone-shaped manner, which can increase the effective area of ​​the purification net disk 300, thereby improving the purification effect of the purification net disk 300. The small diameter end 302 is configured to be close to the smoke source, so that the purification net disk 300 has a guiding effect, improves the flow effect of the oil smoke gas, and thus improves the purification efficiency of the purification net disk 300.

[0054] In some embodiments, the purification network disk 300 further includes a connecting ring 340 and a reinforcing ring 350, the connecting ring 340 and the reinforcing ring 350 are arranged around the connecting column 310, the end of the spoke 320 away from the connecting column 310 is connected to the connecting ring 340, and the reinforcing ring 350 is staggeredly connected to the middle of the spoke 320; a stop bar 360 is provided between each two adjacent spokes 320, one end of the stop bar 360 is connected to the reinforcing ring 350, and the other end is connected to the connecting ring 340. The setting of the connecting ring 340 and the reinforcing ring 350 is conducive to increasing the stability of the spoke 320, effectively reducing the vibration generated by the spoke 320 during the rotation process, thereby reducing the noise generated during the operation of the range hood. The stop bar 360 is set, and the stop bar 360 can also intercept and filter the oil smoke, thereby improving the filtering efficiency of the purification network disk 300.

[0055] Regarding the installation method of the air equalizing frame 200, in some embodiments, two plug-in racks 120 arranged at intervals are provided on the smoke hood 100, and both of the two plug-in racks 120 are provided with a plug-in position 121, and the two plug-in positions 121 are arranged opposite to each other, and the opposite side edges of the air equalizing frame 200 are respectively plugged into the two plug-in positions 121. The plug-in method facilitates the replacement or disassembly and maintenance of the air equalizing frame 200. In order to fix the air equalizing frame 200, the side wall of the plug-in rack 120 enclosing the plug-in position 121 is provided with a connecting hole 122, and the air equalizing frame 200 is provided with a mounting hole at the position corresponding to the connecting hole 122, so that fasteners can connect the plug-in rack 120 and the air equalizing frame 200. The fasteners may specifically be screws or bolts, and the mounting holes and / or connecting holes 122 may be provided as threaded holes, and the fasteners may be screwed into the connecting holes 122 and the mounting holes in sequence, thereby firmly mounting the air distribution frame 200 on the smoke hood 100, thereby ensuring that the air distribution frame 200 does not make any noise during operation of the range hood, thereby reducing the noise generated by the range hood during operation.

[0056] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A range hood, characterized in that: The range hood has a smoke exhaust passage, and the range hood comprises: A smoke collecting hood, wherein the smoke collecting hood has a smoke collecting cavity, the smoke collecting hood has a first end and a second end in a length direction, the first end of the smoke collecting hood has an air outlet, and the smoke collecting cavity is connected to the smoke exhaust channel through the air outlet; A purification component, the purification component comprising: A plurality of air distribution frames, the plurality of air distribution frames are mounted on the smoke collecting hood and arranged in sequence along the length direction of the smoke collecting hood; a ventilation hole is opened in the middle of the air distribution frame, and the ventilation hole is connected to the smoke collecting chamber; in the direction from the first end to the second end, the apertures of the plurality of ventilation holes of the plurality of air distribution frames gradually increase; A plurality of purification net plates, each of which is rotatably installed in the plurality of ventilation holes; The smoke collecting hood is provided with two plug-in racks arranged at intervals, both of the two plug-in racks are provided with plug-in positions, and the two plug-in positions are arranged oppositely, and the opposite side edges of the wind distribution frame are respectively plugged into the two plug-in positions.

2. The range hood according to claim 1, characterized in that: The side wall of the plug-in frame enclosing the plug-in position is provided with a connection hole, and the wind equalizing frame is provided with a mounting hole at a position corresponding to the connection hole, so that fasteners can connect the plug-in frame and the wind equalizing frame.

3. The range hood according to claim 1, characterized in that: The purification net disk is cone-shaped and has a large-diameter end and a small-diameter end, and the small-diameter end is configured to be close to a smoke source.

4. The range hood according to claim 1, characterized in that: The purification component further includes a plurality of drive motors, and the plurality of drive motors are respectively mounted on the plurality of wind balancing frames; The purification network plate includes a connecting column and a plurality of spokes, one end of the plurality of spokes is connected to the outer side wall of the connecting column, and the other end is radially arranged around the connecting column as the center, and an air inlet gap is formed between two adjacent spokes. The connecting column is connected to the driving shaft of the driving motor so that the plurality of spokes can rotate under the drive of the driving motor.

5. The range hood according to claim 4, characterized in that: The wind equalizing frame has a windward surface and a leeward surface opposite to each other, the windward surface is configured to face the smoke source, a mounting bracket is provided on the leeward surface, two ends of the mounting bracket are respectively arranged on the hole wall of the ventilation hole, and the driving motor is installed in the middle of the mounting bracket; and / or, The spokes are in the shape of straight lines or arcuate lines.

6. The range hood according to claim 4, characterized in that: The purification net plate has a windward side and a leeward side opposite to each other, and the windward side is configured to face the smoke source; The cross section of the spoke is triangular, the top of the spoke is located on the windward side, and the bottom of the spoke is located on the leeward side; or, The cross section of the spoke is trapezoidal, the upper base of the spoke is located on the windward side, and the lower base of the spoke is located on the leeward side.

7. The range hood according to claim 6, characterized in that: The spoke has a wind-shielding inclined surface facing the air inlet gap, and an included angle α between the wind-shielding inclined surface and a first direction is 20°-30°, and the first direction is perpendicular to a width direction of the air inlet gap.

8. The range hood according to claim 4, characterized in that: The smoke exhaust passage is provided with a fan, the speed of which is n1, and the wind speed V of the ventilation hole is obtained by the speed of the fan, where V satisfies the following relationship: V≤H*N*n2 / 60 Among them, H is the height of the spoke, N is the number of spokes, and n2 is the speed of the drive motor.

9. The range hood according to claim 4, characterized in that: The purification net plate further includes a connecting ring and a reinforcing ring, wherein the connecting ring and the reinforcing ring are arranged around the connecting column as the center, the end of the spoke away from the connecting column is connected to the connecting ring, and the reinforcing ring is staggeredly connected to the middle of the spoke; A stop bar is arranged between every two adjacent spokes, one end of the stop bar is connected to the reinforcement ring, and the other end of the stop bar is connected to the connection ring.

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